The URL can be used to link to this page

Home My WebLink AboutWPO201800073 Correspondence 2019-07-05 CIVIL ENGINEERING | ENVIRONMENTAL | SURVEYING | GIS | LANDSCAPE ARCHITECTURE | CONSTRUCTION SERVICES 608 Preston Avenue Suite 200 Charlottesville, VA 22903 P 434.295.5624 F 434.295.8317 www.timmons.com July 2, 2019 County of Albemarle John Anderson, PE Engineering Division 401 McIntire Rd Charlottesville, VA 22903 RE: Lewis & Clark Drive Extension – VSMP Plan Review – WPO201800073 – Rev.2 - Comment Response Letter Dear Mr. Anderson: We have reviewed all of your comments from April 15, 2019 (Rev.2) and made the necessary revisions. Please find our responses to the comments below in bold lettering. SWPPP: a. Sign Sec. 1, VPDES Certification (Print, sign, title, date) VPDES certification will be completed by the contractor once selected. (Rev.1) Not addressed. Registration Statement is now completely blank. Provide all required registration information. (Rev.2) Not addressed. Certification will be signed by contractor once selected b. Lat./Lon. Provided appear to be a location in Louisa County. Please revise Lat./Lon. The Latitude and Longitude have been checked and appear to be in the correct location. Will verify again prior to next SWPPP Submission. (Rev.1) Not addressed. See a, above. Provide and ensure Lat./Lon. Coordinates match project location. (Rev.2) Addressed. c. Sec. 5: Provide SWM Plan. SWM plan will be provided on next SWPPP submission. Road plan cover sheet has been removed. (Rev.1) Not addressed. Provide narrative that at a minimum references pond 1 and approved SDP199800043. (Rev.2) Addressed. d. Sec. 9, Signed Certification: please sign. Certification will be signed by contractor once selected (Rev.1) Not addressed. (Rev.2) Not addressed. Certification will be signed by contractor once selected e. Revise inspection log to provide space for a description of inspection observations – see image, below. Inspection Logs will be changed accordingly on next SWPPP submission. (Rev.1) Not addressed. Possible misunderstanding: please revise to provide adequate space. Expand space for recording description of inspection observation. (Rev.2) Addressed. f. New: p.16 of SWPPP (.PDF) is the Road Plan title sheet; please remove. (Rev.2) Addressed. g. New: Revise SWPPP cover to include reference to WPO201800073. (Rev.2) Not addressed. The SWPPP cover now included a reference to the above WPO number. SWM Plan – Note: Overlap / redundancy likely in SWM Plan comments, below: 1. Show ponds 1 and 2 approved with SDP 1997-00046, on current VSMP / WPO Application. (Also, please see email including initial review comments sent 11/09/2018 12:07pm, and review-related email with photo attachments sent 11/13/2018 1:17pm.) The runoff from this project drains to Pond 1 not Pond 2 which is to the north below sub basin B2. Since no stormwater from the project drains to Pond 2 no label is required. Pond 1 has been labeled on sheet C0.1. (Rev.2) Comment withdrawn. 3. Provide As-built plan / profile drawings (or As-built information on WPO201800073) for ponds 1 and 2. No As-built drawings or information has been located in Engineering or Water Resource Division files. (Rev. 1) Not addressed. May be discussed in comment response letter; comment response letter requested via county email sent 1/7/2019 8:55 AM As-built plans SDP199800043 have been located by county records and scanned into their records per email and link provided by James Smith in his email 12/19/2018. (Rev.2) Addressed. 4. Show ponds 1 and 2 on VSMP /WPO201800073. (Rev. 1) Partially addressed. If pond 2 is shown, please label –also, please see item 1, above (label ponds 1 and 2 on VSMP Plan). Pond 1 is shown and labeled on C0.1. Pond 2 does not need to be shown per response to comment 1 above. (Rev.2) Comment withdrawn. Also, see item 1, above. 13. List special conditions of US ACE permit on the plans. Identify, number, and quantify area impact to wetlands (SF). Identify wetland type/s using text, labels/notes, graphic symbols. (Rev. 1) Partially addressed. Also, see items 15, 19, Sec. C. (ESCP), below. There are no specific “Special Conditions” in the USACE permitting side of things, just general conditions. The general conditions for the USACE SPGP permit are included in the attached “17SPGP01-29JUNE2017SIGNED” document. The DEQ VWP3 permit Special Conditions are shown on plan sheet WIM1.0 (Rev.1) Partially addressed. Also, see items 15, 19, Sec. C. (ESCP), below. (Rev.2) Comment persists. A copy of the USACE permit will be provided once it is obtained. 14. New: Please revise plan title to include reference to VSMP/WPO201800073. The VSMP cover sheet now includes the above reference. (Rev.2) Addressed. B. Pollution Prevention Plan (PPP) The PPP content requirements can be found in County Code section 17-404. 1. See A /Sec. 6 comments, above. Revise Sec. 6 Exhibit, as needed, if plan revised. PPP has been updated as necessary. C. Erosion and Sediment Control Plan (ESCP) Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP. This plan is disapproved for reasons outlined, below. The erosion control plan content requirements can be found in County Code section 17-402. C3.0 10. Revise critical slopes labels. Replace with managed or preserved steep slopes labels. (Rev. 1) Partially addressed. Revise labels to show preserved slopes, consistent with GIS. Image, below. County GIS (green shading indicates preserved (steep) slopes). Labels have been revised to call out managed slopes and preserved slopes. (Rev.2) Addressed. C3.2 15. Relocate roadway if necessary to avoid and minimize wetland impacts. Alternatively, provide copy of USACE Permit authorizing proposed wetland impacts. Applicant response (to SUB201800171 / Road Plan review comment (C3.0), item 8; response d. 12/20/18): ‘Permit will be filed with Army Corps of Engineers. A copy of the permit will be included once approved.’ (Rev.1) Addressed/Acknowledged. 19. Show, estimate, label area of wetland impacts (SF). Identify wetland type: emergent, riverine, palustrine. (Rev. 1) Not addressed. Also, see Sec. A, item 13. Note: Copy of USACE permit will likely address. The above requirements have been added. See plan sheets WIM1.0-WIM3.0. (Rev.2) Addressed. 20. List U.S. Army Corps of Engineers Nationwide permit (USACE NWP-27/other) issued for this project. List date of permit issuance. VSMP/WPO cannot be approved without copy of current USACE permit authorizing specific impacts to specific areas identified, shown and labeled on the VSMP/WPO plan. (Rev.1) Addressed/Acknowledged – see item 15, above. (Rev.2) Comment persists. A copy of the USACE will be provided once obtained. 21. Show wetland protective measures; for example, timber matting and fencing equivalent to tree protection, for wetlands to be preserved and not authorized by USACE permit to be disturbed or impacted, either temporarily or permanently, by project activity. Plans identify no wetlands to be preserved, except by virtue of location outside LOD. Recommend wetland preservation as cornerstone of design. See other comments on topic of impact avoidance and minimization, especially concerning Applicant needs to acquire and provide copy of relevant federal or state wetland, stream, or aquatic resource permits. (Rev.1) Not addressed. Note: Copy of USACE permit will likely address. We currently have tree protection fencing just inside our LOD wherever they border the wetlands. This will serve a physical barrier and marker of the limits disturbance in the field. The permit silt fence inside LOD to which will serve as a physical item in the field between land disturbance and wetlands. A copy of the permit will be provided once available. (Rev.2) Comment persists. Comment will be addressed with approval of the USACE permit. Copy of this permit will be provided once available. C3.3 26. Show wetland protective measures; for example, timber matting and fencing equivalent to tree protection, for wetlands to be preserved and not authorized by USACE permit to be disturbed or impacted, either temporarily or permanently, by project activity. Plans identify no wetlands to be preserved, except by virtue of location outside LOD. Recommend wetland preservation as cornerstone of design. See other comments on topic of impact avoidance and minimization, especially concerning Applicant need to acquire and provide copy of relevant federal or state wetland, stream, or aquatic resource permits. (Rev. 1) Not addressed. Note: Copy of USACE permit will likely address. We currently have tree protection fencing just inside our LOD whenever they boarder the wetlands. This will serve as a physical barrier and marker of the limits disturbance in the field. The permit silt fence inside LOD to which will serve as a physical item in the felid between land disturbance and wetlands. A copy of the permit will be provided once available. (Rev.2) Addressed. 27. Increase pitch of wetlands label downslope of proposed box culvert. Apply item #19, above to sheet C3.3. (Rev. 1) Not addressed. Labels have been revised accordingly. (Rev.2) Addressed. 30. If TSDs convey sediment-laden storm runoff, provide sediment trapping measure at TSD outfalls. (Rev. 1) Not addressed. Provide trapping measure for sediment-laden storm runoff in plan view, or, alternatively, detail and with plan view (label) ref. to detail. Per email from John Anderson 2/8 note has been added to TSD that additional trapping measures will be added at TSD outfalls as necessary at ESC inspector’s discretion. (Rev.2) Addressed. C3.4 Note. Also, county email, 2/8/2019 5:28pm. 31. Provide break in SSF at sediment trap weir outfalls (ST2, ST3). Provide break in SSF for ST1 (C3.2). (Rev. 1) Partially addressed. Provide break in SFF for ST1. Silt Fence break has been provided for all weir outfalls. (Rev.2) Rev.1 not addressed. Note: Silt fence break detail shared via email (2/8/2019 4:56 PM) is not included with rev. VSMP plan. Ensure information shared with county via email 2/8/2019 is included with plans. Silt fence detail has been added to the plans as well as callouts for silt fence breaks at the weir outfalls. C3.4 33. Provide CL roadway stationing since blanket matting labels ref. stations. (Rev. 1) Not addressed. Roadway centerline stationing has been added as requested. (Rev.2) Addressed. Design Calculations & Narrative: 5. Provide outfall protection calculations. Ref. VESCH Std. & Spec. 3.18 plates 3.18-3 and /or 3.18-4. (Rev.1) Partially addressed. As follow-up: please correlate p. 13-15, Design Calculations and Narrative to culverts 1, 2, 3. It is not readily apparent which plates are assigned to culverts 1, 2 3. Plates have been updated to show which culvert they are assigned to. (Rev.2) Addressed. 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