HomeMy WebLinkAboutRE_ EXTERNAL_ BMPs_Erosion Control Canyon Loop trail Improvement Project (3)Good morning Alan and Ryan,
Thank you for speaking with Hal regarding the SWPPP requirements for the Canyon Loop Trail project. Based on your conversation, we have a mutual understanding that a SWPPP is not required
for this project given the total disturbed area is less than one (1) acre. Please let us know if you need anything from the City before responding back to the State.
Fabian P. Aoun, P.E. | Associate Engineer
909.839.7038 | faoun@diamondbarca.gov <mailto:faoun@diamondbarca.gov>
From: Fabian P. Aoun
Sent: Wednesday, November 30, 2022 3:58 PM
To: 'Winkleman, Ryan' <Ryan.Winkleman@mbakerintl.com>; Ashimine, Alan <aashimine@mbakerintl.com>
Cc: Hal Ghafari <HGhafari@DiamondBarCA.Gov>
Subject: RE: EXTERNAL: BMPs/Erosion Control Canyon Loop trail Improvement Project
Hi Ryan, thank you for forwarding this.
Alan, if you are able to reach out today, you can call me at the number below. if you’re unable to reach out until tomorrow, please call Hal Ghafari at 909-839-7044.
Fabian P. Aoun, P.E. | Associate Engineer
909.839.7038 | faoun@diamondbarca.gov <mailto:faoun@diamondbarca.gov>
From: Winkleman, Ryan <Ryan.Winkleman@mbakerintl.com <mailto:Ryan.Winkleman@mbakerintl.com> >
Sent: Wednesday, November 30, 2022 3:43 PM
To: Ashimine, Alan <aashimine@mbakerintl.com <mailto:aashimine@mbakerintl.com> >
Cc: Fabian P. Aoun <FAoun@DiamondBarCA.Gov <mailto:FAoun@DiamondBarCA.Gov> >
Subject: Fwd: EXTERNAL: BMPs/Erosion Control Canyon Loop trail Improvement Project
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Alan,
Please reach out to Fabian below when you have a chance. I understand from our conversation that this is not likely to be until tomorrow.
Thanks!
Ryan Winkleman
Senior Biologist/Project Manager
949-533-0918
This email was sent from my phone. If you need to immediately reach me, please call the number above.
________________________________
From: Fabian P. Aoun <FAoun@DiamondBarCA.Gov <mailto:FAoun@DiamondBarCA.Gov> >
Sent: Wednesday, November 30, 2022 2:48:19 PM
To: Winkleman, Ryan <Ryan.Winkleman@mbakerintl.com <mailto:Ryan.Winkleman@mbakerintl.com> >
Cc: Ryan Wright <RWright@DiamondBarCA.Gov <mailto:RWright@DiamondBarCA.Gov> >; Hal Ghafari <HGhafari@DiamondBarCA.Gov <mailto:HGhafari@DiamondBarCA.Gov> >; Anthony Jordan <AJordan@DiamondBarCA.Gov
<mailto:AJordan@DiamondBarCA.Gov> >
Subject: RE: EXTERNAL: BMPs/Erosion Control Canyon Loop trail Improvement Project
No worries at all, I will be available at that time.
Thanks!
Fabian P. Aoun, P.E. | Associate Engineer
909.839.7038 | faoun@diamondbarca.gov <mailto:faoun@diamondbarca.gov>
From: Winkleman, Ryan <Ryan.Winkleman@mbakerintl.com <mailto:Ryan.Winkleman@mbakerintl.com> >
Sent: Wednesday, November 30, 2022 2:44 PM
To: Fabian P. Aoun <FAoun@DiamondBarCA.Gov <mailto:FAoun@DiamondBarCA.Gov> >
Cc: Ryan Wright <RWright@DiamondBarCA.Gov <mailto:RWright@DiamondBarCA.Gov> >; Hal Ghafari <HGhafari@DiamondBarCA.Gov <mailto:HGhafari@DiamondBarCA.Gov> >; Anthony Jordan <AJordan@DiamondBarCA.Gov
<mailto:AJordan@DiamondBarCA.Gov> >
Subject: RE: EXTERNAL: BMPs/Erosion Control Canyon Loop trail Improvement Project
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Hi Fabian,
I’m sorry, you called right around the same time as somebody else and I didn’t see your voicemail. I just listened to it. I’m about to leave to pick up my son from school but I can call
you in about an hour or so.
