HomeMy WebLinkAboutSUB201900049 Correspondence 2019-06-13 (2)TIMMONS GROUP
YOUR VISION ACHIEVED THROUGH OURS.
June 12, 2019
John Anderson
County of Albemarle
401 McIntire Rd
Charlottesville, VA 22902
608 Preston Avenue P 434.295.5624
Suite 200 F 434.295.8317
Charlottesville, VA 22903 www.timmons.com
RE: UVA Research Park Loop Road — Road Plan Review — SUB201900049- Comment Response
Letter
Dear Mr. Anderson:
We have reviewed all of your comments from May 3, 2019 and made the necessary revisions.
Please find our responses to the comments below in bold lettering.
SU B201900049:
1. Rev. C0.0 Note reading: There are no critical slopes located within the project to read,
'No steep slopes are affected by this project,' if that is the case. Preserved and managed
steep slopes exist on this parcel, which is in the development area, and should be shown
on C0.1.
The above note on the cover page has been revised accordingly.
2. Show managed steep slopes, C2.0. Ref. county GIS.
Managed slopes are now shown on sheet C2.0.
3. Recommend ref. WP0201900021, UVA Research Park Loop Road VSMP Plan, on C0.0.
WPO reference has been added to the cover sheet for the VSMP plan.
4. Include public road acceptance procedure on C1.0.
Road acceptance procedure has been added to sheet C1.0.
5. Include VDOT IS-1 (Inlet shaping) detail on C1.1.
Detail IS-1 has been added to sheet C1.1.
6. Include VDOT PB-1 (Pipe bedding) detail on C1.1.
Detail PB-1 has been added to sheet C1.1.
CIVIL ENGINEERING I ENVIRONMENTAL I SURVEYING I GIS I LANDSCAPE ARCHITECTURE I CONSTRUCTION SERVICES
7. Provide pavement design per VDOT 2018 Pavement Design Guide for Subdivision and
Secondary Roads in Virginia.
A Heavy Duty asphalt section has been shown on sheet C1.1
8. Provide pavement section with base stone, base asphalt and asphalt surface depth
(dimension) labeled.
A pavement section with base stone, base, asphalt, and asphalt surface is shown on
sheet C1.1
9. Provide, show, and label VDOT standard barricades at turnout locations on west side of
loop road (points of future connection/Encompass). A barricade is not required at 90-
deg right angle in road, but at Encompass southern/northern entrances where proposed
grades slope away. If these turnouts will not receive roadway extension within 12
months, provide GR-2 to limit damage or injury that may reasonably attend a loss of
control incident at either location. Please provide barricade and GR-2 typ. Details.
Barricades and guardrails have been added and called out on the layout plan. C4.0.
10. Ensure SWM-related details (trash rack for SWM drainage structures and Contech R
Jellyfish Filter), C1.2, appear with WPO201900021 VSMP/WPO plans, as well.
The plans have been revised and now include Stormtech chambers and stormwater
treatment. These details have been added to the plans.
C2.0:
11. Recommend provide label ref. to SUB201800171, Lewis and Clark Drive Road Ext. RP,
similar to label ref. to UVA Research Park Sewer Extension project.
A label has been added calling out the construction of the Lewis and Clark Road
Extension project and Sewer project.
12. Recommend increase text pitch of relevant labels too small to read with ease.
Text size has been increased as necessary.
C4.0:
13. Align CG-12 ramps at Int. Loop Drive and Innovation Drive. Eliminate skew. Ramps and
crosswalk should be in line with one another at this location.
In response to comment # 13 of the Road Plan review regarding the CG-12 ramps at
the intersection of Loop Road and Innovation drive being at a skew, we believe that
the current design is in compliances with ADA "Advisory 405.7 Landings" and ADA
"Advisory 406.6 Diagonal Curb Ramps". Landings should be perpendicular to the path
of travel to allow for more acceptable cross slopes for ADA access. The ramp must
come down perpendicular to the gutter pan/ flow line so that the pedestrian does not
need to traverse the slope of the gutter at an angle. Providing a landing before the
gutter pan would require the ADA ramps to extend back to the north and South as
much as 10' which would make it difficult to tie the current and future sidewalk from
the west into the top of the ramp.
14. Provide street name sign, even if unnamed, or name pending.
A street name sign has been provided at the intersection of Loop Road and Innovation
Drive.
15. Provide complete horizontal curve data in plan view; i.e. PC -PT, radius of CL curvature.
Horizontal curve data is now shown in plan view.
16. Provide speed limit signs.
Speed limit signs have been added to the plans.
17. Please clarify 'Future private R/W (Typ.)' label. Is Loop Road a proposed private street?
If so, private streets may not intersect a public road at more than one location. If this is
a loop road, it will likely intersect Lewis and Clark Drive (public road) at more than one
location and must itself be a public road.
Per email coordination with John Anderson on 5/29/2019, this comment has been
withdrawn.
18. If Loop Road is a proposed private street, please ref. Ch. 14 for private street request
procedure.
Per email to Tim Padalino May 315t road appears to be in compliance with county
code. Please provide more information on what is required for this project.
19. C4.0/C4.1: Recommend 'Ped-crossing Ahead' signs for Loop Road in advance of
crosswalks.
Pedestrian crossing signs have been added to the plans.
20. Recommend caution sign on Loop Road prior to Innovation / Lewis and Clark that
notifies 'Emergency Fire / Rescue Entrance Ahead.'
