HomeMy WebLinkAboutSUB201900156 Review Comments Road Plan and Comps. 2019-11-30COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
Road Plan review
Project: Phase 2 Rivanna Village —Road Plans Associated with SDP2018-31, Block
F,G,H,I,&J
Plan preparer: Alan Franklin PE, LLC /427 Cranberry Lane, Crozet, VA 22932
[alan&alanfranklinpe.com ]
Owner or rep.: Rivanna Investment Holdings LLC, 150 West Main St. Suite 1100
Norfolk, VA 23510
Plan received date: 7 Oct 2019
Date of comments: 30 Nov 2019
Reviewer: John Anderson
SUB201900156 -Road Plan
Include SUB2019-00156 in Road Plan title.
Sheet 18 /others: Shitft parallel parking which occurs on inside of curves to outside curve curb edge.
Sight line is obstructed by inside curve parking; this parking configuration is inherently hazardous
(One example: drivers, pedestrians and children exiting vehicles or even opening doors into obstructed
sight -line path of cars approaching at or above posted speed limit). Provide stopping distance sight
lines that meet VDOT standards, if design proposes inside curb parking. Alternatively, revise parallel
parking design at each occurrence of inside curve parking. See sheets 14, 18, etc. Ref. sheet 15 for
acceptable outside curve curb -side parallel parking.
VDOT must review and approve detailed geotechnical report and CBC Engineers /Contech
calculations and shop drawings for drainage structures on proposed public roads. VDOT must
approve detailed headwall /retaining wall designs associated with drainage structures. Building
inspections must approve detailed retaining wall designs for walls requiring building permits.
Roads must be built or bonded prior to final site plan approval, and prior to final subdivision (plat)
approval.
For horizontal curves, provide all horizonal curve data, not just arc length and radius. Ref. VDOT
Road Design Manual, Ch. 2D, image below [ link:
http://www.virginiadot.org/business/resources/LocDcs/RDM/chap2d.pdf ]
DEPICTING HORIZONTAL ALIGNMENT ON PLANS
P.I.'s, P.C.'s, P.T.'s, etc., curve data, bearings, delta's, direction of angle and tie stations
are to be shown where applicable as outlined in Section 2C-5 (Curve Data).
Provide calculation of all ADTs, which in several instances appear on the low side, given proposed
number of units. Provide for all streets (provide ITE Manual ref. values). Additional comments
possible.
Name (A, B, C... ) and label retaining walls in plan view; sheets 11, 13, 14, etc. Provide detailed, PE -
sealed geotechnical retaining wall designs. All wall ht. > 3-ft. require a building permit. All wall ht. >
4-ft. require PE -sealed structural plans. All retaining walls integrated with drainage structures, that
Engineering Review Comments
Page 2 of 2
serve as headwalls, wingwalls, etc., require VDOT review and approval (Also, item 3, above). Submit
sealed retaining wall plans for Engineering, VDOT, and CDD Building Inspections review as soon as
possible.
8. Sheet 14, Lot I-36: Show drive entrance. Remove parking space/s blocking driveway entrance.
9. Sheet 14, Lots J-34,-35, -36, etc.: Provide auto -turn for vehicle exiting lots. Confirm it is possible to
exit and turn right without crossing street centerline. If not, reduce /revise proposed on -street parallel
parking. See, for example, proposed reduced and limited on -street parallel parking on Butterfield
Lane, between Lazy Branch Lane and Meander Way, sheet 14.
10. Note: In print plan set/s, there are two sheet 14s. Remove duplicate.
11. Sheet 19: Remove cul-de-sac parking which limits fire -rescue apparatus Min. required turning radius.
12. Sheet 24: Revise vertical curve, Cattail Court (PVI Sta. 16+50). Min. k-value Sag=15.
13. Sheet 24: Label % grade, Cattail Court (Sta. 15+40—16+20; assume: - 4%).
14. Sheet 28: — 180' LF U.S. Rt. 250 will be curbed, where once storm runoff exited via shoulder section.
Provide inlet, or storm comps showing inlet is not required for now-channelized flow on US Rt. 250.
15. Sheet 28: Provide inlet or comps showing inlet not required at W end of Terrapin Trace. Storm runoff
will be channel flow when it reaches the end of this street. Provide conventional storm capture
/conveyance (inlet /pipe). Revise plan /profile views and table/s to include new inlets /pipes.
16. Sheet 29: Provide inlet on west side of Mossy Rock Road closer to its intersection with Terrapin
Trace, especially given grade at intersection, which diverts runoff to the W side of Mossy Rock Road.
17. Sheet 29: Provide 10' asphalt trail with 2' shoulders typical detail.
18. Sheet 34: Provide curb elevations near N corner of Steamer Drive /Lazy Branch Lane intersection to
ensure positive drainage to inlet on Lazy Branch Lane.
19. Sheet 34: Provide curb elevations near W corner of Village Park Ave. /Lazy Branch Lane intersection
to ensure positive drainage to inlet on Village Park Ave.
20. Sheet 37: Provide inlet near PL, Lots J-23 - J-24 (best) to catch Qio runoff from 96' DIA cul-de-sac,
else drive entrances will flood. Alternatively, provide inlet at curb fronting Lot J-25.
21. Sheet 38:
a. Update storm sewer pipe computations /tables, consistent with revised or new inlets.
b. Label inlet MHs that require safety slab on profile sheets 64-68; footnote on this sheet may be
overlooked.
c. Ensure tables reflect all inlets /storm pipes, proposed or existing (Rivanna Village Phase 2).
Comment is courtesy request for double-check (nothing appears amiss).
22. Sheet 63: Revise 2SI5 L (inlet throat length). This is a carryover inlet for inlet 2SI5, yet L/Lt =0.43.
Increase 2515 throat length to provide a more conservative design (L/Lt closer to 1.0).
23. Sheet 63: Recommend increase throat length of storm inlet structure 2X5-1 (L/Lt=0.61).
24. Sheets 64-68 (Storm profiles): Update with safety slab labels for manhole ht. >12'.
Please feel free to call if any questions: 434.296-5832 —0069
Thank you
SUB201900156_Rivanna Village Phase 2—block F-G-H-I-J_Road Plan 113019