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HomeMy WebLinkAboutSUB202100149 Review Comments Road Plan and Comps. 2022-09-30�q off nig 401 McIntire Road, North Wing County Charlottesville, VA 22902-4579 of Albemarle Telephone: 434-296-5832 COMMUNITY �tBGIN�r' DEVELOPMENT DEPARTMENT WWW.ALBEMARLE.ORG Road Plan Review Project title: HTC Area C Townhomes, Block II — ROAD Plan Project file number: SUB2021-00149 Plan prepares Shimp Engineering, 912 E. High St., Charlottesville, VA 22902 Keane Rucker, FIT, keane(a),shimp-engineering.com Justin Shimp, PE, Iustin(d,)shimp-engineermg.com Owner or rep.: Post Office Land Trust, AnnMae Holdings LLC Charles Wm Hurt and Shirley L Fisher, Trustees charlie(i�virginialandcompany. com P. O. Box 8147, Charlottesville, VA 22906 Plan received date: 7 Sep 2021 (Rev. 1) 3 Mar 2022 (Rev. 2) 6 Jul 2022 (Rev. 3) 12 Jul 2022; email K. Rucker w/ rev. sheet C 13 [ July 12, 2022 10:46 AM] (Final) Pending — request for road profile inset, 105' section Purple Flora Bend Date of comments: 19 Oct 2021 (Rev. 1) 11 May 2022 (Rev. 2) 8 Jul 2022 (Rev. 3) 12 Jul 2022, county email, July 12, 2022 11:39 AM (Final) 30 Sep 2022 (prelim. Approval email /Sep 30, 2022 8:21 AM); 30 Sep 2022; pending receipt, road profile, 105' section — No effect on Approval Reviewer: John Anderson, PE SUB202100149 — ROAD Plan is approved — VDOT. ACSA. RWSA indicate No objection 1. Add detail for the yard drain structures. (Rev. 1) Addressed. Applicant: `This has been added to the site plan, Sheet C 19, This is only shown on the site plan since it is a site plan feature —as roads could be constructed without yard drains.' 2. C3 a. Ensure CG-12 ramp on SW side of Zinnia Crest is entirely within public RW of Berkman Drive. (Rev. 1) Addressed. b. Provide `No parking' signs between driveways/parking spaces where street width does not meet standards for street parking. (Rev. 1) Addressed. c. Label lots for ease of reference. (Rev. 1) Addressed. d. Please revise sheet title to site layout. (Rev. 1) Addressed. e. Revise `ribbon curb' label to CG-7, recommend label reference CG-7 (roll top) detail on C 13. (Rev. 1) Addressed. Applicant response (letter d. Mar-8, 2022): `Revised to roll-top curb. Roll- top is similar to CG-7 (CG-7 is most accurately called "mountable" curb & gutter) where CG-7 is mountable (ideal design for higher speed arterials, roundabouts, and landscape islands), rolltop is designed for urban street perimeter control with dense driveway spacing. Please refer to VDOT Road Design Manual Appendix B 1: Subdivision Street Design Guide —section 4 Subsection H: "Curb and Gutter Designs." This list Rolltop /curb as an approved design for subdivisions. This is noted here, to address your comments 3a and 8a below.' f. Trim /revise steps at two lots, Connor Drive, that encroach on existing sidewalk. (Rev. 1) Addressed. 3. C4 4. C5 Engineering Review Comments Page 2 of 3 g. Road name signs cannot be located on top of stop signs. Please refer to the Road Naming Manual for locations (Part III, Section 3, Location of Post and Sign). (Rev. 1) Addressed. h. Add a road name sign for the Zinnia Crest and Orchid Bend intersection. (Rev. 1) Addressed. i. Remove the stop sign on Orchid Bend at the Flora Bend intersection. (Rev. 1) Addressed. j. Add speed limit signs at both entrances. Consistent with AASHTO, the speed limit must be posted at 15 MPH. (Rev. 1) Addressed. k. Recreation area trail is shown passing over the yard drain. Please relocate. (Rev. 1) Addressed. a. Drive entrances do not appear to meet VDOT CG-913 geometry. Ribbon/roll-top curb cannot extend through driveways. Each driveway must have a CG-9 entrance that meets VDOT standards. Add note to this effect and show concrete entrances that match the standard VDOT detail on the plan sheets. (Rev. 1) Withdrawn. Applicant: `Plans clarified. Lots with primary street frontage on private streets, and with front -load, single -car garages (lots 34-56) are placed on the traditional County street section with typical curb and gutter, planting strip, and sidewalk. The remaining lots utilize the internal Road A & Road B1 as alleyways, and have rearload garages. For these rearload units, since the streets effectively act as alleyways, and since these units alignment creates a very high density of driveways, such that a typical CG-913 entrance would be impractical and create a wave -like concrete effect along the edge of pavement, we have specified Roll-top curb (in form, a flattened, rounded curb&gutter, designed for vehicular traverse) as the curb and gutter treatment. As was mentioned in response 2e above, this is specifically allowed by VDOT in subdivision streets. This design has also been utilized in similar townhome developments in Albemarle County, for example, the townhomes in "Abington Place" in Hollymead Town Center, across form Shimp Engineering's plan for Block 3. Also, the Townhomes in the "Pavilions at Pantops Phase 3" feature continuous rolltop curb for the dense townhome driveways.' Engineering accepts this response /comment withdrawn. b. Relocate 12" HDPE in conflict with structure elements for units facing Timberwood Blvd. Also, move 12" HDPE