Hanna Lagoon (Cell 1 & 2) dam
Hanna Lagoon (Cell 1 & 2)
Hanna Lagoon (Cell 1 & 2) is a water resource located in Carbon County, Wyoming, with a primary purpose designated as 'Other'. Constructed in 1988, this Earth-type dam stands at 8 feet high and spans a length of 3900 feet, with a maximum storage capacity of 61 acre-feet. The lagoon is regulated by the State of Wyoming and is subject to regular inspections, with the last assessment conducted in July 2017 revealing a fair condition. Despite its low hazard potential, a high risk assessment has been assigned to Hanna Lagoon, indicating potential vulnerabilities that require attention.
The dam's location within the drainage of Big Ditch Creek ensures its significance in managing water resources and climate impacts in the region. The structure, designed by Paul McCarthy, features a stone core and a soil foundation, with two controlled outlet gates for water release. The absence of a spillway suggests a unique design that requires careful monitoring and maintenance to uphold safety standards. As a Local Government-owned facility, Hanna Lagoon plays a crucial role in water management and flood control efforts, highlighting the importance of maintaining its infrastructure for sustainable water resource utilization.
With its strategic positioning and critical role in water management, Hanna Lagoon serves as a vital asset for Carbon County and Wyoming. The lagoon's fair condition assessment, coupled with a high-risk designation, underscores the need for proactive risk management measures to ensure its long-term functionality and safety. By staying vigilant in monitoring the dam's structural integrity and implementing necessary maintenance and emergency preparedness measures, stakeholders can safeguard this essential water resource against potential climate-related challenges and contribute to the resilience of the surrounding ecosystem.
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 Hanna Lagoon (Cell 1 & 2) -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Medicine Bow R Ab Seminoe Reservoir | 38 cfs | → |
| Pass Creek Near Elk Mountain | 149 cfs | → |
| L Medicine Bow R At Boles Spring | 10 cfs | → |
| N Platte Riv Ab Seminoe Reservoir | 1,640 cfs | → |
| Rock Creek Ab King Canyon Canal | 129 cfs | → |
| North Brush Creek Near Saratoga | 57 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hanna Lagoon (Cell 1 & 2).
Boat launches
- Shiners Point Road Carbon County
- East Allen Lake Boat Ramp
- Carbon County
- East Allen Lake Boat Launch
- Dugway Campground Boat Takeout
Campgrounds
- East Allen Lake Public Access - Wgf
- Dugway Campsite 1
- Dugway Campsite 2
- Dugway Campsite 3
- Dugway Campsite 4
- Dugway Campsite 5
Fishing spots
- Seminoe Reservoir
- East Allen Lake
- Saratoga Lake
- Dome Rock Reservoir
- Pathfinder Reservoir
- Wheatland Reservoir #3
Paddle runs
More reservoirs
Track Hanna Lagoon (Cell 1 & 2) 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 Hanna Lagoon (Cell 1 & 2)
Where does the data for Hanna Lagoon (Cell 1 & 2) 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 Hanna Lagoon (Cell 1 & 2).