Frankfurth Marsh dam
Frankfurth Marsh
Frankfurth Marsh, located in Dodge County, Wisconsin, is a captivating part of the larger Horicon Marsh ecosystem. Owned and regulated by the Wisconsin Department of Natural Resources, this Federal fish and wildlife pond serves as a crucial habitat for a variety of species. Completed in 1994, the Earth dam stands at 7 feet tall, with a storage capacity of 2900 acre-feet and a surface area of 435 acres.
With a low hazard potential and a very high risk assessment rating, Frankfurth Marsh is closely monitored and inspected every 10 years. The controlled spillway design ensures proper water management, with a maximum discharge capacity of 81 cubic feet per second. Despite being not rated for condition assessment, the marsh continues to fulfill its primary purpose as a valuable fish and wildlife pond.
The marsh's location on the Rock River, under the jurisdiction of the Rock Island District, and its proximity to HORICON make it a key component of the region's water resource management. As climate change continues to impact water availability and quality, Frankfurth Marsh's conservation efforts play a vital role in maintaining a healthy ecosystem for future generations of water resource and climate enthusiasts.
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 Frankfurth Marsh -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Bark River At Nagawicka Road At Delafield | 41 cfs | → |
| Menomonee River At Menomonee Falls | 8 cfs | → |
| Fox River At Waukesha | 98 cfs | → |
| Little Menomonee River At Milwaukee | 19 cfs | → |
| Little Menomonee River Near Freistadt | 4 cfs | → |
| Underwood Creek At Wauwatosa | 8 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Frankfurth Marsh.
Boat launches
- Keesus Lake -- Access
- Beaver Lake -- Access At State Hwy 83
- Pine Lake -- Access
- Pewaukee Lake -- Village Launch (Off Park Ave.)
- Moose Lake -- Ramp
- Pewaukee Lake -- Access At End Of Lakeview Blvd Nr Cth Ss
Campgrounds
- Ledge County Park Campground
- Wild Goose City Park
- Derge Park
- Shelter #6
- Astico County Park Campground
- Shelter #1
More reservoirs
Track Frankfurth Marsh 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 Frankfurth Marsh
Where does the data for Frankfurth Marsh 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 Frankfurth Marsh.