Petit Jean Water Supply dam
Petit Jean Water Supply
Petit Jean Water Supply, located in Petit Jean State Park in Conway, Arkansas, is a vital water source in the region. The dam, completed in 1959, stands at 29 feet tall and spans 600 feet in length, with a storage capacity of 210 acre-feet. The primary purpose of this gravity dam is to supply water to the surrounding area, with a normal storage capacity of 90 acre-feet and a drainage area of 0.2 square miles.
The dam on Cedar Creek-OS is regulated by the Arkansas Natural Resources Commission (ANRC) and is subject to state permitting, inspection, and enforcement. Despite its significant hazard potential, the dam's condition is currently not rated, with its last inspection conducted in November 2010. While no emergency action plan (EAP) has been prepared or updated for the dam, it remains a crucial water resource for the community, with a maximum discharge capacity of 1600 cubic feet per second.
Water resource and climate enthusiasts can appreciate the importance of the Petit Jean Water Supply dam in providing essential water supply services to the area. The dam's infrastructure and regulatory oversight ensure the safety and reliability of this critical resource, making it a cornerstone of water management in Conway, Arkansas.
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 Petit Jean Water Supply -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Fourche Lafave River Near Aplin | 106 cfs | → |
| West Fork Point Remove Creek Near Hattieville | 67 cfs | → |
| Maumelle River At Williams Junction | 0 cfs | → |
| Alum Fork Saline River Near Reform | 1 cfs | → |
| Lake Maumelle At State Hwy 10 Near Wye | 293 cfs | → |
| Illinois Bayou Near Scottsville | 121 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Petit Jean Water Supply.
Boat launches
- Lake Front Drive Illinois Township
- Wildlife Observation Trail Pope County
- Yellow Mtb Trail Faulkner County
- Piney Bay Campground Johnson County
Campgrounds
Fishing spots
Paddle runs
- Headwaters Sec 2, T2n, R18w To Forest Road 132c
- Forest Road 132c To Forest Raod 179
- Forest Road 179 To East Line Of Nw 1/4 Sec 22, T2n, R17w
- East Line Of Nw 1/4, Sec 22, T2n, R17w To West Line Of Sec 26, T2n, R17w
- Lake Winona Dam To Southern Line Of Sec 16, T2n, R17w
- Headwaters Sec 2, T1n, R20w To Sec 7, T1n, R19w
Track Petit Jean Water Supply 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 Petit Jean Water Supply
Where does the data for Petit Jean Water Supply 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 Petit Jean Water Supply.