HomeMy WebLinkAboutZMA202100016 Review Comments Zoning Map Amendment 2022-01-19From: Victoria Fort <vfort@rivanna.org>
Sent: Wednesday, January 19, 2022 5:18 PM
To: Bill Fritz <BFRITZ@albemarle.org>
Cc: Austin Marrs <amarrs@rivanna.org>; Dyon Vega <DVega@rivanna.org>; devreview@rivanna.org;
Jennifer Whitaker <jwhitaker@rivanna.org>; Scott Schiller <sschiller@rivanna.org>; Richard Nelson
<rnelson @servicea uthority.org>
Subject: ZMA202100016 - North Fork UVA Discovery Park - RWSA Comments
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RWSA staff has reviewed application ZMA202100016 - North Fork UVA Discovery Park. Please see below
for the completed copy of the form that was provided to RWSA by Elaine Echols for SP & ZMA
Applications:
To be filled out by RWSA for ZMA's and SP's
1. Capacity issues for sewer that may affect this proposal Yes
2. Requires Rivanna Water and Sewer Authority Capacity Certification Yes
3. Water flow or pressure issues that may affect this proposal Yes
4. "Red Flags" regarding service provision (Use attachments if necessary) Yes
RWSA has the following capacity concerns for both water and sanitary sewer that may affect this
proposal:
• Per the presentation RWSA's Executive Director made to the LUEPC on December 17, 2021
(link here), as well as the attached presentation that was made to the RWSA Board of Directors
(which includes City Utilities and ACSA Staff, as well as City and County elected officials) on
December 14, 2021, significant increases in water demand may necessitate acceleration of
several important projects, most notably, the South Rivanna Reservoir (SRR) to Ragged
Mountain Reservoir (RMR) Transfer System. This information was also relayed to County
Economic Development Staff on October 14, 2021, when discussions on RWSA's existing water
capacities and proffers related to the North Fork Research Park were taking place.
• RWSA's Piney Mountain Pressure Band (North Zone) historically consumes about 500,000
gallons of water per day (gpd). While RWSA did account for growth in this area in a recent
Urban Water Demand Study, this rezoning proposal far exceeds the anticipated growth in this
area. The study estimated 42,000 gpd of additional demand from the North Fork Research Park
through 2030, and an additional 172,000 gpd through 2070. This proposal has the potential to
add over 500,000 gpd of additional demand to the North Zone, assuming maximum build -out
(estimated 270 gpd per DU and 90 gpd/ksf of commercial office space based on ACSA Design
Standards).
The Narrative correctly mentions that RWSA is currently constructing a new finished water
pump station to better support the Piney Mountain Pressure Band. However, as indicated in
the RWSA Board Presentation attached (slide 6), this pump station is just one of nine projects
in RWSA's Capital Improvement Plan that will be required to support large water demand
increases in this area, at a total cost of around $213 M. In addition, since this pump station
utilizes water from RWSA's Urban Pressure Band to serve the Piney Mountain Pressure Band,
the raw water demands from an expanded North Fork Research Park may also necessitate
acceleration of improvements to the SRR to RMR Transfer System ahead of its planned FY27 —
FY33 timeframe, depending on the buildout schedule.
• For Sanitary Sewer, all sewage flows from this development flow through the RWSA Powell
Creek Interceptor (PCI). Based upon our latest Comprehensive Sewer Study (2016) and recent
flow metering data, the stretch of PCI that receives the flow from the Research Park sees about
0.7 million gallons per day (MGD) of sewage flow. Based upon our previous modeling efforts,
upgrades were anticipated in the upper 18" and 21" reaches of PCI around 2066, at an
approximate cost of $16M (present-day dollars). Assuming the maximum buildout proposed
by this rezoning, the potential post -development flows in PCI could be several decades ahead
of schedule, and RWSA would need to perform a full evaluation once the flows are better
understood in order to determine the necessary upgrades to PCI, as well as possible upgrades
in downstream sewer reaches.
• In summary, RWSA does not concur with the Utilities Section on page 14 of the Application
Narrative, and believes that there could be some water and sanitary sewer capacity limitations,
depending upon the final buildout scope and schedule. In order to more appropriately evaluate
this Rezoning Application, RWSA needs the following information:
o More precise buildout magnitude (number of units, type of units, etc.)
o Anticipated buildout schedule (what units are being built at what time)
o Any further projected water and sewer demand information for North Fork that may
be available
Please let us know if you'd like to discuss in more detail prior to sending comments to the applicant.
Best,
Victoria
Victoria Fort, P.E.
Senior Civil Engineer
Rivanna Water and Sewer Authority
695 Moores Creek Lane
Charlottesville, VA 22902
(0): (434) 977-2970 ext. 205
(F): (434) 295-1146