Michaela R. Johnson Jason K. Ramage Mark C. Kasmarek 2016 vector digital data Mark C. Kasmarek Jason K. Ramage Michaela R. Johnson 2017 Scientific Investigations Map 3365 Houston, Texas U.S. Geological Survey http://pubs.usgs.gov/sim/3365/ (U.S. Geological Survey Scientific Investigations Map 3365): The U.S. Geological Survey in cooperation with the Harris-Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, Lone Star Groundwater Conservation District, and Brazoria County Groundwater Conservation District has produced this report as one in an annual series of reports that depicts water-level altitudes and water-level changes in the Chicot, Evangeline, and Jasper aquifers, and compaction in the Chicot and Evangeline aquifers in the Houston-Galveston region, Texas. The report contains 16 sheets and 15 tables: 3 sheets are maps showing current-year (2016) water-level altitudes for each aquifer, respectively; 3 sheets are maps showing 1-year (2015-16) water-level changes for each aquifer, respectively; 3 sheets are maps showing 5-year (2011-16) water-level changes for each aquifer, respectively; 4 sheets are maps showing long-term (1990-2016 and 1977-2016) water-level changes for the Chicot and Evangeline aquifers, respectively; 1 sheet is a map showing long-term (2000-16) water-level change for the Jasper aquifer; 1 sheet is a map showing site locations of the 13 borehole extensometers; and 1 sheet comprises line graphs showing measured cumulative compaction of subsurface material at the extensometers from 1973, or later, through 2015. The 2016 water-level measurements and resultant datasets presented in this report are built upon and archived in the National Water Information System: Web Interface, groundwater information, field measurements site located here: http://nwis.waterdata.usgs.gov/usa/nwis/gwlevels (U.S. Geological Survey, 2016). This site is a publicly available, searchable, online database of water information. These datasets have been updated as of March 2017 to correct errors revealed in the previous version published in 2016. The revisions to these datasets have been reviewed per U.S. Geological Survey standards. These datasets were created by the U.S. Geological Survey in cooperation with the Harris-Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, Lone Star Groundwater Conservation District, and the Brazoria County Groundwater Conservation District to provide resource managers, public officials, researchers, and the general public with ready access to accurate, impartial, unbiased, scientific information regarding water-level altitudes and water-level changes in Harris, Fort Bend, Montgomery, and Brazoria Counties, and surrounding counties, Texas. These datasets were developed using a geographic information system (GIS). The GIS software that was used to develop these datasets was Environmental Systems Research Institute (ESRI, Inc.) ArcDesktop 10.2 and ArcInfo Workstation 9.3. These data are separated into three feature datasets (three directories for shapefiles) by aquifer (Chicot, Evangeline, and Jasper) that contain the individual feature classes (shapefiles). Chicot aquifer - (feature dataset name/shapefile directory name) Feature classes/shapefiles: ch16pt - point values of water-level altitudes, 2016 ch16arc - contours of approximate water-level altitudes, 2016 ch1516pt - point values of water-level changes, 2015-16 ch1116pt - point values of water-level changes, 2011-16 ch1116arc - contours of water-level changes, 2011-16 ch9016pt - point values of water-level changes, 1990-2016 ch9016arc - contours of water-level changes, 1990-2016 ch7716pt - point values of water-level changes, 1977-2016 ch7716arc - contours of water-level changes, 1977-2016 Evangeline aquifer - (feature dataset name/shapefile directory name) Feature classes/shapefiles: ev16pt - point values of water-level altitudes, 2016 ev16arc - contours of approximate water-level altitudes, 2016 ev1516pt - point values of water-level changes, 2015-16 ev1116pt - point values of water-level changes, 2011-16 ev1116arc - contours of water-level changes, 2011-16 ev9016pt - point values of water-level changes, 1990-2016 ev9016arc - contours of water-level changes, 1990-2016 ev7716pt - point values of water-level changes, 1977-2016 ev7716arc - contours of water-level changes, 1977-2016 Jasper aquifer - (feature dataset name/shapefile directory name) Feature classes/shapefiles: ja16pt - point values of water-level