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HomeMy WebLinkAboutSUB201300179 Review Comments Road Plan and Comps. 2014-02-12 s Nam, A,OfA COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road,Room 227 Charlottesville,Virginia 22902-4596 Phone(434)296-5832 Fax(434)972-4126 Project: 5th Street Station Plan preparer: Bohler Engineering, [dhines @bohlereng.com] Owner or rep.: New Era Properties [alan.taylor @redlightmanagement.com] Plan received date: 16 Dec 2013 Date of comments: 12 Feb 2014 Reviewer: Glenn Brooks A.Road and drainage plans(SUB201300179) 1. VDOT approval is required. 2. Bent Creek Road bridge plans and VDOT approval of bridge plans is required.The preliminary drawings that do not reflect actual conditions on sheet 15 are not sufficient. 3. Plans for the Arch, footings and endwalls are required. These may also require VDOT approval. 4. Stormwater management for the roadway is required. Portions of the road appear to drain directly to the creek. 5. The site cannot be graded as part of the road plan. The site grading is shown on other plans, and there seems to be some confusion on what plans cover which items and when they will occur. 6. Retaining wall plans must be included. It does not appear possible to build the roadway without the walls. The generic manufacturer's details on sheet 14 are not sufficient. 7. Provide horizontal curvature information. This was not found. A 25 mph speed limit does not appear adequate for this road. A 35mph speed limit seems appropriate as a minimum. 8. Planning approval will be required for the landscape plans. 9. The drainage areas were not provided as indicated on sheets 8A-C. Drainage computations could not be reviewed. Provide drainage computations for the stormsewer, and for the arch culvert crossing. It is not clear why HGL tables are included. All pipes should be designed within open channel flow capacity. 10. The topography is out of date on the Avon side. Please update the topography. 11. The stream buffer line is not legible. Please correct. Regarding the stream buffer;A mitigation plan is required and will need to address; a. The large basin in the stream buffer will need to be moved. See the phase 2 comments. b. There is too much clearing shown for the stormsewer outfalls and pipes, and these will need to be narrowed. c. It is not clear why the streambank is proposed to be graded out at each pipe discharge. This does not appear acceptable. 12. The demolition plans could not be deciphered. They appear unnecessary, as the limits of the disturbance on the erosion and sediment control plans will govern,and they are not in this plan set. 13. Show easements over all drainage outside the right-of-way. 14. Proposed slopes steeper than 3:1 must have low maintenance ground cover specified(not grass). 15. Please provide a copy of your critical slopes waiver for the disturbances shown on the plan. 16.All proposed entrances must have a standard VDOT designation and be 4% or flatter for 40'. Site entrances must be part of an approved site plan. 17. Please provide the traffic study for all the turn lane lengths and all the entrances. It seems odd that there are so many entrance with left turn lanes,but no right turn lanes or tapers. Engineering Review Comments Page 2 of 2 18. Specify the guardrail type and end sections. 19. The signage plan does not appear adequate. More speed limit signs are needed,warning signs for the cross-walks,end-of-state maintenance, street name signs.,park-and-ride signage,etc. 20. Provide pavement design computations. 21. Provide a typical sidewalk detail. 22. A grade transition needs to be provided from Avon Street at the crown tangent of-2%. 23. Specify underdrains and cross-drains on the plans and profiles. 24. The typical sections must specify maximum shoulder and clear zone grades,rather than simply"tie- out". 25. Planting strips must be a minimum of 6' wide. 26. Drainage profiles need to show; a. All utility crossings b.material structural classification for pipe. c. inlet shaping for any drop of 4' or more d. safety slabs in any structure taller than 12' e. flatter grades at discharge. Steep pipes with high velocity discharges should be avoided. Energy dissipation and scour protection are needed. 27. The park and ride area will need to follow the county site plan requirements(Code 18-32, 18-4.12), using curb and gutter. 28. The drainage system from the entrance on Avon cannot simply release above the park and ride lot. B.Stormwater Management and Mitigation Plan Plans addressing the road have not been received. Comments on the phase 2 plans and the site plan have been sent previously and seem to cover some of the items shown on this plan. It is not clear where a demarcation lies. C.Erosion Control Plan(WPO201300074) Michael Koslow,who had these plans in his review queue,has left the county. After his departure, this plan was found to be beyond the 45 time limit for review,and so it is approved on that technicality. It is noted that the limits do not include the road. There will also need to be an approved mitigation plan before a permit can be issued.