Records of wells, drillers' logs, water-level measurements, and chemical analyses of ground water in Brazoria, Fort Bend, and Waller counties, Texas, 1980-84

Abstract

Information on major new water wells in B razor! a, Fort Bend, and WallerCounties was compiled by the U.S. Geological Survey from 1980 through 1984.This report presents the results of the hydro!ogic data collection on new largecapacity and other selected wells, including well location and completion data, drillers' logs of the strata penetrated, water levels, and chemical quality of the produced water. These water-well data are supplementary to similar data on older wells in these counties and descriptive evaluations of the ground-water resources which have been published previously. « an inventory of new large-capacity and other selected wells, water-level measurements in observation wells, and a compilation of information on landsurface subsidence.The hydro!ogic data are published every 5 years. The first report (Naftel, Fleming, and Vaught, 1976) presents data collected from 1966 through 1974.The second report (Ratzlaff, Ranzau, and Lind, 1983) presents data collected from 1975 through 1979. This report presents records of wells, drillers' logs, water-level measurements, and chemical analyses of ground water collected during 1980-84 (tables 1-12). The records of wells and drillers' logs are for wells completed during 1980-84, but the water-level measurements and chemical analyses are new data on the newly drilled wells or additional data (1980-84) on previously published wells. All the wells listed in tables 1-12 are shown in figures 1-3. Additional information on the geology and hydrology of the area may be found in publications listed in "Selected References." Most of the chemical analyses presented in this report were determined in the laboratories of the U.S. Geological Survey, but some data were obtained from commercial analyses. Dissolved solids (sum of constituents) and hardness (Ca, Mg) were recalculated to correspond to the Geological Survey reporting methods.-2- WELL-NUMBERING SYSTEMThe well-numbering system used in this report was devised by the Texas Department of Water Resources for use throughout the State. Under this system, each 1-degree quadrangle is given a number consisting of two digits. These are the first two digits in the well number. Each 1-degree quadrangle is divided into 7-1/2-minute quadrangles which are given two-digit numbers from 01 to 64.These are the third and fourth digits of the well number. Each 7-1/2-minute quadrangle is divided into 2-1/2-minute quadrangles which are given a singledigit number from 1 to 9. This is the fifth digit of the well number. Finally, each well within a 2-1/2-minute quadrangle is given a two-digit number in the order in which it was inventoried, starting with 01. These are the last two digits of the well number.On the well-location maps (figs. 1-3), only the last three digits of the well number are shown at each well location; the second two digits are shown in the northwest corner of each 7-1/2-minute quadrangle; and the first two digits are shown by the large block numerals 59, 60, 65, 66, and 81.