HomeMy WebLinkAboutSUB201700199 Review Comments Road Plan and Comps. 2018-08-08COMMONWEALTH of VIRGINIA
DEPARTMENT OF TRANSPORTATION
1601 Orange Road
Culpeper, Virginia 22701
Stephen C. Brich, P.E.
Commissioner
July 20, 2018
County of Albemarle
Department of Community Development
401 McIntire Road
Charlottesville, VA 22902
Attn: Matt Wentland, P.E.
Re: Foothill Crossing Connector Road — Road Plan
SUB-2017-00199
Review #3
Dear Mr. Wentland:
The Department of Transportation, Charlottesville Residency Transportation and Land Use
Section, Culpeper District Structure & Bridge and Hydraulics Sections, as well as the Central
Office S&B-Geotechnical Section, has reviewed the above referenced plan as submitted by
Collins Engineering, revised 11 June 2018, and offers the following comments:
Land Use
1. Regardless of the responsible maintenance party, the Culpeper District Structure &
Bridge Section must approve that the culvert/tunnel is designed appropriately for the
public road above. The Structure & Bridge Section has outstanding Geotechnical
comments and is still reviewing the current resubmission. We will advise if any of these
comments have not been adequately addressed once we receive notice from that Section.
2. This plan does not appear to indicate what section of the Connector Road is being
proposed with this plan versus the Glenbrook Plan. The same line type and weight are
used throughout; please clearly differentiate and add a note with the station numbers.
3. Please remove the sight distance lines from the road profiles as this is not accurate
information; sight distance profiles have been provided on Sheet 9A.
S&B — Geotechnical Please see Comment #1
4. Section 5.1 of the F&R report states, "Soil penetration data has been used to estimate an
allowable bearing pressure and associated settlement using established correlations."
However, I did not see where either the allowable bearing pressure or the settlement was
indicated in the report. (Note that "allowable bearing pressure" is an Allowable Stress
Design term. I suspect LRFD terms should be used.)
5. Page 11 of the CES calculations indicate that the Minimum Service Bearing Pressure is
2500 psf. Please confirm that this value is referring to the Minimum (Required) Bearing
Resistance at the Service Limit State. Or does this value represent the Maximum
(Applied) Bearing Pressure at the Service Limit State?
6. The required nominal and factored bearing resistances for the controlling limit state must
be shown on the plans for the Pedestrian Tunnel.
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July 20, 2018
Matt Wentland, P.E.
Page 2
7. In Section 5.2, F&R gives the minimum depths to suitable bearing soils of 3.5 feet for the
Pedestrian Tunnel. It appears that this depth corresponds to elevations of 613.5 at boring
B-3 and 616.5 at boring B-4. The inlet and outlet bottom elevations of this structure are
615.93 and 615.52, respectively. Will, after excavations are made to place the bedding
material, the recommended minimum depths/elevations called out in F&R's report be
reached?
8. Sheet 2 of the Delta plans state that the 17th Edition of AASHTO was used; however, the
Winchester Precast Plans and the CES calculations indicate that AASHTO LRFD was
used. This discrepancy should be clarified.
9. Sheet 2 of the Delta plans indicate that the friction angle of the retained fill was assumed
to be 30 degrees; however, the CES calculations indicate that 32 degrees was assumed.
This discrepancy should be clarified.
10. Sheet 2 of the Delta plans indicate that a sliding coefficient of 0.45 was assumed;
however, the CES calculations indicate that 0.5 was assumed. This discrepancy should
be clarified.
Please provide a copy of the revised plan along with a comment response letter. If further
information is desired, please contact Justin Deel at 434-422-9894.
A VDOT Land Use Permit will be required prior to any work within the right-of-way. The
owner/developer must contact the Charlottesville Residency Transportation and Land Use
Section at (434) 422-9399 for information pertaining to this process.
Sincerely,
I
Adam J. Moore, P.E.
Area Land Use Engineer
Charlottesville Residency
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