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n =roo Bridge Inspection Report -=- AnderIIk & Bridge 02J04 1\l1 Assodates Brian Drive over Clearwater Creek EngJneers&ArchItects Owner: City of Centerville Structure Information Bridge 02J04 is two metal arch pipe culverts with each pipe measuring 9.75 feet wide, 6.5 feet high, and 89 feet long. The Structure was constructed in 1994 and provides conveyance of Clearwater Creek under Brian Drive. Inspection Information Bonestroo inspected the structure on May 2, 2006. The structure was inspected utilizing a canoe with a two person crew in the canoe and one person on the bank. The personnel in the canoe were Matt Jensen and Joel Benton, with Ryan Goodman on the creek bank. Structural Condition The structure is generally in good condition above the waterline, with little to no corrosion. There is localized damage to the south culvert. There is damage located at about the center of the culvert, just east of the center joint, at approximately 1 o'clock when looking east The culvert condition below the waterline could not be assessed. The culvert damage consists of a triangle shaped tear about one foot long by 6 inches high and a dent just to the west at the same elevation which is about 1 foot in diameter. This damage was caused during the reconstruction of Brian Drive on September 20, 2004. Reportedly, the contractor that caused the damage covered the tear with a metal plate (a typical manhole cover plate) and encased the plate with concrete. Both culverts have experienced slight distortion, which according to the most recent inspection report, likely occurred during original structure construction. There is some misalignment of the culvert joints but there is no infiltration of water through the joints. Hydraulic Condition The inspection was conducted during a higher water condition, with the area receMng occasional rain over a period of four days prior to the inspection. Based upon the water staining on the inside of the culverts, the high water is approximately 4 inches above the condition during the inspection. Clearwater Creek was flowing through both the north and south culverts from east to west. The culverts were flowing at one-third full. There was no ponding upstream of the culvert, so it is assumed that the culverts are functioning properly. There was excessive vegetation at the inlet and outlet of the north culvert. Brush, trees, and debris have accumulated and are causing restriction to the creek flow, particularly at the inlet (east end). Structure Photos, taken during the inspection, are on the following pages. Bridge 02J04 Page 1 of 5