Bergen West, also known as Bergen #1, is a private dam located in Jefferson County, Colorado, near the city of Lakewood. Built in 1888 for irrigation purposes on the Weaver Gulch river, this earth dam stands at a height of 25 feet and has a storage capacity of 505 acre-feet. With a surface area of 34 acres and a maximum discharge of 2110 cubic feet per second, Bergen West plays a significant role in water resource management in the region.

Despite being a privately owned structure, Bergen West is regulated and permitted by the Colorado Department of Water Resources, with regular inspections ensuring its safe operation. The dam has a spillway width of 92 feet and is classified as having a significant hazard potential, although its overall condition is assessed as fair. In 2000, structural modifications were made to enhance the dam's safety and performance, reflecting a commitment to maintaining its integrity and functionality for the surrounding community.

With its historic significance and continued importance for irrigation and recreational purposes, Bergen West serves as a vital component of the local water infrastructure. As climate change impacts water resources, structures like Bergen West play a crucial role in managing and utilizing water sustainably, highlighting the intersection of water management and climate resilience in the region.