Muddy Guard No. 2 South Dam

About Muddy Guard No. 2 South Dam

The primary purpose of Muddy Guard No. 2 South Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by North Fork Irrigation District (private). It impounds the Erosion Draw & Guard Draw near Arvada.

The dam stands 57 feet tall and stretches 1,600 feet across, creates a reservoir covering 48 acres, has a maximum storage capacity of 1,934 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1976, the structure is 50 years old.

This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 04/29/2024.

At 57 feet, this dam is taller than 95% of all dams in the United States.

Living Downstream

If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Wyoming dam safety program can provide more specific information about emergency planning for this structure.

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