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<br />September 15, 2004 <br /> <br />Lower Arkansas River Basin <br />District 10 <br />Diversion Structure Inventory <br /> <br />2 PBWW Northside Intake <br /> <br />Narrative of Structure Components and Repair Plan <br /> <br />The Pueblo Board of Water Works (PBWW) Northside Intake structure was originally <br />constructed in 1949. There is no dam/spillway at the structure location, only a broken <br />concrete rubble jetty protruding from the south bank to help guide the river flow toward <br />the intake structure. The diversion structure is located on the north bank along the <br />outside curve of the river. The intake structure consists of two 2.5-foot-wide steel <br />vertical lift gates with a galvanized trash rack bolted to the headwall and upstream <br />wingwall. A chain-link fence with locked gates surrounds the structure. There is a <br />timber debris guard approximately 15 feet upstream of the structure. A 6-foot-wide <br />concrete box culvert of unknown depth is located downstream of the structure that <br />conveys flow downstream. Above the box is an open channel, approximately 10-feet- <br />wide by 4-feet-high, and appears to be an overflow. Concrete walls form the channel <br />banks. The north wall extends approximately 400 feet downstream, and the south wall <br />extends approximately 0.25 miles. The north wall is constructed of concrete with <br />counterforts, and the south wall is mostly a stone and mortar wall with some concrete. <br /> <br />The overall condition of the structure appears to be good. Pressure-injected grout is <br />needed for the cracks found through the concrete diversion structure. Crack repair is <br />needed for the downstream walls, including filling of the cold joints. The upstream <br />wingwall has several significant cracks and is in need of repair. Another concrete wall <br />was poured behind the upstream wingwall more recently. Additional rock should be <br />placed to reinforce the jetty. Additional bank stabilization is needed upstream and <br />downstream of the structure along the outside curve of the river bank. <br /> <br />Summary of Recommended Repairs <br /> <br />Diversion (I ntake) <br />o Repair damaged concrete <br />o Place additional rock for upstream jetty <br />o Install additional stabilization along north bank <br /> <br />Estimated Ranae of Cost <br /> <br />Low: $0 - $250,000 <br /> <br />Farnsworth Group <br />