ARCHIVED REPORTS_1988_4 - Laserfiche WebLink

Home Browse Search

I[] 91 J. H. KLEINFELDER & ASSOCIATES File: W-2022-1/11:312 June 19, 1986 Page 5 One of the areas where Lone Star Industries attempted to develop wells is just southwest of the existing city dump in the Corral Hollow wash, on the approximate border of the site. This was attempted in the 1940s and no sufficient quantities of ground water were encountered. They moved approximately two miles to the northeast and encountered sufficient quantities to supply their gravel pit operations. Today, an approximate 60 -foot deep domestic well is in use in the Corral Hollow alluvium which supplies the ranch located approximately one mile upstream from the dump. Two Lone Star Industries wells are producing approximately 1,250 to 1,300 gpm (gallons per minute) and are approximately 500 feet deep. The Granite Construction well is producing approximately 1,000 gpm and is approximately 400 feet deep. This well was developed in May 1981, and was run at full capacity for approximately three months with no noticeable reduction in capacity or drawdown of ground water. A farmers well located approximately 1/2 mile north of the site has been producing approximately 1,000 gpm from an 800 -foot well for irrigation purposes since 1956. Two wells developed in the Country Estates Subdivision each produce approximately 750 gpm and are approximately 800 feet deep. Information obtained from the Department of Water Resources, 1953 to 1971, generally indicates poor quality water with spotted good quality areas. The data indicate sulfate concentrations varying from 159 to 786 mg/L, chloride concentrations of 55 to 294 mg/L, and TDS (total dissolved solids) up to 1,775 mg/L. State standards allow for a maximum of 500 mg/L for sulfates or chlorides and a maximum of 1,000 mg/L for TDS in order for water to be considered potable. Our firm obtained water samples for a home in Country Estates Subdivision, the well at Granite Construction's gravel pit, and a farmer's well approximately 1/2 mile northeast of the site. Chemical tests indicate chloride concentrations of 102 mg/L, sulfate concentrations of 257 mg/L, and TDS of 810 mg/L at Granite's gravel pit; 126 mg/L of chlorides, 349 mg/L of sulfates, and 920 mg -/L TDS at the farmer's well; and 146 mg/L of chlorides, 817 mg/L of sulfates, and 1,670 mg/L TDS. As at Country Estates Subdivision. Plate VIII (Plate 3 of this report) of this report indicates the approximate locations of all the wells mentioned above. In addition, the approximate area of the best potential for well development is outlined.