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ST9302-CS 940131To: From: Mayor and City Council Kenneth M. Griffin, P.E., City Engineer Discussion and consideration of allocating 1.6 million dollars for sanitary sewer improvements associated with the Sandy Lake Road Project from Denton Tap to MacArthur Blvd. Date: January 31, 1994 Discussion and consideration of allocating 1.6 million dollars for sanitary sewer improvements associated with Sandy Lake Road. As the Council is aware, there has been ongoing dialogue between the City of Coppell and the Municipal Utility District (MUD) concerning property on the south side of Sandy Lake which is currently served through the MUD. The property is not within the district. The MUD has recently completed a study to determine its ability to serve its current district and its ability to annex any additional property into the district. Based on the study, the current capacity of the system will be met or exceeded at build out of the district. Therefore, the MUD has stated that it will not be able to annex any additional land into its district. This has created a situation where there are parcels of land which cannot be served by City services or by the MUD. In an effort to resolve this problem, the City and the MUD have been meeting to look at several alternatives to determine if there is a solution to the problem. The City will be reconstructing Sandy Lake Road in the near future, therefore, the first option I explored was the potential of installing a sewer line in Sandy Lake Road from Heartz Road to the east side of MacArthur Blvd. This would intercept the flow south of Sandy lake and take it to the existing lift station on the east side of MacArthur Blvd. It was my opinion that there was some validity to a system in Sandy Lake Road, therefore, I asked Rady and Associates to determine if a system could physically be installed in Sandy Lake Road in conjunction with the existing utilities, proposed cuts, proposed utilities, etc. Rady and Associates examined the potential for a sewer line in Sandy Lake utilizing on the ground survey information they had obtained for the design of the roadway. Based on a preliminary look at the system, it appears that a 12" to 15" sanitary sewer line could be constructed in Sandy Lake Road. The sewer line would be able to take approximately 236 homes off the Heartz Road sewer line and approximately 275 homes off the Lodge Road sewer line. This removes a total of 511 homes off of north bound sewer lines that are already experiencing some capacity problems. It also takes the homes off of the Deforest Lift Station. This frees up additional capacity. Also, during the actual design of the sewer line, the City would be investigating if any of the property on the north side of Sandy Lake could be routed to flow south. There appears to be the potential to pick up approximately 100 homes on the north side of Sandy Lake immediately east of CiCi's Pizza. The concept of a sewer line in Sandy Lake Road was presented to representatives of the MUD. While representatives of the Mud were very receptive to a sewer line in Sandy Lake Road, the initial response was that while we are rerouting sewer and freeing up capacity in north bound lines and the Deforest Lift Station, ultimately we are not removing anything from the MUD but only rerouting it and discharging it back into the system at a different point. The point where we are discharging i.e. east of MacArthur at the Sandy Lake Lift Station, will also be experiencing some capacity problems in the near future. It was the opinion of the representatives of the MUD that if the City were to construct a sewer line in Sandy Lake Road it would have a positive impact on the MUD. However, it was their opinion that the City should also be responsible for some upgrades to the existing Sandy lake Lift Station and the existing force main heading south out of the lift station. The estimated cost of those improvements is approximately $500,000 to $600,000. The MUD is looking for a commitment from the City on both the Sandy Lake Road sewer line and improvements to the lift station and force main prior to the MUD being in a position to consider the annexation of any additional properties into their district. The funding for the one million dollars for the sewer line in Sandy Lake would need to be appropriated immediately so that the design can be incorporated into the design of Sandy l_ake Road. However, additional funds for the lift station and force main improvements would not have to be provided for approximately three to five years. The lift station and force main is currently operating at about 70 % capacity so it still has some useful life. Because there are several options to providing a benefit to the MUD, a meeting was scheduled with the MUD's engineer and the consultant that performed the recent system study and myself to discuss various alternatives for providing relief to the MUD System. My thought process was that if the City were in a position to commit approximately one million dollars to providing some relief to the MUD could the one million dollars be spent in a more productive manner i.e., reconstruction of north bound lines, capacity improvements at the DeForest Lift Station, enlargement of some lines leaving the lift station, etc. It was the opinion of the MUD that the best benefit to the MUD would be the construction of the sewer line in Sandy Lake Road. This would free up additional capacity for the lift station at Deforest and allow greater flexibility in allowing some of the land commonly referred to as Vista Ridge and/or the Magnolia Tract the opportunity to get into the lift station. It was quite obvious while discussing the layout of the MUD's system and their future plans as compared with the City's sewer master plan and our future plans that there needs to be some rapid coordination between the two entities. The City of Coppell will need to perform an update to our Impact Fee Schedule prior to November, 1994. When that study is authorized, there are several ways to approach the coordination from the two entities. Several issues discussed between the MUD representatives and myself was an adjustment of the MUD boundaries to allow some of the property north of Bethel Road and west of Coppell Road, to flow into a system that the City shows on our Master Plan already. That property naturally flows to the City's system, however, it is in the MUD. There was also discussion of whether or not a gravity system needs to be installed along the north bank of Denton Creek from the north city limits of Coppell to Sandy Lake Road. This system would collect Vista Ridge, the Magnolia property and some property west of Denton Tap. The MUD representatives were informed of approximately five parcels of property currently on the fringes of the MUD seeking to be annexed into the MUD. Those properties include the Barbara Austin property on Sandy Lake, Cambridge Estate on DeForest Road, Sonic Drive-In on Denton Tap, Rejoice Lutheran Church on Sandy Lake and a potential residential development at the northeast corner of Heartz Road and Sandy Lake. It was the opinion of the MUD representatives, that if the City committed to the Sandy l.ake Road sewer main and the future improvements to the lift station and force main at Sandy Lake and MacArthur, that the MUD would be in a position to consider some additional annexations into their district. In summary, staff is requesting that Council authorize the allocation of approximately one million dollars for a sewer main in Sandy Lake Road and instruct staff to negotiate with our current consultant for Sandy Lake Road, Rady and Associates, to bring forth an amendment to their contract to allow for the design of a Sandy Lake Road sewer system. Staff also requests that Council commit approximately $600,000 for future lift station and force main improvements for the system east of MacArthur Blvd. Staff will be available to answer any questions concerning this item.