Grohs Reservoir dam
Grohs Reservoir
Located in Klamath, Oregon, Grohs Reservoir is a private-owned water storage facility primarily used for irrigation purposes. The reservoir, completed in 1959, spans an impressive length of 2250 feet, with a dam height of 14 feet and a hydraulic height of 11 feet. With a maximum storage capacity of 882 acre-feet and a surface area of 99 acres, Grohs Reservoir plays a crucial role in supporting agricultural activities in the region by providing a reliable water source from Rock Creek.
Despite its low hazard potential and the absence of a spillway, Grohs Reservoir is subject to state regulation, inspection, and enforcement by the Oregon Water Resources Department. The reservoir's outlet gates are equipped with a slide (sluice gate) for water release, and it is situated within close proximity to Bonanza, Oregon. With a drainage area of 10.2 square miles and a maximum discharge of 241 cubic feet per second, Grohs Reservoir serves as a vital component of the local water resource infrastructure, contributing to the sustainable management of water in the area.
In the event of an emergency, the reservoir's Emergency Action Plan (EAP) status remains unreported, and risk assessment and management measures are yet to be detailed. Despite these gaps, Grohs Reservoir continues to fulfill its role in supporting irrigation activities and maintaining water security in the region. As a significant water resource infrastructure in Klamath County, Oregon, the reservoir stands as a testament to the importance of efficient water management practices in the face of evolving climate challenges.
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 Grohs Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Pit R Nr Canby Ca | 2 cfs | → |
| Link River At Klamath Falls | 1,440 cfs | → |
| North Canal At Highway 97 | 30 cfs | → |
| Klamath Straits Drain Near Worden | 1 cfs | → |
| Ady Canal At Highway 97 | 39 cfs | → |
| Klamath River At Keno | 1,110 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Grohs Reservoir.
Boat launches
- Willow Valley
- Willow Valley Reservoir Boat Ramp
- Barnes Valley
- Dog Lake Campground
- South Gerber Campground
- Heart Lake Landing
Campgrounds
Track Grohs 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 Grohs Reservoir
Where does the data for Grohs 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 Grohs Reservoir.