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<br />. <br /> <br />- East Pipeline <br />Approximate length: <br /> <br />. <br /> <br />Acreage irrigated: <br />Water requirements: <br />Approximate cost; <br /> <br />. <br /> <br />- West Pipeline <br />Approximate length: <br /> <br />Acreage irrigated: <br />Water requirements: <br />Approximate cost: <br /> <br />2,350 feet of 6-inch pipe <br />2,650 feet of 4-inch pipe <br />See Table 6 <br />0.5 cts for 138 days; 137 acre-feet <br />$40,500 for construction; S500/yr for O&M <br /> <br />3,900 feet of 6-inch pipe <br />2,850 feet of 4-inch pipe <br />See Table 6 <br />0.8 cfs for 138 days; 219 acre-feet <br />$59,500 for construction; SSOO/yr for O&M <br /> <br />Southern Section <br /> <br />Total estimated cost for pipeline: $100,000 for construction; $1,OOO/yr O&M <br /> <br />. <br /> <br />The irrigation system in the southern section will involve improvement and upgrade of an existing <br />diversion dam and ditch system that runs parallel to Muddy Creek on the west side of the valley. Map <br />2 presems the location of the channel control structure and ditch and other details associated with the <br />repair and upgrading of structures and the location of headgates needed to adequately distribute water <br />over the target acreage. Figure 4 presents details of proposed headgate assemblies that will be used <br />to distribute water over areas targeted for irrigation. Details associated with the proposed irrigation <br />system southern section are presented below. <br /> <br />. <br /> <br />Irrlqation/Channel Control Structure and Irrlaatlon Dttch. The irrigation system in the southern <br />section will utilize an existing diversion dam and ditch system that runs parallel to Muddy Creek on <br />the west side of the valley. The channel control structure will be constructed using large size rip rap <br />and will be 2 to 3 feet in height. Details of a typical channel control structure are presented in Figure <br />5. Figure 6 presents details of proposed ditch construction that will be used to distribute water over <br />areas targeted for irrigation. <br /> <br />. <br /> <br />. <br /> <br />Water backed up by the irrigatiorVchannel control structure will also serve to subinigate wetlands <br />adjacent to the creek for approximately 6,500 feet upstream. The pOl1ion of the mitigation area <br />affected by this ponded water is in a location where the creek basin narrows significantly. <br />Consequently I long distance lateral movement of water from the creek will not be necessary to create <br />subirrigated conditions. Additionally, increased elevation of the water table level will serve to maintain <br />water in several oxbow ponds located just upstream of the channel control structure. Details <br />associated with this alternative are as follows: <br /> <br />. <br /> <br />- Irrigation Ditch/Control Structure. <br /> <br />. <br /> <br />Approximate length: <br />Acreage irrigated: <br />Water requirements: <br />Approximate cost: <br /> <br />, <br /> <br />, <br /> <br />13.200 feet of ditch <br />See Table 6 <br />1.1 cfs for 138 days; 301 acre-featlyr <br />$18,000 for ditch repair and upgrade <br />$6,100 for construction of channel control structure <br /> <br />14 <br />