HomeMy WebLinkAboutProposal_TAIT_Proposal Design
November 10, 2025
PROPOSAL FOR CITY OF DIAMOND BAR
FY 25/26 CIVIL ENGINEERING DESIGN SERVICES FOR:
Residential & Collector Streets Rehabilitation, Arterial Streets
Rehabilitation, and Residential Neighborhood ADA Curb Ramps
Improvement Project
TAIT & Associates, Inc.
701 Parkcenter Drive
Santa Ana, CA
714-560-8200
www.tait.com
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A. Cover Letter
November 10, 2025
City of Diamond Bar
Public Works Department
21810 Copley Drive,
Diamond Bar, CA 91765
Attention: Christian Malpica, Associate Engineer/Project Manager
RE: FY 25/26 Civil Engineering Design Services For: Residential & Collector Streets Rehabilitation,
Arterial Streets Rehabilitation, And Residential Neighborhood Ada Curb Ramps Improvement Project
Dear Mr. Malpica,
TAIT & Associates, Inc. (TAIT) is pleased to submit this proposal in response to the City of Diamond Bar’s (City)
Request for Proposals for FY 25/26 Civil Engineering Design Services.
Firm Capabilities and Staff Availability. TAIT is a family-owned, multidisciplinary firm founded in 1964, providing
civil engineering, surveying, environmental, architectural, and construction management services.
Headquartered in Santa Ana with regional offices in Corona, Sacramento, Boise, Denver, Dallas, and Atlanta,
TAIT employs approximately 200 professional and technical staff. Our team is structured to provide responsive,
on-call-style engineering support throughout the City’s three-year program, ensuring continuity and consistent
service across all design phases. To complement our in-house resources, TAIT has partnered with GMU
Engineers and Geologists (GMU) and TJW Engineering, Inc. (TJW), both of whom bring extensive experience
supporting municipal roadway and infrastructure improvement projects across Southern California.
Proposed Project Lead. The City’s program will be led by Dennis Postler, P.E., Director of Public Infrastructure,
who brings nearly 40 years of experience managing roadway, drainage, and utility design for public agencies
across Southern California. Dennis has successfully delivered numerous multi-year street rehabilitation and ADA
improvement programs and will serve as the City’s primary point of contact, supported by TAIT’s in-house
design, survey, QA/QC, and geotechnical partners.
Commitment to Service. We aim to act as an extension of the City’s staff. I, Jacob Vandervis, P.E., Chief
Operations Officer, am authorized to negotiate and bind the firm contractually for this proposal and any
resulting agreement. Should you have any questions, I can be reached at phone number 714-560-8677, email
jacobv@tait.com, and address 701 Parkcenter Drive, Santa Ana, CA 92705. We have received all addenda and
thank you for this opportunity to submit our qualifications and look forward to further discussing with you our
capabilities and commitment to working with the City.
Very truly yours,
TAIT & ASSOCIATES, INC.
Jacob Vandervis, P.E., COO/Vice President
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
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B. PROJECT APPROACH AND PROPOSED SCOPE
Project Understanding & Site Observations
TAIT has reviewed the RFP, conducted preliminary research and investigations, and performed
an initial review of the project limits to ensure a comprehensive understanding of the City’s needs for
this program. In addition, we have submitted questions and received responses from City staff to help
clarify the City’s expectations. Based on this research and feedback, the following items comprise our
overall understanding of the project scope.
As noted in the RFP and subsequent addenda, the City has identified 10 separate projects that
make up this three-year paving program. This consists of three(3) CDBG Curb Ramp Projects in
Residential Areas 6, 7 and 1; two (2) Residential & Collector Street Rehabilitation Projects for Areas 5
and 6; and five (5) Arterial Street Rehabilitation Projects consisting of nine segments of five different
roadways. The two residential areas comprise approximately 25 miles of streets and the five arterial
projects collectively include more than nine miles of roadways.
• The first five projects make up the Total Base Bid Items, and the remaining 5 projects fall under
Optional Items. Projects 1 and 2 are anticipated for design/construction of Year 1 of the three-year
program.
• The first phase includes the analysis and improvement of up to 24 CDBG-funded curb ramps, with 8
located in each of Areas 6, 7, and 1.
• The City has also noted that each project is a stand-alone project with its own PS&E Bidding
Package. This coincides with the Base Fee Schedule Table provided in the RFP.
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• This project will also include:
o Analysis of removal and reconstruction of damaged PCC curb & gutter, driveway
approaches, and cross gutters to resolve any localized drainage issues.
o Evaluation of arterial streets for the inclusion of new or improved bike lanes, consistent with
the City’s Complete Streets Policy and current Caltrans design standards.
o Full survey/mapping services.
o Full geotechnical pavement analysis and recommendations.
o Utilities research and identification of potential conflicts.
o Evaluation of constructability issues and recommendations for phasing, staging, and traffic
control considerations.
o Assessment of community impacts such as parking removal, extended closures, and access
to schools or businesses.
o Coordination with other agencies, such as Caltrans, Los Angeles County, and adjacent
municipalities, for preparing and obtaining necessary clearances and permits.
Per the City’s 2025 Pavement Management Plan, the City’s overall roadway weighted PCI
average is 78, which equates to roadways in “Good” condition. For the Projects that are part of this
Proposal, the two residential areas have street rankings ranging from Fair to Good, and the arterial
streets have segments within their limits ranging from Poor to Good.
Based on our previous experience with similar municipal roadway projects, the following key
tasks have been identified as essential considerations during the design phase:
Detailed Survey & Field Investigation to validate Existing Street conditions
Geotechnical Investigation to validate existing pavement sections and conditions
Careful review of pedestrian ramps to ensure they are compliant with ADA requirements.
Preparation of detailed construction drawings that are constructible and clear.
Preparation of detailed project specifications that properly identify bid items
Attention to the City’s goals, budget, and needs during the life of the project.
Once the project has been fully understood, TAIT will carefully review the staffing needs and
assignments for each project. Of notable importance in our approach is the assignment of Dennis
Postler, P.E., as Project Manager, who has provided design engineering services to local agencies for
roadway rehabilitation projects of this nature for many years. Secondly, selection of QA/QC Manager,
David Sloan, will ensure the team has the required quality control implemented on the job.
Based on our understanding of the project, TAIT has assigned ample project team members to
this project to ensure the project schedule can be maintained. The selected team has worked together
on numerous roadway projects and is ready to provide successful services to the City on this contract.
Refer to Section F of this proposal for detailed project team information.
As noted above, the City has identified ten projects consisting of three CDBG Curb Ramp
Projects in Residential Areas 6, 7, and 1; two Residential and Collector Street Rehabilitation Projects for
Areas 5 and 6; and five Arterial Street Rehabilitation Projects covering nine segments along five
different roadways.
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TAIT has provided tasks, hours, and fees for all ten projects. Because the overall approach and
scope of services will be consistent across each assignment, the following write-up focuses on Project
No. 2 Arterial Street Rehabilitation of Brea Canyon Road: Diamond Bar Blvd to Pathfinder Rd; Brea
Canyon Road: Pathfinder Rd to Washington Ave; and Diamond Bar Boulevard: SR-60 Off-Ramp to City
Limit as a representative example. TAIT will apply the same proven methodology to each project,
adapting as necessary to meet the specific needs and conditions of each site.
Proposed Scope of Work (Project 2)
Based on our review of the City’s scope of work, the responses received from City staff, and our
mapping review of the project area, the following scope of work is proposed:
Task 1: Project Coordination
TAIT will work closely with the City’s Project Manager to ensure the quality of project contract
documents and maintain control over budget and schedule. A Design Kickoff Meeting will be held at the
start of the project with TAIT’s key team members, City staff, and other affected parties, if applicable, to
establish clear lines of communication and review the final scope, schedule, milestones, and other
project details. TAIT will prepare a meeting agenda for initial circulation. Upon completion of the
meeting, TAIT will also prepare meeting minutes for circulation, review and comments. TAIT will also
prepare a meeting agenda for initial circulation.
It is anticipated that the City will provide all pertinent record information for the existing City
streets and utilities, including as-built plans, record drawings, the Pavement Management Plan (PMP),
boilerplate specifications, CAD files, and GIS data within the project limits.
This task includes the hours associated with the anticipated design progress meetings
throughout the course of the project. A total of five team meetings are assumed, with the Project
Manager and Project Engineer attending each. At a minimum, one Design Kickoff Meeting and four
monthly progress meetings are included. (Design review meetings for submittals are included under the
Design Tasks.)
This task also includes hours for contract and project management, preparation of invoicing
forms required under the contract, and implementation of TAIT’s QA/QC program.
Deliverables: Meeting Agenda & Minutes
Task 2: Field Review, Survey & Utility Investigation
As noted in the RFP, this includes Field Investigations, Surveying, Utility Research, Potholing and Utility
Locating, and Geotechnical Investigations. These services are discussed in further detail below.:
FIELD INVESTIGATIONS
TAIT’s key team members will conduct a field reconnaissance with the City team to verify
project limits and impacts. The design field walk will include ADA verification of curb ramps and
driveways, as well as marking/identifying any sidewalk, curb & gutter, utility, and other
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miscellaneous work items in the field. Field markings and record keeping will be performed per
City requirements
SURVEYING
Record information from City files, including but not limited to the GIS geodatabase and latest
aerials with 2-foot contours, will be reviewed to obtain available design records and utility
information. Obtained records will also be correlated with Los Angeles County GIS data, if
available, to prepare the project Base Map.
TAIT will perform a drone/aerial survey extending the full width of the public right-of-way to
establish horizontal control, confirm centerline, surface utilities, all above-ground structures,
adjacent curb and gutter alignments, and any other landscaping/hardscaping items.
Topographic ground survey will be performed for areas requiring more detailed elevation such
as pedestrian ramp locations.
UTILITY RESEARCH
As part of the base scope of work, TAIT will prepare and distribute three utility notices to
affected utility agencies. The first notice will be issued at project inception to inform the utilities
of the project and request records for areas where potential conflicts are anticipated. TAIT will
prepare the first notice letters along with a utility mail-merge document and forward them to
the City for printing, signing, and mailing. The second and final notices will be distributed by
TAIT via email to all applicable utilities for expedited processing following the 90-percent design
submittal and final plan approval, respectively. Each notice will include a reduced-size plan for
the utility’s review and comment. Utilities without email contacts will be notified through U.S.
mail. Any utilities identified with potential conflicts will receive a conflict notification, and TAIT
will coordinate the necessary relocations with each agency.
POTHOLING/UTILITY LOCATING
At the City’s option, TAIT has included budgetary figures for retaining a utility locator to perform
either scanning (GPR/tracing) or potholing at critical crossings for the proposed storm drain
improvements. A budgetary allowance of $44,000 has been included as an Optional Task to
obtain proposals for two days of potholing (up to ten potholes) for the City’s review and
approval.
Hours for coordinating, reviewing, and incorporating the utility potholing data into the design
plans have been included within the corresponding design phases. This task assumes that a no-
fee permit will be issued and that formal traffic control plans will not be required. All potholes
are assumed to be backfilled and finished with cold patch asphalt. Any such potholes will be
identified on the plans and reconstructed during the construction phase as part of the new
roadway improvements.
GEOTECHNICAL INVESTIGATION
Geotechnical engineering services will be provided by GMU for the three street segments
identified in the RFP. Existing as-built drawings and any previously completed geotechnical or
pavement reports provided by the City will be reviewed. Pavement corings, anticipated to total
between 28 and 32 for the three arterial roadway segments that comprise Project 2, will be
performed throughout the project limits.
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Laboratory testing will be conducted on the collected samples, and a Pavement Evaluation
Summary will be prepared. The summary will include a pavement coring location map and data
table, photographs of representative surface condition areas, laboratory test results, and
pavement rehabilitation strategy recommendations in accordance with the Caltrans Highway
Design Manual. GMU’s proposal for Project 2 is included as Appendix A. (Proposals for the
other six roadway projects can be made available upon request.)
If desired by the City, GMU has also included Optional Tasks for deflection testing and analysis,
ground penetrating radar (GPR) testing and analysis, and identification of isolated asphalt
concrete (AC) pavement repair locations. These optional tasks are included after Task 9 below
and are accounted for separately in the Fee Proposal.
Deliverables (All Task 2 Items):
Field Notes
Survey Topo Base Map, Field Survey Notes & Digital Data, Existing Records
Utility Information Matrix, Coordination Log & Records
1st Utility Notices (to City for mailing); 2nd & Final Utility Notices
Utility Potholing Exhibit and Report (if required)
Pavement Corings Summary and Map
Geotechnical Laboratory Test Results
Pavement Rehabilitation Strategy Recommendations
Tasks 3 & 5: Preliminary Engineering and Final PS&E (Project 2)
Prior to commencing with detailed design level efforts, TAIT will prepare 30% plans and review
the following items with the city:
• Preliminary roadway layouts & proposed pavement rehabilitation methods.
• Preliminary access ramp, driveway, sidewalk locations/layouts.
Following the City’s review and input on these items, TAIT will prepare 60-percent plans and
cost estimates, followed by 90-percent and 100-percent PSE&E. Based on our review of the project
limits and scope of work, the following is the anticipated page count for the design plans:
SHEET DESCRIPTION SCALE SHEET COUNT
Title Sheet N/A 1
Typical Sections, Notes & Curb Ramp Details Varies 3
Roadway Improvement Plans (Plan View) 1” = 40’ 10
Signing & Striping Plans 1” = 40’ 10
Traffic Control Plans (if required) 1” = 40’ 14
Total Sheet Count 38 Sheets
* The Residential and Collector Street Rehabilitation Projects 4 and 7 assume roadway plans will be prepared at a scale of 1” =
80’, with less detail than the arterial street projects.
