Marshall dam
Marshall
Marshall, also known as Beulah, is a local government-owned dam located in Brighton, Adams County, Colorado. Completed in 1904, this earth dam stands at a height of 26 feet and spans 547 feet in length, serving primarily for flood risk reduction purposes. The dam has a storage capacity of 98 acre-feet and a spillway width of 92 feet to manage maximum discharges.
Despite its age, Marshall has been well-maintained and is in satisfactory condition, with a low hazard potential and a moderate risk assessment rating. The dam underwent modifications in 2005 for hydraulic and structural improvements to enhance its resilience and performance. With its strategic location on the Brantner Gulch-TR, Marshall not only serves as a crucial flood protection structure but also provides recreational opportunities for the community.
Managed by the Colorado Division of Water Resources, Marshall is subject to state regulations, inspections, and enforcement to ensure its safety and functionality. The dam has a designated emergency action plan, though details on its preparedness and adherence to guidelines are yet to be confirmed. Overall, Marshall represents a significant infrastructure asset in the region, showcasing the importance of proactive risk management and maintenance practices for water resource and climate enthusiasts to appreciate and learn from.
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 Marshall -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| South Platte River At Henderson | 181 cfs | → |
| First Cr Ab 96th Ave | 1 cfs | → |
| Big Dry Creek At Westminster | 1 cfs | → |
| Clear Creek At Mouth | 3 cfs | → |
| South Platte R At 64th Ave. Commerce City | 95 cfs | → |
| Sand Crk Abv Burlington Ditch Nr Commerce City | 9 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Marshall.
Boat launches
- Brighton
- Adams County
- West 69th Avenue 4700, Westminster
- Standley Lake Trail Westminster
- Ralston Creek Trail Arvada
- Lagerman Trail Boulder County
Campgrounds
- Standley Lake
- Tipi Village
- St. Vrain State Park
- Union Reservoir
- Boulder County Fairground
- Cherokee Group Site
Fishing spots
- Marshall Reservoir
- Talbott Irrigation Reservoir
- Adams County Fairground Lakes
- Hunters Glen Lake
- Thornton Rec Ctr Lake (Carpenter)
- Elaine T. Valente Open Space
Paddle runs
- Lower Boulder Canyon
- Golden Whitewater Park
- Tunnel 1 To Golden Whitewater Park
- Idledale To Morrison
- October Hole
- Black Bear Hole & A-Hole
More reservoirs
Track Marshall 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 Marshall
Where does the data for Marshall 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 Marshall.