Sunrise Lake Culvert Modification and Stormwater Control Project, Middleton, NH

The Strafford Regional Planning Commission (SRPC) is seeking construction services for the Sunrise Lake Culvert Modification and Stormwater Control Project located in Middleton, New Hampshire, within Belknap County. The Request for Bids (RFB) DES 2026-02 outlines a comprehensive project involving site preparation, culvert modification, and stormwater management improvements. Specific deliverables include removing approximately 64 linear feet of existing 24-inch CMP culvert, replacing 16 linear feet, and daylighting 48 linear feet as a natural channel, along with constructing Rain Garden #1 and a 4-foot riprap swale. Sealed bids must be submitted by February 6, 2026, at 5:00 p.m., with a public bid opening scheduled for February 9, 2026, at 3:00 p.m. at the SRPC office. The project has a strict completion deadline of May 15, 2026, with anticipated construction lasting 3 to 5 days, and will require a pre-construction meeting involving the contractor, SRPC, project engineer, NHDES, and Town of Middleton staff.

The project is partially funded through a New Hampshire Department of Environmental Services grant using Clean Water Act Section 319 funds from the U.S. Environmental Protection Agency. Contractors must provide proof of liability insurance with minimum coverage of $1,000,000 per occurrence and $2,000,000 aggregate for bodily injury/death, and $500,000 for property damage, along with workers' compensation insurance within five days of bid award. Payment will be distributed on a percentage-of-completion basis: 20% for site preparation, 35% for culvert construction, 30% for rain garden and swale construction, and 15% for site restoration. All payment requests must be submitted by June 30, 2026, with a 60-day payment term following invoice receipt. Additional improvements such as construction of Rain Gardens #2 and #3, stone swales, curb replacement, and boat ramp stabilization may be funded if budgets allow. The total project budget is not explicitly stated, but the comprehensive scope suggests a significant infrastructure investment for stormwater management and environmental improvement.