HHUA I and HHUA II
The Board of Directors of the Hill Country Underground Water Conservation District on August 8, 2006 designated two areas, HHUA I and HHUA II, within Gillespie County as High Historical Groundwater Use Areas and the associated Buffer zone. This action followed a public hearing held on July 5, 2006.
The new restrictions in a HHUA affects new permitted wells that would be used for municipal, irrigation or commercial purposes, and not existing permitted wells or existing wells used for domestic or livestock purposes. New wells used solely for domestic or livestock purposes are not affected in a HHUA.
The High Historical Groundwater Use designation places more restrictive pumpage conditions on new permitted wells and requests for increased production on existing permitted wells, which includes grandfathered permitted wells. It also doubles the well spacing requirements on new permitted wells. In the Buffer Zone, the more restrictive pumpage conditions do not apply, however the doubled well spacing requirement for new permitted wells is required. These new requirements are applicable only to permitted wells and do not pertain to domestic or livestock wells.
This designation is meant to protect existing historic pumpage and to alleviate the possibility of taking the next more restrictive designation of a Critical Groundwater Depletion Area. A Critical Groundwater Depletion Area designation is made if aquifer mining occurs within an aquifer. Aquifer mining occurs when more water is being pumped than what is being recharged. If that designation is made, then all permitted wells will be required to limit production to a level that will terminate aquifer depletion.
Under the current High Historical Groundwater Use designation all current historic production is protected.
HHUA I is
located over the Ellenburger aquifer, southeast of Fredericksburg where large
drawdowns have occurred in the past.
There, the City of
HHUA II is
north of Fredericksburg where the City has municipal historic pumpage dating back to the 1960s. This area covers a portion of the new Boot
Ranch Development. There, recent test
drilling and subsequent pump test data, has delineated
a narrow restricted portion of the