20160715 Ver 1_More Info Received_20161030

Homewood, Sue
From: Trey Morgan <[e-mail]>
Sent: Sunday, October 30, 2016 2:54 PM
To: Homewood, Sue
Cc: Mark Romulus; [e-mail]; Scott Friedman; Randall Bell
Subject: Re: Additional Information -Peace Haven Village
Attachments: image001.png; image003.png; image005.png; image013.png; image014.png; image015jpg;
image016.png; image017.png; image018.png; image019.png; image022.png; C-5.1
SKETCH.PDF
Importance: High
Sue:
trust all is well on your end. I understand from Mark you were out at the end
of last week, and back in the office on Monday. Below is our response to your
recent inquiries, and we are providing several exhibits for reference (due to
size, I will send in separate emails).
We have analyzed the possibility of re -engineering the storm water system so
that some amount of flow is allowed to recharge the west and middle stream
as discussed. It is possible to re -direct the low -flow orifice from the proposed
detention pond outlet control structure to the western stream, while
maintaining larger flows to current outfall discharge point. This would mean 2
pipes through the pond embankment (new 6" pipe w/ 4" orifice to western
stream; 24" pipe to pond outfall as currently designed). It would take about
300 LF of additional 6" pipe with a 4" orifice; concrete headwall (or 2). This
would provide about 0.7 cfs of additional flow to the western stream during the
2-year storm event. Under this scenario, the entire 1-yr storm event will pass
through the low -flow orifice. That means the entire volume of runoff from your
typical storm events throughout the year will be completely routed back to the
western stream. The detention pond will release this flow at a lower rate, but
over a longer period of time. We have attached a sketch which shows how this
would work.
1

If this proposal is acceptable, we are willing to work through the various
jurisdictions to amend the civil plans accordingly. However, Sue, our major
issue is time. To accommodate this change, we would request that the 401
permit be issued (provisionally or otherwise) with this change, and we would
provide the final drawings post -issuance. No construction on the pond would
begin until the plans are modified, approved and delivered to you, but we
would be able to start our demolition, clearing, and erosion control in the
meantime while bringing in a good deal of fill. The County will not schedule our
pre -construction meeting without receipt of this permit, and we have already
held off that meeting for a week trying to address and analyze these ecological
issues.
If the permit cannot be issued as described above, then in lieu of the proposed
design change, we will agree to mitigate the 168 lineal feet of perennial stream
(on our property and the YMCA property) and the cost is approximately
$48,000 per the schedule we reviewed. We would make the payment
immediately in hopes of expediting the permit this week.
Either outcome is acceptable to us, so the option we select is dependent on
your decision regarding the permit timing. We are happy to redesign or
mitigate, and simply hope to expedite the timeline as best we can. I have asked
Mark to follow up with you Monday morning, and we are happy to get
everyone on our team on the phone to discuss if needed. We are also available
to come to your office this week to meet with you and/or your team if that is
helpful.
We appreciate your time and attention to this matter, and we look forward to
finalizing this permit and the process to your satisfaction.
Best regards,
Trey

VICINITY MAR
Sew
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