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Proposed Project Team and Experience <br /> The force mains vary from 3.5 miles to 9.8 miles in length, from 10 <br /> c_ <br /> tt�, <br /> • � � _ may. <br /> to 18 inches in diameter, and are located primarily within the existing <br /> right of ways of state and county highways and township roadways.The <br /> total length of force main installed as art of the project is 27.2 miles. <br /> � p p J <br /> Wastewater flows and velocities were balanced with the pump selection <br /> Xitiesof Annandale,Maple Lake and wet well design.Three of the lift stations are designed with three <br /> &Howard Lake Wastewater `��°' <br /> Treatment Facility identical pumps. Each of the pumps are designed to meet normal flow <br /> 4 _ conditions and two pumps operate during peak flow periods. The third <br /> pump at each lift station serves as a back-up should any of the pumps <br /> fail.At the Howard Lake Lift Station, a four pump design was selected to <br /> minimize the operating horsepower on the average day. Two of the pumps <br /> are 250 H.P. and designed to move 2,150 gallons per minute. The other <br /> = f two pumps in the station are 88 HY and designed to move 1,600 gallons <br /> per minute.The controls systems at each of the stations are used to cycle <br /> ' l p__ LA a large flow at least once per day to flush the force main and minimize grit <br /> - accumulation. <br /> Wastewater Treatment Facility, Shakopee Mdewakanton Sioux <br /> Community (2006) <br /> Contact: Bill Rudnicki,Tribal Administrator, 952-445-8900 <br /> The Shakopee Mdewakanton Sioux Community worked with Bolton &Menk to implement a <br /> state-of-the-art sanitary wastewater treatment facility on trust lands to treat wastewater from all <br /> SMSC residences and Community enterprises located south of County Road 42. <br /> The wastewater facility design selected provides <br /> a small footprint with no open basins,enclosed <br /> in one building.With residential housing nearby, _- <br /> _�specific attention was given to containing noise <br /> and odors,while providing an aesthetically <br /> pleasing facility.After treatment,the effluent is _ ._77 , <br /> , <br /> directed into several wetlands. In the summer, <br /> the treated water is used to irrigate the golf <br /> course. In the winter,the treated waters flow <br /> north,eventually reaching the Minnesota River. <br /> The following wastewater treatment processes were implemented: screening and grit removal, <br /> parallel plate clarifiers,biological aerated filters (BAF),ultra membrane filtration and ultraviolet <br /> disinfection. The high degree of treatment facilitates the reuse of the effluent water for irrigation <br /> purposes and potentially groundwater recharge. <br /> BAF is a submerged media upflow filter that provides a biological conversion of organic matter <br /> and the physical capture of solids on media. It efficiently provides biological treatment in one- <br /> tenth of the space required by traditional U.S.wastewater processes and is considered the best <br /> system available today. The BAF system is also readily adaptable to influent load changes–an <br /> important consideration,given the wide variation in flow and loading from the casino gaming <br /> facility. <br /> Wastewater Treatment Facility Improvements I City of Elk River, Minnesota 8 <br />