altitudes, 2016 ja16arc - contours of approximate water-level altitudes, 2016 ja1516pt - point values of water-level changes, 2015-16 ja1116pt - point values of water-level changes, 2011-16 ja1116arc - contours of water-level changes, 2011-16 ja0016pt - point values of water-level changes, 2000-16 ja0016arc - contours of water-level changes, 2000-16 1977 1990 2000 2011 2015 2016 ground condition Complete Annually -96.042013 -94.851762 30.333428 28.915310 ISO 19115 Topic Category elevation geoscientificInformation imageryBaseMapsEarthCover None subsidence land-surface subsidence compaction elevation land-surface elevation hypsometry groundwater water-level altitude water-level change Chicot aquifer Evangeline aquifer Jasper aquifer Geographic Names Information System (GNIS) Harris County, Texas Texas Brazoria County, Texas Chambers County, Texas Fort Bend County, Texas Galveston County, Texas Baytown, Texas Clear Lake, Texas East End, Texas Addicks, Texas Texas City, Texas Seabrook, Texas Johnson Space Center Pasadena, Texas Lake Houston Grimes County, Texas Houston, Texas Brownwood, Texas Liberty County, Texas Montgomery County, Texas San Jacinto County, Texas Walker County, Texas Waller County, Texas None. The water-level-measurement data was accurate at the time it was collected. However, users should be aware that the water levels in wells probably have changed since the water-level measurement was taken and subsequently published; therefore some parts of this dataset may no longer be current and applicable. This dataset should not be used to extract precise values, but instead should be used to examine regional patterns. Users should not use these data for critical applications without a full awareness and understanding of the limitations of these data. Any user who modifies these data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent these data, nor to imply that changes made were approved by or endorsed by the U.S. Geological Survey. Please refer to https://www2.usgs.gov/fsp/fsp_disclaimers.asp; for the U.S. Geological Survey disclaimer. Public Information Officer U.S. Geological Survey mailing and physical address

1505 Ferguson Lane

Austin TX 78754 USA 512-927-3500 512-927-3590 gs-w-txpublicinfo@usgs.gov Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. None. Unclassified There are no security requirements for handling these datasets. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000 All feature attribute values were peer reviewed. Values were checked and verified for the correct data type and for the presence or absence of these data. All water-level-altitude or water-level-change point data are within the contour interval defined by the upper and lower altitude contour or change contour values of the adjacent bounding contours. These datasets include the point source data and contours depicting the water-level-altitude and water-level-change map sheets for the Chicot, Evangeline, and Jasper aquifers within an 11-county area surrounding and including Harris County and Houston, Texas. Horizontal positional accuracy of these point data is dependent on the source data used to define the geographic location of the well (digital orthophotograph, GPS, survey, etc.). Data such as the source data type, land-surface-elevation data, water-level-measurement data, accuracy of water-level measurment, date of water-level measurement, accuracy associated with the location of the well, and other qualifying information are uploaded and archived in the Groundwater Site-Inventory System (GWSI) (U.S. Geological Survey, 2016) of the U.S. Geological Survey National Water Information System (NWIS)(U.S. Geological Survey, 2016) of the U.S. Geological Survey National Water Information System (NWIS-5.2.0-27, 2016) accessed here, http://waterdata.usgs.gov/tx/nwis. Horizontal accuracy of the contour data varies and is greater for contours located proximal to dense concentrations of wells and decreases for contours between sparsely distributed wells. Data are the best available at the time the well's position was determined. Vertical positional accuracy of the point data is dependent on the source data used to define the location of the well that is primarily 3D Elevation Program (3DEP)or U.S. Geological Survey 7.5-minute topographic quadrangle, digital-elevation model (DEM), GPS, survey, etc., and the method (calibrated steel tape, air line, and electric water-level tape, or data reported