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The scope of work for the design plans is expanded upon further as follows:
TITLE SHEET
The title sheet will be prepared on the City’s standard title block and will include a vicinity map,
legend, sheet index, general notes, and signature blocks for all applicable agency and project
management staff. Utility contact info and other City requested items will be added to the title
sheet as needed.
TYPICAL SECTIONS, NOTES & DETAILS
General project notes, a master list of construction notes, and typical sidewalk sections will be
included on these sheets to depict the nature of the improvements based on roadway stationing
and intersecting streets. Construction details will also be prepared for all work items that cannot
be constructed using standard plans or that do not have adequate space on the plan sheets for
the necessary elevation callouts. Additional typical details will be included for slot paving and
pavement reconstruction sections (as applicable), ADA-compliant pedestrian ramps and
driveways, and other miscellaneous construction items requiring further detailing.
ROADWAY IMPROVEMENT PLANS
Roadway rehabilitation plan sheets will be prepared for the entire project limits with a 1” = 40’
scale. Location and limits of all work items will be detailed on the plan with length/width
callouts. Existing surface utility structures will also be shown and called out for adjustments
where needed.
A stationing system will be set up along the roadway centerline and all construction work items
will be referenced to the centerline stationing system. A stationing system will be established
along the roadway centerline, and all construction work items will be referenced to this
centerline stationing system. Typical work items requiring stationing callouts include pavement
reconstruction limits, localized pavement replacement sections, utility structure adjustments,
driveways, and access ramp begin and end curb returns.
SIGNING & STRIPING PLANS
Signing and striping plans will be prepared by TJW Engineering, Inc. These plans will identify all
existing signs and pavement markings, including sign types and conditions. Existing traffic signal
loop detectors requiring replacement will also be identified. Plans will be developed at a 1” = 40’
scale and in accordance with City standards and the most recent California Manual on Uniform
Traffic Control Devices (CA-MUTCD).
Striping is assumed to be replaced in kind per the existing layout. However, as noted in the RFP,
the feasibility of adding striped or separated bike lanes will also be evaluated. The TAIT/TJW
team has completed numerous bikeway projects in which existing traffic striping was modified to
accommodate Class II, III, and IV bikeways. Traffic studies are not included as part of the current
scope of work. TJW’s proposal is included as Appendix B.
TRAFFIC CONTROL PLANS (IF REQUIRED)
If required, Traffic Control Plans will be prepared by TJW to detail the required traffic control
and phasing of operations. For most of the corridors, TJW will provide an optional two-phase
traffic control design to allow construction to proceed while maintaining traffic flow.
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There are five (5) signalized intersections within these project limits. For these locations, TJW
will prepare loop detector details for each intersection showing the locations and quantities for
replacement. The contractor would be directed to saw-cut to the adjacent pull box and splice
the new loop detector wire into the existing cable within the pull box.
For areas within Caltrans right-of-way, phased traffic control plans will be developed in
accordance with Caltrans standards and encroachment permit requirements. TJW will also
prepare the required Caltrans CEM forms for submission to TAIT, who will transmit them to
Caltrans. TJW’s proposal has been included as Appendix B. If Traffic Control Plans are not
required by the design consultant, TJW’s fees can be reduced proportionately.
SPECIFICATIONS
TAIT will prepare preliminary technical special provisions at the 60-percent and 90-percent
submittal stages, and final specifications at the 100-percent PS&E stage using the City’s
boilerplate construction specifications. Each work item will include a clear measurement and
payment clause to help prevent costly change orders during the construction phase.
The specifications will also include requirements for utility owner coordination and contact
information, as well as any additional permitting requirements. All technical specifications will
conform to the Standard Specifications for Public Works Construction (“Greenbook”), latest
edition, and the City of Diamond Bar Standard Plans and Specifications.
ENGINEER’S COST ESTIMATE
TAIT will prepare preliminary cost estimates at the 60% and 90% submittal stage, and a final cost
estimate at the 100% PS&E stage for City review and input. Unit prices will be checked against
recent City projects. Estimates will be organized in a line-item format so that bid-essential items
can be added or deleted depending on available funding.
PLAN CHECK PROCESSSING - QA/QC
Prior to submitting each package, TAIT will conduct a full QA/QC review of the submittal
package per our internal QA/QC policy. All hours associated with the QA/QC review, preparing
the submittal package, and delivering and coordinating submittal materials to the City are
included in the respective design tasks. Each submittal set will include the required number and
format of plans, specifications, estimates and reports as stated in the RFP.
Deliverables (Tasks 3 & 5):
Concept (30%) Plans; 60%, 90% & 100% Plans, Specifications and Engineer’s
Estimates
Signed Plans (Digital Copy)
Task 4: Project Planning
TAIT will work with the City to support project planning and budgeting for the ten projects
identified under the three-year Pavement Improvement Program. Project limits, pavement
rehabilitation options and recommendations, preliminary construction cost estimates, and ADA curb
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ramp locations will be evaluated and refined in coordination with City staff. Curb ramp locations and
quantities will be confirmed through staff coordination and field verification based on available budgets.
Deliverables:
Maps/Exhibits of proposed projects’ areas/limits
Preliminary Construction Cost Estimates
Task 6: Bid Phase Support
Upon approval of the PS&E and issuance of the Bid documents, TAIT will provide support to the
City during the entirety of the bidding phase. TAIT will remain available to the City and will respond to
Contractor RFIs based on the City’s request. For budgeting purposes, this task has been assumed to be
billed on a time and material basis. Additional hours and fees will be requested based on the final
number of RFIs received.
Deliverables: Response to RFI’s and Supporting Documentation for Addendums
Task 7: Construction Support & As-Builts
TAIT will attend the pre-construction meeting and provide design input and technical responses as
needed. TAIT will also review and respond to contractor submittal documents during the construction
phase. It is assumed that the City’s construction manager will serve as the primary reviewer of submittal
documents, with TAIT providing support for items requiring additional technical input. For budgeting
purposes, this task is assumed to be billed on a time-and-materials basis. Additional hours and fees will
be requested as needed based on the final number of RFIs and submittals reviewed, the level of
construction correspondence required, and the number of field meetings attended during the
construction phase.
If requested, upon completion of the project, TAIT will prepare as-built plans based on redlines
provided by the contractor and/or City inspector. This task is also assumed to be billed on a time-and-
materials basis.
Deliverables:
Response to RFIs and Submittals
Attendance at Pre-Construction Meeting, up to three (3) Construction Field Progress Meetings,
and the Post-Construction Meeting.
Supporting Documentation for Addendums and Change Orders
As-builts (hardcopy and/or PDF)
Additional / Optional Services
As noted above under Task 2, Deflection Testing and Analysis, Ground Penetrating Radar (GPR) Testing
and Analysis, and Identification of Isolated AC Repair Locations have been included as Optional Tasks
that may be beneficial for successful completion of this project. These Optional Tasks are described in
GMU’s attached Proposal and have also been accounted for separately in our Fee Proposals.
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C. EXPERIENCE AND QUALIFICATIONS
Firm Background
TAIT & Associates, Inc. (TAIT) is a
multidisciplinary, family-owned engineering firm
incorporated in the State of California. Founded in
1964 by Dr. Kenneth E. Tait, P.E., the firm has grown
from a small engineering and land surveying practice
into a full-service organization providing civil
engineering, surveying, environmental, architectural,
and construction management services.
Headquartered in Santa Ana, California, TAIT
has expanded over the past six decades to include
seven offices across the Western United States, strategically located in Corona, Sacramento, Boise,
Denver, Houston, Dallas, Oklahoma City, and Atlanta. This regional presence enables our teams to
remain closely connected to local communities while maintaining the resources of a larger, full-service
firm. For projects in and around the City of Diamond Bar, TAIT’s Santa Ana office will serve as the
primary points of contact, providing convenient proximity and responsive coordination.
The firm employs approximately 200 professional and technical staff, including licensed civil
engineers, surveyors, geologists, architects, and environmental specialists. Our corporate structure
allows for direct communication between project managers, technical leads, and executive decision-
makers, ensuring responsive, efficient project delivery.
SERVICES
TAIT’s multi-disciplined firm offers an array of consulting services to both public agencies and
private development clients. TAIT has been providing civil design and management services to local
agencies for over 61 years. Within the Engineering Group, our in-house design and management
services include:
Public Roadway Rehabilitation, Widening, and New Construction
Water Quality Design & Review (LID Plan, SWPPP, etc.)
Storm Drain Design and Hydrologic & Hydraulic Analysis
Water & Waste Water Rehabilitation & New Construction
Public Building Site Improvements
Public Parking Facilities Site Improvements
Public Improvement & Private Development Design Plan Checking
Structural Design & Architectural Services
UST/AST Fuel Tank Environmental Services
Construction Management, Inspection & Surveying Services
Design and Construction Survey Services
STRENGTHS - WHAT SETS US APART
TAIT has built a reputation for successfully managing projects from concept to completion. We
have specific expertise in public infrastructure development, land development, natural resource
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preservation, and environmental management. A key component of TAIT’s strength is based upon our
ability to focus on solutions that are cost-effective. We understand the tight time and money
constraints under which our clients frequently operate and strive to provide unique solutions that allow
our cclients’ projects to be completed on time and within budget.
Key Personnel
TAIT’s proposed team for the City of is composed of experienced professionals with proven
expertise in municipal infrastructure design, roadway rehabilitation, storm drain and utility
improvements, and PS&E preparation for public agencies throughout Southern California. Each team
member has a strong history of delivering projects efficiently, on schedule, and within budget.
Detailed resumes, including brief bios, years with TAIT, education, licenses, and up to three
relevant projects with roles, scope, and client references, are included in the Resumes section of this
proposal.
Name Classification/Designation
Licenses/
Registrations
Years of
Experience
Time
with
Firm
Jacob Vandervis, P.E. Principal-in-Charge CA No. C46301 39 28
Dennis Postler, P.E. Project Manager CA No. C46106 38 3
David Sloan, P.E. QA/QC Manager CA No. C82595 18 11
Todd Broussard, P.E., QSD/P Sr. Professional Engineer CA No. C57144 38 12
Samantha Wohlfarth, P.E. Professional Engineer (Utility) CA No. C86126 13 13
Daniela Malott, P.E. Professional Engineer (Drainage) CA No. C86581 13 8
Christopher Engelbach, E.I.T. Project Engineer (Roads) E.I.T. 16 9
Aaron Richter, E.I.T. Project Engineer (Roads) E.I.T. 7 7
Michael Furlong, PLS Surveyor CA PLS No. 8899 46 6
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Project References
TAIT understands that the City’s FY 25/26 Civil Engineering Design Services Program will extend over the
course of approximately three years and will require consistent engineering support through multiple
design phases and task assignments. Our team is structured to serve as an extension of City staff,
providing responsive, on-call-style service as the program progresses.
TAIT has an extensive history of working with public agencies across Southern California in a similar
capacity, providing design, surveying, and construction support services for roadway, utility, and ADA
improvement programs. The following projects demonstrate our proven ability to deliver multi-year,
citywide rehabilitation programs involving residential and arterial streets, ADA curb ramp compliance,
and coordination with multiple utilities and agencies.
FIGUEROA STREET PAVEMENT REHABILITATION
Carson, CA
TAIT was selected by the City of Carson to provide design engineering,
surveying, and geotechnical engineering services for Figueroa Street from
Carson Street to Lomita Boulevard. The project included nearly 2 miles of
arterial collector roadway rehabilitation on Figueroa Street which is a 4-
lane arterial roadway with raised and painted medians. The scope of
work included field identification and design of over 770,000 SF of AC
Pavement Mill & Overlay, and over 184,000 SF of full-depth pavement
Digouts and Reconstruction. This project included surveying, civil
engineering and geotechnical engineering for 1.8 miles of an arterial
collector roadway. The roadway rehabilitation methods included full-
width grind and ARHM overlay, and full-depth roadway section removal
and reconstruction where needed. The project also included concrete
pavement and cross-gutters reconstruction, repair of damaged sidewalks,
pedestrian ramps, driveways and curbs & gutters to meet Americans with
Disabilities Act (ADA) requirements, identification and
adjustments/protections of existing utility facilities, signing & striping
improvements, and tree removals and replacements based on safety
hazards. Additionally, the project included permit coordination for a BNSF
Railroad crossing and application for work within their right-of-way.
Relevance to City of Diamond Bar:
This project is directly comparable to the City of Diamond Bar’s proposed
FY 25/26 program. It involved the same combination of roadway
rehabilitation, ADA curb ramp compliance, and arterial street
improvements. The work required comprehensive field investigation,
design development, and interagency coordination, demonstrating TAIT’s
ability to manage large-scale, multi-discipline projects efficiently. The
delivery method and scope of services reflect the on-call style of support
that TAIT will provide to the City of Diamond Bar throughout the three-
year duration of this program.
Reference Contact:
Gilbert Marquez, PE, City
Engineer,
(310) 952-1700
gmarquez@carsonca.gov
Client:
City of Carson
Construction Cost:
$8.3 M
Design Cost:
$132K
Project Dates
Design: 2023-2024
Construction: 2024-2025
Project Team:
PIC: Jacob Vandervis
PM: David Sloan
QA/QC: Dennis Postler
PE: Aaron Richter
Additional Projects:
• 213 Street Pavement Rehab
• MLK Jr. Street Pavement
Rehab and Reconstruction
• Lomita Boulevard
Reconstruction and
Drainage Impts
• Central Ave/University Drive
Traffic Signal Impts
• Carson Street Left Turn
Lanes Analysis
• Main Street Pavement
Rehab
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IRVINE CENTER DRIVE PAVEMENT REHABILITATION
Irvine, CA
TAIT was selected by the City of Irvine to provide civil engineering and
surveying on the Irvine Center Drive Pavement Rehabilitation Project from
Pacifica to Lake Forest Drive. The project limits include a total of 2 miles of
arterial roadway rehabilitation on Irvine Center Drive and a 3 lane arterial
roadway with bike lanes extending through the City of Irvine. The project
includes the design of pavement rehabilitation strategies as well as the
identification and replacement of non-ADA compliant curb ramps, sidewalk,
replacement of damaged curb and gutter, coordination with IRWD and
Caltrans for encroachment approvals at I-405 Overpass, and the
identification and adjustment/protection of utility facilities throughout the
project limits. Extensive coordination was conducted with the City to verify
that the pavement replacement scenario is in line with the proposed and
revised grades.
