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a. The corridors far underground utility lines shall be 20 feet wide for excavations or <br />pipes up to 1 ~ feet below ground surface bgs}, 3 ~ feet wide for excavations or <br />pipes from 10 to 15 feet bgs, and 4o feet wide for excavations or pipes deeper <br />than 15 feet bgs, where two utility lines are close to each other, the corridors far <br />the Lines may overlap, but impacts for work on one line are allowed only within <br />the corridor width far that line, not the combined width of both lines. <br />b. The corridors for above ground utility lines shall be 10 feet wide for single ole <br />P <br />structures and 2a feet wide for double pole ~"H-style"} structures. <br />c. The utility corridors shall be centered on an existing utility line, extending an <br />equal distance half the allowed width} on both sides, except for corridors for new <br />utility lines, which shall be located as specified in subsection d below. <br />d. Construction of new utility lines and new connections to existing utility lines <br />within wetlands designated for protection shall require an amendment of this plan <br />tv change the designation from "protect" to "utility line corridor." Such <br />amendments will only be allowed where it is demonstrated that: <br />1 } an alternatives analysis has concluded that locating the new utility line <br />within a protected wetland is the best alternative. The alternatives analysis <br />shall compare alternatives that are completely outside of protected <br />wetlands and compare them to any alternatives that impact protected <br />wetlands. The alternatives shall be evaluated by weighing engineering <br />requirements and total environmental impacts including impacts to <br />threatened and endangered species and their habitat, and to wetlands <br />designated in the Plan for restoration or protection. <br />2} the new construction cannot reasonably be constructed completely outside <br />of wetlands designated for protection as demonstrated in the above- <br />referencedalternativesanalysis; <br />3} the utility lines are located so as to reduce the impact to wetlands <br />designated for protection as much as possible, and in no case shall a <br />cumulative area greater than 1acre be re-designated from "protection" to <br />"utility corridor" far a new utility line; <br />4} unavoidable impacts will be mitigated through restoration of the project's <br />entire impact area; <br />5} there are no impacts to wetlands from new utility Lines installed within the <br />Willow Creek Natural Area; and <br />6} impacts to plant and animal species on lists 1 and 2 of the Oregon Natural <br />Heritage Program will not occur. <br />