Description
The City of Auburn is soliciting a contractor to fully remove the historic Littlefield concrete dam and an upstream remnant dam on the Little Androscoggin River, and to restore the channel and riparian habitat. The scope includes mobilization, site access development, temporary water‑control structures, demolition of concrete and rock structures, erosion‑ and sediment‑control installation, ledge modification, fabric‑slope protection, and extensive native‑plant re‑vegetation with a three‑year maintenance warranty. Work must conform to stringent environmental permits (USACE Section 404, ME DEP, historic/archaeological safeguards) and is limited to an in‑water window of July 15 – September 30 2026. The contract is unit‑price based with a 5 % bid bond and 100 % performance/payment bonds, and liquidated damages apply for schedule overruns.
• Complete demolition of Littlefield Dam (≈ 3,500 CY concrete) and upstream remnant dam.
• Install temporary diversion, de‑watering, turbidity curtains, and sediment controls per Maine BMPs.
• Perform channel re‑grading, ledge modification, and fabric‑slope protection.
• Restore access roads, plant native trees, shrubs, live stakes, and seed wetland/conventional mixes; provide 3‑year plant‑maintenance plan.
• All work must occur within the July 15‑Sept 30, 2026 in‑water window and meet federal and state permitting conditions.