HomeMy WebLinkAboutFDP201900016 Correspondence 2020-03-30Frank Pohl
From: Mike Myers <mike@30scale.com>
Sent: Monday, March 30, 2020 11:35 AM
To: Frank Pohl
Cc: John Anderson; Steven Lowe; Steve Barber; Robert Krumpen; Tina Taylor
Subject: Jacobs Creek Flood Study Resubmission FDP 201900016
Attachments: RE: Planning Application Review for FDP201900016 Jacobs Creek Flood Study.
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Frank, Here is a LINK to the below files that shall be our resubmission of the Flood Study
for Jacobs Creek.
• Flood Study Plans dated 3/30/20
• Flood Study Engineering Report dated 3/30/20
• HEC-RAS files
• Structural Engineering Permit Plan
Here is how we addressed your comments:
Engineering Comments:
- Bridge may need to be wider than 10-ft to meet fire rescue standards. I have
forwarded on the plans for Fire Department review.
Shawn Maddox accepted 10-foot clear (see attached email). The bridge has
been widened to 11-feet, since we have also added a 6"-wide guide rail on
either side of the bridge.
- Sheet 2 of 7 - Section Z-Z - two 10-yr elevations are shown, should one of
these be the 100-yr elevation?
Section Z-Z has been corrected. The topmost elevation is the 100-yr WSE.
- Remove dimensions of abutments/foundations unless this matches the final
design by the structural engineer. Structural engineering drawings are required
to be submitted before approval to ensure the bridge area impeding flow
matches.
The dimensions have been updated to match the final design by the structural
engineer.
- Bridge will most likely include guide rails on each side, which will decrease
the area of flow. Update model to include the guards once structural design is
complete or near complete. Provide the 'blockage/fill' area at each bridge
section (for the proposed condition).
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6x6 pressure treated guide rails have been added to each side of the
bridge. The model has been updated to include the guide rails. Also, the fill
area has been noted at each bridge section for the proposed condition (and the
existing condition).
- Owner may want to consider paving bridge approaches to eliminate concern
of washout of gravel.
Acknowledged.
Thanks for taking the time to review this as we look forward to getting started on the
construction over the next couple of weeks.
Michael Myers, PE, CFM 30 Scale, LLC C: 4.s4-242-2866 I Web: 30Scale.com
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