Agenda - Council - 09/30/1980 - Special

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con.suiting engineers diversified lpg, ~ Main Office; P.O. Box J, Osseo, Minnesota 55369 (6'12) 425-2~8'1 South Office: 8500 2'10th St. W., Lakevllle, Minnesota 55044 (6'12) 469-388'1 September 30, 1980 Honorable Mayor and City Council City of Ramsey ]5153 Nowthen Boulevard Anoka, Minnesota 55303 Re- Street Improvement Tungsten Street Dear Council Members: As requested at your September 23, 1980, council meeting we have reviewed the drainage at the intersection of Rivlyn Avenue and Tungsten Street and also looked at the possibility of overlaying Tungsten Street. In review of the Rivlyn Avenue drainage'we found that the ditches along Rivlyn Avenue slope toward Tungsten Street. However, the ditches on the north side of Rivlyn have been filled at the intersection of Tungsten Street to limit the run- off during periods of normal rainfall from flowing north along Tungsten Street. During heavy rains and prior to the spring thaw some of the runoff from Rivlyn Avenue will flow north along Tungsten Street. To eliminate runoff from the south side of Rivlyn Avenue from flowing across the street and north unto Tungsten Street we would recommend a drainage inlet be placed on the existing manhole. For the occasional runoff from the north side of Rivlyn we would not recommend any construction at this time. Since the storm sewer was constructed for the commercial development in the area, we would recommend that the City pick up the residential share of the storm sewer assessment and assess this cost out at the time Rivlyn Street is upgraded to urban standards. This procedure is outlined in Chapter 429.051 of the Minnesota Statutes. We also reviewed the possibility of overlaying Tungsten Street as an interim solution until sewer and water are installed. An overlay of the street at the existing grades would result in water ponding in several areas along the west side of Tungsten. To eliminate the majority of the ponding water we would recommend that the street be excavated approximately 150 feet north of Rivlyn Avenue and a swale civil · municipal · planning · environmental · land surveying · geotechn$cs · waste treatment