![]() ![]() Other rivers are called ‘ordinary watercourses’. Traditional navigable waters (or waters that are traditionally understood as navigable) refers to all waters which are currently used, were used in the past, or may be susceptible to use in interstate or foreign commerce, including all waters subject to the ebb and flow of the tide.The main river map shows which rivers in England are designated as ‘main rivers’. This excludes Section 10 aquatic resources that are now "fast land"/dry land that are not considered jurisdictional under Section 404.Ģ Section 404 - TRADITIONAL NAVIGABLE WATERS: are also considered to be Traditional Navigable Waters regulated under Section 404 of the Clean Water Act. All waters determined to be navigable waters of the U.S. A determination of navigability, once made, applies laterally over the entire surface of the waterbody, and is not extinguished by later actions or events which impede or destroy navigable capacity. Navigable waters of the United States are those waters that are subject to the ebb and flow of the tide and/ or are presently used, or have been used in the past, or may be susceptible for use to transport interstate or foreign commerce. Roger Road wastewater treatment plant (WWTP) to the Pima/Pinal County lineġ Section 10 - NAVIGABLE WATERS OF THE UNITED STATES Tubac gage station (USGS #09481740) to the Continental gage station (USGS #09482000) Painted Rock Dam to Confluence with Colorado River Navigable ( COMDT MEMO 30 NOV 77 CoE LTR SPL Navigability Table ) Navigable ( CoE LTR SPL Navigability Table ) From a point in northern Arizona to the downstream end of Cataract Canyon, 146 miles above the state boundary * Tidal datums used above to identify extent of Corps jurisdiction include Mean High Water (MHW) and Mean Sea Level (MSL). Nonnavigable ( D11 MEMO 3 JUN 87 CoE LTR 29 NOV 72) Navigable ( COMDT LTR 12 Nov 69 CoE LTR 29 NOV 72) San Luis Obispo Creek (to Mile 1.3 to 2.5 ft MSL)Ĭarpinteria (El Estero) Marsh (to 2.5 ft MSL) Pismo & Arroyo Grande Creeks (to 2.5 ft MSL) Navigable ( D12 LTR 6 FEB 79 CoE LTR 29 NOV 72) Morro Bay (Lower) (to MHW to 2.4 ft MSL) Navigable ( D12 LTR 6 FEB 79 CoE NOTE 15 JUL 78) Navigable ( D12 LTR 6 FEB 79 CoE LTR 2 AUG 71) Navigable ( D11 MEMO 12 FEB 79 CoE LTR 29 NOV 72) San Luis Rey River (to Route 76 to 2.5 ft MSL) Navigable ( Dll MEMO 8 MAR 85 CoE LTR 29 NOV 72) San Dieguito River (to I-5 to 2.5 ft MSL) Navigable ( D11 MEMO 30 SEP 76 CoE LTR 29 NOV 72) ![]() Navigable ( Dll MEMO 5 MAR 86 CoE LTR 29 NOV 72) Los Penasquitos Lagoon (to I-5 Bridge to 2.5 ft MSL) Navigable ( CoE LTR 29 NOV 72 D11 MEMO 29 MAR 80) Westminster Flood Control Channels: Bolsa Chica Channel (C02), Westminster Channel (C04), East Garden Grove-Wintersburg Channel (C05) Navigable ( Dll MEMO 16 SEP 80 CoE LTR 29 NOV 72) San Gabriel River (to 7th Street Bridge to 2.5 ft MSL) Navigable ( Dll MEMO 22 JAN 80 CoE LTR 29 NOV 72) Navigable ( D11 MEMO 27 MAY 80 CoE LTR 29 NOV 72) Confluence of Arroyo Calabasas and Bell Creek to San Pedro Bay Navigable ( Dll MEMO 23 AUG 78 CoE LTR 17 FEB 58) Los Angeles/Long Beach Harbor (to MHW to Mile 8) Traditional Navigable Water Determination 2 (per Section 404 Clean Water Act 33 CFR Section 328.3(a)(1)) Navigation Study Determination 1 (per Section 10 Rivers and Harbors Act 33 CFR Section 329.14) In particular, all waters subject to the ebb and flow of the tide may be considered Section 10 Navigable Waters and Section 404 Traditional Navigable Waters, beyond those specifically identified below. These jurisdictional waters have been identified as a result of studies conducted by the Corps, or federal court rulings, and do not represent all waters potentially considered to be Section 404 TNWs or Section 10 Navigable Waters. The waterways and waterbodies listed below are regulated within Los Angeles District as "Traditional Navigable Waters" (TNWs), pursuant to Section 404 of the Clean Water Act, and/or "Navigable Waters," pursuant to Section 10 of the Rivers and Harbors Act. ![]()
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