HomeMy WebLinkAboutSUB201800171 Correspondence 2019-01-08 (3)TIMMONS GROUP
YOUR VISION ACHIEVED THROUGH OURS.
December 20, 2018
John Anderson
Albemarle County
401 McIntire Rd, Rm 227
Charlottesville, VA 22902
608 Preston Avenue P 434.295.5624
Suite 200 F 434.295.8317
Charlottesville, VA 22903 www.timmons.com
RE: Lewis & Clark Drive Extension — Road Plan Review — SUB-2018-00171— Rev.1 - Comment
Response Letter
We have reviewed all of your comments from November 29, 2018 and made the necessary
revisions. Please find our responses to the comments below in bold lettering.
1. C4.4-C4.5: Provide cross drains with VDOT designations (CD-1,2) at every major cut and
fill transition or sage curve (Ref. Road Plan review checklist, pg. 4, item #6).
Cross drains have been added.
2. C4.3: Provide Street name sign.
The street name sign has been added to the plan sheet.
3. C4.3: Label stop bar.
Stop Bar has been labeled.
4. C4.1: Revise striping legend to include prop. Directional arrow.
The striping legend has been revised as requested.
5. C3.0-C3.5: Remove erosion and sediment control notes, sequence, details, and plan
sheets, since these will be reviewed and approved with WP0201800073.
Acknowledged. Plan sheets have been removed.
6. C2.0: Increase pitch of contour labels, so readable at scale of typical existing features.
The contour labels have been adjusted to make them more readable.
7. C1.0: Include ref. to WP0201800073 with General Construction Notes for Erosion and
Sediment Control, and Albemarle County Stormwater Management Notes.
The WPO plan number has been added to the above sections of notes.
8. Show/include Albemarle County Public Road Acceptance Procedure on Road Plans; link:
The above has been included on sheet C1.0
CIVIL ENGINEERING I ENVIRONMENTAL I SURVEYING I GIs I LANDSCAPE ARCHITECTURE I CONSTRUCTION SERVICES
9. Show/include (MH) step detail, if not included.
The detail is now included. See sheet C1.1.
10. Show/include VDOT safety slab detail, if not included.
The safety slab detial has been added to sheet C1.1.
11. Provide pavement design based on full build -out ADT.
Acknoleged. Pavment design will be provided when avalible.
12. C0.0: Revise index (ESC sheets removed).
The index has been revised accordingly.
13. XS-27 — XS-36: VDOT (11/8/18) review comment #5: "The provided typical sections
appear to have gutter in sections that slope away from the curb and CG-2 in sections
that slope toward the curb. Please explain." Code requires curb and gutter (shall be
constructed with) in the development areas. Revise design for all stations with shoulder
and ditch sections. Ref. VDOT Subdivision Street Design Guide, Appendix B(1), Table 1,
Geometric Design Standards for Residential and Mixed Use Subdivision Streets, which
applies to Lewis and Clark Road Extension.
The road has been designed with superelevation in accordance with TC-5.11, 45 MPH Urban
Low -Speed design standards. This causes some section of the road to slope towards the
center median. Inlets have been provided along the median were required. The current
design allows for the construction of the western two lanes of the future 4 lanes full road
section with a center median. Curb and gutter have been provided in all location where it will
also be necessary for the final 4 lane condition. Curb and gutter have been excluded along
some section of the road which will need to be modified for the future 4 lane widening. In the
future, 4 lane condition curb and gutter or curb will be provided on both side of the final road.
C8.2:
14. Provide detail and specifications for pipe and MH bedding for sections of storm system
entirely or substantially in fill. For example: structures 207, 205, 203 (pipes), and 206,
204 (MHs), 231 (pipe, C8.1), 255, 221 (pipes, C8.3).
A note has been added to the storm profiles.
15. Revise 16.96% slope, Str. 201. See Drainage Plan Review checklist, pg. 2, 3rd item.
The slope has been revised.
16. Provide %" steel plate in the bottom of manholes, wherever applicable. From VDOT
Drainage Manual, p. 9-38, image below.
A note has been added to the storm profile sheets calling out a %" steel plate for all "step
down" manholes.
17. Provide VDOT safety slab label for any structure/s with height greater than 12'; Str. 202,
for example.
Safety Slabs have been added for all structures greater than 12'.
18. Provide safety slab detail (SL-1); provide MH safety step detail.
The above details have been added to plan sheet C1.1
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