The team from the Woodmont Commons Planned Unit Development (PUD) has presented its conceptual plans for water, sewer and ancillary utilities. Development team member Joe Ducharme told the Planning Board at its Wednesday, May 22 meeting that water would be coming from Lake Massabesic in Manchester, supplied by Manchester Water Works and distributed by Pennichuck Water Works.
Public Service Company of New Hampshire (PSNH) will provide power, Liberty Utilities will provide natural gas, Comcast will be the cable and internet provider, and Fairpoint will provide landlines. Utility corridors will follow the development’s road network.
He said that the traditional separation between water and sewer is 10 feet and that they would look to maintain that. Ancillary utilities would also follow the road network.
“Londonderry has a requirement for new development for underground utilities, and we understand that would apply to this development,” he said, noting utilities will be placed underground.
Ducharme said that the existing sanitary sewer system in Londonderry, particularly in the southeastern part of the 600-plus acre project, would be served by gravity and would be connected to existing gravity sewers. He said there are three existing pump stations: the Action Boulevard pump station that serves the east side of Interstate 93, the Charleston pump station, and the Tokanel pump station, the latter privately owned but pumping sanitary waste to the Charleston station. He said the Charleston stations pumps all of the wastewater to the Derry wastewater facility, which has a reserve capacity of 864,225 gallons per day and can treat up to 2 million gallons per day, with a permit capacity of 4 million gallons per day. He said currently 91,400 gallons per day are pumped from the Charleston station to Derry.
Ducharme said that the current municipal agreement has an established capacity of 200,000 gallons per day. “So Londonderry already has a 200,000 gallon capacity in line at the Derry wastewater facility and is adding 91,400 gallons per day, so there is a net difference there of over 110,000 gallons per day,” Ducharme said.
He said pipes would have to increase in size, with 15- to 18-inch sewer pipe recommended at the current conceptual size. “We would have to see as we get into the planning and site development phase,” he said. He also noted the Action Boulevard pump station has a limited capacity, and if all development of Woodmont Commons were to happen on the east side of I-93, upgrades would be necessary at that pump station.
Board member John Laferriere asked how it worked with the Derry facility when more capacity is added. Ducharme said that the cost would go up. “So there’s potential with this project going in that fees will go up for those that are currently on sewerage,” Laferriere said.
“There’s a possibility of that,” Assistant Director of Public Works John Trottier said. He said the town only pays for the capacity it uses. “When you increase the number of users, you are also increasing the dissemination of that increase,” board member Mary Wing Soares said.
Board member Tom Freda asked if the rate were locked in for the life of the contract and Trottier said it was, noting it is a 20-year contract.
Ducharme said there may be a need, according to Pennichuck Water, for a water tank to maintain water pressure. Such a tank could be above or in the ground. TEC Engineer James D’Angelo added that a water storage tank would benefit the whole town, not just the development.
Resident Ann Chiampa had a concern with such a tower’s placement on high ground and said the cemetery on Hovey Road was on the highest point. “I’d hate to see a huge water tank next to the cemetery,” she said. She also asked, if such work included residents of other areas of town, whether those people impacted could be treated as abutters.
Resident Joe Maggio asked if the construction of pipes would impact residents on wells and Ducharme said he didn’t know if there would be any effect on wells. Maggio’s concern was for blasting in the area and Chairman Art Rugg noted there were protocols and state regulations regarding blasting and its effects on abutters.
Resident Mary Tetreau had a concern with costs and tax increases and was told those questions would be addressed at the fiscal impact portion of the briefings. Project developer Mike Kettenbach said the project development team pays for the sewer, water and gas as part of the cost of a development.
Resident Ray Adams asked about emails being sent to each of the board members and whether they were public record. Rugg said everything was done publicly and questions should be directed to Acting Town Manager William Hart.