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ET' OF pm, DEPARTMENT OF THE ARMY <br /> ?/k� •�.? '� PORTLAND DISTRICT.CORPS OF ENGINEERS <br /> 6< r <br /> I� T, N P.O.BOX 2946 <br /> O ,r12/ PORTLAND.OREGON 97208-2946 <br /> Reply to November 7, 1988 <br /> Attention of: <br /> Operations Division (CENPP-OP-E) <br /> Mr. Robert Hammitt, Manager <br /> Public Works Maintenance Division <br /> 1820 Roosevelt Boulevard <br /> Eugene, Oregon 97402 <br /> Dear Mr. Hammitt: <br /> The joint inspection of Amazon Creek in the City of Eugene during July 1988, <br /> by Mr. John Todd of the U. S. Army Corps of Engineers, Portland District and Mr. <br /> Richard Zucker, your Maintenance Supervisor was profitable. The inspection served <br /> three important purposes, it: <br /> (1) Provided technical assistance to help you (sponsor) maintain the flood <br /> control works to a dependable flood protection standard. <br /> (2) Evaluated your (sponsor's) compliance with the maintenance agreement <br /> -with us (Corps). <br /> (3) Determined what you (sponsor) must do now to be eligible for our <br /> (Federal) rehabilitation assistance when the flood control system is damaged <br /> during a flood. <br /> Our inspection found the general maintenance of your flood control works <br /> to be acceptable. However, the following deficiencies were noted and discussed: <br /> a. Drainage structures should be maintained to assure that the pipes are <br /> sound, that inlet and outlet channels are kept open and that trash, drift or <br /> debris is not allowed to accumulate near the structures. Flap gates and manually <br /> operated gates and valves should be inspected, oiled and operated every 90 days <br /> to assure they are in good working condition. Many of your drainage structures <br /> are not being adequately maintained. This does require attention in the near <br /> future. <br /> b. The trees and brush growing on the levee create a threat to the structural <br /> integrity of the levee and need to be removed. The root systems create voids and <br /> passageways for water, dislodge riprap and cause erosion problems. Brush and briars <br /> also form ideal habitat for burrowing animals, make it difficult to inspect levee <br /> conditions, and can hinder flood fight activities. We strongly recommend that <br /> excessive brush and any trees over two inches in diameter be cleared off the levee <br /> and the stumps chemically treated to prevent resprouting. Berry vines were noted <br /> growing into 'the concrete lined channel downstream from Willamette and 16th <br /> Street andso near Station 515+00. Trees are, present along the side slopes down- <br /> stream of Fir Butte Road. <br /> c. The slide that has occurred in the vicinity of Station 50+00 has been <br /> repaired, however, the area is continuing to move. Additional remedial solutions <br /> should be investigated. <br /> 0 <br />