by well operators) and accuracy of the measurement (0.01, 0.1 or to the nearest foot) of the depth to water in wells screened in the aquifer. Data such as the source data type, land-surface-elevation data, water-level measurement data, accuracy of water-level measurement, date of water-level measurement, accuracy associated with the location of the well, and other qualifying information are uploaded and archived in the Groundwater Site-Inventory System (GWSI) (U.S. Geological Survey, 1998) of the U.S. Geological Survey National Water Information System (U.S. Geological Survey, 2002) accessed here, http://waterdata.usgs.gov/tx/nwis. The accuracy of the contoured data is enhanced in areas that have water-level-measurement data from a greater concentration of wells and decreases in distal areas that have water-level-measurement data from a sparse concentration of wells. U.S. Geological Survey 1998 none http://pubs.usgs.gov/fs/FS-027-98/ Fact Sheet 027-98 Reston, Virginia U.S. Geological Survey reference 1998 publication date GWSI Description of storage database for site information and water-level measurements. U.S. Geological Survey 2002 none http://pubs.usgs.gov/fs/FS-148-02/ Fact Sheet 128-02 Reston, Virginia U.S. Geological Survey reference 2002 publication date NWIS Description of the public storage NWIS database for water data, including site information and water-level measurements. Gabrysch, R.K. 1979 map Open-File Report 79-334 Houston, Texas U.S. Geological Survey paper map 1977 ground condition 1977 Water-level altitudes for the Chicot and Evangeline aquifers, 1977. Barbie, D.L. Coplin, L.S. Locke, G.L. 1991 map Open-File Report 91-240 Houston, Texas U.S. Geological Survey paper map 1990 ground condition 1990 HG Water-level altitudes for the Chicot and Evangeline aquifers in the Houston area, 1990. Kasmarek, M.C. 1997 map Open-File Report 97-784 Houston, Texas U.S. Geological Survey paper map 1990 ground condition 1990 FB Water-level altitudes for the Chicot and Evangeline aquifers in Fort Bend County and adjacent areas, 1990. Kasmarek, M.C. Houston, N.A. 2007 map Scientific Investigations Map 2968 Houston, Texas U.S. Geological Survey paper map 2000 ground condition 2000 Water-level altitudes for the Jasper aquifer in the Houston area, 2000. Johnson, M.R. Ramage, J.K. Kasmarek, M.C. 2010 map Scientific Investigations Map 3174 Houston, Texas U.S. Geological Survey paper map 2011 ground condition 2011 Water-level altitudes for the Chicot, Evangeline, and Jasper aquifers, 2011. Kasmarek, M.C. Johnson, M.R. Ramage, J.K. Houston, N.A. Schmidt, T.S. 2015 map Scientific Investigations Map 3337 Houston, Texas U.S. Geological Survey paper map 2015 ground condition 2016 Water-level altitudes for the Chicot, Evangeline, and Jasper aquifers, 2016. Water-level-measurement data were obtained by calibrated steel tape, air line, electric water-level tape, and from reported data by company well operators or owners. These data were then imported into a geographic information system (GIS) using approved and standard procedures to create the numerous depictions. Water-level altitude and water-level change data are depicted on the map sheets by contours of equal water-level altitude with intervals that vary from 50 or 100 feet; and water-level change with intervals that vary from 10, 20, or 40 feet. 2016 For the 1-year (2015-16) water-level-change map sheets, water-level changes were computed as the difference in depth to water at each point (well) for which a water-level measurement was made in 2015 and 2016. Change on the 1-year map sheets is depicted by point differences. For the 5-year (2011-16) water-level-change-map sheets, water-level changes were computed the same as for the 1-year map sheets; the difference in water-level altitude at each point for which a water-level measurement was made in 2011 and 2016.Water-level-changes on the 5-year map sheets is depicted by contours of equal-water-level change. Each 5-year water-level-change map was created by contouring the set of mapped-point differences. For the historical (2000-16, 1990-2016, 1977-2016) water-level-change map sheets, water-level-change values were computed as the difference in water-level altitude at each point (well) for which a water-level measurement was made in 2016 and the water-level altitude at that point on a gridded surface of the historical water-level-altitude map. Historical water-level-change-map sheets are depcited by contours of equal water-level change. Each historical water-level-change map was created by contouring the set of mapped point differences. 