Upper Constantine Dam dam
Upper Constantine Dam
The Upper Constantine Dam, located in Constantine, Michigan, was completed in 1903 and serves primarily for recreational purposes. Situated on the Fawn River, this gravity dam stands at a height of 12.8 feet with a spillway width of 80 feet. The dam has a storage capacity of 1,000 acre-feet and a normal storage level of 404 acre-feet, covering a surface area of 45 acres within a drainage area of 247 square miles.
Despite being privately owned, the Upper Constantine Dam is regulated by the Michigan Department of Environment, Great Lakes, and Energy (DEGLE) and undergoes regular inspections, with the last assessment in November 2018 rating its condition as fair. The dam's hazard potential is considered significant, with a moderate risk assessment. With its historical significance and recreational function, the Upper Constantine Dam is a vital part of the local water resource infrastructure in St. Joseph County, Michigan.
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 Upper Constantine Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| St. Joseph River At Mottville | 2,460 cfs | → |
| St. Joseph River At Three Rivers | 2,030 cfs | → |
| Pigeon River Near Scott | 367 cfs | → |
| Prairie River Near Nottawa | 122 cfs | → |
| St. Joseph River At Elkhart | 4,140 cfs | → |
| Elkhart River At Goshen | 620 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Upper Constantine Dam.
Boat launches
- Riverwalk Trail Three Rivers
- Jefferson Street Three Rivers
- Shafer Brothers Road 58679, Fabius
- Coon Hollow Road 11864, Fabius Township
- Fishing Site Road Fabius Township
- County Line Road 59998, Newberg Township
Campgrounds
- Wood Lake Scout Reservation
- Elkhart Co. / Middlebury Koa Holiday
- Nottawa Park
- Cade Lake County Park
- Elkhart County Fairgrounds
- Pigeon River State Fish And Wildlife Area
Fishing spots
Track Upper Constantine Dam 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 Upper Constantine Dam
Where does the data for Upper Constantine Dam 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 Upper Constantine Dam.