Relevance to City of Diamond Bar:
This project is directly aligned with the City of Diamond Bar’s FY 25/26
program, which involves arterial and collector roadway rehabilitation and
ADA curb ramp improvements. The project demonstrates TAIT’s experience
with multi-jurisdictional coordination, pavement design, and compliance
with ADA and Caltrans standards. TAIT’s familiarity with implementing
complete rehabilitation strategies and managing field coordination for
complex arterial corridors ensures the firm’s readiness to deliver the City’s
program efficiently and effectively.
Reference Contact:
Tim Callahan, PE, Senior Civil
Engineer,
(949) 482-8431
tcallahan@cityofirvine.org
Client:
City of Irvine
Construction Cost:
$8 M
Design Cost:
$600K
Project Dates
Design: 2023
Construction: 2024
Project Team:
PIC: Jacob Vandervis
PM: David Sloan
QA/QC: Dennis Postler
PE: Chris Engelbach
Additional Projects:
• Cadence Bike Lanes
• Campus Drive
Rehabilitation
• Cultural Terrace Project
at the Great Park
• Irvine Center Drive
Pavement Rehabilitation
• Phantom Bike Lanes
• South Yale Corridor Bike
Lanes
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 14
LAS PALMAS AREA STREET REHABILITATION AND UTILITY REPAIRS
Fullerton, CA
TAIT was selected by the City of Fullerton to provide design engineering,
surveying, and construction staking services for the Las Palmas Area Street
Rehabilitation on two residential collector roadways and five cul-de-sacs.
The roadway improvements portion of this project included surveying, civil
engineering, and construction staking for a half mile (73,750 square feet) of
rural residential collector full-depth pavement reclamation, three quarters of
a mile (103,800 square feet) of residential collector full-width grind and
overlay with full pavement replacements where needed, and a half mile
(148,900 square feet) of residential cul-de-sacs slurry seal with full pavement
replacements where needed. The project also included concrete
reconstruction, repair of damaged sidewalks, driveways and curbs & gutters
to meet Americans with Disabilities Act (ADA) requirements, signing &
striping improvements, and identification and adjustments/protections of
existing utility facilities.
Relevance to City of Diamond Bar:
This project is directly aligned with the City of Diamond Bar’s FY 25/26 Civil
Engineering Design Services program, which includes residential and
collector street rehabilitation and ADA curb ramp improvements. The Las
Palmas project demonstrates TAIT’s ability to deliver neighborhood-scale
street rehabilitation projects involving multiple pavement treatment
methods, ADA compliance upgrades, and utility coordination. The services
provided reflect the same comprehensive, on-call-style support that TAIT will
provide to the City of Diamond Bar over the multi-year duration of this
program.
Reference Contact:
Melissa Rendon, PE,
Associate Engineer,
(714) 738-6886
Melissa.Rendon@cityoffuller
ton.com
Client:
City of Fullerton
Construction Cost:
$2.8 M
Design Cost:
$284K
Project Dates
Design: 2023-2024
Construction: 2024
Project Team:
PIC: Jacob Vandervis
PM: Dennis Postler
QA/QC: David Sloan
PE: Mel Anacion
Additional Projects:
• Jacaranda Neighborhood
Sewer Replacement &
Rehabilitation Project
• Juanita Cook Trail
• Jacaranda Neighborhood
Rehabilitation & Sewer
Replacement Project
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 15
Additional Project References
JACARANDA NEIGHBORHOOD PAVEMENT REHABILITATION & SEWER REPLACEMENT
PROJECT
Fullerton, CA
TAIT was selected by the City of Fullerton to provide civil engineering services
for the Jacaranda Neighborhood Pavement Rehabilitation and Sewer Main
Replacement Project. The project was located in a historic neighborhood in
the City of Fullerton that included over a mile of residential roadway
rehabilitation and 2,700 linear feet of sewer main replacement within the
neighborhood surrounding Jacaranda Place from the western cul-de-sac to
Malden Avenue. In addition to roadway reconstruction and grind and overlay
operations, the roadway component of the project included the removal and
replacement of over 1.5 miles of old, deteriorated, and uneven curb and
driveways throughout the neighborhood with new variable height curb and
gutter in order to engineer and define the roadway drainage conditions within
the neighborhood. Due to the historic and unique nature of the
neighborhood, the curb heights and flowline were carefully profiled in order to
improve the drainage conditions while also joining the existing pavement.
In addition to the roadway improvements, TAIT was also tasked with the
abandonment of two old sewer siphon systems and the combination and
construction of a single master neighborhood sewer siphon along with the
removal and replacement of 2,700 linear feet of existing 6” VCP with new 8”
VCP sewer. The sewer siphon was design to convey sewer flows under an
existing Orange County Flood Control Channel and required the design of a
double barrel sewer siphon that was installed via jack and bore method.
Relevance to City of Diamond Bar:
This project demonstrates TAIT’s ability to manage combined roadway
rehabilitation and underground utility replacement projects within established
residential neighborhoods. Similar to the City of Diamond Bar’s FY 25/26
program, the work required detailed field assessment, complex grading and drainage design, and
coordination with multiple agencies. TAIT’s approach to preserving neighborhood characteristics while
improving drainage and accessibility mirrors the methods proposed for the City of Diamond Bar’s
residential and collector street rehabilitation and ADA improvements.
Reference Contact:
Jose Medina, Associate
Engineer, (714) 738-6863
JoseM@cityoffullerton.com
Client:
City of Fullerton
Construction Cost:
$2.4 M
Design Cost:
$132K
Project Dates
Design: 2019-2020
Construction: 2020
Project Team:
PIC: Jacob Vandervis
PM: David Sloan
QA/QC: Todd Schmieder
PE: Chris Engelbach
Additional Projects:
• Las Palmas Area Street
Rehabilitation and Utility
Repairs
• Juanita Cook Trail
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 16
2020 CITYWIDE STREET RESURFACING PROJECT
Stanton, CA
This current under construction project includes two separate contracts in
which TAIT was selected by the City of Stanton to provide civil engineering
and surveying on a citywide residential and arterial design project which
included the design of the following three project’s rehabilitation methods:
• Contract 1: Plan & Profile for 0.32 miles of full depth removal and
reconstruction
• Contract 1: Plans for 1.5” Grind and FRAC Overlay
• Contract 2: Plans for 1.6 Million SF of RAP Slurry Overlay
The project encompassed a total of 0.32 miles of removal and reconstruction,
0.72 miles of 1.5” grind and FRAC overlay as well as 1.6+ million square feet
of RAP Slurry Overlay. The project included the design of pavement
rehabilitation strategies as well as the identification and replacement of non-
ADA compliant curb ramps, sidewalk, replacement of damaged curb and
gutter, removal and replacement of slotted cross gutters, and the
identification and adjustment/protection of utility facilities.
Relevance to City of Diamond Bar:
This project is directly aligned with the City of Diamond Bar’s FY 25/26 Civil
Engineering Design Services program, which includes residential and arterial
roadway rehabilitation and ADA curb ramp improvements. The Stanton
project demonstrates TAIT’s ability to manage multiple concurrent
rehabilitation contracts, apply various pavement treatment methods, and
coordinate effectively with City staff for large-scale, citywide improvement
programs. The structure and scope of this project reflect the same on-call-
style service model that TAIT will bring to the City of Diamond Bar’s multi-
year program.
Reference Contact:
Allan Rigg, PE AICP, Public
Works Director,
7800 Katella Ave,
Stanton, CA
(714) 890-4203
arigg@ci.stanton.ca.us
Client:
City of Stanton
Construction Cost:
$1.5 M
Design Cost:
$74,942
Project Dates:
Design: 2019
Construction: 2020-21
Project Team:
PIC: Jacob Vandervis
PM: David Sloan
QA/QC: Jake Vandervis
Additional Projects:
• Garden Grove Connector
Sewer Replacement
• 2020 Citywide Street
Resurfacing Project
• 2019 Citywide Street
Resurfacing Project
• Overlay, Alley
Reconstruction, and
Cerritos Ave. Widening
Project
• Stanton Park Outdoor
Fitness Area
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 17
EL TORO ROAD MEDIAN & PAVEMENT IMPROVEMENTS
Lake Forest, CA
TAIT was selected by the City of Lake Forest to provide civil engineering,
surveying, and geotechnical engineering on the El Toro Median & Pavement
Improvement Project from the I-5 Freeway at the south to Marguerite
Parkway at the north. The project limits included a total of 5 miles of arterial
roadway rehabilitation on Portola Parkway which is a 4 to 6 lane arterial
roadway with bike lanes, middle turn lanes and intermittent medians. The
project included the design of new, landscaped medians between Jeronimo
Road and Trabuco Road, as well as pavement rehabilitation along the entire
project limits. The project also included the identification and replacement
of non-ADA compliant curb ramps, sidewalk, replacement of damaged curb
and gutter, signage and striping and the identification and
adjustment/protection of utility facilities. This project also included
incorporation of the design improvements for the Jeronimo Road Widening
project which was also designed by TAIT and included right of way dedication
and retaining wall design. This project was a phased for construction for the
median improvements and Jeronimo.
Relevance to City of Diamond Bar:
This project is directly aligned with the City of Diamond Bar’s FY 25/26 Civil
Engineering Design Services program, which includes arterial roadway
rehabilitation, ADA curb ramp upgrades, and phased implementation. The
El Toro project demonstrates TAIT’s ability to manage large-scale arterial
improvements involving multiple roadway features, including medians,
pavement reconstruction, and ADA compliance. It also reflects TAIT’s
experience coordinating complex phasing and integrating adjacent
improvement projects, mirroring the City’s anticipated multi-year, on-call-
style program.
Reference Contact:
Doug Erdman, PE, Director of
Public Works,
100 Civic Center Dr.
Lake Forest, CA 92630
(949) 282-5233
derdman@lakeforestca.gov
Client:
City of Lake Forest
Construction Cost:
$14 M
Design Cost:
$1 M
Project Dates
Design: 2020-2024
Construction: 2025
Project Team:
PIC: Jacob Vandervis
PM: David Sloan
QA/QC: Dennis Postler
Geotech: GMU
Additional Projects:
• Portola Parkway
Resurfacing
• Citywide Traffic Signal
Upgrade Project
• Packer Place Linear Park
Drainage Improvements
• Ascension Median
Acceleration Lane Project
• PPLT Traffic Signal
Improvements
• Glenn Ranch Road Rehab.
• Jeronimo & El Toro
Widening
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 18
ANNUAL STREET RESURFACING AND PAVEMENT REHABILITATION PROGRAM
Manhattan Beach, CA
TAIT was selected by the City of Manhattan Beach to provide civil
engineering and surveying services for the City’s Annual Street Resurfacing
and Pavement Rehabilitation Program. The project included pavement
rehabilitation design for approximately two miles of local and arterial
streets, including Manhattan Beach Boulevard from Sepulveda Boulevard to
Pacific Avenue. Improvements consisted of mill and overlay and localized
reconstruction, ADA curb ramp and driveway upgrades, limited curb and
gutter repair, and new signing and striping. TAIT coordinated closely with
the City, Southern California Edison (SCE), Southern California Gas Company
(SoCalGas), California Water Service (Cal Water), AT&T, Frontier
Communications, and Spectrum to identify and protect existing utility
facilities, conduct field investigations and pavement coring, and prepare
plans, specifications, and estimates for construction.
Relevance to City of Diamond Bar:
This project is directly aligned with the City of Diamond Bar’s FY 25/26 Civil
Engineering Design Services program, which includes residential and arterial
roadway rehabilitation and ADA curb ramp improvements. The Manhattan
Beach program reflects TAIT’s experience managing citywide resurfacing
efforts, coordinating with multiple utilities and agencies, and developing
complete PS&E packages for construction. The program structure and scope
mirror the multi-year, on-call-style approach TAIT will provide to the City
of Diamond Bar.
Reference Contact:
Gilbert Ramos, Associate
Engineer
(310) 802-5362
gramos@manhattanbeach.gov
Client:
City of Manhattan Beach
Construction Cost:
TBD ($3.5M Est.)
Design Cost:
$332K
Project Dates
Design: 2024-Current
Construction: 2026
Project Team:
PIC: Jacob Vandervis
PM: Dennis Postler
QA/QC: David Sloan
PE: Aaron Richter
Additional Projects:
• S. Rowell Avenue Sidewalk
Gap Closure Project
• Lot 3 Interim Parking Lot
Design
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 19
CDBG CURB RAMPS IMPROVEMENTS
Laguna Hills, CA
TAIT was selected by the City of Laguna Hills to provide civil engineering and
surveying services for the Community Development Block Grant (CDBG)
Curb Ramp Replacements project. The project area was generally bounded
by La Paz Road, Paseo de Valencia, and Cabot Road and included the
replacement design of 42 curb ramps to bring pedestrian access routes into
compliance with current ADA standards.