2016 For the Chicot aquifer map sheet depictions, 178 water-level measurements were used to construct the 2016 water-level altitude, 163 water-level pairs were used to construct the 2015-16 water-level change, 142 water-level pairs were used to construct the 2011-16 water-level change, 140 water-level pairs were used to construct the 1990-2016 water-level change, and 128 water-level pairs were used to construct the 1977-2016 water-level change. For the Evangeline aquifer map sheet depictions, 320 water-level measurements were used to construct the 2016 water-level altitude, 307 water-level pairs were used to construct the 2015-16 water-level change, 259 water-level pairs were used to construct the 2011-16 water-level change, 247 water-level pairs were used to construct the 1990-2016 water-level change, and 239 water-level pairs were used to construct the 1977-2016 water-level change. For the Jasper aquifer map sheet depictions, 109 water-level measurements were used were used to construct the 2016 water-level altitude, 95 water-level pairs were used were used to construct the 2015-16 water-level change, 89 water-level pairs were used to construct the 2011-16 water-level change, and 90 water-level pairs were used to construct the 2000-16 water-level change. 2016 WATER-LEVEL ALTITUDE Database retrieval from NWIS GWSI of water-level measurements to comma-delimited text file. ARCMAP - addxy and export - generate shapefiles of 2016 water-level measurements, in feet below land surface, for each aquifer. Generate GIS point coverage of water-level measurements by aquifer (ch, ev, and ja) from text file. Export native geographic NAD83 point features using the data frame properties (set to UTM, Zone 15, and NAD 83). ch16pt.shp ev16pt.shp ja16pt.shp ARC - Convert shapefile to coverages (shapearc): ch16pt ev16pt ja16pt ARC/TABLES MODULE OR ARCMAP Calculate 2016 water-level altitude in feet referenced to North American Vertical Datum 1988 (NAVD 88) for each aquifer (ch, ev, and ja). [wlalt16 = Land surface elevation - depth to water below land-surface datum] Water-level altitudes for 1977, 1990, 2000, 2011, and 2015 have already been calculated by this method and were published in the reports listed in the preceding 'Source_Information' section. These data will be used in the section describing the water-level-change datasets. ARC Generate surface (ESRI grid) of water-level altitude from water-level altitude using command, topogridtool. [topogridtool ch16gridgo 90] These options were used in the tool configuration: drainage enforcement off, datatype: point, point cover: ch16pt point coverage attribute: wlalt16 datatype: mask polygon mask cover: ch16arcmask. The grid, xx16gridgo, was created using GIS point features from the cover, xx16pt, and a polygon coverage, xx16arcmask (xx represents ch, ev, and ja). The water-level-altitude data (wlalt16) used to create the interopolated surface are an attribute in the cover: xx16alt, and the grid extent was constrained to the boundary defined in the polygon coverage, ch16arcmask. ARC/GRID MODULE Generate contours of 2016 water-level altitude from water-level grid, ch16gridgo. [ch16arcck = contour(ch16gridgo, interval, 50, 0)] In commandline grid, creates 50-foot contours from the grid, ch16gridgo, and creates a new arc cover, ch16arcck. This coverage is only used as a background reference to aid in modifying/reshaping the water-level-altitude contours presented in the 2015 Scientific Investigations Map (SIM) report. ARC Copy the 2015 water-level-altitude contours to new 2016 water-level-altitude contours using command, copy xx15arc to xx16arc. ARCEDIT MODULE Reshape these contours where needed to follow the changes in water-level altitudes of 2015-16. Using the arc coverage from the previous year thus allowing and maintaining the historical algorithms and patterns while having updated 2016 water-level-altitude data. These depictions are reviewed by the coauthors with suggestions for required revisions. This iterative process continues until the best representation is achieved of the regional altitude depiction for 2016. 