Mrg1 dam
Mrg1
Mrg1 is a privately owned dam located in Gadsden, Florida, with a primary purpose of recreation. This Earth-type dam stands at 27 feet tall and stretches 1489 feet in length, creating a surface area of 96 acres and a storage capacity of 5427 acre-feet. Situated on an unnamed pond in MIDWAY, Mrg1 is regulated by the state of Florida and is subject to permitting, inspection, and enforcement requirements.
Despite its recreational focus, the hazard potential of Mrg1 is currently undetermined, with the dam's condition not yet rated. Emergency action preparedness and risk assessment measures have not been completed, suggesting a need for further evaluation and planning in case of potential hazards. The dam's location in the Savannah District means it falls under federal jurisdiction, but it is not operated or funded by any federal agencies.
Water resource and climate enthusiasts may be interested in monitoring the development and management of Mrg1, as it represents a potential recreational resource in Florida while also posing certain unknown risks that need to be addressed. The lack of comprehensive safety and emergency preparedness measures underscores the importance of conducting thorough assessments and implementing risk management strategies to ensure the dam's safety and the protection of surrounding areas in case of emergencies.
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 Mrg1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Ochlockonee River Nr Havana | 1,350 cfs | → |
| Ochlockonee River Nr Concord | 1,110 cfs | → |
| Little River Nr Quincy | 101 cfs | → |
| Little Attapulgus Creek At Attapulgus | 4 cfs | → |
| Little River Nr Midway | 55 cfs | → |
| Ochlockonee River Nr Bloxham | 1,730 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mrg1.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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More reservoirs
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About Mrg1
Where does the data for Mrg1 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 Undetermined 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 below 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.
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.