TAIT performed field reconnaissance, topographic surveying, and base
mapping to evaluate existing site conditions and determine where standard
curb ramp details could be utilized versus where custom designs were
required for steeper grades or constrained conditions. Improvements
included the design of new curb ramps, localized sidewalk, curb, and gutter
reconstruction, and coordination with the City for right-of-way verification
and grading adjustments.
Utility coordination was conducted with Southern California Edison (SCE),
Southern California Gas Company (SoCalGas), California Water Service (Cal
Water), AT&T, Frontier Communications, and Spectrum to verify existing
subsurface conditions and avoid potential conflicts during construction. TAIT
prepared plans, specifications, and engineer’s estimates in accordance with
City and CDBG standards, providing complete design documents to support
the City’s bid and construction process.
Relevance to City of Diamond Bar:
This project is directly aligned with the City of Diamond Bar’s FY 25/26 Civil
Engineering Design Services program, particularly the residential
neighborhood ADA curb ramps improvement component. The project
demonstrates TAIT’s ability to deliver comprehensive ADA design solutions
under federally funded programs, incorporating detailed field evaluation,
custom ramp design, and multi-agency utility coordination. TAIT’s familiarity
with CDBG-funded accessibility projects and compliance with both ADA and
municipal standards supports the City’s goal of achieving safe and accessible
pedestrian routes throughout its neighborhoods.
Reference Contact:
Raul Rodriguez, PE
(343) 707-2659
rrodriguez@lagunahillsCA.gov
Client:
City of Laguna Hills
Construction Cost:
$250,000
Design Cost:
$52,600
Project Dates
Design: 2025
Construction: 2026
Project Team:
PIC: Jacob Vandervis
PM: Dennis Postler
QA/QC: David Sloan
PE: Aaron Richter
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FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 20
D. TEAM ORGANIZATION STRUCTURE
Organization Chart
The chart provided on the following page summarizes our key personnel and their
organizational structure for this contract.
QA/QC Manager
David Sloan, P.E.
Principal in Charge
Jacob Vandervis, P.E.
TAIT Engineering Design & Survey Support Staff
Other Technical Support
Surveyors
Michael Furlong, P.L.S
Project Manager
Dennis Postler, P.E.
Sub-Consultants
GMU – Geotech/Pavement
TJW – Traffic Engineering
Roadway Engineering
Christopher Engelbach, E.I.T.
Aaron Richter, E.I.T.
Water Quality/Drainage
Samantha Wohlfarth, P.E.
Daniela Malott, P.E.
Sr. Professional Engineer
Todd Broussard, P.E., QSD/P
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 21
Key Personnel Qualifications
TAIT employs a diverse team of Professional Engineers, QSP & QSD Certified Engineers,
Professional Land Surveyors, Licensed Architects, Construction Managers, Construction Inspectors,
and a skilled bench of Design and Project Engineers. We pride ourselves on our engineering diversity,
and actively train our in-house staff with weekly design seminars on topics such as ADA compliance,
Water Quality Design and Compliance, Civil 3D Design Best Practices, and Water, Waste Water, and
Storm Drain Design Principals.
The key personnel for the TAIT Team are listed below, including their positions, licenses, and
years of experience. Each has provided design services directly for local agencies within the past five
years. Resumes and detailed qualifications are included in our Appendix.
Name Classification/Designation
Licenses/
Registrations
Years of
Experience
Time
with
Firm
Jacob Vandervis, P.E. Principal-in-Charge CA No. C46301 39 28
Dennis Postler, P.E. Project Manager CA No. C46106 38 3
David Sloan, P.E. QA/QC Manager CA No. C82595 18 11
Todd Broussard, P.E., QSD/P Sr. Professional Engineer CA No. C57144 38 12
Samantha Wohlfarth, P.E. Professional Engineer (Utility) CA No. C86126 13 13
Daniela Malott, P.E. Professional Engineer (Drainage) CA No. C86581 13 8
Christopher Engelbach, E.I.T. Project Engineer (Roadway) E.I.T. 16 9
Aaron Richter, E.I.T.
Project Engineer
(Roadway/Site/Infrastructure) E.I.T. 7 7
Michael Furlong, PLS Surveyor CA PLS No. 8899 46 6
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FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 22
E. ESTIMATED LABOR HOURS
Based on the City’s responses, each project’s design fee has been prepared under the
assumption that each project will have its own Plans, Specifications, and Estimate (PS&E) package.
Should the City choose to combine any of the projects into a single or consolidated PS&E package for
bidding and award purposes, TAIT’s proposed fees may be reduced proportionally to reflect the
associated efficiencies.
Estimated Labor Hours are included in our attached Detailed Project Fee Proposals for each
project. Hours are broken down and summarized for each task and by proposed personnel
classification, with a total number of hours included in each table. The following Labor Hours are for
Project No. 2 (Arterial Street Rehabilitation of Brea Canyon Road: Diamond Bar Blvd to Pathfinder Rd;
Brea Canyon Road: Pathfinder Rd to Washington Ave; and Diamond Bar Boulevard: SR-60 Off-Ramp to
City Limit), and are intended to serve as a representative sample of our Labor Hours for all 10 Projects.
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 23
F. RESUMES AND QUALIFICATIONS OF PROPOSED PERSONNEL
Jacob Vandervis, PE
PRINCIPAL-IN-CHARGE
Mr. Vandervis currently serves as a Vice President/Chief Operations Officer in
TAIT’s Corporate Office in Santa Ana. In addition to his management duties, he
acts as the primary point of contact for several national retail and residential
developers. Mr. Vandervis is a licensed civil engineer with over 39 years of
experience with land development projects in the western United States. His
areas of expertise include site design, grading design, drainage studies, water
pollution control plans, erosion & sediment control plans, as well as street
improvement plans. He is experienced in site design of all sizes for commercial
development, involved in preliminary design to develop cost estimates & due
diligence packages, as well as experienced in the entitlement phase of projects.
His surveying experience includes the preparation of ALTA and topographic
surveys, parcel maps, record of survey and legal descriptions. He is a certified
Qualified SWPP Developer (QSD), Certified Development, Design & Construction
Professional (CDP) and Certified Retail Property Executive (CRX). Selected
Project Experience:
Irvine Center Drive Pavement Rehab., City of Irvine, Principal-in-Charge, 2023;
Client Reference: Tim Callahan, PE, Senior Civil Engineer, (949) 482-8431
tcallahan@cityofirvine.org
This project includes civil engineering design of 2 miles of federally-funded
arterial roadway rehabilitation. The roadway rehabilitation methods include
full-width grind and overlay. The project also includes the identification and
replacement of non-ADA compliant curb ramps, driveways and sidewalk, the
identification and adjustment/protection of utility facilities, signing & striping
and phasing plans, and coordination/permitting with Caltrans and IRWD.
2020 Local Paving Project, City of Seal Beach Principal-in-Charge & QA/QC
Manager, 2020-2021; Client Reference: Iris Lee, PE, Public Works Director,
(562) 431-2527 Ext. 1322, ilee@sealbeachca.gov
Principal-in-Charge and QA/QC Manager of the civil engineering design services on several residential
roadways in the College Park neighborhood. The project limits include a total of 0.83 miles of residential
roadway uniform and variable depth grind and overlay on 2 lane residential streets.
Jacaranda Neighborhood Rehabilitation & Sewer Replacement Project, City of Fullerton, Principal-in-
Charge, 2019-2020; Client Reference: Jose Medina, Associate Engineer, (714) 738-6863,
JoseM@cityoffullerton.com
Principal-in-Charge for the Jacaranda Neighborhood Pavement Rehabilitation and Sewer Main
Replacement Project. The project was located in a historic neighborhood in the City of Fullerton that
included over a mile of residential roadway rehabilitation and 2,700 linear feet of sewer main
replacement within the neighborhood surrounding Jacaranda Place.
Education
B.S. -- Civil Engineering
California State University,
Long Beach
Year of TAIT Team
Enlistment
1997
Total Experience
39
Certifications
Registered Professional
Engineer, Civil – California,
Oregon, Arizona, Utah,
Nevada, North Dakota,
Washington, Hawaii, and
Alaska.
Professional Engineer
California No. C46301
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FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 24
David Sloan, PE
QA/QC/ VICE PRESIDENT OF ENGINEERING
As a Project Manager, David has provided detailed designs on arterial roadways,
conducted utility coordination for major relocations on high-profile projects and
assisted in coordination and construction management efforts on multiple
projects throughout the Southern California region. Having served as a
Community Coordinator for several high-profile projects, David is an effective
communicator and actively stays in contact with his clients throughout the life
of his projects. David has also been responsible for multiple public work
construction management projects, which brings value to design projects by
fully understanding the methods and costs of construction projects. Selected
Project Experience:
Irvine Center Drive Pavement Rehab., City of Irvine, Project Manager, 2023
Client Reference: Tim Callahan, PE, Senior Civil Engineer, (949) 482-8431
tcallahan@cityofirvine.org
This project includes civil engineering design of 2 miles of federally funded
arterial roadway rehabilitation. The roadway rehabilitation methods include
full-width grind and overlay. The project also includes the identification and
replacement of non-ADA compliant curb ramps, driveways and sidewalk, the
identification and adjustment/protection of utility facilities, signing & striping
and phasing plans, and coordination/permitting with Caltrans and IRWD.
2020 Citywide Street Resurfacing Project, City of Stanton, Project Manager,
2019-2021; Client Reference: Allan Rigg, PE AICP, (714) 890-4203,
arigg@ci.stanton.ca.us
As Project Manager, David provided provide civil engineering and surveying on a
citywide residential and arterial design project which included the design of the
following three project’s rehabilitation methods: Contract 1: Plan & Profile for 0.32
miles of full depth removal and reconstruction; Contract 1: Plans for 1.5” Grind and
FRAC Overlay; and Contract 2: Plans for 1.6 Million SF of RAP Slurry Overlay. The
project encompassed a total of 0.32 miles of removal and reconstruction, 0.72 miles
of 1.5” grind and FRAC overlay as well as 1.6+ million square feet of RAP Slurry
Overlay.
Jacaranda Neighborhood Rehabilitation & Sewer Replacement Project, City of
Fullerton, Project Manager, 2019-2020, Client Reference: Jose Medina, Associate
Engineer, (714) 738-6863, JoseM@cityoffullerton.com
As Project Manager, David provided civil engineering services for the Jacaranda
Neighborhood Pavement Rehabilitation and Sewer Main Replacement Project. The
project was located in a historic neighborhood in the City of Fullerton that included
over a mile of residential roadway rehabilitation and 2,700 linear feet of sewer main
replacement within the neighborhood surrounding Jacaranda Place from the
western cul-de-sac to Malden Avenue.
Education
BS Civil Engineering – Tau
Beta Pi Honor Society &
Chi Epsilon, University of
Southern California
BS Physical Science, Biola
Year of TAIT Team
Enlistment
2014
Total Experience
18
Certifications
Professional Engineer
California No. 82595
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FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 25
Abridged List of David’s Project Experience:
• Multiple Roadway Improvements, City of Lake Forest
• Multiple Roadway Improvements, City of Irvine
• Alondra Blvd Resurfacing, City of Bellflower
• Citywide Comprehensive Drainage Study for the City of Diamond Bar
• Peterson Park Water Quality & Grading Improvements for the City of Diamond Bar
• Sunset Crossing Park Preliminary Grading & Grant Funding for the City of Diamond Bar
• Reagan & Peterson Park Parking Lot Expansion Project for the City of Diamond Bar
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Page | 26
Dennis Postler, PE
PROJECT MANAGER/DIRECTOR OF PUBLIC INFRASTRUCTURE
Dennis Postler is Director of Public Infrastructure of TAIT & Associate’s
Engineering Division in Santa Ana, CA. He is responsible for supervising staff at
TAIT on the preparation of public infrastructure projects. As a Project Manager,
Dennis has been involved with local roadway and federally funded arterial
roadways design and management, public utility design and relocation, traffic
design, and park development and design for over 38 years. In addition to
managing and designing public capital improvement projects, Dennis has
functioned as consulting city engineer to municipalities, has provided general
city engineering services and managed plan reviews for developments, land
division, stormwater, and final construction. He also provides budgeting
assistance; facility planning; sanitary sewer, water main, and storm sewer
master planning; special assessments assistance; and QA/QC review and
construction management. These services enable Dennis and his staff to
efficiently assist public clients with their engineering and public works needs by
being an extension of their staff. His work for both the public and private
sectors has allowed Dennis to gain invaluable experience in understanding and
appreciating what both sides bring to the table. Selected Project Experience:
Figueroa Street Rehabilitation, City of Carson, Project Manager, 2023-24;
Client Reference: Gilbert Marquez, PE, City Engineer, (310) 952-1700
gmarquez@carsonca.gov
This project includes surveying and civil engineering for 1.8 miles of an arterial
collector roadway. The roadway rehabilitation methods will include full-width
grind and overlay, and full pavement replacement and reconstruction where
needed. The project also includes concrete reconstruction, repair of damaged
sidewalks, driveways and curbs & gutters to meet Americans with Disabilities
Act (ADA) requirements, signing & striping improvements, and tree removal and
replacement based on safety hazards.
