HomeMy WebLinkAboutRE_ EXTERNAL_ Fw_ _EXTERNAL_ Photos of Canyon Loop Trail Work_ Diamond Bar (3)CAUTION: This message originated outside of our City of Diamond Bar network.
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Hi Lauren,
Thank you for the notification, I appreciate it! I apologize for the delayed response as well, I’ve been out of the office.
Regarding the two points below:
1. The project is designed to reduce and/or prevent future trail erosion, which has historically been an issue with the trail. The City has in the past required a contractor to come
out to regrade the trail after rains due to the ruts and rills that develop following big events. Regarding current erosion control BMPs, earlier rainfalls this season mostly occurred
prior to the bulk of the grading on the project, so there was minimal, if any, erosion of project materials during previous rain events. The surrounding areas are generally at relatively
flat grades with the trail anyway, which further reduces possibilities for erosion outside of a few steep areas. Unfortunately some material has been side cast during the construction
process. The City’s Maintenance Superintendent has directed the contractor to install appropriate BMPs today and tomorrow before the next forecasted rains this Thursday to prevent any
of the current stockpiles/material from eroding into adjacent vegetation, and this will be a consideration moving forward as well. Excess materials will also not be left in place and
will be removed before the project is complete.
2. The project is being built according to plan. This calls for an area wider than 5 feet to be cleared during construction in areas where the cross-slope grade immediately adjacent
to the final trail bed does not fall within the requisite 2% minimum and 5% maximum cross-slope grades against the new trail. These areas will not be left bare like this and they will
not constitute a part of the future trail. The final trail width will be 5 feet. Once the adjacent areas, where necessary, have been fine-graded to the correct level they will then
be pulled back and reseeded with the “native erosion control mix <https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fwww.ssseeds.com%2fproduct%2fBasic-Native-Erosion-Control-Mix.aspx&c=E,1,kZa14kV5
CG0DTlKYc2a9mDMt4ghs9EpbZwfffobIm4512sZNRvqif8N1V5Qje5Hb6L9PBc3xHIjBVY9Re3pYv5XfWD6Y_dB8nxMSIrcPP_7E0jc8BdhtE3vBKdY,&typo=1> ” from S&S Seeds to further control future erosion along
the sides of the trail. These “expanded” areas were what were calculated and sent to the Service as permanent impacts and they are what will be mitigated through an HMMP. The current
permanent impacts to CSS vegetation along the sides of the trail are still well within what was calculated and presented to the Service during our earlier conversations a couple months
ago.
a. Of 0.009 acre of California sagebrush – black sage scrub that was calculated for impacts, the project has permanently removed 0.0049 acre.
b. Of 0.128 acre of disturbed California sagebrush – black sage scrub that was calculated for impacts, the project has permanently removed 0.0572 acre.
c. Of 0.050 acre of coast prickly pear scrub that was calculated for impacts, the project has permanently removed 0.0159 acre.
These are current prior to today. There was some minor grading today that I don’t have the numbers for yet. Again, these are the areas that have been widened along the trail and that
are currently being questioned in the correspondence you received from Robb et al. They were what was factored in as permanent impacts in the numbers we previously provided to you and
they’ll be mitigated for on-site.
Please let me know if you have any other questions, and please confirm that you’ll handle the ITP response on your end. Thank you!
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: Kershek, Lauren <lauren_kershek@fws.gov>
Sent: Monday, November 28, 2022 1:10 PM
To: Winkleman, Ryan <Ryan.Winkleman@mbakerintl.com>
Subject: EXTERNAL: Fw: [EXTERNAL] Photos of Canyon Loop Trail Work, Diamond Bar
Hi Ryan,
I wanted to give you a heads up that we've gotten a complaint from a concerned citizen about the impacts associated with the Canyon Loop Project. We just wanted to check in and make
sure everything is being implemented as laid out in the MND. The specific concerns appear to be regarding the erosion control BMPs and width of the trail. If you could confirm that
the project is being built as planned and that all BMPs are appropriately placed, we would greatly appreciate it and we will be happy to prepare a response regarding the ITP question.
Lauren Kershek (she, her, hers)
Fish and Wildlife Biologist
U.S. Fish and Wildlife Service
2177 Salk Ave, Ste 250
Carlsbad, CA 92008
(760)431-9440 x208*
*I am working mostly from home and infrequently checking my office voicemail. Email is the best way to reach me if you'd like to schedule a call or meeting.
________________________________
________________________________
From: Robert Hamilton <robb@hamiltonbiological.com <mailto:robb@hamiltonbiological.com> >
Sent: Sunday, November 20, 2022 7:31 PM
To: Snyder, Jonathan <Jonathan_d_Snyder@fws.gov <mailto:Jonathan_d_Snyder@fws.gov> >
Cc: Lee Paulson <lee@silverlightpress.com <mailto:lee@silverlightpress.com> >; Cynthia Robin Smith <diamondbarbeautiful@gmail.com <mailto:diamondbarbeautiful@gmail.com> >; Dan Silver
<dsilverla@me.com <mailto:dsilverla@me.com> >; Medak, Christine <Christine_Medak@fws.gov <mailto:Christine_Medak@fws.gov> >; Fritz Reiman, CDFW <Frederic.Rieman@wildlife.ca.gov <mailto:Frederic.Riem
an@wildlife.ca.gov> >; Erinn Wilson <Erinn.Wilson-Olgin@wildlife.ca.gov <mailto:Erinn.Wilson-Olgin@wildlife.ca.gov> >
Subject: [EXTERNAL] Photos of Canyon Loop Trail Work, Diamond Bar
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u start working on your insurances, business license, and submittals to avoid any delays after we receive the green light from City Council. I will provide more details as we go, but
hope this helps. Please let me know if you have any questions.
Thank You,
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Ryan Wright | Parks and Recreation Director
City of Diamond Bar | Parks and Recreation Department
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