Sign seems unnecessary. Stop sign at the intersection of Loop Road and Innovation
Drive will already cause drivers to stop and check both direction before pulling into
traffic.
C5.0:
21. Show proposed SWM Facility / Access / Drainage Easements.
Easements have been added.
22. Provide curb break / mountable curb to provide SWM Facility Access (ACDSM, pg.12).
Provide access label or note on plan and linework with proposed grading that meets
ACDSM standard, text image, below, for dry pond Access:
Best Management Practices for Stormwater Management: All practices must have
adequate vehicle access; 10' width graded at less than 20%. Anything over 20% must be
surfaced with gravel or pavement. Access must be to all structures and forebay cleanout
areas. Easements must be provided over all access and facilities, to accompany deeds
and agreements as available on the county website.
20' wide segment of CG-7 mountable curb, 10' wide vehicle access road with 20%
maximum slope, and easement lines have been added.
23. Provide typ. Detail, transition from CG-6 to mountable (rolltop) curb at point of SWM
facility access.
Detail has been added to the detail sheet.
C4.1:
24. The same line is labeled 67' wide R/W and Future Private R/W. Please see item 17.
Clarify.
The call -outs have been revised accordingly for the private road.
25. Provide 'No Parking' signs at regular intervals, since no on -street parking.
No parking signs have been added to the plans along Loop Road.
26. 10' wide utility corridor may be sufficient to install utilities if water / sewer are located
within roadway prism, as proposed, but wider utility corridor/s may be required if VDOT
policy requires san./water utility lines to relocate outside the roadway prism. Note, for
example, ACSA minimum horizontal separation for water and sanitary sewer facilities.
The road is to be private and not a VDOT road.
27. Provide plan note outlining sequence of removal for Ex. Septic field, and that references
any VDH permit number, or permit requirements that may guide construction in vicinity
of area marked 'Approximate Location of Ex. Septic Field per plans...'
The existing septic field will be removed as a part of the UVA Research Park Sewer
Extension project.
28. C4.2 shows proposed 8" PVC (SSWR) passing beneath multiple storm pipes. Please
consider recent VDOT Culpeper bridge and drainage guidance concerning utilities placed
over or under structures to be maintained by VDOT, and coordinate with VDOT to revise
design as needed.
The proposed Road is private. Per conversation with Richard Nelson, we will be
allowed to run the proposed 8" SSWR under the storm pipes.
29. C4.3 shows proposed 8" water line passing beneath multiple storm pipes. Please
consider recent VDOT Culpeper District guidance concerning utilities placed over or
under structures to be maintained by VDOT, and coordinate with VDOT to revise design
as needed.
The proposed road will be private. Per conversation with Richard Nelson, we will be
allowed to run the water lines under the storm pipes.
C5.0:
30. Ensure dry pond design details on RP match design details on WPO201900021, or
preferable limit design detail provided for dry pond on the Road Plan to conceptual
outline, with ref. to WPO201900021.
Acknowledged. Plan set is design as one package for construction and select sheets
are added or removed to make up road plan and VSMP plan.
31. Label or delete blue circle lines
The blue circle lines have been labeled.
32. Provide spot elevations and labels that ensure positive drainage in vicinity of right angle
turn in road, to ensure westbound/entrance storm runoff on Loop Road reaches Str.
104.
An inlet has been added at this point to ensure positive drainage in this vicinity.
33. Revise inlet location or lengths since spread (T) > 8-ft at Str. 122, 212.
Inlets have been revised to ensure spread does not exceed 8ft.
34. C5.3: Provide cross drains per road plan checklist for reviewers, pg. 4 ('locations shown
and labeled with VDOT designations (CD-1,2) at every major cut and fill transition or sag
curve'). Design appears to require eight (8) cross -drains (2 sag curves, 6 cut/fill
transitions).
Cross drains have been added. See plan sheet C5.0.
35. C6.0, C6.1: Remove from Road Plan. Include with VSMP/WPO Plan. Review comments
for these plan sheets will be included with WPO plan review comments.
These sheets have been removed from the road plan for this re -submission.
C7.0:
36. Provide 95% compaction note for area of fill at Str. 112, profile Str 112 — Str 100.
The above note has been added to the plan sheet.
37. Provide profile, Str 114 — 112.
A profile for this section is shown on sheet C7.0
38. VSMP Plan and Road Plan Design Calculations & Narrative, 03/25/2019:
a. SWM Quantity Narrative — Include information highlighting (via prior -approved
table, graphic, narrative, zoning, site, or WPO data) how eastern side of project
drains to a large wet pond that was designed to handle stormwater quantity for
the full build out of the research park. Recommend information identical to
Timmons Group Lewis and Clark Drive Road Extension VSMP Plan and Road Plan
Design Calculations & Narrative booklet, d. 03/25/2019, pg. 18-19.
A stormwater exhibit has been provided showing the above requested
information in the calculations book.
b. LD-204
i. Revise at Str. 122, 212.
Structures have been revised accordingly.
ii. Check eight of curb opening (typ. 5.5" or 0.46')
Curb openings have been revised.
iii. Check d/h. Anticipate values <1.0.
Storm calcs have been revised.
c. SWM routing comments will be included with WPO201900021 plan review
comments.
Acknowledged.
We have included PDF copies of the plans and calculations for your review. If you have any
questions or comments, please feel free to give me a call at 434.295.5624.
Sincerely,
Jonathan Showalter, PE
Project Engineer