Sewer Main Line Extension Agreement - St Joseph County

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Ms. Jessica Clark SJEC Cost Opinion & Sewer Analysis Page 3 1 September 21, 2015 DRAFT • Sanitary Sewer Master Plan I/N KOTE -- I/N TEK TIF District, Olive Township, St Joseph County City Project 96-27 by Ken Herceg & Associates, dated September 1996, revised April 1997. • Water and Sanitary Sewer master Plan Updates and Revisions SJC Economic Development District No. 2, by Ken Herceg & Associates, dated December 2001. • St Joseph Energy Center Exhibits 2, 3 and 4 (title of master document from developer unknown). • Infrastructure Improvements Map, St. Joseph County Economic Development District 2, by Donohue/Herceg dated September 26, 2013 titled Sanitary Sewer and Water, Sheet 1 of 1. Areas Included The area included in the analysis of the sewer sizes was limited to those areas in SJCEDD2 which could generally discharge into the Walnut Road sewer north of Edison Road, and then along US 20 from Smilax Road to Walnut Road. Refer to the attached Sanitary Sewer Sizing Review (Exhibit D) and the areas outlined in red for the parcels included in the analysis. The other changes made in the analysis since the Master Plan and Update included the addition of approximately 120 acres of undeveloped land located east of Walnut Road, north of Edison Road, west of the existing I/N TEK I/N KOTE plant, and south of the Railroad (area already owned by I/N TEK but could be used for expansion). This area could be tributary to the Edison Road sewer or the 20-inch I/N TEK sewer, however it should be noted that some of these facilities are currently near capacity. These areas were added to the analysis to offer maximum flexibility far future capacity balancing between the interceptors serving the area. One other item to note about the area of this analysis is that there is a higher than normal concentration of wetlands, power and pipeline right-of-way, railroads, regulated drains or other public right-of-ways. Generally there were no considerations made for the likely decreases in developable areas due to them; however, Areas I and O have much of their developable areas filled with these features which resulted in the reduction of potentially developable acreage by 50%. It should be noted that this reduced amount may still be an optimistic projection of developable area. In the other Areas, these same features (right-of-way, railroads, drains, etc.) certainly have an impact on the calculations, but are not likely to impact the results to the degree necessary that will change the sewer sizing recommendations. Given this, these features are neglected in the analysis of the other Areas for the sake of simplicity. MetliodoloU This analysis calculated a flow for each area identified in Exhibit D (attached), based on the number of acres in each area times a flow rate per acre. The flow rate utilized was 2,200 gpd/Ac, which is the same rate that was used for all previous analyses for SJCEDD2. Note that this flow rate was used for the sake of standard comparison with all previous analyses, whereas in reality, the figure is higher than most development types experience. However, if numerous high water demand industries locate within the SJCEDD2, then the figure of 2,200 gpd/Ac may not be high enough to represent the actual flow conditions. For example, the existing I/N TEK, I/N KOTE plant and the proposed SJEC flows exceed this