2006-064 Ordinance - Laserfiche WebLink

Home Browse Search

_. _,..ffi.._......,~,~~,„,,i~w.,~,....__,._~. _ _ _ ,,.. ,.~~, ~. ~~ Plan of Study for City of North Olmsted Phase I by Floyd Browne Group January 4, 2006 water entering around the foundations and to prevent yard flooding. This may be the best long term solution, but it is one that will take more time. Conclusions As can be seen from the information researched, the data collected, and the analysis of the system, several alternatives are possible. The best solution will probably be a combination of several alternatives based upon further study, feasibility, and cost effectiveness over the life of the project. Although transporting and treating the extra flow may be a good short term solution, the cost of pumping, maintenance and treatment need to be considered. How large of a pipe or storage tank is big enough is another important question? How intense will the next storm be? If the choice is to eliminate the inflow at its source, then how willing are the residents ready to cooperate? No matter what solution seems best, it will be important to hold public information sessions to obtain more information from the local residents. Elimination of foundation drains and yard improvements can be done over time and in small amounts, but a sewer replacement or pump station improvement would be best done all at one time. Therefore, the work plan should include further study and analysis to obtain the best solution for the residents of the City of North Olmsted. Dover Pump Station Service Area Overview The Dover Pump Station Service Area is located north of Lorain Road and bounded on the east by Walter Road, on the north by Westlake, and on the west by Westlake and the Bradley Woods Reservation (see Exhibit 5). Within this service area, there are approximately 2,450 homes, a Recreation Center, a Senior Center, a Community Center, three (3) schools and several apartment buildings and/or businesses. Based on the Ohio EPA Flow Guide, the estimated Residential Equivalent Units (REUs) are approximately 2,700. The Dover Pump Station is located on Dover Road near the Westlake Corporation line and receives influent from a 15-inch trunk sewer to the east and a 21-inch trunk sewer to the west. The ground generally slopes north from Lorain Road at elevation 760 to the Dover Pump Station at elevation 730; however, there are many flat areas that are at elevations of 735 to 740. The soils are similar to the LeBern Service Area. The Blossom Blvd. area west of Dover Road is at an elevation of 725 to 730. In this system, Blossom Blvd. was one of the problem areas. Many of the other reported sanitary sewer problems were scattered throughout the system and seemed to be located near the low points in the storm water system. The sanitary sewer records indicate that a layer of rock at 10-15-feet deep throughout the area. The local sanitary sewers have been installed above the rock in most areas, but the trunk lines have been laid in or just above the rock layer. Larger diameter pipes at minimum grades have been constructed to provide the necessary design capacity for the system. Some of the homes in the Dover Service Area were built in the 1950's and `60's when connecting foundation drains to the sanitary sewer was a widespread and common practice. In this area, there were some small wastewater package plants that were abandoned in the 1960's. The newer homes have sump pumps installed for the foundation drains, but it is unclear 14