pipe along edge of end unit outside of the lot (highly recommended), or center pipe within the drainage easement at a minimum. Label this easement as a private drainage easement. (Rev. 1) Partially addressed. Applicant: `This is now an 8" HDPE roof drain system. It is at the edge of the new lots. It has very shallow burial, and (along with the rest of the 8" roof drains in this development) can be excavated by hand, i.e. with a shovel. As such, small drainage easements are provided. Practically speaking, the extent of maintenance activities will be flushing the drain lines using the yard drains as access points. Labelled as private drainage easements throughout.' As ollow-W: Please check /revise relic private drainage easement linework on Lots 11-13, especially where linework crosses structures (front porch). (Rev. 2) Addressed. c. Linework for "new 6' drainage easement" behind Lots 34-42 isn't showing. Please turn on or add. Label this easement as a private drainage easement. (Rev. 1) Addressed. d. Label all drainage easements as being private. (Rev. 1) Addressed. e. Building comer on Lot 26 appears to conflict with ACSA easement. Adjust building but also ensure 18-ft deep driveway is provided. (Rev. 1) Addressed. a. Label streets for ease of reference. (Rev. 1) Addressed. b. Please evaluate flow line depth at Lot 34 and lot 49 to ensure drives will not flood. 28' vertical fall between Berkmar Drive and inlet at 4 parallel parking spaces on Flora Bend poses driveway entrance flooding concern. (Rev. 1) Addressed. Applicant: `Noted. See LD-204 spread & depth calculations, added to C 16, for structure A6 — due to slope, depth & spread are not large at Lot 34 & 39.' c. Evaluate Lot 50 drive entrance flow line depth. Ensure no flooding of drive entrance during design event. (Rev. 1) Addressed. d. Light grayscale spot elevations for several lots on Orchid Bend are inconsistent with proposed grade. Please reconcile. (Rev. 1) Addressed. 5. C9 6. C10 7. C12 8. C13 9. C15 Engineering Review Comments Page 3 of 3 e. Recommend spot shots, consistent with proposed grade, lots 27-56, to help ensure construction prevents drive entrances from flooding. (Rev. 1) Addressed. f Proposed grade on SE side of Lots 27-33 is somewhat ambiguous: stairs are shown, indicating substantial grade change, lots 30-33, a grade change that appears to require grade steeper than 3:1 at lot lines immediately adjacent to existing sidewalk. Provide linework, labels, etc. to clarify design intent. Proposed grade may not exceed 2:1. (Rev. 1) Addressed. a. Relocate tree at CG-12 at radius in Flora Bend to provide separation between ramp /walk and street tree. (Rev. 1) Addressed. b. Provide notes that require limbing those trees at 70'R curves [that] may obstruct Min. 95' stopping sight distance to allow travelers on travelways to safely stop for vehicles exiting unit drives. (Rev. 1) Addressed. c. Label proposed grade on Lots 30-33 at existing sidewalk. If steeper than 3: 1, propose permanent vegetation hardier than grass (groundcover). (Rev. 1) Addressed. Applicant: `Note added. Grade shown on grading plan.' a. Review and correct profile labels, all profiles have the same label "Storm Profile Al -AT" (Rev. 1) Addressed. b. Provide note re. compaction for pipes and structures in fill, specify compaction consistent with VDOT standards. 8" HDPE line is quite susceptible to deflection unless compaction specified. (Rev. 1) Addressed. a. Provide stopping sight distance sight lines at internal stop intersections. (Rev. 1) Addressed. b. Show sight distance easement over lots where the sight distance line is located (Lot 27 & 28). Show on all applicable plan sheets. (Rev. 1) Addressed. Applicant: `ROW lines slightly revised, so as this is not needed on 27 & 28. Sight distance easement labelled where needed.' a. If C 13 roll top curb detail corresponds with ribbon curb, revise ribbon curb labels (0) to read `roll top' curb. Note that rolltop curbing is not allowed at driveway entrances. (Rev. 1) Addressed /withdrawn. Applicant: `Yes, this is internally corrected —there is no ribbon curb, it is rolltop curb. As stated above (reference attached VDOT Appendix B 1 sheet), this is allowed for driveways.' a. Update all road section captions to coincide with street names assigned to roads A and B. (Rev. 1) Partially addressed. Every caption on sheet C13 references Road A, Road B, or Road Bl. Captions, and sheets C6, C7, C8, ref. Road A, B1, B2. As follow-up: Recommend revise all road captions and C6-C8 sheet titles to specific road names: Orchid Bend, Purple Flora Bend, etc. Naming roads but then relying on Road A, B, B 1, B2 road section captions or sheet titles is somewhat confusing. (Rev. 2) Persists. Applicant response, letter d. 5-Jul 2022: `Noted, yes this was a bit confusing —road names /sheet titles updated to list both the road name and the AB designation.' As follow-up: Road names do not appear to be updated. Dom: —C 13 [Images removed with Rev. 3 /Final comments.] (Rev. 3) Addressed. Thank you. Please call if any questions — tel. 434.296-5832-x3069, or email ianderson2&albemarle.org SUB202100149 HTC Area C Townhomes block II RP 093022rev3,final.doc