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Home My WebLink AboutSDP202100011 Review Comments Final Site Plan and Comps. 2021-05-27V 401 McIntire Road, North Wing County of Albemarle Charlottesville, VA 22902-4579 COMMUNITY DEVELOPMENT DEPARTMENT Telephone:434-296-5832 WWW.ALBEMARLE.ORG Site Plan review Project: Boys and Girls Club — Driver's Ed —Final Site Plan Plan preparer: Kim Reeser, PE /Timmons Group kim.roeserAtimmons.com Craig Kotarski, PE, Timmons Group — 608 Preston Ave, Suite 200, Charlottesville, VA 22903 [craig.kotarski(jjtimmons.com ] Owner or rep.: Boys and Girls Club, 1000 Cherry Ave., Charlottesville, VA 22903 [ ipierce(a bQclubcva.ora ] Plan received date: 10 Feb 20201 (Rev. 1) 10 May 2021 Date of comments: 28 Mar 2021 (Rev. 1) 27 May 2021, No objection Reviewer: John Anderson Project Coordinator: Cameron Langille * Engineering deems Initial Site Plan detail adequate for approval of the ISP. For Final Site Plan Approval: [ Note: Comments below are from ISP (SDP202000069) Engineering review comments, 12/10/20.] 1. VSMP-WPO plan must be approved prior to FSP approval. WPO202000051 is under review. (FSP) Acknowledged. (Rev. 1) NA. VSMP/WPO plan for project was approved 4/15/21, WPO202000051. 2. C5.0. C5.1: Label underground detention systems in plan /profile view, to correlate or distinguish systems from one another. (FSP) Addressed. 3. C7.0: a. Str. 106, 15" basin /vertical structure is proposed with 24" DIA upstream /downstream pipes. Confirm this riser /pipe diameter combination works. (ESP) NA, per comment 3b. b. Comment 3.a. irrelevant, since: Ensure all structures ( pipes, inlets, grates, risers, MHs) within public drainage easement/s conform with VDOT R&B standards. VDOT Std. for Nyloplast dome grates /risers may not exist, though HDPE pipe is permissible. Replace Nyloplast risers with VDOT Std. MH wherever they exist within public drainage easement, i.e., receive runoff from a public road or are located downstream of a SWM facility (detention, for example, Str. 106, for example). (FSP) Addressed. Applicant (letter d. 2/4/21): `Structures within the public drainage easement have been replaced to meet VDOT standards. See plan on Sheets C5.0-05.1 and profiles on Sheets C7.0-C7. L' c. Nyloplast (in -line v. terminal) risers may represent near -term savings, but for storm conveyance requiring up to 24" DIA pipe up -/downstream of Nyloplast risers, Std. VDOT MH structures with VDOT Std. grates appear a more cost -balanced approach, in the long term. Nyloplast risers are likely less durable for systems with pipe diameter in the 18"-24" DIA range. Also, it is important to provide storm conveyance system access via MH lid /frame, w/ steps. (ESP) Addressed. Applicant: `Per response to 3b above, structures within the public drainage easement have been replaced to meet VDOT standards. In doing so, the larger -diameter Nyloplast structures have been removed.' d. Provide and label V2" steel plate in MH floors if vertical interval (INV IN/OUT) >4' (Str. 106, for example). Ref. VDOT Drainage Manual, pg. 9-38. Link: Engineering Review Comments Page 2 of 3 http://www.virginiadot.orglbusiness/resources/LocDesIDrainageManuallchal)ter9.I)df (FSP) Partially addressed. As follow-up: Provide steel plate label for Str. 102. (Rev.1) Addressed. 4. C7.0 C7.1: Please label SWM detention systems to distinguish one from the other. (FSP) Addressed. 5. C0.0: Include reference to VSMP /WP0202000051. (FSP) May persist. Applicant: `Reference has been added to sheet C0.0.' Cannot locate reference. Please direct reviewer to C0.0 reference. (Rev. 1) NA. Review error: Reference located in final site plan title. 6. C0.0: Recommend include ref. to SDP202000069. (FSP) Addressed. 7. C4.1: Recommend a low -profile wall (1.5'-2' ht.) between 5' walk and 24' w drive aisle adjacent to grass seating area. Spectators may occupy walk, at times, as non -pedestrians. Patrons /guests may congregate /stand on the walk to watch events. Immediate proximity of passing cars with no separation, and of vehicles reversing from spaces, and an uncertain mix of young drivers -youthful spectators/club patrons (often distracted) at this location, gives pause. Recommend provide a barrier. (FSP) Withdrawn. Applicant: `Sidewalk width has been increased to 6 feet in order to provide more walking space and separation from the drive aisle.' 8. C4.2: Engineering expresses reservation with crosswalk proposed at an angle since detectable surface may misdirect visually -impaired pedestrians to a curb, or parking space rather than to a CG-12 receiving ramp. (FSP) Addressed. 9. C4.2 C5.1: Revise CG-2 to CG-6 where runoff concentrates against curb, for example, drop-off lane that connects with Lambs Lane in front of the building (FSP) Addressed. 