Description: Public access points to bays and Gulf beaches in Texas coastal counties. Data collected by the Texas General Land Office in cooperation with coastal municipal and county governments.
Description: Point locations representing marinas in Texas coastal counties. Data digitized by Texas General Land Office based on information maintained by GLO and Texas Parks and Wildlife Dept. (street addresses and verbal descriptions).
Description: Locations of bathymetric values generated by GLO personnel from coordinate data provided by the National Oceanic and Atmospheric Administration (NOAA). Data are not to be used for navigation and may not accurately depict current bathymetric features.
Description: This layer depicts the official TCEQ Stream Segments for the State of Texas as listed in Title 30, Chapter 307 of the Texas Administrative Code (TAC), also known as the Surface Water Quality Standards. These are streams and waterbodies that have been individually defined by the TCEQ and assigned unique identification numbers. Intended to have relatively homogeneous chemical, physical, and hydrological characteristics, a segment provides a basic unit for assigning site-specific standards and for applying water quality management programs of the agency.
Both "classified" and "unclassified" segments have been included in this layer. Classified segments, also referred to as designated segments, refer to water bodies that are protected by site- specific criteria. The classified segments are listed and described in Appendix A and C of Chapter 307.10. The site-specific uses and criteria are described in Appendix A. Classified waters include most rivers and their major tributaries, major reservoirs, and estuaries. Unclassified waters are those smaller water bodies that do not have site-specific water quality standards assigned to them, but instead are protected by general standards that apply to all surface waters in the state.
This layer also indentifies which segments and water bodies have been listed as impaired or threatened in the final draft of the Texas 2000 Clean Water Act Section 303(d) List (effective December 19, 2002). 303(d) Lists from other years can be accessed from TCEQ's Texas Water Quality Inventory and 303(d) List page. An impaired segment is a water body which does not meet the standards set for its use, or is expected not to meet its use in the near future. The database file associated with this layer contains fields which indicate which segments are impaired and which pollutants are responsible for the failure of those segments to meet water quality standards. For additional information and data related to Texas Surface Water Quality, please refer to the following TCEQ web site:
http://www.tceq.state.tx.us/nav/data/swq_data.html
PLEASE READ THE FOLLOWING IMPORTANT INFORMATION!!
This layer is not a complete hydrographic layer of Texas. It is only meant to show the classified and unclassified stream segments for the state. Therefore, many stream segments and water bodies will appear to be detached. To fill in the remaining hydrography, this layer should be used with the certified layer entitled "Major Streams".
When viewing the impaired segments, please note that for many segments, only a portion of that segment may be impaired! To determine which part of the segment is actually impaired, you must refer to the "Segment Summary" in the online 303(d) List
Description: The digital vector shoreline, NOAA Medium Resolution Digital Vector Shoreline, was imported directly into GMT (Generic Mapping Tools), where it was considered to be the zero contour for both bathymetry and land topography. It was exported in a postscript file to Adobe Illustrator, where it was edited, and then imbedded in an image file. The Adobe Illustrator image file was imported into Arc-GIS, and separated from the bathymetry and land topography into a stand-alone shapefile. The NOAA Medium Resolution Digital Vector Shoreline is a high-quality, Geographic Information System-ready, general-use digital vector data set originally created by the Strategic Environmental Assessments (SEA) Division of NOAA's Office of Ocean Resources Conservation and Assessment. The Medium Resolution Digital Vector Shoreline is now managed by the NOS Special Projects Office. It was compiled from hundreds of NOAA coast charts, this product comprises over 75,000 nautical miles of coastline (nearly 2.5 million vertices), representing the entire conterminous United States of America.
For information on the NOAA digital vector shoreline, refer to: http://www.ngdc.gov/mgg/shorelines/noaamrdvs.html
For information on GMT, refer to: http://gmt.soest.hawaii.edu/
Note: Support of the Texas Parks and Wildlife Department in preparation of these datasets is gratefully acknowledged.
Description: Ship Channels and Gulf Intracoastal Waterway maintained by the U.S. Army Corps of Engineers. Digitized by Texas General Land Office from engineering drawings of various scales provided with Corps of Engineers dredging plans.
Description: Boundaries of shipping safety fairways in the Gulf of Mexico offshore of Texas. Digitized by Texas General Land Office in AutoCAD 12 from lat/lon coordinates provided by the U.S. Army Corps of Engineers.
Description: Locations of U.S. Coast Guard (USCG) stations in Texas coastal counties. Data digitized by Texas General Land Office based on USCG information.
Description: Placement areas for dredged material (spoil) designated by the U.S. Army Corps of Engineers. Digitized by Texas General Land Office from engineering drawings of various scales provided with Corps of Engineers dredging plans.
Description: Undeveloped coastal areas in Texas in the Coastal Barrier Resources System, with other protected areas of barrier islands. Data digitized by Texas General Land Office from U.S. Fish and Wildlife Service hardcopy maps produced pursuant to the Coastal Barrier Improvement Act (P.L. 101-591).
Description: The Texas General Land Office rules for management of the beach/dune system
(31 TAC sections 15.1-15.10) define "eroding areas" as "a portion of the
shoreline which is experiencing a historical erosion rate of greater than
two (2) feet per year based on published data of the University of Texas
at Austin, Bureau of Economic Geology." An eroding area is considered
critical when the rate of erosion exceeds two (2) feet per year and poses
a threat to:
- public infrastructure or areas of national importance,
- public beach access and recreation,
- traffic safety,
- private property, or
- fish or wildlife habitat.
Nine critical erosion areas were determined from a ranking system and public
input.
For a detailed description of the erosion areas, ranking criteria, potential
solutions and funding sources and much more, see the Texas Coastwide
Erosion Response Plan or contact the Texas General Land Office, Coastal
Division, 1-800-85-BEACH or (512) 463-5385.