Watershed information & resources  for work & play

River Data

One of the most fascinating aspects of rivers is how much they change — in terms of flow, form, and wildlife. If you are looking for current stream flow, historical data or future projections, check out the following sites:

Northwest River Forecast Center (NWRFC) provides an overview of hydrologic conditions for the entire area at a glance. Click on any station for more details

  • NWRFC Marys River Station provides current and predicted stage (water level) and discharge (the volume of flow per second) for an approximately 10-day moving window, along with historical high and low flow data for that date. This site also provides local weather forecasts and links to related information. The station PHI03 is the Marys River at Bellfountain Road, and the station COR03 is the Willamette River at Corvallis

USGS Bellfountain Gauging Station provides 6-day graphs of stage and discharge, updated about every four hours in summer and hourly in winter. There is about an hour lag time from gauge recordings to website. Data at this site provide maximum, minimum, 25%, 50% and 75% percentile discharge for the day, based on almost 60 years of data.

Water Quality

The City of Corvallis Public Works and the City of Philomath Public Works both draw water from the Marys River in order to service both municipal areas.

About 1/3 of Corvallis’s drinking water and all of Philomath’s water supply comes from the Marys River and its tributaries.

Learn more about where your drinking water comes from:

Learn more about the Oregon State University nitrate well water testing program.

Interested in getting your drinking water tested? At the following link, the Oregon Health Authority lists  ORELAP accredited labs that test drinking water and accept public samples. Lab fees will be associated with this testing.

See something fishy (not in a good way!)? Report a problem:

Philomath Public Works – Report a Problem 

City of Corvallis Public Works – Report a Problem


Our current restoration projects are focused on the following sub-basins and areas:

  • Wren (prairie habitat improvement)
  • Beaver Creek
  • Woods Creek
  • Greasy Creek
  • Oak Creek
  • Upper and Mid Marys River
  • TumTum River (including Shotpouch Creek)

If you live in one of these areas and are interested in working to improve fish and wildlife habitat and water quality, please call us at 541-758-7597.

We are not able to respond to all landowner queries regarding watershed habitat issues due to funding constraints.  Benton Soil and Water Conservation District may be able to address your concerns.


In response to the COVID-19 pandemic, we have gathered some educational resources for those that want to stay connected to natural resource materials and lessons during this uncertain time. They are sorted by topic.

For a list of additional resources, visit our  blog post about our response to COVID-19.

  1. Use the  Bird Cams from Cornell Lab 
  2. Have students pick a bird cam (live or recorded) and use the  Cornell BirdSleuth Explorer’s Guidebook  to describe the bird 
  3. Use pages 8 and 9 of the guidebook to identify and describe the bird
  4. Then have students pick another bird cam and identity and describe that bird
  5. Compare and contrast the two bird species: How are they similar (size, color, beak shape, habitat) and how are they different? 
  6. Online Bird Games from Cornell Lab 
  7. Explore a range of online games about birds designed for students of different ages 
Aquatic Macroinvertebrates
  1. Coloring and activity book on aquatic macroinvertebrates from Utah State University:  Bugs Don’t Bug Me 
  2. Video on identifying aquatic macroinvertebrates and how macros are used as indicators for water quality from Ohio University 
  1. PBS video on beavers 
  2. Reflection questions to ask students before watching video: 
  3. What do you already know about beavers? 
  4. What do they eat? 
  5. Where do they live? 
  6. What do they build? 
  7. Reflection questions to ask after watching the video: 
  8. How do beavers eat sugar? 
  9. Why are beaver teeth orange? 
  10. What materials do beavers use to build their dams? 
  11. What are some benefits of beaver dams?
  12. BBC video on beavers
  13. National Geographic Fact Sheet on Beavers
  14. Spanish and English Beaver video with activities from PBS
  1. Native plants  coloring sheets from the US Forest Service 
  2. Parts of a flower worksheet:  answer guide and  fill in the blank
  3. Parts of a flower video
  1. Explore National Parks with a virtual guided tour  

Reports, Studies & Assessments

Strategic Plans

Marys River Watershed Council Strategic Plan 2019 – 2023

Marys River Watershed Council Strategic Plan 2017-2021

Marys River Model Watershed Proposal and Action Plan, 2010-2019

In 2003, Marys River Watershed Council developed an Action Plan to prioritize conservation action across the watershed. Although it was superceded by the Marys River Model Watershed Proposal and Action Plan (2010) and an organizational Strategic Plan (2011), the 2003 document still contains relevant information.The Cutthroat Trout Habitat Suitability Index (Map 1) was especially important; it has determined the priority order in which we have addressed sub-basin rapid bio-assessments and restoration action.

  • Watershed Council Action Plan
  • Map 1 (Cutthroat Trout Habitat Suitability Index, 1990)
  • Map 2 (Cutthroat Trout Habitat Suitability Index, 1850 estimate)
  • Map 3 (% Closed Forest Cover within 30 meter riparian area, 1990)
  • Map 4 (% Natural Vegetation within 30 meter riparian area, 1990)
  • Map 5 (Wetlands larger than 0.5, ha1990)
  • Map 6 (Wetlands larger than 0.5, 1850 estimate)
  • Map 7 (Migratory Waterfowl Habitat — ducks & geese, 1990)
  • Map 8 (Migratory Waterfowl Habitat — ducks & geese, 1850 estimate)
  • Map 9 (Songbirds, 1990)
  • Map 10 (Songbirds, 1850 estimate)
  • Map 11 (Wildlife Species of Concern, 1990)
  • Map 12 (Wildlife Species of Concern, 1850 estimate)
  • Map 13 (% Consumption of Natural Streamflow, 1990)
  • Maps 14 – 17 (Agriculture, Natural Vegetation, Built, Prime Farm Land, 1990)
  • Map 18 (Restoration Screening Map, 2003)