Jim Donchess
Mayor e City of Nashua
To: Board of Aidermen
Filed With: Patricia Piecuch, City Clerk
From: Jim Donchess
Date: June 12, 2017
Re: Emergency Sewer Repair Gilman Street
Pursuant to 5-90 (G) of the NRO, | have authorized emergency repair of a broken sewer line on Gilman
Street. The repair will be performed by Crisp Construction of Nashua, NH in an amount of $38,700.
By way of background this is an 18 inch line (installed in 1920) that carries a substantial amount of
constant sewage flow. The flow comes from several streets to the west of the breakage and
includes flow from St Joseph’s Hospital. With a break in the pipe, the sewage flow quickly backs up
as far back as toilets inside homes and businesses. The sewage did back up inside the residence of
29 Sawyer St from which we received a complaint. Without prompt action, the back-up could
affect many more addresses. Another emergency condition with this broken sewer main is the
stability of the road itself. As expected with sewer main breakages, the soil between the broken
pipe and the surface of the road begins to wash away inside the pipe. in this case, the void in the
soil under the pavement is six feet in diameter and four feet deep. Leaving the void there could
result in a collapse of the road pavement.
The contracted work involves excavation down to expose the broken sewer main (approximately
12 feet deep), repairing the main as well as two sewer service connections (66 Gilman St and 61
Gilman St) which collapsed along with the problematic main, backfilling and restoring the road. It
includes setting up pumping hoses to facilitate temporary sewer bypass pumping, providing a
temporary air plug at the upstream MH (Sawyer St at Gilman St) to allow for the bypass of the flow
and maintenance of traffic during the work (setting up cones, etc.).
Attached are copies of the invoices for this work which was completed over a three day period (May 17 thru
May 19). Funds are available in the Wastewater Operating Budget Sewer Maintenance account.
Thank you,
cc: DPW Administration
229 Main Street « PO Box 2019 * Nashua, New Hampshire 03061-2019
603.589.3260 * fax 603.594.3450 * NashuaMayor@NashuaNH.gov
www.NashuaNH.gov
