Orchard Reservoir Report
Last Updated: January 2, 2026
Orchard is a privately-owned irrigation dam located in Adair, Oklahoma, along the TR-Evansville Creek.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1970, this Earth dam stands at a height of 35 feet and has a length of 2830 feet, providing a storage capacity of 695 acre-feet and a surface area of 24 acres for water resource management. With a primary purpose of irrigation, Orchard plays a crucial role in supporting agricultural activities in the area.
Despite its importance, Orchard has been assessed to have a poor condition and a high hazard potential, warranting attention and potential rehabilitation to ensure its continued functionality and safety. The dam, regulated by the Oklahoma Water Resources Board, is subject to regular inspections and enforcement to uphold safety standards and mitigate risks associated with its operation. With a maximum discharge capacity of 3120 cubic feet per second and a controlled spillway, Orchard presents both opportunities and challenges for water resource and climate enthusiasts alike.
For water resource and climate enthusiasts, Orchard represents a significant infrastructure for water management in the region, demonstrating the intersection of human engineering with natural resources. Its location within the Little Rock District and its association with the TR-Evansville Creek highlight the interconnectedness of water systems and the importance of efficient irrigation practices in sustaining agricultural activities. As efforts are made to address the dam's poor condition and high hazard potential, stakeholders can work towards ensuring the long-term resilience and sustainability of Orchard for future generations.
Year Completed |
1970 |
Dam Length |
2830 |
Dam Height |
35 |
River Or Stream |
TR-EVANSVILLE CREEK |
Primary Dam Type |
Earth |
Surface Area |
24 |
Hydraulic Height |
35 |
Drainage Area |
0.24 |
Nid Storage |
695 |
Structural Height |
35 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Baron Fork At Dutch Mills
|
16cfs |
Caney Creek Near Barber
|
14cfs |
Baron Fork At Eldon
|
51cfs |
Little Lee Creek Near Short
|
6cfs |
Lee Creek At Short
|
9cfs |
Illinois River Near Tahlequah
|
362cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
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. Investigations and studies are necessary.
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.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams 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, environment 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.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Orchard
The State Line To The Mouth Of The River
Outh Of The River