Annual Street Resurfacing Project, City of Manhattan Beach, Project Manager,
2024-Present; Client Reference: Gilbert Ramos, Associate Engineer, (310) 802-
5362, gramos@manhattanbeach.gov
Dennis served as Project Manager for the City of Manhattan Beach’s Annual
Street Resurfacing and Pavement Rehabilitation Program, providing civil
engineering and surveying services for approximately two miles of local and
arterial streets, including Manhattan Beach Boulevard from Sepulveda
Boulevard to Pacific Avenue. Improvements included pavement rehabilitation
design consisting of mill & overlay with localized reconstruction, full
reconstruction, ADA curb ramp and driveway upgrades, limited curb and gutter
repair, and new signing and striping. TAIT coordinated closely with the City and
utility agencies including SCE, SoCalGas, Cal Water, AT&T, Frontier
Communications, and Spectrum to identify and protect existing facilities,
Education
B.S. – Civil Engineering,
University of Minnesota
Year of TAIT Team
Enlistment
2023
Total Experience
38
Certifications
Professional Engineer:
California No. C46106
Minnesota No. 22011
Wisconsin No. 28521-6
Michigan No. 6201068766
Associations
American Public Works
Association (APWA)
American Council of
Engineering Companies
(ACEC)
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FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 27
perform field investigations and pavement coring, and prepare plans, specifications, and estimates for
construction.
Las Palmas Area Street Rehabilitation, City of Fullerton, Project Manager, 2024; Client Reference:
Melissa Rendon, PE, Assistant Engineer, (714) 738-6886, Melissa.Rendon@cityoffullerton.com
This project includes surveying and civil engineering for a half mile of rural residential collector full-
depth pavement reclamation, three quarters of a mile of residential collector full-width grind and
overlay and full pavement replacement where needed, and a half mile of residential cul-de-sacs slurry
seal with full pavement replacement where needed. The project also includes concrete reconstruction,
repair of damaged sidewalks, driveways and curbs & gutters to meet Americans with Disabilities Act
(ADA) requirements, signing & striping improvements, and removal and replacement and CIPP lining of
damaged sanitary sewer and storm drain utilities.
Abridged List of Dennis’ Recent Project Experience:
• CDBG Curb Ramp Improvements, City of Laguna Hills
• 213th Street Pavement Rehabilitation, City of Carson
• Pavement Rehabilitation at Multiple Sites, Orange County Water District
• MLK Jr Street & Parking Lot Reconstruction, City of Carson
• Lomita Blvd Reconstruction, City of Carson
• Main Street Pavement Rehabilitation, City of Carson
• Park Ave & PCC Alleys Reconstruction, City of Newport Beach
• Central Ave & University Drive Traffic Signal Modifications, City of Carson
• Citywide Sanitary Sewer Lining Rehab, City of Gardena
• Cadence and Phantom Bike Lane Improvements, City of Irvine
• 3 Parks & Parking Lots Improvements, City of Whittier
• 2023 Local Paving Improvements, City of Seal Beach
• Von Karman Blvd Pavement Rehabilitation, City of Newport Beach
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 28
M. Todd Broussard, P.E., QSD/P
SENIOR PROFESSIONAL ENGINEER
In addition to 17 years of private development experience (11 of those with
TAIT), Mr. Broussard has over 21 years of municipal design and project
management experience as Principal Civil Engineer with the City of Huntington
Beach Public Works Department, overseeing an annual Capital Improvement
Program budget of approximately $25 million per annum. Project specific
responsibilities included street improvements, wastewater, stormwater, and
special projects outside of the public right of way for the City as detailed below.
Selected Project Experience:
Rowell Street Improvements, City of Manhattan Beach, Project Manager,
2022-2023; Client Reference: Marzena Laskowska, PE, (310) 802-5325,
mlaskowska@manhattanbeach.gov
As Project Manager/Professional Engineer, Todd oversaw PS&E construction
documents for a sidewalk gap closure project fronting an active school site. The
project also included bringing existing area curb ramps into ADA compliance.
TAIT’s services also included surveying to support the project.
Baldwin Park City Yard Improvement Project, City of Baldwin Park, Project
Manager, 2021-2023; Client Reference: Sam Gutierrez
Director of Public Works, (626) 960-4011x460, sgutierrez@baldwinpark.com
As Project Manager, TAIT provided in house services, including surveying,
engineering, architectural, and fuel station design, for improvements to their
City Yard. Those improvements include a total gut and reconfiguration of the
main Administration building, as well as improvements to the warehouses and
garage and site configuration.
Parnell Park Reconfiguration Project, City of Whittier, Project Manager, 2022-
2023; Client Reference: Kyle Cason, Director of Public Works, (562) 567-9511,
kcason@cityofwhittier.org
As Project Manager, Todd oversaw PS&E construction documents for demolition
of all existing facilities to support a new soccer complex, practice fields,
basketball court, playground, splash pad, and other amenities. TAIT’s services
also included surveying to support the project.
Education
Master of Public
Administration, California
State University
B.S. -- Civil Engineering,
University of Louisiana,
Lafayette
Year of TAIT Team
Enlistment
2021
(1989-1997) Previous
Total Experience
38
Certifications
Professional Engineer
California No. C57144
CWEA Grade IV
Wastewater Collection
Associations
American Public Works
Association
American Society of Civil
Engineers
California Water
Environment Association
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 29
Samantha A. Wohlfarth, P.E.
PROFESSIONAL ENGINEER (SITE/INFRASTRUCTURE)
Ms. Wohlfarth has professional experience that includes the preparation of
grading plans, water main replacement plans, storm drain plans and drainage
reports, sewer plans, cost estimates and storm water management reports for
public and private developments throughout Southern California, Western
Washington, and North Dakota. Her project experience also includes the
preparation of storm water quality reports such as SWPPP, WQMP, SUSMP and
LID as mandated by the state and local municipalities. Ms. Wohlfarth has
technical knowledge with multiple software programs including AutoCAD 2014,
Civil 3D, Land Desktop, Microstation, GeoPak, WWHM2012, RetainPro, and
additional specialty programs. Selected Project Experience:
Glendale FY2021-2022 Water Main Replacement Projects Glendale Water &
Power, Project Manager, 2021-2023; Client Reference: Coleman Johnson, (818)
551-6910, cjohnson@glendaleca.gov
TAIT was contracted to provide design build services with JDC for various
neighborhood water main replacement projects. The project required the
replacement of approximately 15,000 LF of existing water pipe within 20 local
streets, while working in residential streets and incorporating a design that
would work with many existing utilities. The process included obtaining DDW
approvals for many of the segments.
Pipeline Management Program, FY2019-2020 Phase 1 Project
Glendale Water & Power, Project Manager/Engineer, 2019-2020; Client
Reference: Coleman Johnson, (818) 551-6910, cjohnson@glendaleca.gov
TAIT was contracted to provide design build services with JDC for various
neighborhood water main replacement projects. The project required the
replacement of approximately 11,535LF of existing ACP water pipe within 8 local
streets, while working in residential streets and incorporating a design that
would work with many existing utilities. The process included obtaining DDW
approvals for many of the segments.
Pipeline Management Program, FY2018-2019 Phase 1 Project
Glendale Water & Power, Project Manager/Engineer, 2018-2019; Client
Reference: Kevin Runzer, (818) 551-6910, krunzer@glendaleca.gov
TAIT was contracted to provide design build services with JDC for the Pipeline
Management Program, FY2018-2019 Phase 1 water main replacement project.
The project was located in residential streets in various areas of Glendale which
required our team to develop construction documents that could accommodate
traffic while working in residential streets and a design that would work with
many existing utilities.
Education
B.S. -- Civil Engineering
Valparaiso University
Valparaiso, IN, 2012
Year of TAIT Team
Enlistment
2012
Total Experience
13
Certifications
Professional Engineer
California No. 86126
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 30
Daniela Malott, P.E., QSD/P
PROFESSIONAL ENGINEER (DRAINAGE/WATER QUALITY)
Ms. Malott has a strong civil engineering background with a water resources
and surface runoff focus. Her engineering experience includes hydrology, storm
drain design, and hydraulics. Her computer modeling background includes the
application of the U.S. Army Corps of Engineers HEC-HMS (Hydraulic Modeling
System), HEC-SSP (Statistical Software package), and HEC-RAS (River Analysis
Software), Watershed Modeling System (WMS), Advanced Engineering Software
(AES) for hydrologic/hydraulic analysis in Southern California, Water Surface
Pressure Gradient (WSPGW) Software, XP-Solutions Storm Water and
Wastewater Management Model (XP-SWMM), AutoCAD Civil 3D, and ArcGIS.
She has worked for projects in the County of Los Angeles, County of Orange, and
San Bernardino County. The projects she has been involved with are both in the
private and public sector. In the private sector she worked on projects for
developers including Rancho Mission Viejo and the Irvine Company. Her public
sector experience includes working on projects for the County of Orange, the
City of Rancho Palos Verdes, the City of Chino, the City of Chino Hills, and the
City of Santa Ana. She is an out of the box thinker with great energy and a hard
working ethic. She has great communication, writing, organizational and
leadership skills. Selected Project Experience:
Storm Drain Plans, Estimates, and Specifications for MDP Line S-1B, City of
Norco, Project Manager/Engineer, 2022; Client Reference: Sam Nelson, Deputy
City Engineer/Deputy Director of Public Works, (951) 270-5677,
snelson@ci.norco.ca.us
Project Manager/Engineer for the Norco Master Plan of Drainage Storm Drain
Line S-1B project, includes the design of a 24-inch storm drain later extension
line along Golden West Lane. The scope of work for the design of the storm
drain system includes hydrology and hydraulics analysis for the proposed line,
surveying, preparation of Plan, Specifications and Estimates (PS&E), assisting the
City in the bidding process and construction support.
El Salvador Park Multipurpose Regional Basin, City of Santa Ana, Project
Manager, 2020; Client Reference: Craig Foster, PE, Stormwater Program
Manager, (714) 647-5659, cfoster@santa-ana.org
The City of Santa Ana El Salvador Park Multipurpose Regional Basin Project
sought the development and construction of a Regional Infiltration Basin to
provide Water Quality Treatment for an 88 acre residential neighborhood in the
City of Santa Ana. The purpose of this project was to improve the stormwater
quality discharge to the downstream receiving waters which ultimately is the
Newport Beach Bay and to improve the Park parking facilitates for a
disadvantage community in the City of Santa Ana. This project covered support
for a grant application, preliminary engineering services including basin design,
hydrology and hydraulics analysis, water quality calculations, surveying services,
Education
M.S. - Civil Engineering
(Hydrology and Water
Resources), University of
California at Irvine
B.S. - Civil Engineering,
California State
University, Long Beach
Year of TAIT Team
Enlistment
2017
Total Experience
13
Certifications
Professional Engineer,
California No. C86581
Affiliations
American Society of Civil
Engineers (ASCE), OC YMF
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 31
and coordination with Landscape Architect, Geotechnical Engineer, and Environmental Consultants as
well as with City staff. The grants application timelines accelerated the pace of this project. As part of
this project Mrs. Malott supported Project Management, and led the team’s efforts for the Hydrology,
Hydraulics and Water Quality Analysis and Calculations.
Avocado Street Emergency Storm Drain Plan, Estimates, and Specifications, City of Newport Beach,
Project Manager/Engineer, 2023-Present; Client Reference: Michael J. Sinacori, PE, Assistant City
Engineer, (949) 644-3342, msinacori@newportbeachca.gov
Daniela provided civil engineering services for the Avocado Avenue and Waterfront Drive Storm Drain
Improvements Project. The work included the design of a new 30-inch storm drain line to replace
existing 18- and 21-inch RCP lines. The project involved detailed evaluation of site constraints and the
design of site-specific junction structures. The existing broken storm drain line was located more than 12
feet below ground surface beneath a protected tree, requiring the rerouting of the line and redesign of
the junction structure to reconnect existing storm drain segments to the main line. Extensive design
coordination was required to avoid utility and site conflicts while providing an optimal and cost-effective
solution for the City. Hydrology and hydraulic calculations were performed to assess existing runoff flow
and determine system capacity for the proposed improvements.
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 32
Christopher Engelbach, E.I.T.
DESIGN ENGINEER II
Chris is an experienced Project Engineer in design, approval, and quality control
of residential and commercial land development as well as public work projects.
He has expertise in preparation of tentative tract maps, street, rough grading,
erosion control, storm drain, sewer and water, and precise grading plans;
hydrology and hydraulic calculations utilizing Civil-D and WSPG; WQMP
employing new low impact development methods; coordination with clients,
sub-consultants, site managers, contractors, and survey crew. Chris technical
skills include AutoCAD Civil 3D, Water Surface Profile Gradient Software (WSPG),
Civil-D, and Microsoft Project. Selected Project Experience:
Irvine Center Drive Pavement Rehab., City of Irvine, Project Engineer, 2023
Client Reference: Tim Callahan, PE, Senior Civil Engineer, (949) 482-8431
tcallahan@cityofirvine.org
This project includes civil engineering design of 2 miles of federally funded
arterial roadway rehabilitation. The roadway rehabilitation methods include
full-width grind and overlay. The project also includes the identification and
replacement of non-ADA compliant curb ramps, driveways and sidewalk, the
identification and adjustment/protection of utility facilities, signing & striping
and phasing plans, and coordination/permitting with Caltrans and IRWD.
Campus Drive Rehabilitation, City of Irvine, Project Engineer, 2017-2018; Client
Reference: Darrell Hartman, PE, Senior Civil Engineer, (949) 724-7556,
dhartman@cityofirvine.org
Project Engineer providing PS&E documents for the rehabilitation of Campus
Drive as it crosses through San Joaquin Marsh (an environmentally sensitive
area). This 3500 LF rehabilitation requires full reconstruction of the existing
roadway and bike lanes for the City.
Jeronimo Road Widening, City of Lake Forest, Project Engineer, 2020-Current;
Client Reference: Doug Erdman, PE , Director of Public Works, (949) 282-5233
derdman@lakeforestca.gov
The Jeronimo Road Widening Project will correct the current roadway geometry
of Jeronimo Road at the Intersection with El Toro Road in the City of Lake
Forest. Mr. Engelbach is the Project Engineer handling the roadway widening
design which includes vertical and horizontal design, drainage, relocation of
existing public and private improvements, reconstruction of existing roadway
medians and construction of a new retaining wall. In addition to engineering
services Mr. Engelbach supports coordination with the client, land owners, and
appropriate utility purveyors.
