HomeMy WebLinkAboutWPO201300028 Review Comments Stormwater Management Plan 2013-05-06�pF A
vt�r�1Q
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902 -4596
Phone (434) 296 -5832 Fax (434) 972 -4126
Project:
Plan preparer:
Owner or rep.:
Plan received date:
Plan received date
for Engineering review
Date of comments:
Reviewer:
Castle Hill Cider
Dominion Engineering [979 -8121 ]
Raymond Humiston LLC
9 Apr 2013
16 Apr 2013
1 May 2013
Michelle Roberge
I have completed the engineering review for WP02013 -28. Please see below for the following comments.
A. SWM Plan (WP0201300028)
1) The road elevation abutting the detention pond is below the 10 year water elevation. Also, it
does not appear that a detention pond is necessary at the proposed location. There are (2) - 24"
existing RCP pipes from Turkey Sag Rd draining south to a low spot. A proposed 15" culvert
drains to the same low spot, east of proposed road, before it enters existing culvert EX -1. One
solution is for the entrance to be flattened to a max of 4.5% for gravel to stay in tact and
establish a vegetative Swale for water quality west of proposed road.
2) Please provide the removal rate calcs.
3) Please address MS -19.
B. Erosion Control Plan (WP0201300028)
1) A VDOT permit is required for entrance improvements.
2) The location is not clear for the proposed road widening shown in inset on sheet S2. Please
provide a dimension from the intersection or stationing to locate improvements.
3) Please provide pavement sections for the following:
a. The proposed entrance
b. The road to be widened from comment 2
c. The new turnaround
4) Please provide a separate sheet with existing conditions and include items to be removed, such
as fence.
5) In conjunction with comment 1 from section A, SWM Plan, the diversion dike shall be
extended north and relocated outside limits of grading. Please show a high point to divert
clean water north and south.
6) Please place one sediment trap west of proposed road. Please provide calcs for sediment trap.
7) Please place a culvert inlet protection lined with rip -rap in horseshoe shape. Please provide
detail. See 3.08 in VESCH.
8) Please place a RWD approximately 10' before intersection to divert water from proposed road
to sediment trap. A slope drain can be placed behind this RWD to divert clean water from
diversion dike to culvert EX -1.
9) The construction entrance on plan is not 70' long. Please show on plan.
Engineering Review Comments
Page 2 of 2
10) Please provide dust control on plan.
11) Please provide the E &S narrative on plan.
Sincerely,
)PIA��
Michelle Roberge
File: E1_rp,esc,swm,fsp_GEB _ template.doc