2016 Join point attribute data of water-level altitudes from previously published reports to point coverage for the same wells measured again in 2016 for each aquifer. [joinitem xx16pt.pat xx77pt.pat xx16pt.pat station_nm] (Chicot and Evangeline aqufers only) (provides wlalt77) [joinitem xx16pt.pat xx90pt.pat xx16pt.pat station_nm] (Chicot and Evangeline aquifers only) (provides wlalt90) [joinitem xx16pt.pat xx00pt.pat xx16pt.pat station_nm] (Jasper only) (provides wlalt00) [joinitem xx16pt.pat xx11pt.pat xx16pt.pat station_nm] (provides wlalt11) [joinitem xx16pt.pat xx77pt.pat xx16pt.pat station_nm] (provides wlalt16) Water-level change, 1-year for each aquifer (ch, ev, and ja) ARC COMMANDS Copy to new cover. [copy xx16pt xx1516pt] Add new attribute for water-level change of 2015-16, "diff1516". [additem xx1516pt.pat xx1516pt.pat diff1516 6 6 n 2] Open up the Tables module of Arc, select the attribute table of the GIS coverage of interest. [tables;sel xx1516pt.pat] Calculate the new attribute, and quit Tables back to Arc. [calc diff1516 = lev_va15 - lev_va16;q] 2016 Water-level change, 5-year for each aquifer (ch, ev, and ja) [copy xx16pt to xx1116pt] Add attribute diff1116. [additem xx1116pt.pat xx1116pt.pat diff1116 6 6 N 2] [tables;sel xx1116pt.pat] [calc diff1116 = wlalt11 - wlalt16;q] Generate surface of 2011-16 water-level change from point value of 5-yr water-level change (xx = ch, ev, and ja). [topogridtool xx1116gridgo 90] with settings (enforce off;datatype point;point xx1116pt diff1116;datatype mask ch1116arcmask;end). Generate contours of 2011-16 water-level change from grid, xx1116gridgo. [grid;xx1116arcck = contour(xx1116gridgo, interval, 10, 0);q] 2016 Water-level change, 1990-2016 year for each aquifer (ch or ev). [copy xx16pt to xx9016pt] add attribute diff9016. [tables;sel xx9016pt.pat] [calc diff9016 = wlalt90 - wlalt16;q] If no well measurement was made in 1990, the value from the 1990 water-level-altitude grid will be assigned to the point in the attribute, wlalt90gd. For only those wells with no measurements in 1990: [diff9016 = wlalt90gd - wlalt16] Generate surface of water-level change from point value of 1990-2016 water-level-change (xx = ch and ev). [topogridtool xx9016gridgo 90] with settings (enforce off;datatype point;point xx9016pt diff9016;datatype mask xx9016arcmask;end). Generate contours of 1990-2016 water-level change from grid, xx9016gridgo. [grid;xx9016arcck = contour(xx9016gridgo, interval, 40, 0);q] 2016 Water-level change, 1977 to 2016 year for each aquifer (ch or ev). copy xx16pt to xx7716pt. add attribute diff7716. [tables;sel xx7716pt.pat] [calc diff7716 = wlalt77 - wlalt16;q] If no well measurement was made in 1977, the value from the 1977 water-level-altitude grid will be assigned to the point in the attribute, wlalt77gd. For only those wells with no measurements in 1977: [diff7716 = wlalt77gd - wlalt16] Generate surface of water-level change from point value of 1977-2016 water-level change (xx = ch or ev). [topogridtool xx7716gridgo 90] with settings (enforce off;datatype point;point xx7716pt diff7716;datatype mask xx7716arcmask;end). Generate contours of 1977-2016 water-level change from grid, xx7716gridgo. [grid;xx7716arcck = contour(xx7716gridgo, interval, 40, 0);q] 2016 Water-level change, 2000-16 for the Jasper aquifer. copy xx16pt to diff0016pt. add attribute diff0016. [tables;sel xx0016pt.pat] [calc diff0016 = wlalt00 - wlalt16;q] If no well measurement was made in 2000, the value from the 2000 water-level-altitude grid will be assigned to the point in the attribute, wlalt00gd. For only those wells with no measurements in 2000: [diff0016 = wlalt00gd - wlalt16] Generate surface of water-level change from point value of 2000-16 water-level-change. [topogridtool ja0016gridgo 90] with settings (enforce off;datatype point;point ja9016pt diff0016;datatype mask ja0016arcmask;end). Generate contours of 2000-16 water-level change from grid, ja0016gridgo. [grid;ja0016arcck = contour(JA0016gridgo, interval, 20, 0);q] 2016 Contours were modified (smoothed and reshaped) following the creation of each water-level-change-contour dataset. Data points of water-level altitude or water-level change were removed when they did not conform to the surrounding regional depiction, and appropriate modifications to adjacent contours were made. Contour lines were modified and correctly positioned relative to the controlling point values to accurately represent the regional depiction of the water-level data in the aquifers. 2016 Datasets were imported to a personal geodatabase. 