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<br />, , <br /> <br />positive effects in that there will be less stream disturbance from irrigation with the <br />project in place. <br /> <br />HUMAN/CULTURAL RESOURCES - There are no known cultural resources in the <br />areas of construction therefore no impacts are anticipated. <br /> <br />HUMAN/ECONOMICS - The project will provide a more efficient irrigation delivery <br />system for the producers. It will also ensure a reliable water supply with less <br />maintenance costs. The combined impact should be a more cost effective irrigation <br />delivery system. I V\dvJ,\'\'1 l~ k ~vW'\ ~ a",~ nil f"I''f)~. <br /> <br />TWO DIVERSION ALTERNATIVE (Alternative 2) <br /> <br />This alternative involves the construction of two diversions, one at the Mt. Harris site <br />and another at the Walker Diversion. The later would divert both Walker and Shelton <br />ditch decrees. The other components remain the same accept are reduced in size due <br />the second diversion. <br /> <br />Components: <br /> <br />The following list of major component extents are preliminary estimates. (2-Diversions, <br />6,300 ft of new ditch, 1,800 ft. of concrete lined ditch, 12,800 ft. of ditch enlargement _ <br />capacities up to 138 cfs.) In addition to these improvements there would be a need for <br />several railroad/road crossings, utility crossings, and water control structures. <br /> <br />Costs: $3.273,000 /' <br /> <br />Effects: <br /> <br />SOIL RESOURCE - Streambank erosion and entrenchment will be reduced to the <br />same degree as with the ONE DIVERSION approach. <br /> <br />SURFACE WATER - The amount of sediment loading from the project area will <br />reduced to approximately the same extent as with the ONE DIVERSION alternative. <br /> <br />WETLANDS - Some wetlands in the project area will see an increase in available water <br />while others will get less due to the change in diversion points. It is believed that those <br />wetlands receiving additional water will increase in size, thus offsetting any losses due <br />to the change in diversion points. <br /> <br />WATER QUANTITY - With the planned system improvements in place there will not be <br />a problem being able to divert the agricultural producers decreed water. The improved <br />system will also eliminate some seepage losses presently occurring. <br /> <br />PLANTS/RIPARIAN HABITAT - Some habitat will be destroyed during construction but <br />most of it will return. The habitat which exists along abandoned portions of canal will <br />probably be lost over time. <br /> <br />ANIMALS/ENDANGERED SPECIES - It is not known how project action will impact the <br /> <br />Hayden 15 <br />