The URL can be used to link to this page

Home My WebLink AboutPROPOSAL FOR DESIGN OF SYCAMORE CANYON PARK PEDESTRIAN BRIDGE REMOVAL _ YWR ArchitectsYWR Architects 229 S. Mission Dr. San Gabriel, CA 91776 May 19, 2025 Dear City of Diamond Bar, On behalf of YWR Architects, I am pleased to submit our proposal for the removal of the exis�ng pedestrian bridge and associated site improvements located at 22930 Golden Springs Drive, at the southeast corner of Golden Springs Drive and Sycamore Park, in the City of Diamond Bar. The scope of work includes the safe demoli�on and removal of the deteriorated pedestrian bridge originally constructed in the 1960s, which has reached the end of its useful life due to structural damage caused by age, weathering, and termite infesta�on. In addi�on, our proposal addresses the rerou�ng or alterna�ve solu�on for the exis�ng electrical conduit currently providing power to the adjacent streetlight via the bridge. To maintain public access and enhance park usability, we have included recommenda�ons for establishing an alterna�ve pedestrian route to the trailhead and park path. Reloca�on of the exis�ng swing gate and associated signage will also be undertaken to preserve vehicle access control to the trail and maintenance area in line with the new pedestrian circula�on plan. Please note that all condi�ons and pricing outlined in our proposal shall remain valid for a period of ninety (90) calendar days from the date of this leter. We appreciate the opportunity to support the City of Diamond Bar on this important community improvement project and look forward to the possibility of working together. Should you have any ques�ons or require addi�onal informa�on, please do not hesitate to contact me directly. Sincerely, Andy Su Principal YWR Architects 626.542.5946 andy@ywrising.com In accordance with the submission requirements, we respectfully include the following statements as part of our proposal: 1. This RFP shall be incorporated in its entirety as a part of the Consultant’s quote. 2. YWR Architects is willing to accept the terms of the agreement. 3. The services to be provided, and fees therein, will be in accordance with the City’s RFP. 4. All federal laws and regulations shall be adhered to notwithstanding any state or local laws and regulations. In case of conflict between federal, state, or local laws or regulations, the strictest shall be adhered to. 5. The Consultant shall allow all authorized federal, state, county, and the City of Diamond Bar officials access to place of work, books, documents, papers, fiscal, payroll materials, and other relevant contract records pertinent to this project. All relevant records shall be retained for at least five (5) years. 6. The Consultant will not discriminate against any employee or applicant for employment because of race, color, religion, sex, or national origin. 7. The Consultant shall comply with the California Labor Code. 8. The Consultant shall comply with the Copeland Antikickback Act (18 USC 874 C) and the implementation regulation (29 CFR 3) issued pursuant thereto, and any amendments thereof. 05/19/2025 PROPOSAL FOR DESIGN OF SYCAMORE CANYON PARK PEDESTRIAN BRIDGE REMOVAL CITY OF DIAMOND BAR CIP NO. FP25508 MAY 2025 Table of Contents Scope of Work ………………………………………………………… Design Concept ……………………………………………………… Project Team ………………………………………………………….. Company Overview & Team Leaders ………………………. Relevant Experience ……………………………………………….. Work Schedule ……………………………………………………….. Man-Hour & Fee Estimate ………………………………………. 05 06 12 13 14 17 18 Scope of Work The subject project is located at 22930 Golden Springs Drive, at the southeast corner of Golden Springs Drive and Sycamore Park, within the City of Diamond Bar, California. This project involves the demolition and removal of an existing pedestrian bridge that was originally constructed in the 1960s. The structure has suffered significant deterioration due to age, prolonged weather exposure, and termite damage. In addition to the bridge removal, the following components are included in the project scope: 1.Reroute the electrical conduit currently attached to the bridge, which powers a nearby streetlight. 2.Establish an alternate pedestrian route to the trailhead and park path following bridge removal. 3.Relocate the swing gate and signage to preserve vehicle restrictions. Design Concept Our design approach is rooted in sustainability, minimal site disturbance, and cost efficiency—both during construction and long-term maintenance. The project unfolds in three key phases, strategically planned to maintain site functionality and safety throughout. Phase 1: Infrastructure Continuity The first priority is to secure an alternate power source for the existing streetlight currently reliant on the pedestrian bridge's electrical conduit. We will evaluate options for rerouting the conduit underground or replacing the streetlight with a solar-powered one, ensuring reliable service while minimizing excavation and disruption to surrounding vegetation and hardscape. 1 2 3 Design Concept Phase 2: Pedestrian Access Reconfiguration To maintain uninterrupted access to the trailhead and park path, a new pedestrian access point will be established. This includes the relocation of the existing swing gate and associated signage to a position that ensures both accessibility and controlled vehicle entry to maintenance areas. The new alignment will be designed to blend with the natural topography and existing trail system. Phase 3: Bridge Removal and Site Restoration With access and power concerns addressed, the final step is the safe and complete removal of the deteriorated pedestrian bridge. The removal process will be carried out with minimal ecological disruption, using equipment and methods suited to the site’s constraints and environmental sensitivity. Debris will be responsibly managed and removed off-site in accordance with local regulations. 