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Lamar County Multi- Jurisdictional Hazard Mitigation Plan <br />Chapter Three <br />92 <br />from detailed analyses are shown. <br />Areas with a temporarily increased flood risk due to the building or <br />restoration of a flood control system. Mandatory flood insurance purchase <br />AR (High Risk) <br />requirements will apply, but rates will not exceed the rates for unnumbered <br />A zones if the structure is built or restored in compliance with Zone AR <br />floodplain management regulations <br />Areas with a 1 % annual chance of flooding that will be protected by a <br />A99 (High Risk) <br />Federal flood control system where construction has reached specified legal <br />requirements. No depths or base flood elevations are shown. <br />Areas outside the 1 % annual chance floodplain, areas of 1 % annual chance <br />B, C, and X (Moderate to <br />sheet flow flooding where average depths are less than 1 foot, areas of 1 % <br />Low Risk) <br />annual chance stream flooding where the contributing drainage area is less <br />than 1 square mile, or areas protected from the 1 % annual chance flood by <br />levees. Insurance purchase is not required in these zones. <br />D (Undetermined Risk) <br />Areas with possible but undetermined flood hazards. No flood hazard <br />analysis has been conducted. <br />92 <br />