Dam Report

Lake Patricia Dam dam

Arkansas, USA Mc Henry Creek Trib Hazard Significant
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Tonight low
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Dam height
27ft
Hazard rating
Significant
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Lake Patricia Dam -- None dam
Lake Patricia Dam None · Mc Henry Creek Trib
About this dam

Lake Patricia Dam

Lake Patricia Dam, located in Pulaski County, Arkansas, is a private-owned structure primarily used for recreation. Completed in 1946, this earth dam stands at a height of 27 feet and has a hydraulic height of 25 feet, with a maximum storage capacity of 197 acre-feet. The dam, situated on McHenry Creek Tributary, covers a surface area of 14.4 acres and services a drainage area of 0.2 square miles.

Managed by the Arkansas Natural Resources Commission (ANRC), Lake Patricia Dam is regulated, permitted, inspected, and enforced by the state agency. Although the condition assessment is currently labeled as "Not Rated," the dam's hazard potential is considered significant. Despite lacking certain emergency preparedness measures like an Emergency Action Plan (EAP) and inundation maps, the dam has not been modified since its completion and has not experienced any major incidents. With its picturesque location in the city of Little Rock, Lake Patricia Dam is a popular spot for outdoor enthusiasts and visitors looking to enjoy the recreational opportunities provided by the reservoir.

StateNone
River / streamMc Henry Creek Trib
NID IDAR00119
Owner typePrivate
Primary purposeRecreation
Dam typeEarth
Year built1946
Dam height27 ft
Dam length552 ft
Max storage197 AF
Normal storage162 AF
Surface area14.4 ac
Drainage area0.2 sq mi
Hazard potentialSignificant
ConditionNot Rated
Last inspectionTue, 01 Sep 2015 00:00:00 GMT

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.
Detailed forecast

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.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

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.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Lake Patricia Dam -- inflows here typically show up in storage 24-72 hours later.

Track Lake Patricia 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.

FAQ

About Lake Patricia Dam

Where does the data for Lake Patricia 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.

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