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Home My WebLink AboutSDP202100065 Review Comments Final Site Plan and Comps. 2021-12-14 (2)t� OF ALB County of Albemarle COMMUNITY DEVELOPMENT DEPARTMENT �tBGIN�P' Site Plan review Project title: Albemarle Business Campus Block 1: Final Site Plan Project file number: SDP2021-00065 Plan prepares Shimp Engineering, 912 E. High St. Charlottesville, VA 22902 Keane Rucker [ keane(d,)shimo-engineering.com ] Owner or rep.: 5" Street Forest LLC / 250 W. Main St., Ste. 201 Charlottesville, VA 22902 [ kyle.redin er amail.com ] Plan received date: 3 Aug 2021 (Rev. 1) 24 Nov 2021 Date of comments: 3 Sep 2021 (Rev. 1) 14 Dec 2021 Plan Coordinator: Andy Reitelbach Reviewer: John Anderson 2. 3. 4. 401 McIntire Road, North Wing Charlottesville, VA 22902-4579 Telephone: 434-296-5832 WWW.ALBEMARLE.ORG Site plan approval requires WPO plan approval. (Rev. 1) Persists. Amendment Application to WPO2018- 00044 received 7 Dec 2021. Review pending. WPO plan approval requires easement plat recordation for on -site SWM facilities. (Rev. 1) Addressed. Provide public drainage easement for sections of storm pipe downstream of SWM facilities. (Rev. 1) Persists. Applicant response (letter d. Nov-19 2021): `The SWM facilities proposed will be connecting to existing facilities on Mountainwood Road in the public ROW.' As ollow-ug: Although the proposed SWM facilities connect to existing facilities within public ROW, the portion of storm pipe/s downstream of each underground detention facility requires public drainage easement, on -site. Please see blue circle sections of storm pipe, image below (WP02018-00044, Amendment, C5): e.. C , , t i Cl Engineering Review Comments Page 2 of 4 a. Please list associated and active WPO plan for this parcel: WPO201800044, VSMP Plan Amendment, Royal Fern Phase 1, Now ABC Borrow Site. (Rev. 1) Partially Addressed. As follow- u : Please revise title sheet note typo (WPO2020-00059) to read WPO2020-00058. b. Please submit WPO201800044 Amendment 42 Application at earliest convenience. (Rev. 1) Addressed. Amendment Application to WPO201800084 received 7 Dec 2021. 5. C6 a. Provide and label CG-12 at site entrance. (Rev. 1) Addressed. b. Clearly label ramp and curb type at HC-parking spaces. (Rev. 1) Addressed. c. Label HC-parking space signs, provide typ. detail for HC-parking space signs. (Rev. 1) Addressed. d. Provide pavement markings or yield -stop sign to establish internal parking circulation right-of- way. (Rev. 1) Addressed. e. Label curb types (CG-2, CG-3, CG-6, roll-top, etc.). (Rev. 1) Addressed. Asfollow-up: Revise CG-2 to CG6 wherever storm runoff concentrates against curbing. [18-4.12.15.g.] g. [bleamrytttvmpaM1M(auras anealdyemeMays.... noalto ube mabIage. atme.gea.11flrg areal ormmalagle:mthe fallowing o¢um9abool Of In all [ommer[lamnn:etuoonal developments humbug eight or more parking spode:lil In all muXHamlly deelllrg and townMuse developments real eight or more trading sp ca :131Mrtre mode ry to formal or circa rtommxafer runoff. (4) xTere a sl0exaid is Imated of me than lour feet from the edge of an amens able, and (5)where n rumor, do domain vMltular Palle to promot pedestrians and for f opeTy. Gutters shall be required where nonemor, to control or d irect stormwa ter runoff Thecounty engineer mr,-nae or mMlfy thisrequeemert if deemed ntte5zary to accommodate stormwater managemenf/BMG faull chl or Rest, uses lorMed In the Rural Areas Ml donirg hot f. Please label feature that appears to be an outdoor court between the clubhouse and building 102. (Rev. 1) Addressed. g. It is unclear whether site plan geometry at north end of parking lot allows adequate turn radius for fire rescue apparatus. Engineering defers to ACF&R. (Rev. 1) Withdrawn. Applicant: `Fire/rescue comments did not include turn radius at north end of parking lot.' h. Provide and label ramps at either end of 4' stamped concrete pedestrian path. (Rev. 1) Addressed. i. Revise design to avoid sight line conflict at south comer of building 102. (Rev. 1) Withdrawn. Applicant: `The sight line conflict is with the retaining wall set off of building 102, however, the top of wall is at grade to create a below -grade patio area for the basement unit.' j. Stripe pedestrian crosswalk at site entrance. (Rev. 1) Addressed. 