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1 I 1 Council Meeting Minutes May 12, 1992 Page 8 Council Business. continued Council then ordered information on a number of alternatives which were found to have higher costs. The Council's final action was to approve the lower cost alternative 7th St. storm sewer. The project was completed in 1976. The present staff discovered the Emerald/Oakwood system is substantially undersized. Because of topography, there is no way to prevent portions of the church property, 9th St. and 7th St. from draining into the backyards of the homes on Oakwood. Proper outlined the short term solutions: Ramsey County would restore lost capacity of 6 large catch basins at 19th Ave, and Oakwood; the northeast pond on the church property should reduce the rate of runoff to the backyards; the grates on 6 existing catch basins on 7th St. at 19th Avenue and Oakwood Drive would be replaced with new vane grates; installation of a slotted vane grate above 19th Ave.; installation of a low bituminous berm across Oakwood Drive at 7th St,; and a high capacity catch basin installed on the outfall line of the Oakwood/Emerald system. Long term solutions include: extension of the 7th St, storm sewer to 23rd Ave.; acquisition of Twin Cities Army Ammunition Plant (TCAAP) 24 inch forcemain located 7th St. and 23rd Ave.; replacement of the undersized storm sewer on Emerald Drive along with proposed street rehabilitation in 1997. The TCAAP forcemain could be used for the 7th St. storm sewer at a considerable savings over installing new pipe. The Army is unable to give exact date for abandonment of the forcemain because it is dependent upon a smaller gravity sewer installation. Rebelein asked which short term solutions could be used as long term solutions. Proper said all the short term solutions have long term benefit, with the exception of the slotted vane grate and low berm which will be removed when the new storm sewer is installed. Rebelein feels all of the short term solutions appear practical, except for the slotted vane grate, Proper agreed the vane grate is not cost effective. and noted that one high capacity catch basin would have just as much capacity as the vane grate. Bob Kozel, 810 Oakwood, has had flooding problems for 26 years. and the church property is the main cause of the runoff problems. He feels a complete sewer system should have been installed 20 years ago when the assessment rates were lower. Benke said the ultimate solution is to extend the pipe further up the hill, and it is premature for Mr. Kozel to assume the City is not listening to his concerns. The Question is whether to spend a large amount of money and install the new system or wait until the TCAAP forc8main is available. The City's obligation is to find the best solution which meets everyone's needs. He directed staff to implement the short term solutions, with the exception of the slotted vane grate. Council Business Report on Drainage Problem in the 7th St. NW Area. Report 92-110