Ryan Winkleman | Project Manager/Senior Biologist/Certified Senior Ecologist
5 Hutton Centre Drive, Suite 500 | Santa Ana, CA 92707 | [O] 949-330-4115 | [M] (949) 533-0918
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From: Fabian P. Aoun <FAoun@DiamondBarCA.Gov <mailto:FAoun@DiamondBarCA.Gov> >
Sent: Wednesday, November 30, 2022 2:42 PM
To: Winkleman, Ryan <Ryan.Winkleman@mbakerintl.com <mailto:Ryan.Winkleman@mbakerintl.com> >
Cc: Ryan Wright <RWright@DiamondBarCA.Gov <mailto:RWright@DiamondBarCA.Gov> >; Hal Ghafari <HGhafari@DiamondBarCA.Gov <mailto:HGhafari@DiamondBarCA.Gov> >; Anthony Jordan <AJordan@DiamondBarCA.Gov
<mailto:AJordan@DiamondBarCA.Gov> >
Subject: RE: EXTERNAL: BMPs/Erosion Control Canyon Loop trail Improvement Project
Hi Ryan,
I left you a message earlier regarding the email chain below. could you give me a call when you get the chance? I will be out of town starting tomorrow 12/1 and will return on 12/7.
We can touch base next week if we are unable to chat today.
Fabian P. Aoun, P.E. | Associate Engineer
909.839.7038 | faoun@diamondbarca.gov <mailto:faoun@diamondbarca.gov>
From: Anthony Jordan
Sent: Tuesday, November 29, 2022 8:09 AM
To: 'Winkleman, Ryan' <Ryan.Winkleman@mbakerintl.com <mailto:Ryan.Winkleman@mbakerintl.com> >
Cc: Greg Gubman (GGubman@DiamondBarCA.Gov <mailto:GGubman@DiamondBarCA.Gov> ) <GGubman@DiamondBarCA.Gov <mailto:GGubman@DiamondBarCA.Gov> >; Ryan Wright <RWright@DiamondBarCA.Gov <mailto:RWright@Diam
ondBarCA.Gov> >
Subject: RE: EXTERNAL: BMPs/Erosion Control Canyon Loop trail Improvement Project
Ryan,
At the start of the project, some BMPs were installed. These consisted mostly of a gravel bed at the trail entrance (maintenance easement which is being used for project access), to
prevent tracking soil onto the street and into the storm drain system. Additionally, the contractor placed drip pans beneath stationary equipment to contain drips/fluid loss.
Regarding erosion, most if not all of the erosion noted along the trail would have taken place anyway with or without the project. Historically, we deal with these eroded areas a few
times per year after significant rain events. As Dick Fisher stated in an earlier email response, part of the design/improvements are to help reduce if not eliminate trail erosion.
I will discuss this with the contractor and determine what can be done within reason to prevent or reduce this while the project is ongoing. To be fair, it is not reasonable to expect
the contractor to be able to completely prevent this but I will ask that he puts forth a concerted effort.
As we are all aware, one of the main purposes of the BMPs is to prevent sediments and pollutants from entering the storm drains. Given the proximity of the project to any storm drain
elements, there is likely no concern that runoff from the site could potentially impact any storm drains. That being said, as you mentioned below, the side casted material and its impact
on the adjacent vegetation is most likely the focus of this concern. BMPs had not been placed by these material stockpiles at the time of the rain to my knowledge nor am I aware of
any appreciable runoff there. I will be on site today to review and discuss the plan moving forward to mitigate migration of the material into the adjacent vegetation.
