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<br />~ <br /> <br />GENERAL <br /> <br /> <br />OPERATION ~~ MAINTENANCE MAhTAL <br />LAS Pu~n~s FLOOD CONTROL PROJECT <br />LAS ANIMAS, COLORADO <br /> <br />SECTION I <br /> <br />1-01. Authority. This Operation and Maintenance Manual is <br />prepared and furnished pursuant to the requirements of Title 33, <br />Navigation and Navigable Waters, Code of Federal Regulations, <br />Part 208, Flood Control Regulations, Section 208.10, Local Flood <br />Control Works; Maintenance and Operation of Structures and <br />Facilities. <br /> <br />1-02. Purpose. The purpose of this manual is to provide infor- <br />mation and assistance to the Arkansas River Conservancy District, <br />the project sponsor, regarding proper operation and maintenance <br />practices which are required for the Las Animas Flood Control <br />Project. <br /> <br />1-03. Project Authorization. The Las Animas Flood Control <br />Project was authorized by the Flood Control Act of 1965, Section <br />204, Public Law 89-298, 89th Congress, 1st Session, House Docu- <br />ment 165. <br /> <br />1-04. Project Description. The Las Animas Flood Control Project <br />provides protection to the city of Las Animas and vicinity <br />against flooding from the Arkansas River. The project consists <br />of two separate levees. The main levee, situated on the south <br />bank of the river protects the city and adjoining agricultural <br />lands while a shorter levee, on the north bank, protects a <br />portion of State Highway 194 and a few cultivated fields. Levee <br />bank protection against scour is provided by a double row of <br />steel jetties placed at critical locations along the levee toe. <br />In addition, riprap is utilized at the outlet of all interior <br />drainage structures. A stop log closure structure is provided at <br />the intersection of the AT&SF railroad and the south bank levee <br />to provide continuity in the levee during high flood stages. <br /> <br />1-05. Interior drainage facilities consist of drain ditches <br />along the landside toe of the levee to collect and transport <br />interior rainfall runoff to designated ponding areas. Ponded <br />water is then conveyed through the levees into the river via <br />gated gravity drainage structures. The general project flow is <br />shown on Plate No.1. Pertinent data on the project structures <br />are presented below. <br /> <br />I-I <br />