Halverson dam
Halverson
Halverson, also known as Gov. Dodge State Park, is a state-owned dam located in Iowa, Wisconsin. This recreational dam on TR-Twin Valley Lake serves as a popular destination for water resource and climate enthusiasts, offering a surface area of 10 acres and a maximum storage capacity of 125 acre-feet. With a hydraulic height of 26 feet and a structural height of 37 feet, Halverson stands at a height of 37 feet and spans a length of 450 feet.
Despite its low hazard potential, Halverson's condition assessment is marked as unsatisfactory, with the last inspection date recorded in November 2013. The dam is regulated by the Wisconsin Department of Natural Resources (WIDNR), with state permitting, inspection, and enforcement in place to ensure its safety and compliance. While the dam's emergency action plan status and risk management measures are not currently specified, its location in COX HOLLOW DAM NO. 2 under the jurisdiction of the St. Paul District suggests ongoing efforts to mitigate potential risks and ensure public safety.
For water resource and climate enthusiasts visiting Halverson, its scenic setting within Gov. Dodge State Park offers opportunities for recreation and exploration. As one of Wisconsin's state-owned dams, Halverson provides a tranquil escape for outdoor activities, while also highlighting the importance of maintaining and monitoring dam infrastructure to safeguard against potential risks and ensure the continued enjoyment of this natural resource for years to come. With a focus on safety and regulatory compliance, Halverson serves as a reminder of the delicate balance between human recreation and environmental stewardship in the management of 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 Halverson -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Black Earth Creek At Black Earth | 51 cfs | → |
| Wisconsin River At Muscoda | 10,400 cfs | → |
| East Br Pecatonica River Near Blanchardville | 183 cfs | → |
| Brewery Creek-Upstream Site-At Cross Plains | 2 cfs | → |
| Pecatonica River At Darlington | 242 cfs | → |
| Badger Mill Creek At Verona | 11 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Halverson.
Boat launches
- Twin Valley Lake Boat Ramp
- Cox Hollow Lake -- Access
- Mill Creek At Mill Rd
- Sneed Creek At High Point Rd
- Wisconsin River -- Pecks Landing
- Helen Lake -- Landing
Campgrounds
- Twin Valley Campground
- Governor Dodge State Park
- Governor Dodge State Park Campground
- Tower Hill State Park Campground
- Tower Hill State Park
- Blackhawk Lake Rec Area - Highland
Track Halverson 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 Halverson
Where does the data for Halverson 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 Halverson.