Regards,
Anthony Jordan | Maintenance Superintendent City of Diamond Bar | Public Works
909.839.7063
From: Winkleman, Ryan <Ryan.Winkleman@mbakerintl.com <mailto:Ryan.Winkleman@mbakerintl.com> >
Sent: Monday, November 28, 2022 5:26 PM
To: Anthony Jordan <AJordan@DiamondBarCA.Gov <mailto:AJordan@DiamondBarCA.Gov> >
Cc: Ryan Wright <RWright@DiamondBarCA.Gov <mailto:RWright@DiamondBarCA.Gov> >; Richard Fisher <rfisher@rfaland.com <mailto:rfisher@rfaland.com> >
Subject: RE: EXTERNAL: BMPs/Erosion Control Canyon Loop trail Improvement Project
CAUTION: This message originated outside of our City of Diamond Bar network.
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Thank you, Anthony. Would you agree then from your email below that Danny did not implement BMPs previously, if there was significant erosion following previous rain events? I can respond
to FWS that the contractor did not install BMPs previously but will install them prior to the next rain event later this week, I just want to make sure that what I say is accurate and
that you’re in agreement since I’m putting it in writing. I assume the BMPs will include silt fencing, wattles, and other methods to contain soil and/or prevent large rills or erosional
features from developing. Looking at the photos that have been sent to the City and to the agencies, I think the concerns that they’re voicing are that sediment has just been sidecast
into areas that are otherwise supposed to be untouched. I don’t know how to resolve that short of pulling it all back very carefully at the end of the project, but they can at least
attempt to prevent it from going in deeper into the vegetation from rainfall, particularly the larger mounds that have been built up.
Ryan Winkleman | Project Manager/Senior Biologist/Certified Senior Ecologist
5 Hutton Centre Drive, Suite 500 | Santa Ana, CA 92707 | [O] 949-330-4115 | [M] (949) 533-0918
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From: Anthony Jordan <AJordan@DiamondBarCA.Gov <mailto:AJordan@DiamondBarCA.Gov> >
Sent: Monday, November 28, 2022 4:19 PM
To: Danny Daher <acecd99@gmail.com <mailto:acecd99@gmail.com> >
Cc: Ryan Wright <RWright@DiamondBarCA.Gov <mailto:RWright@DiamondBarCA.Gov> >; Richard Fisher <rfisher@rfaland.com <mailto:rfisher@rfaland.com> >; Ashimine, Alan <aashimine@mbakerintl.com
<mailto:aashimine@mbakerintl.com> >; Winkleman, Ryan <Ryan.Winkleman@mbakerintl.com <mailto:Ryan.Winkleman@mbakerintl.com> >; Ryan McLean <RMcLean@DiamondBarCA.Gov <mailto:RMcLean@DiamondBarCA.Gov>
>
Subject: EXTERNAL: BMPs/Erosion Control Canyon Loop trail Improvement Project
Good afternoon Danny,
Per the approved plans, specifications and special provisions of the subject project, eroded sediments shall be retained on site. During the most recent rain event on the trail, several
areas experienced significant erosion. As such, please install erosion control measures as required to prevent any further erosion prior to the next rain event. Please reach out to
me with any questions or concerns. If you would prefer, I am happy to meet with you on site to discuss.
Regards,
<https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.diamondbarca.gov%2F&data=05%7C01%7CRyan.Winkleman%40mbakerintl.com%7C40301c22d7a9444d2b1008dad324fb7f%7C4e1ee3db4df64142b7b9bec1
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Anthony Jordan Maintenance Superintendent
City of Diamond Bar | Public Works Department
21810 Copley Drive, Diamond Bar, CA 91765
t 909.839.7063 | 909.839.7000 main | f 909.861.3117
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