Initially Prepared 2016 Brazos G Regional Water Plan | Volume 2 Aquifer Storage and Recovery (ASR) 10 Aquifer Storage and Recovery (ASR) Aquifer Storage and Recovery (ASR) is a water management strategy for water suppliers who periodically have surplus water and water shortages. For Brazos G, ASR is considered for: Seasonal operations by injecting and storing water in aquifers during the fall, winter, and spring when demands are low and recovering the water during the summer when demands are high. An example is optimizing the utilization of a water treatment plant by processing source water at a relatively constant rate throughout the year. This strategy may prevent or delay an expansion of water treatment plant or pipeline. Indirectly transfer water from one water utility to another. This indirect transfer can occur by injecting water in one part of the aquifer and recovering an equivalent amount of groundwater in another part of the aquifer. This transfer effectively increases the Modeled Available Groundwater (MAG) at a county level and is expected to allow an increase in pumping. This may especially be useful where the MAG is fully allocated, but there are relatively small water utilities on wells who do not have the means to develop an alternative water supply. Recharge a shallow aquifer with surface water from junior water rights and recover all or part of the water with wells at a later date. This approach is considered to be most applicable to the Brazos River Alluvium where surface water during moderately high flows can be diverted by gravity into recharge basins and later recovered by nearby wells. Storage and recovery of wastewater treated to potable drinking water standards. A list of conceptual ASR projects for Brazos G was prepared that considered: (1) water needs in local areas, (2) local or nearby aquifers that are suitable for aquifer storage and recovery projects, (3) supply of water, and (4) operational considerations. This study identified 16 ASR conceptual projects in six aquifers. This list is presented in Table 10-1). It was presented to the Brazos G Regional Planning Group for selection of potential ASR project for evaluation. From this list, three potential projects were selected, including: May 2015 | 10-1 Johnson County and Acton MUD: Use of water rights in Lake Granbury, Brazos River PUA advanced water treatment plant, and Trinity Aquifer by participants in and near Johnson County and Acton MUD; Waco and McLennan County: Use of City of Waco’s water rights and water treatment capacity for storage in the Trinity Aquifer and recovery by participants in and near McLennan County; College Station Wastewater: Use of wastewater from City of College Station’s two wastewater plants, advanced water treatment, and Simsboro Aquifer for seasonal storage by the City; and Initially Prepared 2016 Brazos G Regional Water Plan | Volume 2 Aquifer Storage and Recovery (ASR) Williamson County: Use of available water from Lake Granger, Eastern Williamson County Regional Water Treatment Plant, and Trinity Aquifer by BRA customers in eastern Williamson County participants. In addition, the City of Williamson County is considering an ASR project to fully utilize production from their existing well permits from the local groundwater conservation district. Table 10-1. List of Potential ASR Strategies Water Utility Source of Water Location Description of Strategy Seymour Abilene Fort Phantom Hill (FPH) Lake Jones County (NW of Fort Phantom Hill Lake Goal: Increase the firm yield of Fort Phantom Hill Lake Approach: Divert Lake water to a farm, recharge by surface infiltration, recovery the water with wells during drought conditions and return to the lake. Haskell and Knox Counties Double Mountain Fork-Brazos or Lake Stamford Haskell and /Knox Counties Goal: Utilize junior water rights to increase water supplies, especially during droughts. Approach: Divert river water during relatively high flows to a farm, recharge by surface infiltration, recovery the water with wells during drought conditions, treat, and transfer to municipalities with shortages. Trinity Acton MUD Brazos River PUA (Lake Granbury) Hood County Goal: Increase water supply and optimize seasonal operations, especially a desalination water treatment plant. Approach: Divert treated water to new ASR wells, inject into aquifer during low demands and recover water with ASR wells during high demand. Johnson Co SUD (Regional Provider) Brazos River PUA (Lake Granbury) Johnson County Goal: Increase water supply and optimize utilization of water treatment plant and transmission facilities. Approach: Divert treated water to new injection wells in Johnson County, inject into aquifer during low demands, and participating utilities recover the water with existing or new wells. Using an accounting process, the MAG for the Trinity Aquifer in Johnson County.is increased. City of Waco (Regional Provider) Lake Waco (City of Waco Water Treatment Plan) McLennan County Goal: Increase water supply and optimize utilization of water treatment plant, minimize construction of new transmission facilities. Approach: Divert treated water to new injection wells near Waco’s distribution system, inject into aquifer during low demands, and participating utilities recover water with existing wells. Using an accounting process, the MAG for the Trinity Aquifer in McLennan County.is increased. 