2016 Vector String 78 Universal Transverse Mercator 15 0.999600 -93.000000 0.000000 500000.000000 0.000000 coordinate pair 0.0001 0.0001 meters North American Datum of 1983 Spheroid 6378206.4 294.978698 North American Vertical Datum of 1988 1 feet Attribute values Local surface 1 feet Attribute values ch1116arc Chicot aquifer water-level changes, 2011-16. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. CONTOUR Change in water-level altitude, 2011-16. U.S. Geological Survey -30 20 feet 1 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ch1116pt Chicot aquifer point values of water-level changes, 2011-16. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. wlalt16 2016 Water-level altitude referenced to North American Vertical Datum of 1988 (NAVD 88). U.S. Geological Survey -221 241 feet 1 wlalt11 2011 Water-level altitude referenced to North American Vertical Datum of 1988 (NAVD 88). U.S. Geological Survey -215 222 feet 1 diff1116 Change in water-level altitude, 2011-16. U.S. Geological Survey -37 26 feet 1 ch1516pt Chicot aquifer point values of water-level changes, 2015-16. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. lev_va16 2016 Depth to water in well. U.S. Geological Survey 10.62 321 feet 1 lev_va15 2015 Depth to water in well. U.S. Geological Survey 11.71 299 feet 1 diff1516 Change in water-level altitude, 2015-16. U.S. Geological Survey -39 26 feet 1 ch15arc Chicot aquifer approximate water-level altitude, 2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. CONTOUR 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -200 200 feet 1 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ch16pt Chicot aquifer water-level altitudes, 2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. wlalt16 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -221 241 feet 1 INDEX Index value used to identify wells screened in the Chicot aquifer presented in Appendix1.1 of Scientific Investigations Map 3365. U.S. Geological Survey Unique identifier. ch7716arc Chicot aquifer water-level changes, 1977-2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. CONTOUR Change in water-level altitude, 1977-2016. U.S. Geological Survey -120 200 feet 1 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ch7716pt Chicot aquifer point values of water-level changes, 1977-2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. wlalt16 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -221 172 feet 1 wlalt77 1977 Water-level altitude referenced to NAVD 88; -9999 represents null value. U.S. Geological Survey -290 174 feet 1 wlalt77gd 1977 Water-level altitude extracted from 1977 water-level-altitude grid referenced to NAVD 88. U.S. Geological Survey -260 174 feet 1 diff7716 Change in water-level altitude, 1977-2016. U.S. Geological Survey -122 202 feet 1 ch9016arc Chicot aquifer water-level changes, 1990-2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. CONTOUR Change in water-level altitude, 1990-2016. U.S. Geological Survey -140 160 feet 1 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ch9016pt Chicot aquifer point values of water-level changes, 1990-2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. wlalt16 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -221 172 feet 1 wlalt90 1990 Water-level altitude referenced to NAVD 88; -9999 represents null value. U.S. Geological Survey -314 174 feet 1 wlalt90gd 1990 Water-level altitude extracted from 1990 water-level-altitude grid referenced to NAVD 88; -9999 represents null value. U.S. Geological Survey -201 125 feet 1 diff9016 Change in water-level altitude, 1990-2016. U.S. Geological Survey -143 173 feet 1 ev1116arc Evangeline aquifer water-level changes, 2011-16. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. CONTOUR Change in water-level altitude, 2011-16. U.S. Geological Survey -60 40 feet 1 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ev1116pt Evangeline aquifer point values of water-level changes, 2011-16. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. wlalt16 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -281 240 feet 1 wlalt11 2011 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -320 237 feet 1 diff1116 Change in water-level altitude, 2011-16. U.S. Geological Survey -75 51 feet 1 ev1516pt Evangeline aquifer point values of water-level changes, 2015-16. