HomeMy WebLinkAboutSDP201800085 Review Comments Final Site Plan and Comps. 2019-01-10COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
Project: The Vistas at South Pantops — Final Site Plan
Plan preparer: Riki Van-Niekerk, Roudabush Gale & Associates, 172 South Pantops Drive
Charlottesville, VA 22911 [rvan-niekerk(&roudabush.com; rikinaxoudabush.coml
Applicant: Trey Steigman, VP/Management Services Corp [tsteigman(a)msc-rents.com]
102 South First St. Ste. 301, Charlottesville, VA 22902
Owner: Charles W. Hurt, South Pantops II Land Trust, P. 0. Box 8147
Charlottesville, VA 22906
Plan received date: 26 Nov 2018
Date of comments: 10 Jan 2019
Reviewer: John Anderson
(Planning Reviewer: Mariah Gleason
Project Coordinator: Tim Padalino)
SDP2018-00085
Title sheet
1. Revise site plan title to reference SDP201800085.
2. On title sheet, include Note reference to The Vistas at South Pantops Critical Slopes Exhibit, rev. d.
5/11/18, PE -seal date 5/17/18, Approved by Engineering Division 5/17/18, filed with SDP201800008.
3. Revise index to include retaining wall design for all walls associated with travel ways and parking areas.
Retaining wall design for walls integral to buildings 1, 2, or 3 may be submitted with building permit
application/s.
4. Provide retaining wall design for retaining walls associated with travel ways or parking areas that are not
integral to buildings 1, 2, or 3. (Re£ site plan and retaining wall plan review checklists; Attached).
5. Provide /show outline location/s of conceptual SWM detention or treatment systems. VSMP/WPO plan
must be approved prior to Final Site Plan approval. (WP0201800095 is under review.)
6. Revise Erosion Control, ES-1 Note to ref. 9VAC25-840-40.
7. Plan Note 3: Revise to eliminate contractor responsibility to obtain state -federal permits. Albemarle will
not approve a VSMP/WPO plan unless /until required state /federal permits are acquired. FSP cannot be
approved without an approved VSMP/WPO plan. Permit acquisition is an Applicant /Owner responsibility.
8. Plan Note 3: Revise to clarify Property Owner is required to post SWM-ESC-Mitigation plan bonds.
9. Plan Note 4: Revise to read County Engineer, rather than District Engineer.
Sheet 2:
10. Delete ref. to ISP 10 for preserved slope details. Provide label reference to Critical Slopes Exhibit approved
by CDD/Engineering on 5/17/18, filed with SDP201800008.
11. Recommend show `special lot' boundaries. Provide note reference to SUB201800176.
Sheet 3:
12. Provide label reference to proposed private nature trail detail. Provide trail detail. Ref. ASCDSM.
13. Label all pedestrian crosswalks.
14. Provide /label crosswalk striping.
Engineering Review Comments
Page 2 of 4
15. Label all CG12. Provide CG-12 ramps at travelway/sidewalk crossing locations in plan view.
16. Label sidewalk width for sidewalk fronting parking spaces located on south side of Vistas Way.
17. Some proposed parking space /travel way linework is gray; revise to black to indicate proposed
improvements. Applies to sheets 4, 5 gray line type, as well.
18. Label retaining wall/s.
19. Provide /label retaining wall handrails, wherever wall ht. > 4-ft.
20. Label guardrail. Provide label reference to GR-2 detail, sheet 19.
21. Label sidewalk width facing South Pantops Drive.
22. Label South Pantops Rd. right-of-way (linework).
23. Provide outline location/s of on -site SWM facilities (conceptual level), consistent with WPO201800095.
24. Approx. location 100' water protection ordinance buffer leader line may be inaccurate.
25. WPO buffer location may require revision; confirm location buffer. Revise leader line, if necessary.
Sheet 4:
26. Last parking space, NW corner of Vistas Way parking lot measures 13.2 (`sheltered' length =16'). Revise
island west of this parking space to provide `sheltered' length =18-ft. Sheet 20 indicates fire truck will
contact fender of vehicle parked in this space at a location 17-ft. distant from face of curb fronting this
space. Revise to provide 1-ft. clearance between fire vehicle turn figures; that is, 19-ft. from face of curb
fronting this parking space.
27. Revise label at dumpster pad, so legible (revise grayscale text to black).
28. Show and label existing terrain contours.
29. Label entrance width at narrowest point. Applies to sheet 5, as well.
Sheet 5:
30. Provide auto -turn figures for typical passenger vehicle encountering a second typ. passenger vehicle
traveling in the opposite direction at:
a. Travel way curve just prior to entering/leaving building 3 parking deck.
b. At curve measuring 17-ft., FC-FC, on approach to 23-space parking area west of building 2.
31. Ensure aisle width in 23-space parking area west of building 2 is at least 20-ft.
32. Label parking aisle width (item 31).
33. Revise design as needed to provide travelway width for typical passenger vehicles to pass one another at all
locations, when traveling in opposite directions.
34. Provide mirror to aid residents exiting building 3 to minimize chance of collision with vehicle/s reversing
from parking spaces in the 16-space parking area. Sight distance is inadequate.
35. In the following locations, recommend stripe 2 spaces as `No Parking' to allow parked vehicles to reverse,
and travel in a forward direction:
a. N corner building 1, beyond stair well;
b. SE corner building 2, beyond stairwell;
c. NW corner building 3, before stairwell;
Note: Recommendation results in loss of 6 parking spaces.
Note: If recommendation not accepted, provide alternate design to ensure all vehicles using building
parking decks can reverse and travel in a forward direction without performing extreme, multi -point or
precise reverse maneuvers.
