Arnold-armstrong Subwtrshd Gully 23

About Arnold-armstrong Subwtrshd Gully 23

The primary purpose of Arnold-armstrong Subwtrshd Gully 23 is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Monona County Swcd (local government). It impounds the Tr-maple River near Castana.

The dam stands 36 feet tall and stretches 470 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 35 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1961, the structure is well into its service life at over 50 years old.

This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 06/23/2022.

At 36 feet, this dam is taller than 83% of dams nationwide.

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