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ARROWHEAD

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March 29, 2025


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Arrowhead, a privately owned dam located in Weld County, Colorado, serves the primary purpose of irrigation on the Ashcroft Draw river. Built in 1962, Arrowhead stands at a height of 30 feet with a structural height of 38 feet and a length of 1480 feet. The dam's maximum storage capacity is 365 acre-feet, with a normal storage level of 230 acre-feet and a surface area of 23 acres.

With a low hazard potential and a satisfactory condition assessment as of June 2015, Arrowhead has undergone structural modifications in 2004 to ensure its continued safety and functionality. The dam features an uncontrolled spillway with a width of 38 feet and a slide (sluice gate) outlet gate. While the risk assessment categorizes Arrowhead as moderate, the dam has not been assigned a Dam Safety Action Classification (DSAC) date, indicating a need for ongoing monitoring and risk management measures to ensure its resilience in the face of various hydrological challenges. For water resource and climate enthusiasts, Arrowhead presents a fascinating case study in the management and regulation of a vital water infrastructure in the American West.

Years_Modified 2004 - Structural
Year_Completed 1962
Dam_Height 30
River_Or_Stream ASHCROFT DRAW
Dam_Length 1480
Primary_Dam_Type Earth
Surface_Area 23
Hydraulic_Height 29
Drainage_Area 5
Nid_Storage 365
Structural_Height 38
Outlet_Gates Slide (sluice gate) - 1
Hazard_Potential Low
Foundations Soil
Nid_Height 38
       

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