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Home My WebLink AboutSDP202100022 Correspondence 2021-05-19SHIMP ENGINEERING, P.C. Design Focused Engineering May 18, 2021 John Anderson County of Albemarle Department of Community Development 401 McIntire Road, North Wing Charlottesville, Virginia 22902 RE: Response Letter #1 for SDP2021-22 Albemarle Business Campus Block 5 - Final Site Plan Dear John, Thank you for your review of the final site plan for Albemarle Business Campus. This letter contains responses to Engineering comments dated April 28, 2021. Our responses are as follows: 1. Not Applicable for Block 5 SDP. 2. Not Applicable for Block 5 SDP. With final site plan: 3. Comment Addressed 4. C5, C6 a. Comment Addressed. 5. C6 a. Comment Addressed. 6. C7 a. Not Applicable for Block 5 SDP. b. Not Applicable for Block 5 SDP. c. Label site entrance radii and relevant entrance geometry. As follow-up: Proffered roundabout at intersection of Old Lynchburg Road and Fifth Street cannot be built with current ABC block 5 design. Revise block 5 entrance on Old Lynchburg (OL) Road to accommodate ZMA201900003 proffered future roundabout geometry. Images may be helpful. Sheet 2, SDP202100022 (per ZMA201900003) potential 150' inscribed diameter single -lane roundabout: Please compare -130' distance needed to construct slip lane to point of transition with OL Road RW, with sheet 6 -100' distance, Fifth St. to OL Road entrance. In other words, constructing the roundabout requires OL Road block 5 site entrance to be positioned farther north than shown RESPONSE: You make a fair observation about the dimensions as compared to the roundabout exhibit, so we looked into this further and now have a few things to note: first, after further analysis of the roundabout exhibit, we realize that the exhibit roundabout location is not optimized and is not centered in the existing 5' St ROW. Second, we discussed this with Adam Moore of VDOT, who agreed that the design roundabout location with likely be further south (page down) than exhibit shown. Finally, Adam agreed that the roundabout slip lane construction will need to have final design coordination with the new ABC entrance location, but has agreed to the entrance location as we have currently drawn. The idea is that the roundabout slip lane design will lead into 912 E. High Sr. Charlottesville, VA 22902 1434.227.5140 1 shimp-engineering.com a right -turn lane into ABC (where we currently have the right turn taper), ensuring a smooth transition into the site. On that note, we have revised the entrance layout per requests by VDOT to ensure this future transition. We realize thm this analysis that there will likely be more ROW dedication in block 2 than was estimated. We also realized that there is now no ROW dedication required for Block 5. Thank you for bringing this to our attention; for now we have completed entrance revisions to confirm that the location can work, so in the future we will simply need to coordinate final designs to ensure everything meets VDOT standards. 7. C7, C8 a. Label (typ.) parking space length. As follow up: Angled and parallel parking space length are included, but unless overlooked, perpendicular parking space length (18') is not included; please provide perpendicular parking space labels (L x W). RESPONSE: You are correct, and parking space length (18') is now included for these areas of parking. b. Comment addressed. c. Comment addressed. d. Label CG-12. As follow-up: Please label CG-12s at dynamic transport plaza. RESPONSE: CG-12 labels now added to dynamic transport plaza. e. Comment addressed. f. Comment addressed. g. Please ensure that all parking spaces immediately adjacent to sidewalks are either: i. 18' L fronting 6' sidewalks, or As follow-up: Please see item Ta., above RESPONSE: Comment Noted, addressed with 7.a. response. ii. Comment addressed. 8. C8 a. Label block 2-5 development entrance radii /relevant entrance geometry at Old Lynchburg Road. As follow-up: Please see item 6.c., above. RESPONSE: addressed with 6.c. response, above. b. Comment addressed. c. Comment addressed. d. Comment addressed. e. Comment addressed. f. Since site access from 5th Street spans property line with parcel to east, provide legal instrument that allows site access. Existing legal instrument (201800013730) presents obsolete image. Provide instrument specific to current geometric design of Wahoo Way (attached image removed in comment response). (FSP) Persists. Applicant: `A new access easement will be recorded prior to final site plan approval.' RESPONSE: new Walton Way permanent access easement linework and legal instrument, resulting from recently recorded BLA, is shown in this site plan. g. Not Applicable for Block 5 SDP. h. Not Applicable for Block 5 SDP. 9. C9: Comment addressed. [EWGRI] a. Comment addressed. b. Not Applicable for Block 5 SDP. c. Comment addressed. d. Not Applicable for Block 5 SDP. 912 E. High St.. Charlottesville, VA 22902 1434.227.51401 shlmp-engineenrig.rom 11. C10,Cl1 a. Show /label proposed utility easements. i. Comment addressed. ii. Comment addressed. RESPONSE: Noted about the public drainage easements. Easement plat is currently being prepared by Roger Ray & Associates. iii. Public SWM facility and public drainage easements require plat with deed, and recordation prior to FSP approval. RESPONSE: Easement plat is currently being prepared by Roger Ray & Associates. iv. Not Applicable for Block 5 SDP. v. Not Applicable for Block 5 SDP. b. Comment addressed. c. Comment addressed. 12. C11 a. Comment addressed. b. Comment addressed. c. Comment addressed. d. Comment addressed. e. Comment addressed. f. Provide additional proposed grade labels, for example: i. Not Applicable for Block 5 SDP, ii. Not Applicable for Block 5 SDP, iii. Comment addressed. g. Retaining walls >3' In. require a building permit. Retaining walls >4' ht. require sealed design (PE) plans. Retaining wall design review by Engineering is required prior to FSP approval. RESPONSE: Retaining wall plans have been provided with this submittal. h. Comment addressed. 13. Comment addressed. 14. Note: Permeable concrete pavers at dynamic transport plaza do not constitute a required WPO plan design feature, and Engineering does not object to removal of permeable concrete pavers at this location. Please ref. WPO202000058 for approved SWM-related design (Note: WPO202000058 relies on an off -site pond, located at Fifth Street Place residential development, for SWM). RESPONSE: Noted, these pavers are effectively a site aesthetic feature for which no WPONRRM treatment will be pursued. These will be installed per manufacturer specs, but do not count as a BMP and are not designed for runoff reduction. These pavers were promised on the rezoning application, and do need to be provided, so we will keep them. 15. C7: Provide storm runoff capture /conveyance for block 1 design at point runoff leaves 5.0% paved drive aisle; blue arrow, image, below: RESPONSE: to address potential for erosion, and to achieve conveyance, we have shown a swale which will direct this runoff into Inlet A5. A5 will be a DI-3B inlet in the future, with the Block 4 expansion, but for now we have this with a temporary grate top which will allow runoff into the structure. Inlet A5 has been always designed to receive this runoff. We have specified EC-3 matting within this swale as an additional precaution from erosion, and will work with the contractor to ensure proper stabilization occurs. 912 E. High St.. Charlottesville, VA 22902 1434.227.51401 shlmp-engineenrig.rom If you have any questions or concerns about these revisions, please feel free to contact me at Keane@skimp-en ing eerine corn or by phone at 434-227-5140. Regards, Keane Rucker Shimp Engineering, P.C. 912 E. High St.. Charlottesville, VA 22902 1434.227.51401 shlmp-engineenrig.rom