Education
BS Civil Engineering,
California State
Polytechnic University,
Pomona
Year of TAIT Team
Enlistment
2016
Total Experience
16
Certifications
E.I.T.
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 33
Aaron Richter
DESIGN ENGINEER II
As a Civil Design Engineer II, Aaron Richter possesses extensive expertise in
preparing street, sewer, storm drain, water, rough grading, precise grading, and
striping plans. His experience includes over a year working on a survey crew for
both public and private developments, where he performed topographic and
construction surveys. Aaron excels at coordinating with clients, sub-consultants,
and survey teams to ensure project accuracy and efficiency. His technical
proficiency encompasses the design of 3D corridors for street reconstruction
and the development of 3D surfaces for complex curb ramp, driveway, and
drainage scenarios, demonstrating his ability to navigate and solve intricate civil
engineering challenges.
Lomita Avenue Rehabilitation, City of Carson, Design Engineer, 2024-Present;
Client Reference: Gilbert Marquez, PE, City Engineer, (310) 952-1700
gmarquez@carsonca.gov
Aaron Richter is leading the design efforts for the rehabilitation of 1.5 miles of
roadway on Lomita Avenue as the Design Engineer. His duties involve crafting
pavement rehabilitation strategies, as well as identifying and replacing non-ADA
compliant curb ramps, driveways, and sidewalks. In addition, he is overseeing
the repair of damaged sidewalks, driveways, medians, and curbs. Aaron is also
tasked with adjusting and protecting utility facilities to ensure the project meets
all city standards and requirements.
Central Avenue and University Drive Signal Improvement Plan, City of Carson,
Design Engineer, 2024-Present; Client Reference: Gilbert Marquez, PE, City
Engineer, (310) 952-1700, gmarquez@carsonca.gov
As the Design Engineer for the traffic signal improvements at the intersection of
Central Avenue and University Drive, Aaron Richter is responsible for
implementing traffic signal plans and coordinating related improvements. His
role includes identifying and replacing non-ADA compliant curb ramps,
driveways, and sidewalks, as well as repairing damaged sidewalks, driveways,
medians, and curbs. Additionally, Aaron manages the adjustment and
protection of utility facilities to ensure full compliance with city regulations.
E Lomita Boulevard Reconstruction, City of Carson, Design Engineer, 2023;
Client Reference: Gilbert Marquez, PE, City Engineer, (310) 952-1700
gmarquez@carsonca.gov
Aaron Richter is serving as the Design Engineer for the complete pavement
reconstruction of 1 mile of heavily damaged dirt roadway on E Lomita
Boulevard. His responsibilities include designing a 3D corridor model for the full
roadway reconstruction, re-grading the road for improved drainage, and
designing a new storm drain to resolve a major drainage issue in the middle of
the roadway. Additionally, Aaron is overseeing the adjustment and protection of
utility facilities to ensure the successful completion of the project.
Education
B.S. Civil Engineering,
California Baptist
University
Year of TAIT Team
Enlistment
2018
Total Experience
7 years
Certifications
EIT
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 34
Michael Furlong, PLS
PROJECT SURVEYOR
Mr. Furlong is a Land Surveyor licensed in the State of California with 46 years of
experience, over 30 of those being in the Field on all types of Projects from
Boundary Surveys to Construction Services with some of the largest listed
below. More recently he has spent years providing Mapping Services preparing
Tract Maps, Parcel Maps, Record of Surveys, Corner Records and Exhibits of all
kinds as well as providing Support to Engineering and Field Support for the
Survey Crews.
Public Works Related Projects
• On-call Services for Caltrans District 7 East Contact Area providing
Construction Staking and Topographical Surveys on various large
widening and reconstruction Highway Projects including the 10, 110,
134 and 210 Freeways.
• Topo and mapping of various rivers at bridge crossings along HWY 101,
Santa Clara County.
• SR 71 Segments 1 through 3 in Chino, 6 miles of new Freeway
Construction.
• I-10 Segments 1 and 2 in Montclair and Ontario, 10 Miles of Freeway
widening.
• SR 30/210 Segments 4, 5 and 7 in Rancho Cucamonga and Fontana, 6
miles of new Freeway Construction.
• I-10 in El Monte, 2 Miles of Freeway widening with 12 Undercrossing
structures to be widened.
• SR 60 in Moreno Valley, 8 miles of Freeway widening.
Year of TAIT Team
Enlistment
2019
Total Experience
46
Certifications
CA PLS 8899
Experience
2019– Present Tait and
Associates
2012 – 2019 O.K.O.
Engineering Inc.
2008 – 2012 Hernandez,
Kroone and Associates
2005 – 2007 AEI-CASC
Consulting
1997 – 2005 David
Evans and Associates,
Inc.
1981 – 1997 J.F.
Davidson and Associates,
Inc.
Equipment
GPS-Trimble & Lieca,
Total Stations Trimble &
Leica, Data Collectors-
Trimble, Leica & Allegro,
Electronic Levels,
AutoCAD
EDUCATION
B.S. (Civil Engineering) 1995
REGISTRATION
California
Professional Civil Engineer
C69467
Professional Traffic Engineer
TR2565
Idaho
Professional Civil Engineer
(ID) 20918
CAREER SUMMARY
CAREER SUMMARY
Mr. Thomas J. Wheat, P.E., T.E., is the owner and Principal of TJW. He has been
involved in the traffic engineering profession for over 30 years managing and
designing traffic engineering and transportation planning related projects for both
the public and private sectors. His versatile experience includes a wide variety of
design and construction projects, and traffic engineering studies. This includes traffic
signals, traffic control, signing and striping, signal timing, ITS, traffic impact studies,
warrant analyses and traffic safety studies. Acting as an extension of staff, Mr.
Wheat has represented agencies and cities at City Council meetings, Planning
Commissions, Public Works Committees, and public outreach meetings. With
expertise in traffic engineering, Mr. Wheat has also provided plan check services to
the cities of Canyon Lake, Perris, and San Jacinto in Riverside County as well as to the
Public Works Department of Orange County.
Leading the TJW team, TJW has had the opportunity to design miles of signing and
striping plans and traffic control plans and over 45 traffic signalized intersections and
roundabouts within the Orange County Great Park and Neighborhoods in the City of
Irvine since 2012. Along with the design, TJW analyzed the capacity and efficiency of
roundabouts surrounding Great Park’s sports park. In addition to design work, Mr.
Wheat has also prepared a variety of traffic engineering studies including traffic
impact studies, trip generation studies, parking studies, safety studies, and warrant
analyses, to name a few, for various clients and agencies throughout Southern
California as well as for public agencies on the East Coast.
Mr. Wheat also has substantial experience in the operations side of traffic signals
where he has created timing plans for individual signalized intersections as well as
signal systems by using modeling programs, such as Synchro and SimTraffic. He has
had the opportunity to adjust and implement timing plans into individual field
controllers along with a city’s centralized signal system computer.
Mr. Wheat’s leadership ensures that every TJW project meets the highest standards
of engineering precision, safety, performance, and community responsiveness.
THOMAS J. WHEAT, P.E., T.E.
Principal-in-Charge / Owner
30336 Esperanza, Rancho Santa Margarita, CA 92688 | ph: 949.888.6513 | fax: 949.888.1380 | web: www.gmugeo.com
ROGER W. SCHLIERKAMP, MSC, PE
Vice President, Principal Pavement Engineer
PROFESSION
Civil Engineer
REGISTRATION
Registered Civil Engineer C81529
State of California
EDUCATION
M.S. Civil Engineering
(Pavement/Materials Engineering),
University of Nevada, Reno
B.S. Civil Engineering
University of Nevada, Reno
PROFESSIONAL EXPERIENCE
GMU Geotechnical, Inc.
(2014 – Present)
Vice President, Principal
Pavement Engineer, Rancho
Santa Margarita, California
Twining, Inc.
(2011 – 2014)
Pavement Engineer
Long Beach, California
University of Nevada, Reno
(2009 – 2011)
Graduate Researcher,
Pavement / Materials
Reno, Nevada
PROFESSIONAL AFFILIATIONS
• California Asphalt
Pavement Association
(CalAPA)
• ASCE Orange County -
Engineers without Borders
• American Society of Civil
Engineer (ASCE)
• AGC
• American Public Works
Association (APWA)
• Santiago Canyon College
– Part Time Instruction
(Construction Materials)
Roger Schlierkamp leads GMU’s comprehensive range
of pavement engineering services, including pavement
evaluations/designs, PS&E development, construction
management, observation and testing, mix design
development, and pavement management planning. His
full-circle knowledge allows him to develop innovative,
practical, and cost-effective solutions for pavement
challenges.
He shares his experience and knowledge in both
workshop and classroom settings, having previously
taught "Construction Materials and Testing" at Santiago
Canyon College. His active role in the Greenbook
Committee also underscores his influence in shaping
pavement construction specifications embraced by
numerous agencies and projects across Southern
California.
Roger possesses over 15 years of experience in
pavement engineering and is a California-licensed civil
engineer. A summary of his areas of expertise includes:
• Pavement engineering evaluation, structural
analysis, rehabilitation design
• Pavement management planning (PMP)
• Pavement construction management advisory
• Pavement plans, specifications, and estimates
• Non-destructive testing, including falling-weight
deflectometer (FWD) testing & ground-penetrating
radar (GPR) testing
• Pavement smoothness testing
• Pavement mix designs, including hot-mix asphalt
(HMA), rubberized hot-mix asphalt (RHMA), warm-
mix asphalt (WMA) following Marshall, Hveem, and
Superpave design methods, soil-stabilization, and
cold recycled asphalt
• Pavement preservation strategies, including fog
seals, slurry seals, scrub seals, micro-surfacing
seals, and chip seals
• Pavement rehabilitation strategies, such as
rubberized pavement overlays, cold recycling, full-
depth reclamation, cement/lime base, and subgrade
stabilization
• In-depth knowledge of various pavement
construction specifications, including Caltrans,
Greenbook, Airport, and Ports.
• Quality control / assurance laboratory testing
expertise, including Hveem Stability, Hamburg
Wheel Track, Moisture Susceptibility, and more.
Roger W. Schlierkamp 2
Select Pavement Evaluation and Design Projects
Local Municipalities and Agencies
Annual Street Resurfacing Projects, City of San Fernando, 2020-2025: Oversaw the
pavement evaluation, design, preparation of plans/specifications, and construction-support
services for City of San Fernando’s Phase 1, Phase 2, and Phase 3 Street Resurfacing
Projects. Each phase reflects a separate annual project and generally involves localized
repairs and a combination of surface treatments, including micro-surfacing, chip sealing, and
slurry sealing. Upon completing the Phase 3 project, approximately 75 percent of the city’s
roadway network was resurfaced.
Main Street from E 228th Street to E Lomita Boulevard, City of Carson, CA, September
2024: Pavement design engineer performing and overseeing the pavement evaluation of Main
Street, including corings, laboratory testing, and analysis.
Brookhurst Street from Ball Road to La Palma Avenue, City of Anaheim, CA, August
2024: Pavement design engineer performing and overseeing the pavement evaluation of
Brookhurst Street, including corings, laboratory testing, and analysis. The existing roadway
exhibited primarily aging-related distress types. Pavement improvement strategy
recommendations were developed to limit reflective cracking propagation.
South Serrano Ave from Nohl Ranch Road to South Weir Canyon Road Pavement
Evaluation Project, City of Anaheim, CA, May 2023: Pavement design engineer overseeing
the evaluation of this roadway segment, including pavement surface condition assessment,
corings, falling weight deflectometer testing, laboratory testing, analysis, and development of
pavement rehabilitation recommendations.
Harbor Boulevard from Lincoln Avenue to North Street, City of Anaheim, CA, July 2024:
Pavement design engineer performing and overseeing the pavement evaluation of Harbor
Boulevard, including corings, laboratory testing, and analysis. The existing roadway exhibited
a combination of localized load-related distress types and aging-related distress types.
Pavement improvement strategy recommendations were developed to improve the structural
capacity of localized areas and limit reflective cracking propagation.
Eastern Avenue from Huntington Drive to Valley Boulevard, City of Los Angeles, CA,
December 2023: Pavement design engineer performing and overseeing the pavement
evaluation of various segments of Eastern Avenue, including corings, ground-penetrating
radar (GPR) testing to identify approximate limits of buried underlying PCC, laboratory testing,
and analysis.
Camino Capistrano, City of San Juan Capistrano, CA 2016-2023: Pavement design
engineer performing and overseeing the pavement evaluation of various segments of Camino
Capistrano, including corings, ground-penetrating radar (GPR) testing to identify approximate
limits of buried underlying PCC, laboratory testing, and analysis. Roger also oversaw the
project during construction, managing construction materials observation and testing.
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
Page | 35
G. CONFLICT OF INTEREST
TAIT & Associates, Inc. has reviewed the City’s conflict of interest requirements and confirms that no
known conflicts of interest exist.
H. TERMS AND CONDITIONS
TAIT has thoroughly reviewed the RFP and its attached standard professional services agreement, and
we have no exceptions. This proposal shall remain valid for a period of one hundred twenty (120) days
from the date of receipt by the City.
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
APPENDIX A
The proposal from GMU Engineers and Geologists is included on the following page for reference.
