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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 CAUTION: This message originated outside the County of Albemarle email system. DO NOT CLICK on links or open attachments unless you are sure the content is safe. 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