Ozark Lock And Dam dam
Ozark Lock And Dam
Ozark Lock and Dam, also known as Ozark Lake, is a federal-owned structure located in Dardanelle, Arkansas. Completed in 1969 by the US Army Corps of Engineers, this concrete gravity dam serves primarily for navigation purposes on the Arkansas River. With a dam height of 42 feet and a hydraulic height of 33 feet, this multi-arch dam spans 2,500 feet in length and has a storage capacity of 148,400 acre-feet.
While offering hydroelectric power generation, recreational opportunities, and navigation support, Ozark Lock and Dam also presents significant flood risk potential, as indicated by a very high risk assessment rating. The US Army Corps of Engineers actively manages these risks by implementing monitoring and maintenance measures, engaging with local emergency managers, and continually updating emergency action plans to ensure the safety and structural integrity of the dam. With a spillway width of 750 feet and one lock measuring 600 feet in length and 110 feet in width, Ozark Lock and Dam remains a critical infrastructure for water resource management in the region, supported by the dedicated efforts of the USACE.
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 Ozark Lock And Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mulberry River Near Mulberry. Ar | 563 cfs | → |
| Jack Creek Near Winfrey | 1 cfs | → |
| Frog Bayou At Winfrey | 20 cfs | → |
| Jones Creek At Winfrey | 17 cfs | → |
| Petit Jean River Near Booneville | 125 cfs | → |
| Arkansas River At Ft. Smith | 23,000 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Ozark Lock And Dam.
⚓ Boat launches
- Aux Arcade Park Road Ozark
- Cane Creek Recreation Road 2199, Logan County
- Spadra Park Boat Ramp
- Cove Lake Bathhouse Road Logan County
- County Road 539 Yell County
- Logan County
⛺ Campgrounds
- Aux Arc
- Citadel Bluff
- Dogwood Drive - Lake Eufaula State Park
- Horsehead Lake
- Horsehead Lake Recreation Area
- Vine Prairie
🎣 Fishing spots
More fishing →Track Ozark Lock And 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 Ozark Lock And Dam
Where does the data for Ozark Lock And 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 Ozark Lock And Dam.