Airport Improvement Program March 11, 1988

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The City of Ramsey is currently in the process of extending public utilities to the industrial and commercial area along U.S. Highways 10 & 169. In 1987, sanitary sewer and watermain were extended to Sunfish Lake Boulevard between U.S. Highways 10 & 169 and Industry Avenue. It is anticipated that the sanitary sewer and water service would be available to the airport by 1995. Based on the City's Comprehensive Sanitary Sewer Plan, the sanitary sewer trunk serving the airport area would be con- structed adjacent to the Burlington Northern Railroad. A lateral sanitary sewer line serving the area north of the airport could follow the County Road 116 (Industry Avenue) corridor and would not be impacted by the airport expansion. In review of the sanitary sewer requirements for the airport, they are very minimal. The Comprehensive Sanitary Sewer Plan (CSSP) assumed full development of the area and the trunk sewers were sized accordingly. The CSSP also assumed that the airport area would pay full assessments for the sanitary sewer trunk extension. It would be difficult to prove benefit at a full development rate with the low projected wastewater flow. There- fore, the sewer allocation for the airport area may have to be allocated to other areas of the City and assessed accordingly. In review of the City's Comprehensive Water Plan (CWP), one trunk watermain is proposed on the south end of the airport and one trunk watermain is proposed to follow County Road 116. Since the need for water at the airport site is minimal, the proposed trunk along the existing Industry Avenue alignment can be moved with the relocation of Industry Avenue. As is the case of the sanitary sewer system, the C.W.P was based on full development of the airport area. Therefore, the estimated trunk, source and storage costs were based on assessing the airport property. Since the water demand of the airport is low, the trunk facilities may be downsized to compensate for the loss of assessments. Drainage improvements to the area as proposed in the Comprehensive Storm Drainage Plan includes a 75 acre feet ponding area on the east side of the airport and channel and pipe construction to provide an outlet to the Mississippi River. The impacts of the airport expansion will be minimal compared to full development of the area. It is anticiapted that of the 230 acres of land to be used for the airport, only 27 acres or 12 percent will be hard surfaced. Therefore, runoff from the airport area will be handled on -site by a series of detention basins. 2-48