Panama No. 1 - East, also known as Baller Lake or Swede Lake, is a private earth dam located in Boulder County, Colorado. Built in 1904 for irrigation purposes, this dam stands at a height of 46 feet with a maximum storage capacity of 6,979 acre-feet. It also serves recreational purposes, offering a surface area of 370 acres for visitors to enjoy.

Managed by the Colorado Department of Water Resources, Panama No. 1 - East is regulated and inspected regularly to ensure its safety and functionality. With a spillway width of 426 feet and a significant hazard potential, this dam presents a moderate risk level that is actively monitored and managed. Despite its age, the dam's condition assessment remains satisfactory, showcasing its ongoing viability in water resource management.

Located near Frederick, Colorado, on Boulder Creek, Panama No. 1 - East plays a crucial role in water storage and distribution in the region. As climate change continues to impact water resources, maintaining and monitoring this dam is essential for sustainable water management and resilience in the face of evolving environmental challenges.