Webb #1 dam
Webb #1
Webb #1, also known as Elizabeth Reservoir, is a private dam located in Cascade County, Montana, near the city of ULM. The dam was completed in 1962 and serves the primary purpose of flood risk reduction along the Little Muddy Creek. It is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is subject to state permitting, inspection, and enforcement to ensure its safety and compliance with regulations.
This earth dam stands at a height of 15 feet and has a length of 375 feet, with a storage capacity of 50 acre-feet. Despite its low hazard potential, the dam's condition assessment is currently listed as "Not Rated," indicating a lack of recent evaluation. There is no Emergency Action Plan (EAP) prepared for the dam, and other risk management measures and assessments are also not available. It is important for water resource and climate enthusiasts to keep an eye on the maintenance and safety of Webb #1 to prevent any potential risks or hazards associated with its operation.
Overall, Webb #1 is a crucial infrastructure for flood risk reduction in the area, but its lack of recent assessments and emergency preparedness raise concerns about its safety and management. It is essential for relevant authorities and stakeholders to prioritize the evaluation and maintenance of the dam to ensure its continued functionality and safety for the surrounding community and environment. Water resource and climate enthusiasts should advocate for the proper monitoring and upkeep of dams like Webb #1 to prevent any potential disasters and protect valuable water resources.
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 Webb #1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Missouri River At Cascade Mt | 3,530 cfs | → |
| Sun River Near Vaughn Mt | 1,120 cfs | → |
| Sun River At Simms Mt | 1,030 cfs | → |
| Muddy Creek At Vaughn Mt | 87 cfs | → |
| Missouri River Near Ulm Mt | 4,040 cfs | → |
| Smith River Near Eden Mt | 434 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Webb #1.
Boat launches
- Old Us Highway 91 Cascade County
- Big Bend Boat Ramp
- Cascade County
- Lowry Bridge
- River Drive South 814, Great Falls
- Beartooth Road Lewis And Clark County
Campgrounds
- American Legion/Lions Park - Cascade
- Pelican Point Fas
- Prewett Creek Fas
- Mountain Palace Fas
- Lowry Camp Site
- Lowry Bridge
Fishing spots
Paddle runs
- Tenderfoot Creek, Sec. 30, T14n, R4e To Deep Creek, Sec. 31, T16n, R4e
- Falls, Sec. 25, T14n, R4e To Smith River, Sec. 25, T14n, R3e
- Headwaters, Sec. 13, T18n, R10w To Forest Boundary, Sec. 6, T17n, R7w
- Missouri River
- Hauser Dam, Sec. 29, T12n, R2w To Cochran Gulch, Sec. 18, T12n, R2w
- Town Of Nelson, Sec. 12, T12n, R2w To Missouri River, Sec. 19, T12n, R2w
More reservoirs
Track Webb #1 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 Webb #1
Where does the data for Webb #1 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 Webb #1.