Sheet 6
36. Label rectangular structure south of Str. 11. Rectangle differs in shape and style from typical DI.
37. Show and label existing terrain contours.
38. Ensure adequate drainage easement width, all section of proposed storm system. For example, 20' is
insufficient for storm line depth between structures 3 and 4. Ref. easement width diagram, ACDSM, p. 15.
Engineering Review Comments
Page 3 of 4
39. Ensure `for residential development, the principal access [Vistas Way is] free of flooding during the 25-yr
storm.' Ref. item 4, Drainage, Drainage Plan review checklist. Provide LD-229 based on 25-yr event.
Note: development anticipates 949 trips per day (144 units). Vistas Way is a principal access.
40. Show /label VDOT ES, as Str. 1.
41. Label slope of storm line between Str. 9 and 10. Ensure slope < 16%. Ref. Drainage plan review checklist.
Sheet 7
42. Provide additional detail /labels for pool deck area of plan (TW/BW, if retaining wall; spot elevations).
Geometry of structures in this location is unclear.
43. Provide/label handrails wherever wall ht. > 4-ft., including pool deck area.
44. At tangent section of travel way just prior to entering building 3 parking deck, revise % grade labels so
legible.
45. Add flow lines and % grade to asphalt surface to ensure runoff reaches Str. 5.
46. Revise proposed improvements line type from grayscale to black. Also, similar comments elsewhere.
47. Provide TW/BW elevations along retaining wall south of building 2.
48. Show and label existing terrain contours.
49. Ensure entrance grade < 4% for at least 40', measured from EP, South Pantops Drive. Ref. site plan review
checklist, entrance improvements, item 2.
50. Sheet 8: Two (2) serviceberry trees conflict with Str. 7 and 8; revise landscape plan to eliminate conflict.
51. Sheet 12: Provide pavement design for Vistas Way based on 949 VPD. Proposed pavement section Dp
=8.14, but Dr=14.575. Revise Vistas Way pavement section to ensure that Dp(rovided) ? D r(equired)•
Sheet 14
52. Recommend against 0.50% grade, EXSDMH to Str. 10. If As -built condition of this storm line pipe <
0.50%, owner must provide remedy.
53. Max. grade storm line pipe is 16%. Revise proposed grade of storm line pipe between Str. 9 and 10.
54. Provide label identifying structure located 2.7' below storm line between Str. 8 and 9.
55. Provide note requiring specific compaction for MH Str. placed in fill; that is, Str. 513, 613, and 6C, to
minimize issues related to settling. For example:
CONTRACTOR SHALL PLACE FILL UNDER INLET(S) AT 95%
COMPACTION & EMBANKMENT MATERIAL SHALL
CONSIST PREDOMINANTLY OF SOIL AND BE PLACED IN
SUCCESSIVE UNIFORM LAYERS NOT MORE THAN 8" IN
THICKNESS BEFORE COMPACTION IN ACCORDANCE
WITH VDOT 2007 ROAD AND BRIDGE SPECIFICATION
303.04. AFTER 3' VERTICAL PLACEMENT OF FILL,
CONTRACTOR SHALL EXCAVATE RECENTLY LAID FILL
AND INSTALL COMPACTED VDOT STD. 21A STONE IN AN
8'x8' O.C. COMPACTED 21A AREA CENTERED ON THE
INLET(S). CONTRACTOR SHALL REPEAT THIS OPERATION
UNTIL AN 8'x8' O.C. 21A STONE BASE IN INSTALLED
BETWEEN THE EXISTING GROUND AND THE PROPOSED
INLET(S) BASE IN EFFORTS TO REDUCE THE RISK OF
SETTLING. CONTRACTOR SHALL PROVIDE VDOT WITH
COMPACTION RESULTS PRIOR TO ROAD ACCEPTANCE.
56. Show /label VDOT ES-1 in profile (Str. 1).
57. Inlet calculation tables are not VDOT LD-204, LD-229 format. Provide LD-204 for inlets; LD-229 for
storm sewer design.
58. Since vertical drop in `step-down' MH Str. 5 > 4', provide ''V2" steel plate in floor of MH; ref. VDOT
drainage manual, p. 9-38 (image, below):
Engineering Review Comments
Page 4 of 4
VDOT Drainage Manua! Chapter 9 — Storm Drains
9-37 of 70
9.4 — Design Concepts
Where "step down" manholes are used, the Drainage Designer should provide any
needed protection to prevent deterioration of the bottom of the manhole. This protection
can be provided by the addition of a 1/2 inch steel plate in the bottom of the manhole.
This protection should be considered for use if the vertical difference between the
inverts of the inlet pipe and outlet pipe is 4' or greater, and any one of the following
factors are present or anticipated:
• The flow is expected to carry any abrasive material
• Continuous live flow or live flow lasting several days may be expected
• The size of the main pipes is 48" or greater in diameter (for circular pipe) or the
hydraulic opening is 12 ft2 or greater (for shapes other than circular
59. Max. water depth for 5.5" inlet throat ht. = 0.458'. Ensure water depth < Max. depth.
60. Sheet 18: Provide MH Step detail.
61. Sheet 19: Provide dumpster pad detail; ref site plan review checklist, p. 3, item 8.
62. Sheet 19: Provide handrail detail.
63. Sheet 20: Engineering defers to ACFR on adequate geometric design for fire -rescue needs.
Please call if any questions: 434.296-5832 —0069
Thank you
SDP201800085 the Vistas at South Pantops_FSP_011019.doc