Aquatic Vegetation and Algae Control Services for

The Department of the Interior Bureau of Indian Affairs Northwest Region seeks aquatic vegetation and algae control services for the Flathead Indian Irrigation Project, with quotes due August 10, 2026 at 12:00 PM PDT. The procurement is a total small business set-aside; an amendment issued August 5 changed the set-aside status from Indian Economic Enterprise (IEE) sole source to 100% small business, and extended the due date accordingly.

Place of performance is the Flathead Indian Irrigation Project in Saint Ignatius, Montana, managing approximately 1,300 miles of canals, laterals, and drains. The period of performance runs August 17 through October 15, 2026. The NAICS code is 541620, Environmental Consulting Services; PSC is F999, Other Environmental Services.

The contractor must employ Montana-licensed aquatic pesticide applicators with minimum five years of herbicide and algaecide application experience, demonstrated expertise with metered injection systems, and prior treatment of algae, pondweed, and invasive species including Eurasian Watermilfoil and Curlyleaf Pondweed. Equipment must include calibrated metering devices, flow-adjustable pumps, and systems capable of maintaining target concentrations across flows of 1 to 400 cubic feet per second. Approved chemicals are limited to Teton Aquatic Herbicide & Algaecide (EPA# 70506-175), Argos or equivalent 9% Copper Herbicide & Algaecide (EPA# 81927-53), and copper sulfate pentahydrate. The contractor must comply with OSHA, Department of Interior, EPA label requirements, and all applicable Federal, Tribal, and State of Montana regulations, and bears full responsibility for spill containment, cleanup, and incident reporting. Response time requirements include acknowledging requests within one business day and mobilizing within five calendar days of authorization; Priority Treatment Areas require 24-hour notification response and 72-hour mobilization. Offerors must submit DIAR 1452.280-4 confirmation of small business status and Attachment 3 IA—IEE Representation Form with their quotes. The contracting officer is Brian Roberts.