Lady Emma is a privately-owned dam located in Natrona, Wyoming, along Brush Creek. Built in 1917 for irrigation purposes, this Earth-type dam stands at a height of 23 feet and has a storage capacity of 52 acre-feet. With a low hazard potential and moderate risk assessment, Lady Emma plays a crucial role in providing water for irrigation, fire protection, stock, and small fish ponds in the area.

Managed by the Wyoming State Engineer's Office, Lady Emma undergoes regular inspections and enforcement to ensure its structural integrity and safety. With a spillway width of 27 feet and a maximum discharge capacity of 906 cubic feet per second, the dam is equipped to handle potential flooding events. Despite its age, Lady Emma continues to serve the community effectively, highlighting the importance of proper maintenance and regulation for water resource management in the region.

As a significant piece of infrastructure in the Sacramento District, Lady Emma stands as a testament to early 20th-century engineering and the ongoing importance of water resource management in Wyoming. With its historical significance and functional role in providing essential water services, this dam serves as a reminder of the intricate relationship between human development, climate challenges, and sustainable water use practices.