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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:
Stonefield Block D2 - VSMP
Plan preparer:
WW Associates
Owner or rep.:
Albemarle Place EAAP, LLC
Plan received date:
20 Apr 2015
Date of comments:
29 May 2015
Reviewer:
Michelle Roberge
County Code section 17 -410 and Virginia Code §62.1- 44.15:34 requires the VSMP authority to
act on any VSMP permit by issuing a project approval or denial. This project is denied. The rationale is
given in the comments below. The application may be submitted for approval if all of the items below are
satisfactorily addressed. The VSMP application content requirements can be found in County Code section
17 -401.
A. VSMP (WP02014000096)
1) On page 24 the safety fence and silt fence have switched. It appears to be an error on linetypes.
See near primary construction entrance.
[Revision 1]Comment addressed.
2) Scale is wrong for sheet 24.
[Revision 1]Comment addressed.
3) Please clarify phasing either by stating in sequence of construction or on plan. It is not clear when
SB -1 will be removed. Place a note that states lots 46 -57 can be be built after the basin is removed.
[Revision 1]Comment addressed.
4) The diversion dikes are also located where townhomes will be constructed. This will not work if
lots will be graded to subgrade elevations. Show a sediment trap near the primary construction
entrance. Provide a note stating lots 62 -65 can be built after ST has been removed.
[Revision 1]Comment addressed.
5) I recommend making the secondary entrance the only construction entrance to make the previous
comment work.
[Revision 1]Comment addressed.
6) The RWD should be perpendicular to the road and not as an angle as shown.
[Revision 1]Comment addressed.
Engineering Review Comments
Page 2 of 4
7) Revise the PPP with the most updated and approved E &S. You can submit when plans are ready
to be approved.
[Revision 1]Comment addressed. This will need to be added to SWPP onsite.
8) The placement of geogrid for the retaining wall will encroach on the neighboring property. Please
address easements.
[Revision 1]Comment not addressed. Show encroachment lines on grading plan.
9) Please follow VDOT road standards with a crown. This will change the location of inlets. Please
note road plans will require approval prior to subdivision of lots.
[Revision 1]Comment partially addressed. Per our meeting,VDOT roll top curb and ribbon
curb are approvable. Provide plan view, front view and cross section of curb transitions:
roll top to CG -2, ribbon curb to CG -2.
10) Runoff from townhomes should be captured, as much as possible, with inlets within the roadway
rather than with roof drains. Please revise in conjunction with comment 9.
[Revision 1]Comment partially addressed. Show roof drains are sized for 10 year storm. See
in front of lots 81 -89.
11) The retaining walls should be designed to meet 30.7.5 if the walls were not approved on the ZMA
plans.
a) Retaining walls over 6' should be broken into stepped walls. The separation between walls
is 3'and shall be landscaped with screening shrubs planted on ten (10) foot centers.
b) Address 30.7.5 9(b)(3)(ii). As noted in comment 8, it appears the abutting parcels will be
impacted when constructing the retaining wall. Please note there appears to be a staircase to lot
2L. Also, there are accessory structures near the boundary line of lot 6R or 6L.
C) Address 30.7.5 9(c)(2), Width and location of benches. The reverse slope shall be
approximately 17% or flatter. The bench gradient to the outlet shall be between two (2)
percent) and three (3) percent.
[Revision 11 Comment addressed. The retaining walls are shown on an approved ZMA.
12) Show drainage easements for pipes connecting yard inlets to stormsewer system.
[Revision 11 Comment partially addressed. Show drainage easements for lots 81 -89.
13) For the lots near the retaining wall, the 10' -15' backyards show swales that divert runoff to yard
inlets. These swales need to function as swales long after construction. Issues arise when
homeowners decide to fence off property or build patios. With these assumptions, please
incorporate a stormsewer design that anticipates the assumption noted. Typically, inlets are shown
for every 3 lots. Also, show drainage easements through the yards.
[Revision 11 Comment addressed.
14) It will also be difficult to ensure positive drainage be to inlets in the backyards near the retaining
wall. Please field verify topo in this area and change grading if necessary. I recommend placing
spot elevations.
[Revision 11 Comment not addressed. Place spot elevations behind lots 3 -4, behind lots 26-
30, behind 38 -40.
15) Lots 22 -29 have runoff from the adjacent property. Yard inlets are shown to capture runoff, but
Engineering Review Comments
Page 3 of 4
inlets are prone to clogging. It appears overland relief is attempted between lots 26 -27, which is a
benefit. Please show more of a depression to YD -20 by creating a berm between lots 26 and 27.
