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Public Works Engineering City of Eugene 244 East Broadway Eugene, Oregon 97401 (541) 682-5560 (541) 682-8410 FAX Memorandum Date: March 31, 2005 To: File From: Jenifer Willer Subject: Mill Race Head Gate Rehabilitation Public Works Maintenance identified the Mill Race Head Gate as a capital improvement project for storm water rehabilitation in a list dated January 4, 2005 by Wayne Masoner. Wayne's description of the head gate was as follows: The head gate at the inlet of the Mill Race, #57269, is in very poor condition and needs to be replaced. This head gate plays an important role in our efforts to control the level of the Millrace. Maintenance, Parks and Open Space adjust the head gate in response to weather and flow conditions and in cooperation with the University of Oregon Physical Plant, which operates and maintains two pumps that supply water from the Willamette River to the Mill Race. If the head gate should fail, our ability to respond to high-water or low-water conditions in the Mill Race would be seriously diminished or even lost altogether. On March 31, 2005 I visited the site with Paul Klope and representatives from Maintenance, including Wayne Masoner and the primary operators of the head gate, Richard and Jersey. It appears that replacement of the actual sluice gate head gate is the minimum rehabilitation needed. The angle irons that guide the sluice gate and the wheeUvalve base are significantly deteriorated and are already causing difficulties in operating the gate. Other items noted at the site to be investigated were lack of signing of the facility for safety/trespass, log boom condition, weir boards and concrete guides condition, the lack of a grate before the sluice gate, channel and channel wall condition. Jersey explained the operation of the gate and optimal operating conditions. Richard provided electronic photos of a low water condition where the gate was visible.