10. C5.0: With WPO, provide additional details for discharge from pipe 301. Ultimate discharge from this portion of site is unclear. Also, revise storm pipe profile, C7.1 at this location to clarify whether pipe 301 discharges above or below grade. Any existing storm system element/s relied upon for this development must be evaluated for fitness and capacity to limits of analysis, including, at a minimum, visual check on integrity and condition of any existing pipes. Image below appears to indicate inverts inaccessible. (FSP) Addressed. Applicant: `Pipe 301 discharges below grade, tying into the existing manhole structure. The profile has been updated to remove end section label and clarify intent at this location. Additionally, a label has been added requiring contractor to field verify condition and invert of structure prior to construction.' [ Image removed with FSP comments.] 11. C5.0: With WPO, provide overview (large-scale inset) to show graphically how this portion of the site discharges to slopes below Ivy Creek School Main Building. Evaluate these sections of existing storm conveyance for integrity and fitness. (FSP) Addressed. Applicant: `This portion of the site is tying into the existing manhole, as shown on Sheet C5.0. Downstream pipes have been evaluated, and calculations are provided within the design calculations, provided with the WPO submission.' 12. C5.1: a. Ensure parking conforms with an available option listed at ACDSM, p. 17 (i.e., may require bumper blocks). (FSP) Addressed. b. With WPO plan, evaluate potential for erosion along channel formed by existing -proposed contours' ensure velocity is non -erodible. Provide typ. channel section at blue line leealien,r 13e4ew. [Image removed with FSP comments] (FSP) Addressed. Applicant: `Channel sections and ditch calculations have been provided on Sheet C5.0 for all proposed drainage ditches.' c. Revise angle of entry of pipe 215 into Str. 204, since angle is acute. Change in direction in flow through a MH structure should be > 90-deg to limit potential for obstruction. (FSP) Addressed. d. Handrails are required for tiered retaining walls (C5.0 C5.1) for safety, and to discourage trespass. (FSP) Addressed. Applicant: `Tiered retaining walls are no longer proposed with this project. However, handrail has been provided with retaining walls where required to provide visual and physical barrier. See Sheets C5.0 - C5.1' e. Recommend handrail at building exterior, NW comer of narrow main level west wing. At this location, an esplanade abuts a steep graded slope that falls to tiered retaining walls. (FSP) Addressed. f. Reference and incorporate grading standards at 18-4.3.3 into design; please especially note requirements at 18-4.3.3.13.1, concerning rounding off. [ Eff. 7/15/20 ] (FSP) Addressed. Applicant: `County grading standards have been incorporated into design.' Also: Engineering does not object to Timmons Group Boys & Girls Club - Driver's Education Critical Slopes Waiver - Engineering Review Comments Page 3 of 3 Special Exception Request d. 2/10/21, to disturb approximately 0.40 Ac. Critical Slopes. Note: Engineering did not object to a previous design that disturbed z0.79 Ac. critical slopes. A separate email /Memo to follow. g. Ensure runoff from inclined paved access to 4 wooden sheds does not enter proposed dumpster enclosure, but instead reaches Str. 208. (FSP) NA. Applicant: `The proposed dumpster enclosure has been relocated per owner recommendations. This comment is no longer applicable.' h. Resolve inlet Str. 206-sidewalk conflict. (FSP) Addressed. i. Additional FSP review comments possible. (FSP) As follow-up: i. C7.0: Provide Note specifying % compaction in fill section beneath pipe 214B given flat slope (min. 0.5%), pipe length, and HDPE material. Deflection at 0.5% slope may cause post -construction repair or bond issues. Image, below [Image removed with Rev. 1 comments.] (Rev. 1) Addressed. ii. C7.0: Provide safety slab for MH structure ht. > 12', Str. 108, 110, for example. (Rev. 1) Addressed. iii. C8.0/C4.1: Coordinate design of sanitary pump station with VDH. Provide reliability data /information required by VDH. Engineering Division has not reviewed Bruce W. Strickland, Jr, PE, pump station design: plan /section views, site plan, pump curves. County Engineering makes no warranty concerning fitness of pump station or FM design relative to state sewage collection and treatment (SCAT) regulations. Also, recommend coordinate pump station /4" force main (FM) design (from new development to point of connection with existing FM) with ACSA/RWSA. (Rev. 1) Withdrawn. Applicant response (letter d. May 5, 2021): `VDH does not have jurisdiction over the wastewater pump station, it's regulated by DEQ. However, repair/replacement projects where the capacity and/or function is not changed do not require a Certificate to Construct from DEQ. This project includes replacement of an existing wastewater pump station. It was designed in accordance with SCAT Regulations and meets Class I reliability requirements. The pump station and force main will be privately owned and maintained by ACPS, but as a courtesy we have notified ACSA/RW SA of this project.' Please feel free to call if any questions: 434.296-5832 -x3069 Thank you SDP202100011 Boys and Girls Club Drivers Ed ESP 052721_revI