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heavy rainfall events. This intersection drains a sizable light industrial area west of <br /> Bertelsen Rd. from both 13th Ave. And Interior St. The area is low -lying and <br /> adjacent to wetlands associated with the Willow Creek basin. The only storm - <br /> water structures draining this area are two curb inlets ( #54457 and 54523) near the <br /> cul -de -sac at the north end of Interior. These inlets drain into a 36" pipe, which <br /> runs west to the 48" pipe that runs north to Amazon Creek. In heavy rainfall <br /> events, the piped system surcharges and the high ground water causes sheet flow off <br /> of the properties and onto the street. The combined effects create considerable <br /> flooding at times. Engineering records dating back to the time of construction of <br /> these streets indicate that the street surface level may lie below the HGL. <br /> Recommended Solution: Have Engineering analyze this system as a whole and <br /> design and construct corrective measures to increase capacity. <br /> Status: In July1997, Maintenance installed two catch basins in the intersection and <br /> one catch basin along the south side of 13th Ave. and connected to the existing 42" <br /> pipe primarily as a measure to facilitate drainage following a major storm event, <br /> although this probably won't help during surcharge conditions. WRT is including <br /> this area in the Basin Study. <br /> 9 <br /> 97rchAbsis II /97bne <br />