Resources · Reports

Scientific Studies & River Reports

A decade of UMOWA-commissioned research — water quality, bug-life, vegetation, restoration, and more. Searchable, downloadable, and organized by program.

Browse the report archive

Every UMOWA-commissioned study, organized by program. PDFs are linked directly — hit any report to read or download.

Aquatic Plant Project Report
Studies identifying and documenting aquatic plant life from Holter Dam to Cascade.
  • Spring 2020 Missouri River Aquatic Plant Study (Submersed Aquatic Vegetation Survey, 2019 field season)
  • 2019 Mile 1 Bathymetry Map
  • 2019 Mile 2 Bathymetry Map
  • 2019 Combined Bathymetry Map
  • 2019 May Vegetation Map
  • 2019 August Vegetation Map
Macroinvertebrate Reports - Missouri River
Annual studies on the viability and health of insect life in the Missouri River.
  • Missouri River Bugs Newsletter 2026
  • 2020 Missouri River Macroinvertebrate Study
  • 2018 Missouri River Macroinvertebrate Study
  • 2015-2017 Baseline Macroinvertebrate Monitoring
Macroinvertebrate Reports - Smith River
Studies examining aquatic insect populations in the Smith River (2016, 2017, 2018, and 2024).
  • 2024 Smith River Open House Poster (2016-2024 Data Summary)
  • 2018 Smith River Macroinvertebrate Study
  • 2016-2017 Smith River Macroinvertebrate Study
Water Quality Reports
Analysis of the river's water quality and nutrient levels over time, every year since 2016.
  • 2025 Upper Missouri River Water Quality — September Sneak Peek
  • 2024 Upper Missouri River Water Quality — Sneak Peek
  • 2023 Missouri River Water Quality Report
  • 2023 Season Newsletter Update: Tracking the Water Quality Pulse
  • 2022 Missouri River Water Quality Report
  • 2021 Missouri River Water Quality Report
  • 2020 Season Newsletter Update: Nutrient Trends Slightly Better
  • 2018–2019 Missouri River Water Quality Report
  • 2017 Missouri River Water Quality Report
  • 2016 Missouri River Water Quality Report (baseline year)
Missouri River Island Reports
Annual invasive weed treatment reports for the Missouri River islands, prepared by West River Land Management.
  • 2025 Missouri River Island Report
  • 2024 Missouri River Island Report
  • 2023 Missouri River Island Report
Weed Management, Biocontrol & Monitoring
Biological control monitoring, revegetation trials, and treatment plans behind the Invasive Plant Project.
  • UMOWA Weed Management Program — Bluebird Drive
  • 2025 UMOWA SIMP Report (Leafy Spurge Biocontrol Monitoring)
  • 2024 Smith River Biocontrol & Island Monitoring Trip Report (USFS)
  • 2024 Bioassay Report & Native Seed Mix Proposal
  • 2021 UMOWA Weed Management Summary Map
Weed Education & Grant Presentations
Integrated weed management education, plus annual hearing presentations for the Noxious Weed Trust Fund grants.
  • 2026 Noxious Weed Educational Gathering Presentation
  • 2026 UMOWA NWTF Hearing Presentation
  • 2025 UMOWA NWTF Hearing Presentation
  • 2024 UMOWA NWTF Hearing Presentation
  • 2023 UMOWA NWTF Hearing Presentation
  • 2022 UMOWA NWTF Hearing Presentation
Streambank & Other Reports
Streambank erosion assessments and other scientific reports.
  • BEHI Streambank Erosion Overview
  • Great Backyard Bird Count 2025
Montana Fish, Wildlife, and Parks Fish Study
Collaborative studies with MT FWP on trout populations.
  • 2020 Craig and Cascade Trout Population Estimate Figures

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