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. lev_va15 2015 depth to water in well. U.S. Geological Survey -1.15 424.5 feet 1 lev_va16 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey 6.49 420.48 feet 1 diff1516 Change in water-level altitude, 2015-16. U.S. Geological Survey -65 61 feet 1 ev16arc Evangeline aquifer approximate water-level altitude, 2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. CONTOUR 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -250 200 feet 1 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ev16pt Evangeline aquifer water-level altitudes, 2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. wlalt16 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -281 240 feet 1 INDEX Index value used to identify wells screened in the Evangeline aquifer presented in Appendix1.2 of Scientific Investigations Map 3365. U.S. Geological Survey Unique identifier. ev7716arc Evangeline aquifer water-level changes, 1977-2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. CONTOUR Change in water-level altitude 1977-2016. U.S. Geological Survey -320 240 feet 1 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ev7716pt Evangeline aquifer point values of water-level changes, 1977-2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. wlalt16 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -281 165 feet 1 wlalt77 1977 Water-level altitude referenced to NAVD 88; -9999 represents null value. U.S. Geological Survey -391 101 feet 1 wlalt77gd 1977 Water-level altitude extracted from 1977 water-level-altitude grid referenced to NAVD 88. U.S. Geological Survey -366 165 feet 1 diff7716 Change in water-level altitude, 1977-2016. U.S. Geological Survey -338 261 feet 1 ev9016arc Evangeline aquifer water-level changes, 1990-2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. CONTOUR Change in water-level altitude, 1990-2016. U.S. Geological Survey -160 160 feet 1 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ev9016pt Evangeline aquifer point values of water-level changes, 1990-2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. wlalt16 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -281 165 feet 1 wlalt90 1990 Water-level altitude referenced to NAVD 88; -9999 represents null value. U.S. Geological Survey -393 146 feet 1 wlalt90gd 1990 Water-level altitude extracted from 1990 water-level-altitude grid referenced to NAVD 88. U.S. Geological Survey -343 117 feet 1 diff9016 Change in water-level altitude, 1990-2016. U.S. Geological Survey -188 184 feet 1 ja0016arc Jasper aquifer water-level changes, 2000-16. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. CONTOUR Jasper Change in water-level altitude, 2000-16. U.S. Geological Survey -220 -20 feet 1 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ja0016pt Jasper aquifer point values of water-level changes, 2000-16. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. wlalt16 Jasper 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -242 253 feet 1 wlalt00 2000 Water-level altitude referenced to NAVD 88; -9999 represents null value. U.S. Geological Survey -102 275 feet 1 wlalt00gd 2000 Water-level altitude extracted from 2000 water-level-altitude grid referenced to NAVD 88. U.S. Geological Survey -56 203 feet 1 diff0016 Change in water-level altitude, 2000-16. U.S. Geological Survey -225 -2 feet 1 ja1116arc Jasper aquifer water-level changes, 2011-16. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. CONTOUR Change in water-level altitude, 2011-16. U.S. Geological Survey -60 50 feet 1 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ja1116pt Jasper aquifer point values of water-level changes, 2011-16. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. wlalt16 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -242 253 feet 1 wlalt11 2011 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -209 262 feet 1 diff1116 Jasper Change in water-level altitude, 2011-16. U.S. Geological Survey -65 50 feet 1 ja1516pt Jasper aquifer point values of water-level changes, 2015-16. