West Arapahoe is a privately owned earth dam located in Jackson, Colorado, along the Arapahoe Creek. Built in 1951, the dam serves primarily for irrigation purposes, holding a maximum storage capacity of 730 acre-feet. With a structural height of 26 feet and a length of 430 feet, West Arapahoe is a crucial component in the local water management system.

Managed by the Colorado Division of Water Resources, West Arapahoe is regulated, permitted, inspected, and enforced by the state to ensure its safety and functionality. The dam is classified as having a low hazard potential and fair condition, with a moderate risk assessment rating. Despite its age, the dam has been deemed to meet guidelines for emergency action preparedness, although specific emergency management measures are not detailed.

The Sacramento District of the US Army Corps of Engineers oversees West Arapahoe, and with a maximum discharge capacity of 500 cubic feet per second, the dam plays a vital role in water resource management in the region. As an essential part of the local irrigation infrastructure, West Arapahoe contributes to sustaining agriculture and environmental sustainability in the area.