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I I I Council Meeting Minutes April 26, 1994 Page 3 Public Hearing - Street Reconstruction Project 94-4, Report 94-101 City Engineer Les Proper presented the feasibility study for Project 94-4, PGAC Utility Pipelines and Street Reconstruction. The projects consists of the construction of pipelines from the Permanent Granular Activated Carbon (pGAC) facility at 3001 - 5th St. to the intersection of 7th St. and 8th St. NW; reconstruction of 7th St. from 8th Ave. NW to Silver Lake Road, and 23rd Ave. from 5th St. to 7th St.; and storm sewer installation on 7th St. As part of the Army's remediation plan, Well 14 is proposed to be located adjacent to Well 11 and We1115 will be located next to the PGAC. Both the City and Army have agreed to construct an addition to the PGAC facility which will remove the iron and manganese from the water. This necessitates the installation of new utility pipelines to carry raw water and waste water. The new pipeline will carry untreated water from Well 14 to the PGAC to remove contaminates before entering the municipal water system. The Twin Cities Army Ammunition Plant (fCAAP) will be abandoning a sanitary sewer force main routed along 7th St, 23rd Ave., and 5th St. This force main may become available for use as either the waste water pipeline from the PGAC or the storm sewer which the City needs to install on 7th St. Several options were considered by the Army and City to combine the use of existing and new utilities for the conveyance of the raw water, waste water and the storm sewer. If the force main is not available in time to be included in this project as the waste water line, it can be converted when it becomes available. Conveyance of waste water flow from the PGAC will not be required until mid 1995. The option chosen was to install a new raw water pipeline and use the existing TCAAP force main as the gravity waste water pipeline, and the City would install a new storm sewer on 7th St. The drainage plan identifies two areas needing storm sewers. The existing storm sewer between Co. Ditch 2 and 18th Ave. is proposed to be extended to Silver Lake Road. The sewer is needed because of drainage problems in the Oakwood and Emerald Drive areas. The new sewer will intercept the runoff at catch basins and carry the water underground to the existing storm sewer and to Co. Ditch 2. The other area requires a new storm sewer on 7th St. from Co. Ditch 2 to 13th Ave. This sewer will intercept run-off from the east before it reaches the bottom of the hill. The street reconstruction is recommended because of the road's age and poor condition. The reconstruction of 23rd Ave. consists of the removal of existing surfacing, installation of barrier type concrete curb and gutter. Staff is recommending the continuation of a standard 32 ft. width street. There was strong resident support for this project, however, there was luke warm support for the 7th St. The reconstruction will be made very close to existing grades with some minimal alterations. Any changes to driveways or lawns will be repaired with in- kind materials. Public Hearing Project 94-4 Report 94-101 Resolution 94-053