HomeMy WebLinkAboutSDP202100065 Correspondence 2021-11-19SHIMP ENGINEERING, P.C.
Design Focused Engineering
November 19, 2021
John Anderson
County of Albemarle
Department of Community Development
401 McIntire Road, North Wing
Charlottesville, Virginia 22902
RE: Response Letter #1 for SDP2021-00065 Albemarle Business Campus: Block 1
Dear John,
Thank you for your review of the final site plan for Albemarle Business Campus: Block 1. This letter
contains responses to County comments dated September 24, 2021.Our responses are as follows:
1. Site plan approval requires WPO plan approval.
RESPONSE: Comment received.
2. WPO plan approval requires easement plat recordation for on -site SWM facilities.
RESPONSE: Comment received. Easement plats will be recorded prior to WPO plan approval.
3. Provide public drainage easement for sections of storm pipe downstream of SWM facilities.
RESPONSE: The SWM facilities proposed will be connecting to existing facilities on
Mountainwood Road in the public ROW.
4. C1
5. C6
a. Please list associated and active WPO plan for this parcel: WPO201800044, VSMP Plan
Amendment, Royal Fern Phase 1, Now ABC Borrow Site.
RESPONSE: This note has been added to the cover sheet.
b. Please submit WPO201800044 Amendment 42 Application at earliest convenience.
RESPONSE: Comment received. This application is forthcoming.
a. Provide and label CG-12 at site entrance.
RESPONSE: Please see C6 for included CG-12 at site entrance.
b. Clearly label ramp and curb type at HC-parking spaces.
RESPONSE: Labels for types are now called out at each HC parking ramp. Please see
revised site plan.
c. Label HC-parking space signs, provide typ. detail for HC-parking space signs.
RESPONSE: Signage is to be provided at each HC-parking space. Please see the revised
site plan with signage call -outs.
d. Provide pavement markings or yield -stop sign to establish internal parking circulation
right-of-way.
912 E. High 5t. Charlottesville, VA 22902 1434.227.5140 1 shimp-engineeong.com
6. C4
RESPONSE: Comment received. Internal stop signs are provided at intersections to
encourage safe maneuvering throughout the parking lot area.
e. Label curb types (CG-2, CG-3, CG-6, roll-top, etc.).
RESPONSE: Comment received. Please see the revised site plan for the curb type labels.
f. Please label feature that appears to be an outdoor court between the clubhouse and
building 102,
RESPONSE: This area is designated as a pool. Please see the revised site plan for the
included label.
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.
RESPONSE: Thank you for your comment. Fire/rescue comments did not include turn
radius at north end of parking lot.
h. Provide and lal, amps at either end of 4' stamped concrete pedest-
RESPONSE: Comment received. Ramps and crosswalks are now included at each end of
the central pedestrian path.
i. Revise design to avoid sight line conflict at south corner of building 102.
RESPONSE: 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.
RESPONSE: Comment received.
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.
RESPONSE: Comment received. The exclusion of this portion of the property is called
out on C4 Existing Conditions.
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.
RESPONSE: Comment received. This information has been added to C4 Existing
Conditions.
C7: Provide bypass for Stormtech systems, should system outlets (low flow weir orifices)
obstruct. Consider system failure. Provide bypass piping dci (sheet next submittal.
RESPONSE: Comment received. Please see the revised utility plan as well as the detail provided
on C9.
8. C8
a. Obtain public drainage easement for new storm pipe downstream of SWM facilities
proposed to be off -site, from property line to the point new storm pipe connects with
existing storm network on Mountainwood Road.
912 E. High St. Charlottesville, VA 22902 1434.227.5140 1 shimp-engineering.com
9. C9
RESPONSE: A public drainage easement is not provided in this location as the new
storm pipe is located in the public ROW.
b. Provide safety railing labels and railing details for retaining walls >4'.
RESPONSE: Comment received. Safety railing is to be provided for the 6' retaining wall,
adjacent to building 103.
c. Note: A separate building permit is required for wall ht. >3-ft, unless integrated into
building design.
RESPONSE: Comment received.
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.
RESPONSE: Comment received. Geotechnical plans are forthcoming.
a. Str. A3, A4: Provide note for''/2" steel plate in floor, since INV IN — INV OUT>4
RESPONSE: Comment received. Details of the structure are provided on C9.
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.
RESPONSE: That is a correct analysis. Full detail and explanation forthcoming in WPO
submittal. This system is sufficient to detain and manage stormwater runoff from this
site.
c. Provide LD-204, LD-229 stone inlet and stone drain design computations. Additional
comments on drainage design possible.
RESPONSE: Comment received. We will be sure to include this in WPO plan sheets.
10. C16: Please include primitive path detail.
RESPONSE: The primitive path has been removed and replaced with typical sidewalk material.
Please see the revised site plan.
11. C17: Engineering defers to VDOT on MOT plan for public rights -of -way.
RESPONSE: Comment received.
If you have any questions or concerns about these revisions, please feel free to contact me at
Rachel@shimp-en ing eerieg com or by phone at 434-227-5140.
Regards,
Rachel Moon
Shimp Engineering, P.C.
912 E. High St. Charlottesville, VA 22902 1434.227.5140 1 shimp-engineering.com