HomeMy WebLinkAboutSDP200800064 Review Comments Preliminary Site Plan 2008-06-02*-&A
County of Albemarle
Department of Community Development
Memorandum
To: Lisa K. Glass, Current Development Project Planner
From: Amy Pflaum, Current Development Engineering Review
Date: 5 May 2008
REV #1 Comments: 2 June 2008
Subject: Georgetown / Hydraulic Professional Offices (SDP- 2008 - 00066)
The preliminary site plan for Georgetown / Hydraulic Professional Offices has been reviewed. Before
engineering can recommend approval the following items must be addressed:
1. It is difficult to distinguish between proposed and existing features on this plan, please provide
line shading or another mechanism to "lowlight" the existing features.
REV #1: It appears that the existing sidewalk will remain all along the property, other than in the area
of the proposed curb cut and taper lane at the proposed entrance. With the addition of the 9' sidewalk,
there will be 15' of concrete sidewalk fronting the length of the site on Hydraulic Road. This will
need to be graphically clarified and detailed information regarding the proposed curb cut will be
required on the Final Site Plan.
2. Please include a conceptual stormwater management plan in the preliminary site plan. Show
boundaries of drainage areas and location of proposed detention facilities. What is the proposed
15 -inch storm sewer pipe outletting to? Because this property is in the rural area, no removal rate
credit will be given. Engineering anticipates that 2 Filterra units will not be enough to achieve the
required removal rate for this highly impervious site. [18- 32.5.6.s]
REV #1: Although your comment response letter states that drainage areas are shown on the site plan,
I am unable to find them. I refer you to the Albemarle County Design Standards Manual for the
requirements of a "conceptual" stormwater plan:
A. Stormwater management Design Plans:
1. Preliminary: Conceptual stormwater management is required to be shown on preliminary
plats and preliminary site plans.
a. The concept plan must include the target removal rate for each drainage area...
No further information has been provided regarding the flow from the 15" outlet pipe. Please
demonstrate that this flow is being released into an adequate downstream channel. Please provide any
easements necessary (or letters of intent from neighboring property owners) to convey this flow to such
channel.
Also, it has been confirmed with Albemarle County's Development Areas Principal Planner, Elaine
Echols, that this parcel of land is not within the Development Area.
3. Please show the traffic lane lines on Hydraulic and Georgetown roads. [18- 32.5.6.s]
REV #1: Traffic lanes have been added to the plan. VDOT has also required that details of turn
movements, storage lengths, and existing and projected traffic volumes be added. Please see VDOT
Current Development
Engineering Review Comments
Page 2 of 2
comments from the May 8, 2008 Site Review Meeting.
More detailed information regarding the proposed curb cut, including turning movements, lane widths
and spot elevations will be required on the Final Site Plan.
4. If a construction easement will be required to build the proposed retaining wall next to TMP 6017-
1, please show the easement on this plan.
REV #1: Comment has been noted by applicant.
5. Please show the necessary grading required to construct a shallow- sloping spot in the Conservation
Area for the picnic tables.
REV #1: Comment has been addressed.
6. The existing 8 -inch ACSA waterline shown along the southern edge of the property does not
appear to be within the existing 12 -foot Utility Easement. Please verify that this waterline is in an
existing easement or provide a new easement.
REV #1: Comment has been noted. Applicant is working with ACSA regarding the waterline and
easement.
7. VDOT approval is required for any work affecting the public right -of -way.
REV #1: Please see VDOT comments from the May 8, 2008 Site Review Meeting.
File: E2_psp_ADP_sdp200800064