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Lamar County Multi- Jurisdictional Hazard Mitigation Plan <br />Chapter Three <br />3. Extent <br />The National Inventory of Dams is a registry of information about water barriers that are equal to <br />or greater than 25 feet or in pounds 50 acre -feet or more of water. The registry also includes <br />structures that are over six feet in height, where failure would <br />potentially cause damage downstream. Dam Failure is a valid IN <br />concern for residents in vicinity of the four high hazard dams in the An Acre -Foot - is <br />county. There are no jurisdictions that would be directly affected by equal to 325,851 <br />the inundations of the dams in the county but with the extended gallons, of water <br />heavy rain period a small dam failure could add to the flooding <br />problems of jurisdictions downstream. <br />Table 3: national Inventory of Dams - Lamar County <br />Lamar County is home to 72 dams recorded with the National Inventory of Dams. There are 41 <br />dams in the county that are at least 25 feet high and /or have storage of 150 acre feet or more. <br />These dams are high- hazard and need an Emergency Action Plan (EAP). High- Hazard <br />classification signifies that the failure of such structure could cause loss of human life. The Low - <br />hazard dams are those at which failure would be limited primarily to the owner's property and <br />may not be noticed at all and are not required to have an EAR These classifications are <br />bestowed by the Texas Commission on Environmental Quality (TCEQ). <br />127 <br />