10-2 | May 2015 Initially Prepared 2016 Brazos G Regional Water Plan | Volume 2 Aquifer Storage and Recovery (ASR) Table 10-1. List of Potential ASR Strategies Water Utility Source of Water Location Description of Strategy North Bosque WSC Lake Waco (City of Waco Water Treatment Plan) McLennan County Goal. Increase groundwater supply. Approach: Divert treated water to new ASR wells, inject into aquifer during low demands and recover water with ASR wells during high demand. BRA Customers (EWCWTP) Lake Granger (Water Treatment Plant) Eastern Williamson Co Goal: Increase firm yield of Lake Granger, optimize seasonal operations of Water Treatment Plant (WTP). Approach: Divert treated water to new ASR wells in Trinity Aquifer (Phase I) near Lake Granger, inject into aquifer during low demands and recover water with ASR wells during high demand and return the recovered water to the WTP for distribution to customers. Edwards (Balcones Fault Zone) BRA Customers (EWCWTP) Lake Granger (Treated) Eastern Williamson Co, near I-35 Goal: Increase water supply in Eastern Williamson County, optimize seasonal operations of Water Treatment Plant. Approach: Divert treated water to new ASR wells in Edwards (BFZ) Aquifer near I-35 and inject into aquifer during low demands and recover water with ASR wells during high demand, and deliver to participating utilities. Round Rock (Regional Provider) BRA (Lakes Belton, Stillhouse, and/or Georgetown) Vicinity of Round Rock Goal: Increase water supply and optimize utilization of water treatment plant, minimize construction of new transmission facilities. Approach: Divert treated water to new ASR wells, inject into aquifer during low demands, recover water with ASR wells during high demand, and deliver to participating utilities. Jarrel-Schwertner WSC BRA (Lakes Belton, Stillhouse, and/or Georgetown) NE Williamson County Goal: Increase water supply and optimize utilization of water treatment plant, minimize construction of new transmission facilities. Approach: Divert treated water to new ASR wells, inject into aquifer during low demands and recover water with ASR wells during high demand. Chisholm Train SUD BRA (Lakes Belton, Stillhouse, and/or Georgetown) NW Williamson County Goal: Increase water supply and optimize utilization of water treatment plant, minimize construction of new transmission facilities. Approach: Divert treated water to new ASR wells, inject into aquifer during low demands and recover water with ASR wells during high demand. Brazos River Alluvium BRA Downstream water rights Brazos River Brazos and Burleson Counties Carrizo-Wilcox May 2015 | 10-3 Goal: Increase water supply in lower basin during low-flow conditions. Approach: Channel or pump station diversion, surface infiltration in basins, recovery by wells, and discharge to Brazos River. Initially Prepared 2016 Brazos G Regional Water Plan | Volume 2 Aquifer Storage and Recovery (ASR) Table 10-1. List of Potential ASR Strategies Water Utility Source of Water Location Description of Strategy BRA Customers or Water Rights Little River Lake Alcoa Goal: Increase groundwater availability by increasing recharge. Approach: Divert junior water rights from Little River to Lake Alcoa at relatively high rates, gradually release the water from Lake Alcoa to streams for recharge through bed and banks. Recover the water with new or existing wells. BRA Customers/Water Rights Yegua Creek Lee County Goal: Increase groundwater availability by increasing recharge. Approach: Divert junior water rights from Yegua Creek to infiltration basins at relatively high rates for recharge. Recover the water with new or existing wells. College Station City of College Station College Station Goal: Reuse wastewater and increase water supply to College Station during times of high demand. Approach: Apply advanced treatment of wastewater to produce potable drinking water, inject the treated water into new ASR well in the vicinity of the wastewater and water treatment plants during periods of low demands, recover the water during high demands. Brazos River Alluvium and Carrizo-Wilcox Bryan 10-4 | Brazos River May 2015 Robertson County (btw Hwys 79 and 21) and in vicinity of Bryan’s well field Goal: Increase water supply to Bryan. Approach: Channel or pump station diversion, surface infiltration in basins, recovery by wells, and discharge to water treatment plant, inject in new ASR wells in the Simsboro, and recovery the water using the ASR wells during high demand conditions.
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