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Annis is a privately owned irrigation dam located in Natrona, Wyoming, along Arkansas Creek. Completed in 1948, this earth dam stands at 25 feet high and has a storage capacity of 332 acre-feet. The dam serves the primary purpose of irrigation and has a spillway width of 12 feet. Despite its age, Annis is in fair condition with a low hazard potential, making it a crucial water resource for the surrounding area.
Managed by the Wyoming State Engineer's Office, Annis is regularly inspected with a frequency of 5 years to ensure its structural integrity. The dam has one slide gate for outlet control and a moderate risk assessment rating. With a drainage area of 0 square miles and a surface area of 26 acres, Annis plays a vital role in water management in the region, particularly in the city of Alcova. The dam's location in Congressional District 00, Wyoming, highlights its importance in water resource management at the federal level.
Overall, Annis represents a significant piece of infrastructure in Wyoming's water management system, providing crucial irrigation water and flood control along Arkansas Creek. With its stone core and soil foundation, the dam continues to serve its purpose effectively, meeting state regulatory requirements for inspection, permitting, and enforcement. As a key component of the Sacramento District's water infrastructure, Annis stands as a testament to the importance of sustainable water resource management in the face of changing climate conditions.
Year_Completed | 1948 |
Dam_Height | 25 |
River_Or_Stream | ARKANSAS CREEK |
Dam_Length | 130 |
Primary_Dam_Type | Earth |
Surface_Area | 26 |
Hydraulic_Height | 21 |
Nid_Storage | 332 |
Structural_Height | 25 |
Outlet_Gates | Slide (sluice gate) - 1 |
Hazard_Potential | Low |
Foundations | Soil |
Nid_Height | 25 |