HomeMy WebLinkAboutSDP201500026 Review Comments Minor Amendment 2015-06-09YlAGIl`11A
County of Albemarle
Department of Community Development
Project: Avinity 1, Phase IV —Minor Site Plan Amendment
Plan preparer: Scott Collins; Collins Engineering [200 Garrett St., Suite K, Charlottesville, VA
22902, scott(gacollins -en ing eering com]
Owner or rep.: Avon Properties LLC, P.O. Box 1467, Charlottesville, VA 22902
Plan received date: 29 May 2015
Date of comments: 9 Jun 2015
Planning Coordinator: Johnathan Newberry
Reviewer: John Anderson
Engineering has completed review of proposed plans.
Minor Site Plan Amendment (SDP201500026)
1. T -1 — (Proposed changes, Item 3) Modifications to existing travelway may require adjustment to existing
Avinity 1 road/drainage subdivision bond. Contact Engineering to discuss bond requirements attending
proposed change to existing travelway, or attending revision/deletion /addition of drainage items. Minor
Site Plan Amendment #2 changes requiring new or increased bond amounts must complete bond process
prior to Minor Site Plan Amendment Approval.
2. To extent changes affect Approved WPO ESC /SWM plans for Avinity 1, provide letter (if only trivial
change), or revised WPO plan sheets for insertion into Approved WPO to guide review and inspection. All
sheets that reference `Approved impacts to stream (Typ.)' or make reference to WPO Approval must
reference Approved WPO# for Avinity 1, or Amended WPO# for Avinity 1. Add WPO# to labels that
reference WPO Approval Approved impacts to stream, for example —S -1, S -2, S -3, LL -1.
3. Contact engineering to discuss possible change in WPO bond amounts for Avinity 1 (ESC measures /SWM
facilities), unless proposed ESC measures /SWM facilities are covered by existing bonds. Riprap outlet
protection for pipe 1, for example, may be candidate for new or increased WPO bond amount.
4. T -1 —List WPO# with other site data.
5. T -1 — Confirm via narrative that proposed changes (1. -5.) do not increase impervious area, decrease turf
areas, or affect SWM calculations for Approved WPO, Avinity 1, in any respect. Reviewer received verbal
confirmation of this during brief discussion, 9 -Jun, 10:30am (Scott Collins /COB).
6. S -1 — Please revise pavement parameters /design table entries for accuracy: Dp = 16.05; Dr =12.9 (ADT =583,
using Trip Generation Manual values for single family detached (9.57) and Apartment (6.72) to estimate
single family attached (Ave = 8.16). Trip Generation Manual does not list single family attached. Using
townhouse (5.86) to estimate single family attached may be unrealistic. No change in pavement
design/section required. Please revise ADT, Dp, and Dr values to: 583, 16.05, and 12.9, respectively. Feel
free to call to discuss.
7. S -1 —Add Note: "Phase I, II, III, IV are Avinity 1. Avinity 2, future development, is not depicted or shown
on this sheet."
8. S -1 — Include 3' -4' (speed limit dependent) buffer between back of curb and sidewalk, Degraw St. to
Avinity Loop merge lane. —Ref VDOT Road Design Manual, Section B(1)- 4.LPedestrian and Bicycle
Facilities, l .A.(4).
Engineering Review Comments
Page 2 of 2
(4) Sidewalks shall be a minimum of 3 feet behind the back of curb on curb
and gutter sections, however, if posted speed is greater than 25 mph a 4
foot buffer is required to allow for the placement of signs in accordance
with the MUTCD, Part 2 and, if trees are to be planted between the curb
and the sidewalk, the buffer strip shall not be less than 6 feet wide with the
trees planted so that the center of the tree trunk is not less than 3 feet
behind the curb. Sidewalk placed adjacent to the curb shall be 8 feet in
width to accommodate the opening of car doors. See Figure 6 and 10.
9. S -1 — Revise Street Pavement sub - caption to read Street Parking Spaces, rather than Parking Spaces.
10. DP -12 — Provide cross drains at required locations —ref Road Plan review checklist:
cross drain locations shown and labeled with VDOT designations (CD -1,2) at every
major cut and fill transition or sag curve
11. DP -12 —Limit profile view of Degraw St. to only that portion included with Site Plan Amendment #2.
Minor Site Plan Amendment approval will exclude portions of Degraw St. included with Avinity 2 site plan.
12. DP -13 —Add notes for drainage structure steps and safety slab for structure height > 4712', respectively.
Include VDOT typ. details for drainage structure steps, and safety slab.
13. DP -13 — Recommend add structure number labels for all pipes in drainage profiles.
14. DP -14 —Add many more contour labels to interim and final drainage area plans, and proposed inlets
drainage area plan. Increase font pitch in all views so contour labels more easily readable.
DP -14 — Revise slope, structure 19, to 0.50, consistent with plan view (Drainage Descriptions table).
Please contact John Anderson at janderson2kalbcmarlc.orj4, or 434 - 296 -5832 - 0069, if any questions.
File: SDP201500026 Avinity 1- Phase- IV_Minor Amend-060915