PROJECT UNDERSTANDING
GMU understands that the City of Diamond Bar is interested in obtaining pavement
engineering services to evaluate the existing condition and obtain pavement improvement
recommendations for Project 2 of the FY25/26 Civil Engineering Design Services Project,
consisting of the following arterial segments:
1. Brea Canyon Road from Diamond Bar Boulevard to Pathfinder Road
2. Brea Canyon Road from Pathfinder Road to Washington Avenue
3. Diamond Bar Boulevard from the SR-60 Off-Ramp to the Northerly City Limit
The existing pavement conditions on the three segments vary and exhibit a combination
of aging (longitudinal, transverse, and block cracking) and load-related (isolated areas of
alligator cracking) distress types.
Segment 1: Brea Canyon Road from Diamond Bar Boulevard to Pathfinder Road
The roadway segment is approximately 6,700 centerline feet long and generally contains
one (1) travel lane per direction. The roadway is oriented in a north-south direction.
Segment 2: Brea Canyon Road from Pathfinder Road to Washington Avenue
The roadway segment is approximately 8,500 centerline feet long and generally contains
two (2) travel lanes per direction with a two-way travel lane median. The roadway is
oriented in a north-south direction.
Segment 3: Diamond Bar Boulevard from the SR-60 Off-Ramp to the Northerly City Limit
The roadway segment is approximately 7,400 centerline feet long and generally contains
two (2) travel lanes per direction. The roadway is oriented in a north-south direction.
Raised, landscaped median islands separate the two directions.
SCOPE OF WORK
Task 1 – Document Review, Dig Alert Coordination & Encroachment Permit
GMU will conduct a document review of existing relevant records provided to us. The
information obtained from this review, including construction as-built plans, specifications,
existing section thicknesses, and dates of previous pavement improvements, will be taken
into consideration in engineering analysis.
To evaluate the existing pavement condition surface, GMU will perform visual
assessments of the street to identify the type, extent, and severity levels of the pavement
distresses in general accordance with ASTM D 6433.
Proposal to Provide Project 2 Pavement Evaluation Services for Brea Canyon Road & Diamond Bar
Boulevard, City of Diamond Bar, California
November 6, 2025 Page 2 of 9 GMU Proposal 25.395.00
During this assessment, drill hole locations will be marked in the field, and Dig Alert
(Underground Service Alert) will be notified to assess potential conflict with known
underground utilities prior to performing pavement corings. It is assumed that a single
round of Dig Alert markings will be painted and cleared through Dig Alert.
GMU will apply for a City of Diamond Bar no-fee Encroachment Permit (EP), with support
from the City’s Project Manager, before proceeding with the field exploration tasks. We
assume that we will submit an encroachment permit application to the city’s project
manager, along with location map(s), certificate of insurance, and business license. The
pavement corings will be performed using a class “C” Contractor, and their contractor’s
license number will be provided with the application. Our budget assumes the city will
provide one round of review comments, and GMU will address all review comments in
the same round. We have assumed permits from other agencies are not required.
Task 2 – Subsurface Exploration
GMU will perform a total of 28 to 32 asphalt pavement corings distributed along the three
segments.
Our budget assumes four (4) days of pavement corings in total, which will be performed
between the hours of 8 am and 5 pm.
The subsurface exploration will be performed up to 4 feet below the top of the existing
asphalt surface using an electric-powered core drill. Sampling and digging below the AC
section will be performed using hand tools. The thickness of the existing asphalt concrete
(AC) and aggregate base (AB), if present, will be recorded. Paving fabric will be
documented if encountered. Underlying PCC or Macadam, if encountered, will be
recorded. Samples of the subgrade soil will be collected, as needed. Upon completion of
the sampling, the core hole will be backfilled with soil cuttings or other suitable backfill
materials and capped with asphalt concrete cold patch.
Traffic control will consist of single lane closures, performed in accordance with the
WATCH Manual. Traffic control will consist of cones and arrow boards that will redirect
vehicles around our work zone. We have assumed that traffic control plans will not be
required, and costs to have traffic control plans prepared or stamped are not considered
in our fee.
Task 3 – Laboratory Testing
We will perform laboratory testing of the samples collected from the pavement corings in
our in-house Caltrans-certified pavement materials laboratory. Testing may include the
following:
• Maximum density and optimum moisture content
• Laboratory soil classification (Atterberg Limits and Percent Passing No. 200 Sieve)
• R-value testing
Proposal to Provide Project 2 Pavement Evaluation Services for Brea Canyon Road & Diamond Bar
Boulevard, City of Diamond Bar, California
November 6, 2025 Page 3 of 9 GMU Proposal 25.395.00
• In-place moisture content
• Sulfate Content
The exact type and quantity of tests will be dependent on the conditions encountered.
Task 4 – Pavement Engineering Analysis
Pavement engineering analysis will be performed in general accordance with the Caltrans
Highway Design Manual, 6th Edition.
Caltrans methodology considers the relationship between the traffic index (TI), subgrade
soil strength (through R-value testing), and the gravel factors of the various pavement
layers, to allow us to calculate the required replacement pavement thicknesses. Based
on the information gathered from the previous tasks, pavement engineering analysis will
be performed to develop cost-effective and viable pavement improvement
recommendations. The subgrade soil condition, in-place structural section, traffic
conditions, depth of cracking, construction costs of different repair methods, and more
will be considered when developing pavement repair recommendations.
We will utilize the TI provided by the City for the requested pavement design life.
Task 5 – Pavement Evaluation and Design Recommendations Report
GMU will summarize our work, findings, conclusions, and recommendations into a single
report. The report will include the following information:
• Summary of information gathered from the document review, if any;
• Project location and project limits map;
• Subsurface exploration (coring) location map;
• Pavement coring information summary table (asphalt concrete thickness, fabric,
aggregate base thickness, subgrade soil type, underlying PCC, etc.);
• Select photographs of the pavement surface condition;
• Laboratory testing results;
• Falling weight deflectometer data map, if elected (similar to Figure 2);
• Ground-penetrating radar data map, if elected (similar to Figure 3);
• AC localized repair map, if elected (similar to Figure 4); and
• Pavement improvement recommendations, including thickness recommendations.
GMU possesses extensive experience in developing cost-effective pavement repair
alternatives, including the following:
• Localized AC repairs (patches) followed by mill-and-overlay repair using
conventional AC or rubberized AC pavement;
• Cold in-place (CIR) or cold central plant recycled (CCPR) asphalt concrete (AC)
pavement;
Proposal to Provide Project 2 Pavement Evaluation Services for Brea Canyon Road & Diamond Bar
Boulevard, City of Diamond Bar, California
November 6, 2025 Page 4 of 9 GMU Proposal 25.395.00
• Cement-stabilized pulverized base (CSPB) as part of the pavement structural
section;
• Cement- or lime-stabilized soils (CSS or LSB) for subgrade stabilization and/or as
part of the pavement structural section;
• Fiber-reinforced asphalt concrete (FRAC) to improve reflective cracking resistance
and/or reduce required AC thickness;
• Asphalt Rubber Aggregate Membrane (ARAM);
• Rubberized hot-mix asphalt (RHMA or ARHM overlays);
• Geogrid/geotextiles to reduce required aggregate base thickness or to stabilize
subgrade conditions, and more.
The tasks described above and our experience in the design and construction of these
strategies allow us to recommend cost-effective alternative pavement repair strategies.
The final report will be signed and stamped by a California-registered civil engineer.
OPTIONAL SCOPE ITEMS
Optional Task A – Deflection Testing and Analysis
If elected, to evaluate if the pavement can be milled and overlaid and achieve the desired
design life, GMU will perform non-destructive pavement deflection testing in accordance
with California Test 356. Deflection testing involves applying an impact load (simulating
truck traffic) and measuring the corresponding deflection response. Generally, lower
deflection readings indicate a stronger pavement section, whereas higher deflection
measurements indicate a weaker pavement section.
Essential benefits of deflection testing include:
• Allowing the in-place structural capacity to be analyzed and determined (whether
the in-place pavement is structurally adequate or inadequate for the anticipated
future traffic volume/design life).
• Providing additional data that can foreshadow potential constructability challenges,
such as whether or not the milled AC surface or subsurface conditions will be able
to support construction loading.
• Identifying potential weak areas that visual surface inspection may not.
• Compared to pavement repair recommendations derived primarily from coring
data and subgrade R-value tests, performing deflection testing and analysis of
deflection data often leads to more cost-effective pavement repair
recommendations.
We propose to perform two (2) days of deflection testing with testing conducted at 200-
to-250-foot intervals. Each deflection test point will be geo-referenced using a Global
Proposal to Provide Project 2 Pavement Evaluation Services for Brea Canyon Road & Diamond Bar
Boulevard, City of Diamond Bar, California
November 6, 2025 Page 5 of 9 GMU Proposal 25.395.00
Position System (GPS). The tests will be staggered in both directions of travel to increase
the coverage of each section.
Moving closure traffic control (traffic control truck with arrow boards), following behind the
deflection testing equipment will be utilized.
Figure 1: GMU's Falling-Weight Deflectometer (FWD) Performing Testing on Balboa
Boulevard for the City of Newport Beach.
Figure 2: Deflection Testing Data Map. Red data points represent weaker or thinner
pavement areas.
Optional Task B – Ground-Penetrating Radar (GPR) Testing and Analysis
If elected, GMU will perform a single day of GPR testing. The abundance of data offered
by performing GPR tests allows us to reduce the number of pavement coring days, traffic
control, and associated costs. This approach allows us to gather significantly more data
compared to performing corings alone while also reducing the overall cost of our field
exploration program. GMU will perform non-destructive GPR testing and analysis to
obtain continuous pavement subsurface information. Information such as the presence
and thickness of asphalt concrete and the underlying aggregate base will be gathered
Proposal to Provide Project 2 Pavement Evaluation Services for Brea Canyon Road & Diamond Bar
Boulevard, City of Diamond Bar, California
November 6, 2025 Page 6 of 9 GMU Proposal 25.395.00
from GPR data. GPR data allows for continuous measurement of pavement layer
thicknesses, enabling a more precise determination of pavement recommendations.
GPR testing involves emitting a series of radar waves from an antenna into the pavement
structure using a GSSI RoadScan 30 system that includes a GSSI SIR-30 radar control
unit, data acquisition system, electronic wheel-mounted distance measuring instrument
(DMI), Global Position System (GPS), and antennas of various frequencies.
We propose to use a 2 GHz “air horn” antenna, positioned 18 inches above the ground
surface. Depending on the material types being scanned, this antenna will scan to a
depth of approximately 1.5 to 2 ft deep.
RADAN7 software will be used to analyze the GPR data gathered. Each pavement
structural layer’s dielectric constant will be analyzed to identify the pavement structural
layer types and thicknesses. The depths to the bottom of asphalt and aggregate base
layers will be calculated based on the two-way travel time of the GPR signal and the
strength (amplitude) of the energy reflecting back. GPR data is calibrated by comparing
the computed GPR depths to “ground-truth” coring data.
Our budget includes a single day of GPR testing.
Figure 3: Sample GPR testing data map. Thinner AC pavement areas (red) display a
greater concentration of load-related distress types.
Optional Task C – Identification of Isolated AC Repair Locations
Identifying localized AC repair areas can be very subjective. If elected, a GMU Pavement
Engineer will identify isolated AC repair locations (patches), based on a combination of
factors such as:
• Type and severity of the pavement surface distress type (i.e., medium- or high-
severity load-related distresses such as alligator cracking or depressions)
Proposal to Provide Project 2 Pavement Evaluation Services for Brea Canyon Road & Diamond Bar
Boulevard, City of Diamond Bar, California
November 6, 2025 Page 7 of 9 GMU Proposal 25.395.00
• Coring data (i.e., areas with inadequately thick in-place pavement)
• Deflection testing data (i.e., areas with exceedingly high deflection
measurements), if available
• GPR data (i.e., areas with inadequately thick in-place pavement), if available
• Laboratory data (i.e., areas with high subgrade moisture content)
Areas highly recommended for isolated AC repairs (i.e., “must do” areas) will be illustrated
in red. Areas that are recommended for isolated AC repairs (i.e., “on-the-fence”) will be
illustrated in yellow. Ideally, all areas should be addressed with an isolated AC repair;
however, we understand that often, the amount of isolated AC repairs will need to be
prioritized, and this approach allows flexibility for the design team to do so.
Figure 4: Sample AC localized repair map. Red polygons represent higher-priority patch
repairs and yellow polygons represent lower-priority patch repairs.
SCHEDULE
Task Duration
Task 1 – Document Review, Dig Alert Coordination, and
Encroachment Permit 2-3 week(s)*
Task 2 – Subsurface Exploration 2-3 week(s)
Task 3 – Laboratory Testing 2 week(s)
Task 4 – Pavement Engineering Analysis 3 week(s)
Task 5 – Pavement Evaluation and Design Recommendations Report 2-3 week(s)
Tasks 1-5 Duration 11-14 week(s)
*Assumes encroachment permit is issued within 1 week of submittal.
Proposal to Provide Project 2 Pavement Evaluation Services for Brea Canyon Road & Diamond Bar
Boulevard, City of Diamond Bar, California
November 6, 2025 Page 8 of 9 GMU Proposal 25.395.00
For the optional scope items, the anticipated additional duration is as follows:
Task Duration
Optional Task A – Deflection Testing and Analysis +2 week(s)
Optional Task B – Ground Penetrating Radar (GPR) Testing and
Analysis +2 week(s)
Optional Task C – Identification of Isolated AC Repair Locations +2 week(s)
ESTIMATED COST
We propose to provide the scope of work described in our proposal for the following
estimated costs. These costs have been developed using the attached 2025 Schedule of
Charges and will be billed on a lump-sum percent-completion basis.