6. C4 a. Please provide prominent plan label to identify portions of ABC development east of Old Lynchburg Road as Not Included in Final Site Plan for ABC, Block 1. (Rev. 1) Addressed. b. Recommend label/s (for portion excluded from ABC Block 1) identify plans that correspond with (and approve designs for) ABC Block 5; i.e.: SDP202100022, WPO202000058. (Rev. 1) Addressed. CT Provide bypass for Stormtech systems, should system outlets (low flow weir orifices) obstruct. Consider system failure. Provide bypass piping details (sheet Cl?) with next submittal. (Rev. 1) Persists. Applicant: `Please see the revised utility plan as well as the detail provided on C9.' As follow-up: If bypass design overlooked, please notify. Engineering notes Utility Plan, C7 does not appear to provide bypass at any location that may experience critical obstruction (but may have overlooked bypass design), including: a. Stir. C3. Cl is 33.05 LF 18" HDPE, 0.0% slope. Revise slope to provide positive drainage. This is an atypical detention system (small diameter pipe, no slope, flexible pipe material (HDPE)) with potential for deflection, ponding, or pipe joint issues not as prevalent as RCP material. Increase slope to positive value for HDPE, to lesser positive value for RCP, and please consider effect on at -grade facilities (parking, basement unit—bldg. 104), should storm pipes obstruct, or back up. Blue arrows, below, though not predictive, indicate possible flow paths should underground 0% pipe, Cl obstruct. Please provide bypass at Stir. C3. b. \✓ Str. C1: N I Engineering Review Comments Page 3 of 4 c. Please show inlets to each BMP in profile view (linework /perspective of each BMW). d. Provide storm profile, BMW2. Provide bypass, should entry point/s to BMP2 obstruct. e. Recommend high -flow bypass at Str. C1. f. Recommend high -flow bypass at Str. A4. g. Recommend high -flow bypass at Str. B1. 8. C8 a. Obtain public drainage easement for new storm pipe downstream of SWM facilities proposed to be off -site, a,.., opeFty line to the ,.,.......:..o ,.,..,.,o,....., ith oHOM04- on Read. (Rev. 1) Persists. Comment revised: Provide public drainage easement downstream of on -site SWM facilities to property line, also, item 3. above. b. Provide safety railing labels and railing details for retaining walls >4'. (Rev. 1) Addressed. 9. C9 10. 11 Engineering Review Comments Page 4 of 4 c. Note: A separate building permit is required for wall ht. >3-ft, unless integrated into building design. (Rev. 1) Reminder comment, item persists. d. Note: Sealed geotechnical design is required for retaining wall ht. >4' unless wall is integrated into building structural design, in which case it is reviewed with that building permit application. (Rev. 1) Persists. Applicant: `Geotechnical plans are forthcoming.' a. Str. A3, A4: Provide note for Y:" steel plate in floor, since INV IN — INV OUT >4'. (Rev. 1) Addressed. b. Design appears to route impervious area runoff from 3-1/2 residential buildings plus clubhouse and perhaps 2/3 of all paved parking to a 158 LF 60" StormTechTM system, while runoff from just 1-1/2 residential buildings and 1/3 of site parking route to a 125LF 60" StormTech chamber detention /treatment system. WPO plan should clarify disparity in runoff vs. detention /treatment system capacity. Note: the 125 LF system also appears to route to or through the 158 LF system. (Rev. 1) May persist. Applicant: `That is a correct analysis. Full detail and explanation forthcoming in WPO submittal. This system is sufficient to detain and manage storrnwater runoff from this site.' Engineering to evaluate with WPO201800044, Amendment #2 submittal. c. Provide LD-204, LD-229 stone inlet and storm drain design computations. Additional comments on drainage design possible. (Rev. 1) Addressed. Applicant: `We will be sure to include this in WPO plan sheets.' WPO2018-00044 Amendment #2 received 12/7/21. C 16: Please include primitive path detail. (Rev. 1) NA. Applicant: `The primitive path has been removed and replaced with typical sidewalk material.' C 17: Engineering defers to VDOT on MOT plan for public rights -of -way. (Rev. 1) Persists, but under VDOT purview. Additional su plement to comments) 1. VSMP /WPO2018-00044 Amendment #2 must be approved prior to FSP approval. 2. Public drainage and SWM facility easement plat /deeds must be approved prior to WPO plan approval. 3. Show and label SWM facility /public drainage easements on FSP and WPO2018-00044 Amendment #2. Please feel free to call if any questions. Thank you J. Anderson 434.296-5832 -x3069 SDP202100065 Albemarle Business Campus block I FSP 121421rev1-h doc