Upper Long Lake Dam dam
Upper Long Lake Dam
Upper Long Lake Dam, located in Millville, Michigan, is a state-owned earth dam on the Abbott Drain. Built in 1992, this dam stands at a height of 7 feet with a hydraulic height of 5.3 feet, serving as a vital structure for water resource management in the region. With a normal storage capacity of 300 acre-feet and a maximum discharge of 310 cubic feet per second, the dam plays a crucial role in regulating water flow and preventing flooding in the area.
Despite its low hazard potential and satisfactory condition assessment, Upper Long Lake Dam is subject to periodic inspections every five years to ensure its structural integrity and operational efficiency. The dam's spillway, with a width of 26 feet, is uncontrolled, allowing for the safe release of excess water during peak flow periods. With a moderate risk assessment rating of 3, measures for risk management and emergency preparedness are continuously evaluated to mitigate any potential threats to the dam and surrounding communities.
Upper Long Lake Dam, nestled in the scenic landscape of Lapeer County, Michigan, stands as a testament to the importance of sustainable water resource management and climate resilience. As a key component of the region's infrastructure, this dam serves not only as a barrier against flooding but also as a symbol of the ongoing efforts to balance water conservation with environmental protection. Its role in safeguarding the local ecosystem and supporting the community's water needs underscores the interconnectedness of water resources and climate dynamics in shaping our shared future.
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 Long Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Farmers Creek Near Lapeer | 27 cfs | → |
| South Branch Flint River Near Columbiaville | 159 cfs | → |
| Flint River Near Otisville | 275 cfs | → |
| Kearsley Creek Near Davison | 39 cfs | → |
| Stony Creek Near Romeo | 13 cfs | → |
| East Pond Creek At Romeo | 14 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Upper Long Lake Dam.
Boat launches
- Long Lake, 204 Acres, Lapeer County
- Lake Nepessing, 414 Acres, Lapeer County
- Holloway Reservoir, 2000 Acres, Lapeer County
- Minnawanna Lake, Metamora Hadley State Park, Lapeer County
- Big Fish Lake, 105 Acres, Lapeer County
- Sawmill Lake Road Hadley Township
Campgrounds
- Old Family Camp Site - Not Rentable
- Elliott Family Camp - 17 Rv Sites
- Camporee Area
- Paul Bunyon
- Migisi
- Forester
Fishing spots
Track Upper Long Lake 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 Long Lake Dam
Where does the data for Upper Long Lake 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 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 Upper Long Lake Dam.