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Layer: Tidal Influence Zone (ID:5)

View In:   Map Viewer

Name: Tidal Influence Zone

Display Field: FNODE_

Type: Feature Layer

Geometry Type: esriGeometryPolyline

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

Copyright Text:

Min. Scale: 3200000

Max. Scale: 0

Default Visibility: false

Max Record Count: 1000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

Drawing Info:

HasZ: false

HasM: false

Has Attachments: false

Has Geometry Properties: true

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: OBJECTID

Unique ID Field:

Global ID Field:

Type ID Field:

Fields:
Templates:

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 7/27/2021 6:31:59 PM

Schema Last Edit Date: 7/27/2021 6:31:59 PM

Data Last Edit Date: 7/27/2021 6:31:59 PM

Supported Operations:   Query   Query Top Features   Query Analytic   Query Bins   Generate Renderer   Validate SQL   Get Estimates   ConvertFormat