HomeMy WebLinkAboutSDP201200017 Review Comments Final Site Plan and Comps. 2013-07-31COUNTY 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:
(Rev1)
Date of comments:
(Rev])
Reviewer:
Review coordinator:
Riverfront Townhomes
SDP201200017
Dominion Engineering [fax 434 - 979 -1681]
South Pantops II Land Trust; Charles [fax unknown]
W. Hurt & Shirle Fisher Trs
16 March 2012
21 May 2013
10 April 2012
31 July 2013
Michael Koslow
Megan Yaniglos
The second final site plan and comps submittal (SDP201200017) submitted 21 May 2013 has
received Engineering Review and do not appear to meet Albemarle County minimum checklist
items for approval. Please adequately address the following comments for final approval:
A. Existing Conditions Information
1) Please field verify existing topography and note as much on the plans. Existing
topography must be field reviewed within one calendar year of each submittal.
(Rev]) Comment has been addressed.
2) (Revl) Easement for greenway trail at Rivanna River has been granted and trail has been
built. Please update topo and plan notes on sheets SP4 and SP5 to reflect this.
B. Proposed Plan View Information
1) Proposed slopes steeper than 3:1 require low maintenance (not grass) ground cover.
Please note as much on the Landscape Plan.
(Rev-1) Comment has been addressed.
2) Please indicate guardrail end section type for proposed guardrail adjacent to South
Pantops Drive and townhome access road.
(Rev-1) Comment has been addressed.
3) Please provide VDOT equivalent or detail for guardrail proposed adjacent to townhome
access road.
(Rev]) Comment has been addressed.
4) Please indicate tree clearing in areas of proposed drainage easements with proposed
enclosed drainage to allow for excavation.
(Rev]) Tree clearing does not appear to be indicate on sheet SPIT; please indicate
this by note or graphically.
5) VDOT approval will be required for all construction on existing VDOT facilities (i.e.
Engineering Review Comments
Page 2 of 4
South Pantops Drive).
(Revl) Comment has been acknowledged.
6) Please provide proposed pavement marking plan for South Pantops drive to include a 12:1
minimum taper for turn lane into this proposed development.
(Rev]) Comment has been addressed.
7) Please label radius for proposed turnaround behind unit 14. Please document ability for a
passenger vehicle to turn around at the end of the townhome access road.
(Rev]) Comment has been addressed.
8) Please provide a minimum radius of 12.5' from public entrance road to unit 1 driveway
(currently this is 2').
(Rev]) Applicant appears to be proposing to subdivide property into townhom es. This
means that proposed Backwater Alley is proposed to serve 6 or more parcels. This
means that Backwater Alley must conform with applicable VDOT standards or to
satisfaction of county engineer (14- 412.A.3b). Please reconfigure this entrance to
include a minimum 12.5' radius.
9) Please provide a minimum of 18' between the unit 1 driveway and the radius return for the
public entrance road to allow adequate maneuverability for owner onto unit 1 driveway.
(Rev]) Applicant appears to be proposing to subdivide property into townhom es. This
means that proposed Backwater Alley is proposed to serve 6 or more parcels. This
means that Backwater Alley must conform with applicable VDOT standards or to
satisfaction of county engineer (14- 412.A.3b). Please see attached sketch — given
minimal traffic proposed to entrance, with a 12.5' radius, no additional setback is
required.
10) Please provide a profile for the townhome access road or spot elevations to determine the
pavement slope in front of Structure STR -6. Pavement slope should match Pave X-
slope shown on stormwater inlet calculations on sheet SP9.
(Rev]) Comment has been addressed.
11) Please provide dimensions for existing riprap outfall for project to confirm there is
sufficient outlet protection.
(Rev]) Comment has been addressed.
12) Recommendation — Unit 1 appears to be 2' from existing access easement. This is a
setback violation per definition of setback in Albemarle County Code [18 -3.1]:
Setback: The distance by which any building or structure is separated from any street, road or
access easement. (Amended 7 -1 -81)
(Rev]) Comment has been addressed.
C. Plan Detail Information
.vide pavement designs for widening of South Pantops Drive utilizing
VDOT procedures.
(Rev]) Comment has been addressed.
Engineering Review Comments
Page 3 of 4
2) Please provide pavement design for townhome access road utilizing ITE Trip
Generation Handbook and VDOT Pavement Design Guide For Subdivision And
Secondary Roads In Virginia or equivalent.
(Rev]) Comment has been addressed.
3) Please provide a proposed pavement section detail for townhome access road.
(Rev]) Comment has been addressed.
4) Please specify a minimum depth of 4" of stone base under proposed sidewalk.
Please specify a minimum concrete strength of 3000 psi at 28 days for proposed
sidewalk.
(Rev]) Comment has been addressed.
5) Please show a detail for proposed dumpster pad including a minimum of 4" stone
base and 6" of 3000 psi concrete at 28 days or stronger, reinforced with a minimum grid
of wire reinforcing or #4 bars at 12" on center.
(Rev]) Comment has been addressed.
6) Please specify typical retaining walls referenced from plan. A typical
manufacturer's drawing for segmental block walls, or VDOT reference, is acceptable,
with safety railing or guardrail shown.
(Rev]) Comment remains. Please provide a typical detail of type of wall proposed (does
not need to be manufacturer specific).
D. Drainage Profiles
1) Please revise the labels on drainage profiles on sheet SP9 to reflect structure names shown
on sheet SP5.
(Rev]) Comment has been addressed.
2) Please label the throat lengths for Structure STR -3 and Structure STR -6. Lengths should
match lengths of Curb Openings on Stormwater Inlet Calculations shown on sheet SP9.
(Rev]) Comment has been addressed.
3) Please revise drainage profiles to obtain a maximum slope of 16% for all enclosed
drainage structures or include concrete anchor blocks for affected pipe runs and structures.
(Rev]) Comment has been addressed.
4) Please indicate required inlet shaping with "IS" for all proposed structures with height
greater than 4'.
(Rev]) Comment has been addressed.
5) Please indicate safety slabs with "SL -1" for any structure taller than 12'.
(Rev]) Comment has been addressed.
6) There appears to be a typo on the invert elevation label for Structure STR -2. Invert In
with elevation 395.81 appears to be labeled Invert Out. Please correct or advise.
(Rev]) Comment has been addressed.
Engineering Review Comments
Page 4 of 4
E. Drainage Computations
1) Please identify storm event frequency used with Storm Drain Calculations and Stormwater
Inlet Calculations on sheet SP9.
(Rev]) Comment has been addressed.
2) Please revise enclosed drainage design to reduce maximum outlet velocity to 15 fps.
(Rev1) Comment remains. Please revise enclosed drainage design for pipe runs 3- 2,2 -1,
and 6 -5 to reduce the maximum outlet velocity to 1 S fps.
Current Development Engineering is available from 2:30 -4 PM on Thursdays to discuss these review
comments. Please contact Michael Koslow at 434 - 296 -5832 ext. 3297 or email mkoslow&albemarle.org
to schedule an appointment.
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