Task Cost
Task 1 – Document Review, Dig Alert Coordination, and
Encroachment Permit $ 5,466
Task 2 – Subsurface Exploration $ 37,830
Task 3 – Laboratory Testing $ 9,310
Task 4 – Pavement Engineering Analysis $ 10,383
Task 5 – Pavement Evaluation and Design Recommendations Report $ 9,210
Tasks 1-5 Total Estimate $ 72,199
Optional Scope Cost
Optional Task A – Deflection Testing and Analysis +$ 24,186
Optional Task B – Ground Penetrating Radar (GPR) Testing and
Analysis +$ 12,812
Optional Task C – Identification of Isolated AC Repair Locations +$ 7,481
The proposed scope of services is consistent with the level of care and skill ordinarily
exercised by engineering professionals with experience in this area. No warranty, either
expressed or implied, is made.
ASSUMPTIONS
We have assumed that pavement corings will be performed outside of Caltrans right-of-
way and permits from other agencies besides the City of Diamond Bar are not required.
If required, Caltrans encroachment permits can be obtained.
If underlying PCC is encountered, a 400 MHz “ground-coupled” antenna can be used to
determine the layer thickness. The cost to perform GPR testing using an additional 400
MHz antenna can be provided in a separate proposal.
Proposal to Provide Project 2 Pavement Evaluation Services for Brea Canyon Road & Diamond Bar
Boulevard, City of Diamond Bar, California
November 6, 2025 Page 9 of 9 GMU Proposal 25.395.00
We have assumed that backfilling the boreholes with soil cuttings and surfacing them with
AC cold patch is acceptable. Sand blasting to remove Dig Alert markings, pavement
grinding, and/or hot asphalt patch were not considered in our cost estimate.
We have assumed that resident notifications, including setting up no-parking signage or
distributing notifications, are not required, and the cost for these efforts is not considered
in our estimate.
Our services do not include reviewing project plans and specifications to verify
conformance with our recommendations, bid support services, and/or construction
support services. With written authorization from you, these services can be provided for
an additional fee.
This proposal specifically excludes the assessment of environmental characteristics,
particularly those involving hazardous substances at the site. In the event that obviously
suspicious subsurface materials are encountered visually or by odor in the geotechnical
test borings, such drilling will be immediately terminated until we receive direction from
you. GMU will notify you as soon as possible of such an occurrence, and we will both
mutually decide whether to continue, modify, or cease the remainder of the drilling
program and whether an environmental assessment should be conducted. All added
costs incurred because of suspected hazardous substances will be charged on a time-
and-expense basis over and above the established fees for the site investigation.
TAIT & Associates, Inc.
FY 25/26 Design Services – Streets & ADA Curb Ramps
APPENDIX B
Attached are applicable pages from TJW Engineering’s proposal for Project 2 for reference.
9841 Irvine Center Drive, Suite 200 | Irvine, California 92618 | t: (949) 878-3509
www.tjwengineering.com
November 7, 2025
Mr. Dennis Postler, PE
Director of Public Infrastructure
TAIT & ASSOCIATES
701 N. Parkcenter Drive
Santa Ana, CA 92705
PROPOSAL: Proposal for Traffic Engineering Services
City of Diamond Bar – FY 25/26 Civil Engineering Design Services (Project SI261)
Residential & Collector Streets and Arterial Street Rehabilitation
Dear Mr. Postler:
TJW Engineering, Inc. (TJW) is pleased to submit this proposal to Tait & Associates, Inc. (Tait) to
provide traffic engineering services in support of the City of Diamond Bar’s FY 25/26 Civil
Engineering Design Services – Project SI261. TJW would support the Tait team in the preparation
of traffic related design plans, specifications, and estimates (PS&E) for the following seven
projects, five projects for arterial streets and two project for residential streets:
Arterial Street Projects
• Project 2 – Arterial Street Rehabilitation: Brea Canyon Road / Diamond Bar Boulevard
• Project 5 – Arterial Street Rehabilitation: Pathfinder Road
• Project 8 – Arterial Street Rehabilitation: Grand Avenue / Diamond Bar Boulevard
• Project 9 – Arterial Street Rehabilitation: Temple Avenue / Avenida Rancheros
• Project 10 – Arterial Street Rehabilitation: Diamond Bar Boulevard / Brea Canyon Road
Residential Area Projects
• Project 4 – Residential & Collector Streets Rehabilitation (Area 5)
• Project 7 – Residential & Collector Streets Rehabilitation (Area 6)
Each of the projects will be prepared as a stand-alone PS&E package in accordance with the City’s
3-Year Pavement Design Program, as outlined in Addenda 1 through 3. TJW would support Tait
in the preparation of signing and striping plans, traffic signal loop replacement design, and the
evaluation of new or improved bike lanes on arterial corridors, as well as the preparation of traffic
Mr. Dennis Postler, PE
Diamond Bar TE Proposal
November 7, 2025
Page 2
TJW Engineering, Inc.
TAT25 Diamond Bar RFP Traffic Proposal
control and phasing recommendations to support constructability, access, and community
impacts.
The plans would be prepared using AutoCAD and developed in accordance with the City of
Diamond Bar’s and Caltrans design standards. TJW will ensure that all drawings meet the City’s
requirements for format, scale, drafting conventions, notes, and details, and will maintain
consistency with the City’s preferred plan organization and review expectations.
Mr. Dennis Postler, PE
Diamond Bar TE Proposal
November 7, 2025
Page 3
TJW Engineering, Inc.
TAT25 Diamond Bar RFP Traffic Proposal
PROJECT 2 – ARTERIAL STREET REHABILITATION
2A Brea Canyon Rd – South Diamond Bar Blvd to Pathfinder Rd (6,500-feet)
2B Brea Canyon Rd – Pathfinder Rd to Golden Springs Dr
2C Diamond Bar Blvd – SR-60 Off-Ramp to City Limit
Scope of Work
TJW would prepare signing and striping plans for the arterial rehabilitation project encompassing
Brea Canyon Road (2A/2B) and Diamond Bar Boulevard (2C). The design would include the
evaluation and integration of new or improved bike lanes consistent with the City’s General Plan
Circulation Element and Complete Streets policies.
TJW would obtain record drawings for the segment and verify existing conditions through a field
review. The field review would identify the location and condition of existing pavement markings,
striping, signs, and signal loop detectors that may be affected by the pavement rehabilitation.
TJW would use this information to determine the redesign of the signing and striping layout and
identify where bike lanes could be incorporated.
As part of Task 3, TJW would assist the Tait team in evaluating constructability issues and
providing recommendations for construction phasing, staging, and traffic control to maintain
reasonable access during construction. This effort would identify potential community impacts
such as parking removal, lane closures, access to schools and businesses, and detour needs, and
include a review of bike lane feasibility and integration consistent with the City’s Complete
Streets Policy, bicycle master plan, and CA MUTCD standards. The findings would be summarized
in a memorandum style letter, which would convey the anticipated construction approach, lane
closure and detour requirements, parking and access impacts, and bike lane integration
considerations.
TJW would prepare and submit plans, specifications, and estimates (PS&E) and the traffic
engineering memo for each project segment. Submittals would be provided at the 30%, 60%, and
90% design stages and include plans, outline specifications, and preliminary cost estimates in PDF
format.
2A. Brea Canyon Rd – South Diamond Bar Blvd to Pathfinder Rd
Project segment 2A includes approximately 6,500 feet of pavement rehabilitation. The corridor
is located on the east side of SR-57 and includes two signalized intersections at Diamond Bar
Boulevard and Pathfinder Road, along with three all-way stop intersections near Diamond Bar
Mr. Dennis Postler, PE
Diamond Bar TE Proposal
November 7, 2025
Page 4
TJW Engineering, Inc.
TAT25 Diamond Bar RFP Traffic Proposal
High School that feature existing traffic calming and significant on-street parking. TJW would
prepare signing and striping plans that include parallel and angled parking stalls to replace those
affected by the rehabilitation and maintain on-street parking consistent with existing use and
City standards.
Even though the City could benefit from adding bike lanes along Brea Canyon Road near the high
school, the design team would need to evaluate the tradeoffs of removing parking that is likely
needed for school access and drop-off activity. TJW would review this section to determine
whether bike lanes can be reasonably incorporated while maintaining necessary parking and
access.
At Pathfinder Road, both the advanced and presence detection loops would need to be replaced
because the paving operations would impact the existing loops. At Diamond Bar Boulevard, only
the advanced detection loops are expected to be affected since the intersection appears to use
video detection for presence detection. TJW would prepare loop detector details for each
intersection showing the locations and quantities for replacement. The contractor would be
directed to saw-cut to the adjacent pull box and splice the new loop detector wire into the
existing cable within the pull box.
2B Brea Canyon Rd – Pathfinder Rd to Golden Springs Dr
This 2B project segment includes approximately 6,000 feet of pavement rehabilitation along the
corridor located on the west side of SR-57, which includes four signalized intersections. TJW
would prepare signing and striping plans to replace all pavement markings affected by the
rehabilitation and perform a bicycle lane evaluation to determine if a Class II bike lane could be
incorporated within the available roadway width.
At Glenbrook Drive, Diamond Crest Lane, and Pathfinder Road, both the advanced and presence
detection loops would need to be replaced because the paving operations are expected to
disturb the existing loops. At Golden Springs Drive, only the advanced detection loops are
anticipated to be affected, as the intersection appears to use video detection for presence
detection. TJW would prepare loop detector details for each intersection showing the locations
and quantities for replacement. The contractor would be directed to saw-cut to the adjacent pull
box and splice the new loop detector wire into the existing cable within the pull box.
2C North Diamond Bar Blvd – SR-60 Off-Ramp to City Limit
This 2C project segment includes approximately 7,300 feet of pavement rehabilitation located on
the north end of the City, running parallel to SR-57 on the east side. The corridor includes a raised
Mr. Dennis Postler, PE
Diamond Bar TE Proposal
November 7, 2025
Page 5
TJW Engineering, Inc.
TAT25 Diamond Bar RFP Traffic Proposal
median and an existing Class II bike lane, where the configuration allows for the potential
installation of a buffer between the travel lanes and the existing bike lane. TJW would prepare
signing and striping plans to replace all pavement markings affected by the rehabilitation and
evaluate opportunities to enhance the existing bike lane with buffered separation consistent with
the CA MUTCD standards.
The corridor includes five signalized intersections at Temple Avenue, Highland Valley Road,
northbound SR-57 On-Ramp, Sunset Crossing Road, and the SR-60 Ramps. At Temple Avenue,
Sunset Crossing Road, and the SR-60 Ramps, both the advanced and presence detection loops
would need to be replaced since these intersections do not utilize video detection. At Highland
Valley Road and the northbound SR-57 On-Ramp, only the advanced detection loops are
expected to be affected because these locations appear to use video detection for presence
detection. TJW would prepare loop detector details for each intersection showing the locations
and quantities for replacement. The contractor would be directed to saw-cut to the adjacent pull
box and splice the new loop detector wire into the existing cable within the pull box.
TJW would coordinate with Tait to submit the intersection plans for the SR-57 and SR-60 ramp
locations to Caltrans for review and approval. It is anticipated that Caltrans separate signing and
striping plans, traffic signal plans, and traffic control plans would be needed for submittal.
TJW Fees
Project 2
2A Brea Canyon Rd – South Diamond Bar Blvd to Pathfinder Rd $18,000.00
2B Brea Canyon Rd – Pathfinder Rd to Golden Springs Dr $14,000.00
2C North Diamond Bar Blvd – SR-60 Off-Ramp to City Limit $28,500.00
City Submittal Plans and Memo: $16,500.00
Caltrans Submittal Plans: $12,000.00
Mr. Dennis Postler, PE
Diamond Bar TE Proposal
November 7, 2025
Page 18
TJW Engineering, Inc.
TAT25 Diamond Bar RFP Traffic Proposal
QUALIFICATIONS
TJW Engineering, Inc., with offices in California and Idaho, has proudly delivered innovative
traffic engineering and transportation planning solutions since 2010. Over the past 15 years, TJW
has partnered with cities, counties, architects, civil engineers, developers, school districts, and
community associations to provide tailored, practical, and cost-effective services. Specializing in
traffic signal design, signing and striping, street lighting, traffic control, and comprehensive traffic
engineering analysis, TJW has earned a reputation for delivering reliable, high-quality results that
align with each client’s vision and project goals.
Leading TJW Engineering is Thomas J. Wheat, PE, TE, a professional with 30 years of experience
in traffic engineering and transportation planning. Mr. Wheat is licensed as a Professional Civil
Engineer in both California and Idaho, and as a Professional Traffic Engineer in California. He is
known for his technical expertise, practical design approach, and strong commitment to client
service. His leadership has shaped TJW’s reputation for delivering clear, buildable plans that align
with agency standards and community goals.
Mr. Wheat’s experience spans the full spectrum of traffic engineering and roadway design,
including traffic signal systems, signing and striping, traffic control plans, street lighting, fiber
optic interconnect, Intelligent Transportation Systems (ITS), traffic modeling, and traffic signal
operations. He has led the design and analysis of corridor improvements, intersection
enhancements, and active transportation projects that incorporate pedestrian and bicycle
facilities, multi-use trails, and safe routes to school. His approach emphasizes practical design,
operational efficiency, and field awareness, with a strong focus on coordination with city, county,
and state agencies to ensure each project is functional, compliant, and constructible. Mr. Wheat
remains actively involved through all project phases—supporting field investigations, conducting
operational analyses, coordinating with utility providers, and responding to RFIs and submittals
during construction—to ensure designs are implemented as intended. His well-rounded
expertise and leadership contribute to TJW’s ability to deliver complete, integrated
transportation solutions that address both current and future mobility needs.
Together, the TJW team combines decades of experience and technical expertise to deliver
exceptional results. With a reputation for reliability and professionalism, TJW is prepared to
address challenging traffic engineering projects while fostering strong partnerships and achieving
lasting outcomes.