Request for proposals to treat aquatic plants in Moses Lake.

2026 AQUATIC TREATMENTS REQUEST FOR PROPOSALS The Moses Lake Irrigation and Rehabilitation District (MLIRD) respectfully request cost proposals to survey & treat portions of Moses Lake within the District. This effort would inventory aquatic plants by species and coverage and make recommendations for a prioritized treatment plan for species not conducive to recreation or water intakes and/or detrimental to water quality. Contractors must have all applicable licenses for professional work of this nature in Washington State. The project would include the following: Survey work:  Must be consistent with WA State DOE Aquatic Plant Sampling Protocols; and  Requires previous experience identifying aquatic plants in similar waters & climates.  Contractor submitted & approved work plan based on survey(s) results. Survey & Application personnel should be familiar with Moses Lake water bathymetry. Treatment work:  MLIRD reserves final determination of contractor proposal or recommendations. Contractors should plan an estimated 400 acres which may include: Diquat; Aquathol; Procellacor; Alum.  Proposal should include application cost per acre.  Proposal should include total cost for chemicals per acre.  Selected Contractor will be responsible for generation of all mailing lists, mailed notices, posted signs & water testing, agency reporting & required notifications within  mile radius of work.  All chemicals used must be approved for aquatic use in WA State  Airboat STRONGLY RECOMMENDED for chemical application  Proof of $3,000,000 insurance required w/RFP, request Packet for more detail.  GPS equipment required to plot and track treatments  All personnel & equipment supplied by Contractor  Mechanical Harvesting will be performed by MLIRD Deliverables: 20 paper copies of a final report and a digital version in formats to be determined. Report to include:  Lake maps based on GPS data showing inventory findings w/work performed  Recommended prioritized treatment plan for undesirable species discovered in survey(s)  Native ArcGIS shape files of treatments preferred  Detailed Final Report provided by contractor Evaluation Factors for Proposal:  Aquatic Survey & Applicator experience in Washington State: 25 points possible  Neat, Comprehensive proposal: 25 points possible  Timelines defined to complete work and present deliverables: 25 points possible  References & Examples showing other Aquatic Survey work in WA State listed: 25 points possible  Cost: 25 points possible (firm with lowest cost proposal awarded 25 points). MLIRD reserves the right to reject any or all submittals for any reason or no reason, to waive insubstantial or immaterial informalities and select the RFP that in the selection teams judgment best serves the needs of MLIRD and the people we serve. MLIRD may, in its sole discretion, renew this contract/agreement in each of three subsequent years. All completed RFP documents should include proposed survey and treatment timeframes and must be received by MLIRD no later than Thursday - April 30, 2026, at 3:00 PM PST at 932 E Wheeler Rd, Moses Lake, WA 98837. Call MLIRD for Packet 509-765-8716 #04008/47462 Pub: April 1, 8 & 15, 2026