Grosse dam
Grosse
Grosse, also known as Murphy Creek, is a private water resource located in Marinette, Wisconsin, designed by the USDA NRCS. This dam, completed in 1970, serves primarily for recreational purposes, with a modest height of 18 feet and a storage capacity of 80 acre-feet. The dam spans 480 feet and has a maximum discharge rate of 240 cubic feet per second. While it has a low hazard potential and fair condition assessment, it is regulated by the Wisconsin Department of Natural Resources, with regular inspections and enforcement measures in place.
Situated in the Detroit District, Grosse offers a serene escape for water and climate enthusiasts in the area. With its uncontrolled spillway type and relatively small drainage area of 2 square miles, the dam provides a peaceful setting for outdoor activities. The dam has a moderate risk assessment rating, indicating a level of caution, but overall, it remains a safe and well-maintained water resource for the community. The last inspection in June 2018 showed no major concerns, and the dam continues to be monitored to ensure its continued integrity.
Despite its private ownership, Grosse contributes to the local environment and economy by offering recreational opportunities in the heart of Marinette, Wisconsin. With its picturesque location and moderate risk profile, this dam serves as a valuable asset to the region, providing a source of enjoyment for residents and visitors alike. As climate change and water resource management become increasingly important topics, Grosse stands as a testament to the importance of sustainable and well-regulated water infrastructure in maintaining a healthy and vibrant community.
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 Grosse -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Peshtigo River At Porterfield | 965 cfs | → |
| Peshtigo River At Peshtigo | 1,340 cfs | → |
| Oconto River Near Oconto | 1,100 cfs | → |
| Oconto River Near Gillett | 678 cfs | → |
| Peshtigo River Near Wabeno | 384 cfs | → |
| Menominee River Near Mc Allister | 2,840 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Grosse.
Boat launches
- Murphy Lake -- Access At E Side Of Lake
- Bass Lake -- Access At The End Of 10th Rd
- Nelligan Lake -- Access Nr W 18th Rd
- Town Of Beaver
- Montana Lake -- Access At Fishery Area 12th Rd
- Rost Lake -- Access
Campgrounds
- Veterans Memorial Park - Crivitz
- Twin Bridge County Park
- Green's Green Acres Campground
- Old Veterans Lake County Park
- Old Veterans State Camp Ground
- Governor Thompson State Park Campground
Fishing spots
Paddle runs
- Sec 12/13 Line, T35n, R16e To Forest Boundary In Sec 24, T35n, R16e
- Confluence With Armstrong Creek To Sec 12/13 Line, T35n, R16e
- 1/4 Mile Upstream From Evans Bridge To Confluence With Armstrong Creek
- 1/4 Mile Downstream From Ccc Bridge To 1/4 Mile Upstream From Evans Bridge
- Railroad Bridge To 1/4 Mile Downstream From The Ccc Bridge
- Main Branch-Forest Boundary In Sec 18, T37n, R15e To Railroad Bridge
More reservoirs
Track Grosse 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 Grosse
Where does the data for Grosse 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 Grosse.