Weaver Reservoir dam
Weaver Reservoir
Located in Yoncalla, Oregon, Weaver Reservoir, also known as Thurman-Weaver, is a privately owned water resource managed for irrigation purposes. Built in 1970, this earth dam structure stands at a height of 22 feet and has a storage capacity of 55 acre-feet, serving as a vital source of water for agricultural activities in the region. With a surface area of 9.95 acres and a maximum discharge capacity of 450 cubic feet per second, Weaver Reservoir plays a crucial role in sustaining the local ecosystem.
Managed by the Natural Resources Conservation Service, Weaver Reservoir is regulated by the Oregon Water Resources Department, ensuring state oversight and enforcement of safety standards. The dam's low hazard potential and not rated condition assessment indicate its stable operational status, providing a reliable water supply for the surrounding area. Despite its modest size, Weaver Reservoir's strategic location along Yoncalla Creek contributes to the overall water management infrastructure in Oregon, highlighting the importance of sustainable resource utilization in mitigating the impacts of climate change on water availability.
As a part of the larger water management system in Douglas County, Oregon, Weaver Reservoir serves as a testament to the collaborative efforts between private owners, state agencies, and federal partners in safeguarding water resources for irrigation and other essential purposes. With its consistent inspection schedule and adherence to regulatory guidelines, Weaver Reservoir stands as a model for responsible water resource management, showcasing the intersection of environmental stewardship, climate resilience, and agricultural sustainability in the Pacific Northwest.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Weaver Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Umpqua River Near Elkton | 2,000 cfs | → |
| Little Wolf Creek Near Tyee | 4 cfs | → |
| Coast Fork Willamette R Blw Cottage Grove Dam | 76 cfs | → |
| North Umpqua River At Winchester | 1,450 cfs | → |
| Row River Near Cottage Grove | 190 cfs | → |
| Little River At Peel | 2,120 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Weaver Reservoir.
Boat launches
Campgrounds
- Tyee Recreation Site
- Tyee - Sutherlin
- Eagleview Group Site
- Pass Creek County Park
- Primitive - Cottage Grove Lake
- Pine Meadows- Cottage Grove Lake
Track Weaver Reservoir in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Weaver Reservoir
Where does the data for Weaver Reservoir come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Low hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Weaver Reservoir.