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August 10, 1981 <br />Ramsey County <br />DEPARTMENT OF PUBLIC WORKS <br />3377 North Rice Street <br />Saint Paul, Minnesota 55112 <br />(612) 484 -9104 <br />Mr. George Gotwald <br />Carley Engineering Company <br />500 West Highway 96 <br />Shoreview, Minnesota 55112 <br />Demont Avenue and Rice Street Developments <br />Divisions of: <br />Engineering <br />Maintenance <br />Mobile Equipment <br />Environmental Services <br />Enclosed is a drainage study with our requirements for the proposed <br />developments at Demont Avenue and Rice Street. <br />In addition to the culvert sizes and ditch improvements, we recommend <br />the property owners provide adequate erosion control to prevent sedi- <br />mentation onto Demont Avenue. Ultimately, both sides of Demont Avenue <br />should be included in a storm sewer project to eliminate existing <br />problems. <br />The reconstruction of Demont Avenue as tentatively proposed in 1986 <br />will not be scheduled without extensive city participation in construc- <br />tion costs and interim development upstream will continue to overload <br />the existing ditch and culvert system. <br />Also, according to our calculations the 17" x 13" Arch CMP under the <br />proposed new Park Avenue connection to Demont Avenue should be upgraded <br />to a minimum 24" or equivalent for adequate drainage. <br />Please contact our maintenance office should any further clarification <br />be necessary or questions arise regarding this work. <br />Marvin D. Kotilinek, P.E. <br />Maintenance Engineer <br />MDK/clm <br />Enclosure <br />cc: KEW DGS PK <br />0 0 <br />