U-5785 U-5870 Fire Tower Road Widening Outlet analysis for SB area

Carpenter, Kristi
From: Beauregard, Rachelle L
Sent: Thursday, March 14, 2019 1:44 PM
To: Ward, Garcy
Cc: Andy Howell
Subject: U-5785/U-5870 Fire Tower Road Widening Outlet
analysis for SB area
Attachments: Outlet_Analysis_1306_combined.pdf, U5870
_hyd_psh13.pdf
G a rcy,
As discussed earlier this week, below and attached is the information you
requested about the drainage outlet along Stream SB to the west of Eastern
Pines Drive on the U-5870 corridor.
Current Drainage Plan for PSH 13
o Admittedly, the "Swale Data" could be better organized, but there
are some numbers with regards to length of swale provided.
o I've provided additional labels in blue to report drainage area at
various locations of interest both entering and leaving the
ROW. I've also tried to provide some clarification as to what
portion of the DA is "offsite" vs. DA coming from the NCDOT
ROW.
Outlet Analysis for a point just downstream of Structure 1306 (includes
both existing 36" drainage outlets)
o This is likely more information than you need, but it does provide
numbers for existing vs. proposed "paved DA", which corresponds
to the additional impervious area added to the drainage outlet by
the NCDOT widening project
Please let us know your thougths on this and what will be required at this site for
buffer rules.
Rachelle
Rachelle Beauregard
Project Manager
252 439 2824 office
919-239-7168 direct
rlbeau reaard(cDncdot.aov
NCDOT Division 2
1037 W.H. Smith Blvd.
GREENVILLE, NC 27834

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