Shelley dam
Shelley
Shelley is a privately owned dam located in Montague, California, along the Webb Gulch river. Completed in 1952, this earth dam stands at a height of 27 feet and has a storage capacity of 364 acre-feet, serving primarily for water supply purposes, including irrigation. With a drainage area of 4.31 square miles, Shelley plays a crucial role in managing water resources in the region, especially during times of high demand or drought.
Despite being privately owned, Shelley is regulated and inspected by the California Department of Water Resources (DWR) under the Safety of Dams program. The dam is in satisfactory condition, as assessed in September 2017, with a significant hazard potential. The last inspection took place in November 2020, and the dam is subject to regular inspections to ensure its structural integrity and safety. Located in Siskiyou County, Shelley not only provides essential water supply but also contributes to the overall water management strategy in the area, helping to mitigate risks associated with water scarcity and flooding events.
With its significant role in the water supply infrastructure of the region, Shelley stands as a testament to the importance of private ownership in managing water resources effectively. As climate change continues to impact water availability and quality, dams like Shelley play a crucial role in ensuring a reliable water supply for agricultural and municipal needs. Through regular inspections and regulatory oversight, Shelley remains a valuable asset in the management of water resources in California, highlighting the need for sustainable infrastructure development in the face of changing climate conditions.
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 Shelley -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Shasta R Nr Montague Ca | 69 cfs | → |
| Shasta R Nr Yreka Ca | 71 cfs | → |
| Klamath R Bl Iron Gate Dam Ca | 1,380 cfs | → |
| Klamath River Blw John C.Boyle Pwrplnt | 1,310 cfs | → |
| Scott R Nr Fort Jones Ca | 154 cfs | → |
| West Fork Ashland Creek Near Ashland | 4 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Shelley.
Boat launches
- A. Ash Creek River Access
- Driftwood Lane Siskiyou County
- Mountain Wood Drive 15182, Siskiyou County
- Siskiyou County
- B. Cayuse River Access
- C. Skeahan Bar River Access
Campgrounds
- Martins Dairy Campground
- Martins Dairy Horse Camp
- Tree Of Heaven
- Tree Of Heaven Campground
- Juanita Lake Campground
- Juanita Lake
Fishing spots
Paddle runs
- Shasta River
- Iron Gate Dam To Happy Camp
- Little Applegate River
- Headwaters In Marble Mtn. Wilderness To Wilderness Boundary
- Antelope Creek
- South Fork Little Butte Creek
More reservoirs
Track Shelley 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 Shelley
Where does the data for Shelley 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 Significant 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 Shelley.