You may need to increase inlet size to ensure maximum capture and avoid a micropool in a
backyard. Show ponding depth. Show another inlet at the bottom of hill to connect YD -20 to inlet
at road.
[Revision 11 Comment partially addressed. The spread for inlet 19 is 10'. Revise grading for
inlets 21 and 19. Show inlets are in a swale to inlet 20, then provide relief to drain between
lots 26 -27.
16) YD -21 has a 520 contour that creates a depression for the inlet; however, it does not appear that
YD -21 will capture much. It will most likely be picked up by YD -20. Please change contour 520
to show positive drainage to YD -20. Show only one depression towards YD -20. I recommend
moving these inlets closer to YD -20 depression.
[Revision 11 Comment partially addressed. The spread for inlet 19 is 10'. Revise grading for
inlets 21 and 19. Show inlets are in a swale to inlet 20, then provide relief to drain between
lots 26 -27.
17) It appears there is a general permit coverage letter for 26.3 acres. This covers blocks F, G & D.
Please note, the SWPP package was submitted under blocks G and will be stored with application
WPO201400102.
[Revision 11 Comment acknowledged.
18) Please note the SWPP on site should have all the approved PPPs for Blocks F, G & D.
[Revision 11 Comment acknowledged.
19) Pitch sidewalk slope away from wall in front of lots 83 and 84.
20) Fix 512 contour near lot 21.
21) Place detail of DI's.
22) Move manholes away from roll top curb. See near lot 74 and 63.
23) Provide enough transition between roll top curb and CG -2. See near lot 62.
24) Pitch sidewalk grade away from wall near lot 83 -85.
25) For yard drain details on sheet 32, specify material type. Also, provide 24" and 30" grate
detail.
26) Label YD -15 on sheet 11.
27) Revise 108.1 to a curb inlet.
28) Verify capacity is ok with existing pipes. For example after ex 108, ex 2, after str 243, ex 23
etc.
29) Show a manhole for proposed ex 25.2 on plan to match profile.
30) Verify connection of pipe from yd -13 to existing manhole is possible. There is an existing
pipe from the west.
31) Include YD 26 in table for inlet design.
32) Provide a profile for 23.4 -23.1.
33) Capacity of pipe from 25.2 is exceeded.
34) Show str 23.2 -ex23 capacity calcs on VSMP plan. It appears to be shown on site plan only.
35) Please note a road plan and road bond is required prior to the approval of the final plat.
36) Verify adequate radius is provided for emergency access. Also, what is the maximum
difference between the pavement cross slope and the approach road grade?
The VSMP permit application and all plans may be resubmitted for approval when all comments have
Engineering Review Comments
Page 4 of 4
been satisfactorily addressed. For re- submittals please provide 2 copies of the complete permit package
with a completed application form.
Engineering plan review staff are available from 2 -4 PM on Thursdays, should you require a meeting to
discuss this review.
Process;
After approval, plans will need to be bonded. The bonding process is begun by submitting a bond estimate
request form and fee to the Department of Community Development. One of the plan reviewers will
prepare estimates and check parcel and easement information based on the approved plans. The County's
Management Analyst will prepare bond agreement forms, which will need to be completed by the owner
and submitted along with cash, certificates or sureties for the amounts specified. The agreements will need
to be approved and signed by the County Attorney and County Engineer. This may take 2 -4 weeks to
obtain all the correct signatures and forms.
Stormwater Management Facilities Maintenance agreements will also need to be completed and recorded.
The County's Management Analyst or other staff will prepare the forms and check for ownership and
signature information. The completed forms will need to be submitted along with court recording fees.
After bonding and agreements are complete, county staff will need to enter project information in a DEQ
database for state application processing. DEQ will review the application information based on local
VSMP authority approval. At this time, the DEQ portion of the application fees will need to be paid
directly to the state. For fastest processing, this is done electronically with the emails provided on the
application. DEQ should notify applicants with instructions on how to pay fees. When DEQ approves the
application, they will issue a permit coverage letter. This should be copied to the county.
After DEQ coverage is issued, via the coverage letter, the County can hold a pre - construction conference.
Applicants will need to complete the request for a pre - construction conference form, and pay the remainder
of the application fee. The form identifies the contractor and responsible land disturber, and the fee
remaining to be paid. This will be checked by county staff, and upon approval, a pre - construction
conference will be scheduled with the County inspector. At the pre - construction conference, should
everything proceed satisfactorily, a joint VSMP and grading permit will be issued by the County so that
work may begin.
County forms can be found on the county website forms center under engineering;
http://www.albemarle.org/deptforins.asp?department=cdengmTo
Sincerely,
Michelle Roberge