HomeMy WebLinkAboutZMA202100016 Review Comments Zoning Map Amendment 2022-12-15From: Austin Marrs <amarrs@rivanna.org>
Sent: Thursday, December 15, 2022 3:59 PM
To: Bill Fritz <BFRITZ@albemarle.org>
Cc: Dyon Vega <DVega@rivanna.org>; devreview@rivanna.org; Jennifer Whitaker
<jwhitaker@rivanna.org>; Scott Schiller <sschiller@rivanna.org>; Richard Nelson
<rnelson@serviceauthority.org>; Jeremy Lynn <jlynn@serviceauthority.org>; vfort@rivanna.org;
Michelle S. Simpson, PE <msimpson@rivanna.org>
Subject: RE: ZMA202100016 - North Fork UVA Discovery Park - RWSA Comments
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Good Afternoon Bill,
Following up on this issue, RWSA has completed a capacity analysis, and engaged in several
conversations with ACSA and the UVA Foundation (UVAF) over the past several months. Please see
below for an overview of this capacity analysis of both RWSA's water and sanitary sewer systems:
Water
RWSA is currently working on several relevant projects, including the Airport Road Finished
Water Pump Station (APFWPS) and a second watermain crossing of the South Fork Rivanna
River. APFWPS will ultimately become the primary water source of the Piney Mountain Pressure
Zone (serves NFRP), and will ultimately allow the North Rivanna Water Treatment Plant
(NRWTP) to be decommissioned, once the second crossing of the South Fork Rivanna River is in
place, scheduled tentatively for 2025.
Prior to the completion of the Second South Fork Rivanna River Crossing, RWSA reserves the
right to withhold approval on any site plan if water capacity is unavailable. Site plans for each
phase will be reviewed and approved on a case -by -case basis. Build out in each phase (1-4)
should not exceed the projected water usage outlined in the preliminary phasing plan as shown
in the table below. This table was formulated using buildout densities by phase from the
applicant, as well as unit demands from RWSA's 2020 Urban Water Demand Study.
Phase
Water Demand(gallons per day - d
1
2023-2025
165,125
2
2026-2028
120,000
3
2029-2031
82,800
4
2032-2034
45,000
Total
412,925
• The proffer requiring County approval for single industrial users over 125,000 gal/day should
remain in effect.
• RWSA will monitor metering data from NRWTP and APFWPS, as well as sewer flow meters (see
below) and NFRP irrigation meters as necessary to help further determine when additional
pumping may be required at APFWPS (or other system improvements as may be
required). RWSA reserves the right to withhold approval on any site plan if water capacity is
unavailable.
• Adequate drinking water capacity is currently available for this proposal, so as long as the
conditions discussed above are followed.
Sanitary Sewer
Similar to drinking water, adequate sanitary sewer capacity is currently available to support the
desired phasing at NFRP, however, it is likely that upgrades to the Powell Creek Interceptor will
need to be significantly advanced from the original 2066 timeframe from the 2016
Comprehensive Sanitary Sewer Model Report.
As a result, RWSA and ACSA will require that UVAF fund and support a new permanently
installed sanitary sewer flow meter within the effluent pipe for the Research Park. More
specifically, UVAF will reimburse RWSA to install, read, and maintain a flow meter through its
Contract with Frazier Engineering (now CHA Consulting) downstream of NFRP (along Lewis and
Clark Drive) to determine baseline sewer flows and monitor additional sewer flows from new
development.
Data from this flow meter will continue to be monitored as additional flow comes online, and
will be utilized to better determine the updated timeline for upgrades to the Powell Creek
Interceptor and downstream sewers as appropriate. RWSA reserves the right to withhold
approval on any site plan if sewer capacity is unavailable. Site plans for each phase will be
reviewed and approved on a case -by -case basis. Build out in each phase (1-4) should not exceed
the projected sewer demand outlined in the preliminary phasing plan as shown the table
below. This table was formulated using buildout densities by phase from the applicant, as well
as unit demands from the SCAT Regulations. Please note that this is average daily flow and
does not include peaking factors for wet -weather events caused by I&I.
Phase
Sewer Demand(gallons per day - d
1
2023-2025
267,625
2
2026-2028
207,000
3
2029-2031
82,800
4
2032-2034
45,000
Total
602,425
In summary, RWSA and ACSA believe that adequate capacity is currently available to support this
rezoning request, so long as the conditions discussed above are followed by the applicant. In reviewing
the latest package submitted by the applicant on August 1, we noted the dialogue on Carriage
Units/Accessory Apartments. We also noted that there is approximately 1 million square feet of
PDIP/Commercial space discussed in the latest package not included in the phasing plan. Please note
that the analysis above and all previous discussions with the applicant have been based upon the
amount of development detailed within the phasing plan (max 1400 residential units, 2 million square
feet of PDIP/commercial). Water and Sewer capacity for development beyond the phasing plan cannot
be guaranteed. If you have any questions or concerns, please do not hesitate to contact me.
Thanks,
Austin
G. Austin Marrs, P.E.
Senior Civil Engineer
Rivanna Water and Sewer Authority
RIVANNAA
WATER & SEWER
(434) 977-2970, Ext. 164
695 Moores Creek Lane
Charlottesville, VA 22902
www.rivanna.ore
From: Victoria Fort <vfort@rivanna.ore>
Sent: Wednesday, January 19, 2022 5:18 PM
To: bfritz@albemarle.ore
Cc: Austin Marrs <amarrs@rivanna.ore>; Dyon Vega <dveea@rivanna.ore>; Development review
<DevReview@rivanna.ore>; Jennifer Whitaker <jhitaker@rivanna.orR>; Scott Schiller
<sschiller@rivanna.org>; rnelson@serviceauthoritv.org
Subject: ZMA202100016 - North Fork UVA Discovery Park - RWSA Comments
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 ZMXs 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 RWSXs 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 RWSXs 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