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E <br />pumps frequently must be replaced. While pumps can last up to 10 -15 years in good situations, we've found <br />that five years is more common for this type of use. These frequent replacements become expensive over <br />time. If the town agreed to service this property it would be replacing these pumps in perpetuity. <br />b. High maintenance and time consuming for staff. The pump stations require a lot of maintenance by a small <br />staff that have to physically inspect the site weekly and perform maintenance /tests weekly. <br />C. Negative downstream impacts. There are two pump stations downstream of the one proposed for this site. <br />This would create a chain of three pump stations in a row, before finally connecting to a gravity outfall. One <br />of the downstream stations has a generator, so the other station would need to have to a generator added to <br />ensure flow and avoid overflows during power outages. In addition, the concentration of hydrogen sulfide gas <br />from the long force main will have damaging downstream impacts to these other stations. This would require <br />epoxy coating the manholes and other preventive improvements now and that will have to be redone in <br />perpetuity. Staff is currently assessing what improvements might have to be made to ensure the stations could <br />handle the additional volume from this site. <br />d. Energy efficiency concerns. The pump station would use a lot of electricity and increase the use at the <br />downstream stations. The town has been steadily removing pump stations over the years and replacing them <br />with lines that simply use gravity to flow the sewage to the wastewater plant, where practical. Gravity lines <br />require no use of electricity, are far more reliable, especially during power outages, and require dramatically <br />less staff time to maintain. As a reference, while OWASA's system is many times largerthan Hillsborough, they <br />both have about the same number of pump stations. Part of this was due to less than ideal planning decades <br />ago and some topography. Therefore, adding a pump station would negatively affect the town's goal of going <br />carbon free by 2050 and 80% carbon free by 2030. <br />e. Reliability. Even with two pumps at a station and a stand -by generator, problems can occur, such as during a <br />storm and /or power outage that can cause a station to fail and overflow. This does not happen often, but it <br />does happen. <br />3. While this line is in Hillsborough's service area, it's outside the preferred area of service for both water and sewer. <br />The town board has been limiting growth, especially residential, north of 70 to: 1) minimize traffic impacts on Churton <br />Street; 2) conserve water and sewer capacity to ensure long -term compact development can be accommodated, and <br />3) minimize sprawl. The town board has turned down, formally and informally, multiple requests by developers to <br />serve medium to large scale residential projects in this area. Just a few months ago, the board heard a request from a <br />developer inquiring about service for a potential residential development on 80 acres, just southeast of the proposed <br />county facility. The board declined to provide utility service for this residential development, but did indicate a <br />willingness to consider an economic development related use. In addition, utilities service in this area is not included <br />in the town's water capacity analysis, therefore no water or sewer capacity is allocated for use in this area. <br />The consulting engineer appropriately mentioned during a recent meeting that the sewer line going from the site to <br />the town's system would open -up the possibility of serving the surrounding area. While this is true and would often <br />be a benefit, the town is not interested in future development in this area, at this time, as it's not in the land use plan <br />and for the reasons state above. <br />4. If this site is selected, the town and county would need to agree on a financial contribution to address to address <br />many of the aforementioned costs, as would be standard practice with any water and sewer extension agreement for <br />a development. The goal would be to minimize cost impacts on the town for at least 10 years, forthings such as pumps <br />3 <br />