Blackman_* dam
Blackman_*
Blackman_* is a federal-owned dam located in Mesa, Colorado, along the Cottonwood Creek. Built in 1911 for the primary purpose of recreation, this Earth-type dam stands at a height of 22 feet with a maximum storage capacity of 90 acre-feet. With a significant hazard potential, the dam has a spillway width of 12 feet and a maximum discharge of 15 cubic feet per second.
Despite its age, Blackman_* has not been rated for its condition assessment and lacks updated emergency action plans. The risk assessment for the dam is moderate, highlighting the need for risk management measures to ensure the safety of downstream communities and the surrounding environment. As a significant water resource in the area, Blackman_* serves as a reminder of the importance of maintaining and monitoring aging infrastructure to mitigate potential risks and ensure sustainable water management practices 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 Blackman_* -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Creek At Upper Station | 12 cfs | → |
| Surface Creek Near Cedaredge | 35 cfs | → |
| Surface Creek At Cedaredge | 40 cfs | → |
| Plateau Creek Near Cameo | 42 cfs | → |
| Colorado River Near Cameo | 3,450 cfs | → |
| Colo River Blw Grd Valley Div Nr Palisade Co | 1,940 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Blackman_*.
Boat launches
- Ward Lake Boat Access - Grand Valley Rd
- Lakeshore Drive Delta County
- Z Road Delta County
- Big Creek Reservoir Boat Launch Grand Valley Rd
- Forest Road 121 Mesa County
- State Highway 65 25261, Delta County
Campgrounds
- Collbran - Cottonwood Lake
- Cottonwood Lake Campground - Grand Valley Rd
- Carp Lake
- Cobbett Campground - Grand Valley Rd
- Ward Lake Campground - Grand Valley Rd
- Ward Lake
Fishing spots
- Cottonwood Lake #1 (Grand Mesa)
- Cottonwood Lake #4 (Grand Mesa)
- Neversweat Reservoir
- Silver Lake (Grand Mesa)
- Hotel Twin Lake
- Forty Acre Lake
Paddle runs
- Gunnison River Segment 2
- West Fork Terror Creek
- Roubideau Creek Segment 2
- Deep Creek
- The Painted Wall To The Black Canyon Gunnison National Monument-Gunnison Gorge Wilderness Boundary
- Roubideau Creek Segment 1
More reservoirs
Track Blackman_* 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 Blackman_*
Where does the data for Blackman_* 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 Blackman_*.