Paregien Basin Project

The District plans to develop an approximately 50-acre recharge facility known as the Paregien Basin located directly south of Highway 198, northeast of the City of Farmersville. The new groundwater basin would include a new turnout connection from Deep Creek. The Project would also include approximately 350 feet of pipeline connecting the new turnout to the proposed basin. The pipeline connection from the proposed recharge basin to Deep Creek will be located on the south side of the existing West Pond, which is not a part of the Project. The area to the north and east of the existing pond will be avoided as it has been identified as a potentially sensitive habitat area. No Project activities will occur in this area. The proposed turnout would be developed with a capacity for approximately 20 cubic feet per second (CFS). The proposed turnout facility would consist of cast-in-place concrete structure, control gate(s), trash rack, and related appurtenances from the west bank of Deep Creek to divert to the proposed basin. The turnout structure would connect to an inlet pipeline approximately 350 linear feet (LF) from Deep Creek into the proposed Paregien Basin. The turnout structure would have a maximum excavation depth of 15 feet below ground surface for establishing proper compaction under the structure and pipeline. All excavation material would be balanced on site. Construction would include equipment mobilization, excavation of earthwork for the recharge basin and construction of basin perimeter berms. The Project site would contain temporary staging areas for construction equipment and material storage during the construction effort. Basin construction would include performance testing (i.e. compaction testing) and demobilization. Excavation material would be used on site for berm construction along the perimeter of the basin. New berm construction would not exceed six feet in height, measured from the exterior toe to the top of new berm. The maximum depth of ground disturbance for the basin would be as much as nine (9) feet. Through the improvements of this proposed multi-cell recharge basin, it is anticipated to recharge approximately 1,260 acre-feet (AF) on an average annual basis. However, the site is capable of recharging more in wet years when surplus water is available for longer durations. The 1,260 AF estimate is derived based on an estimated recharge rate of 0.5 AF per acre across the approximately 50 acres of wetted area for an estimated duration of 50 days, which is an approximate average of historical water availability on the Kaweah system. Typical surplus surface water availability is generally between March and June. However, in very wet years, water could be diverted for recharge whenever excess supply is available, which could occur from January to September or October.