1 2 3 Design Concept Guiding Principles Our two core goals—minimal disturbance and cost-effectiveness—inform every aspect of this project. By avoiding large-scale grading or excessive hardscape, we not only protect the site's integrity but also reduce long-term maintenance burdens for the City. Path Continuity and Gate Relocation The new pedestrian path will extend the existing walkway delineated by white edge lines along the driveway. This design minimizes grading to reduce site disturbance. By continuing the existing white striping, the visual continuity is preserved, providing a clear and consistent cue for pedestrians. Additionally, the existing signage and gate will be relocated farther from the parking area and positioned closer to the waste disposal enclosure to better align with the new circulation pattern. Design Concept Slope Stabilization Strategy A key concern following the bridge removal is ensuring long-term slope stability. Our approach prioritizes bioengineering techniques that leverage the natural stabilizing power of plant root systems. In consultation with professionals, we will select native plant species capable of stabilizing the slopes through their root structures. Our goal is to create a living, self-sustaining system that reinforces soil structure, reduces erosion, and enhances habitat value. If additional stabilization is required, we will consider hybrid methods such as vegetated riprap or geotextile-reinforced planting, which combine structural reinforcement with vegetative cover. Design Concept Low-Impact Power Alternatives To maintain power to the streetlight, we are considering replacing the existing fixture with a solar-powered alternative. This upgrade would eliminate the need for ground disturbance and costly excavation, while also enhancing the sustainability of the park’s infrastructure. Although solar streetlights may have a higher initial cost compared to traditional grid-connected systems, they offer significant long-term savings and environmental benefits, including energy independence and reduced carbon emissions. If the solar option proves insufficient, a secondary solution involves rerouting the electrical conduit southward, closer to the trailhead. This alternative route avoids disruption to the nearby creek and the protected trees surrounding the existing bridge location. Solar-powered Streetlight Example Specs for Reference SCL2 Series First Light Technologies Ltd. www.firstlighttechnologies.com Design Concept Project Team Principal oversees major decisions and ensures the project aligns with firm goals and contractual obligations. Architect leads the design development process, creates architectural plans. Designer / Project Manager supports design development and manages day-to-day project activities, schedule, and team coordination. Estimator performs cost analysis. Electrical Engineer design power reconfiguration. Other Consultants provide specialized expertise based on project needs. Company Overview & Team Leaders Andy Su - Principal Andy Su earned his B.S. in Construction Engineering Technology from California State Polytechnic University, Pomona, in June 2011. Following graduation, he worked with multiple developers, gaining valuable industry experience that laid the foundation for the establishment of YW Rising Builders Inc., which he co-founded with his partners. Andy holds General A, B, C10, and C21 contractor licenses in California, reflecting his broad qualifications in general and specialized construction disciplines. Sharon Zhang - Architect Sharon Zhang received her Bachelor of Architecture degree from Tongji University, China, in 1998, and obtained her architect license there in 2001. She later pursued a Master of Science in Architecture at Mississippi State University (2002–2003). After gaining significant professional experience, Sharon became a licensed architect in California in 2011. She brings extensive expertise in the design and development of single-family and multi-family residential projects, as well as commercial centers. Founded in 2015, YW Rising Design & Development provides comprehensive construction document design packages for both residential and commercial buildings. Our team brings deep experience and technical expertise in Tenant Improvement Plans, Residential Renovation Plans, and the legalization of unpermitted renovations. We operate with a value-driven philosophy that turns ideas into thoughtful, well-planned, and successfully executed construction projects. Our work is defined by efficiency, accuracy, and a strong commitment to quality. We believe that true client satisfaction stems from a balance of expertise, attention to detail, and reliable communication. Our mission is to deliver designs that meet or exceed client goals, while minimizing revisions to help streamline the permitting process and fast-track construction timelines. Relevant Experience Project Title: Water Meter Public Wall Permit Project Address: 16344 Canon Ln, Chino Hills, CA Scope of Work: 1. Design and install two new water meters and water line per city’s standards. 2. Restore street to existing condition per city’s standards. Reference: Johnathan Ma 909-610-5075 johnathanirn@hotmail.com Relevant Experience Project Title: Torrence 21-Unit Condo Project Address: 1022 W 223rd Street, Torrence, CA Scope of Work: Construct a 21-unit condo Reference: Emily Cheng 951-867-8649 emilycheng1219@gmail.com Relevant Experience Project Title: Monterey Park Custom Homes Project Address: 1720 S Orange Ave, Monterey Park, CA Scope of Work: Construct five new custom homes Reference: Paul Cheung 626-757-4645 paulc888@gmail.com Work Schedule Task Description Finalize Schematic Design: Collaborate with the City to confirm major design decisions. Design Development: 1. Prepare site plan, demolition plan, and improvement plans. 2. Develop design details for new pedestrian access, swing gate, and signage relocation. Construction Documents: 1. Develop electrical plan showing conduit rerouting and connections. 2. Refine and finalize all construction drawings based on City feedback. WEEK 1 WEEK 2 WEEK 3 WEEK 4 WEEK 5 WEEK 6 Finalize Schematic Design Design Development Construction Documents Man-Hour & Fee Estimate Title Hourly Rate Hours Total Principal $150/hr 60 $9,000 Architect $130/hr 80 $10,400 Designer / Project Manager $100/hr 120 $12,000 Estimator $110/hr 20 $2,200 Electrical Design & Plans Lump Sum N/A $1,000 TOTAL $34,600