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. lev_va16 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey 41.93 421.74253 feet 1 lev_va15 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey 45.38 413.08 feet 1 diff1516 Change in water level, 2015-16. U.S. Geological Survey -38 51 feet 1 ja16arc Jasper aquifer approximate water-level altitude, 2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. CONTOUR 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -200 250 feet 1 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ja16pt Jasper aquifer water-level altitudes, 2016. U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SITE_NO U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. U.S. Geological Survey Unique identifier. STATION_NM Name of well defined by county identifier and state well number. U.S. Geological Survey Unique identifier. wlalt16 2016 Water-level altitude referenced to NAVD 88. U.S. Geological Survey -242 253 feet 1 INDEX Index value used to identify wells screened in the Jasper aquifer presented in Appendix1.3 of Scientific Investigations Map 3365. U.S. Geological Survey Unique identifier. Water-level altitude and water-level change point and arc datasets. Chicot aquifer: ch16pt - point values of water-level altitudes, 2016 ch16arc - contours of approximate water-level altitudes, 2016 ch1516pt - point values of water-level changes, 2015-16 (depth to water below land-surface datum) ch1116pt - point values of water-level changes, 2011-16 ch1116arc - contours of approximate water-level changes, 2011-16 ch9016pt - point values of water-level changes, 1990-2016 ch9016arc - contours of approximate water-level changes, 1990-2016 ch7716pt - point values of water-level changes, 1977-2016 ch7716arc - contours of approximate water-level changes, 1977-2016 Evangeline aquifer: ev16pt - point values of water-level altitudes, 2016 ev16arc - contours of approximate water-level altitudes, 2016 ev1516pt - point values of water-level changes, 2015-16 (depth to water below land-surface datum) ev1116pt - point values of water-level changes, 2011-16 ev1116arc - contours of approximate water-level changes, 2011-16 ev9016pt - point values of water-level changes, 1990-2016 ev9016arc - contours of approximate water-level changes, 1990-2016 ev7716pt - point values of water-level changes, 1977-2016 ev7716arc - contours of approximate water-level changes, 1977-2016 Jasper aquifer: ja16pt - point values of water-level altitudes, 2016 ja16arc - contours of approximate water-level altitudes, 2016 ja1516pt - point values of water-level changes, 2015-16 (depth to water below land-surface datum) ja1116pt - point values of water-level changes, 2011-16 ja1116arc - contours of approximate water-level changes, 2011-16 ja0016pt - point values of water-level changes, 2000-16 ja0016arc - contours of approximate water-level changes, 2000-16 wlalt16 - 2016 Water-level altitude in feet referenced to NAVD 88 wlalt15 - 2015 Water-level altitude in feet referenced to NAVD 88 wlalt11 - 2011 Water-level altitude in feet referenced to NAVD 88 wlalt00 - 2000 Water-level altitude in feet referenced to NAVD 88; -9999 represents null value wlalt90 - 1990 Water-level altitude in feet referenced to NAVD 88; -9999 represents null value wlalt90gd - 1990 Water-level altitude extracted from 1990 water-level-altitude grid in feet referenced to NAVD 88; -9999 represents null value wlalt77 - 1977 Water-level altitude in feet referenced to NAVD 88; -9999 represents null value wlalt77gd - 1977 Water-level altitude extracted from 1977 water-level-altitude grid in feet referenced to NAVD 88; -9999 represents null value diff1516 - Change in water level in feet, 2015-16 (depth to water below land-surface datum) diff1116 - Change in water-level altitude in feet, 2011-16 diff0016 - Change in water-level altitude in feet, 2000-16 diff9016 - Change in water-level altitude in feet, 1990-2016 diff7716 - Change in water-level altitude in feet, 1977-2016 CONTOUR - Water-level altitude in feet referenced to NAVD 88 or change in water-level altitude in feet for time period of dataset. SITE_NO - U.S. Geological Survey 15-digit site identification number in the NWIS database. This number is the primary ID used to retrieve data from NWIS. STATION_NM - Name of well defined by county identifier and state well number. U.S. Geological Survey Public Information Officer mailing address

1505 Ferguson Lane

Austin TX 78754 USA 512-927-3500 gs-w-txpublicinfo@usgs.gov Downloadable Data Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of these data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. Personal Geodatabase (9.3.1) Winzip 2 http://pubs.usgs.gov/sim/3365/ Shapefile Winzip 2 http://pubs.usgs.gov/sim/3365/ None. This dataset is provided by the U.S. Geological Survey as a public service. 20111229 U.S. Geological Survey Ask USGS - Water Webserver Team mailing address

1505 Ferguson Lane

Austin TX 78754 512-927-3500 gs-w-txpublicinfo@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 None. None. 20160520 09290600 FGDC CSDGM Metadata TRUE