Hannah Mahoney No. 2, also known as Enl. of 824r, is a privately owned earth dam located in Muddy Gap, Wyoming. Built in 1909 for irrigation purposes, this dam stands at a height of 22 feet and has a length of 590 feet. It has a storage capacity of 107 acre-feet, with a normal storage level of 74 acre-feet, serving the local agricultural community in Carbon County.

Managed by the Wyoming State Engineer's Office, Hannah Mahoney No. 2 has been deemed to have a low hazard potential and fair condition. The dam features an uncontrolled spillway with a width of 50 feet and is equipped with a single valve outlet gate. Despite its moderate risk assessment, the dam has passed its last inspection in October 2021 and is subject to regular maintenance and monitoring to ensure its structural integrity and safety.

Located in a picturesque setting along Muddy Creek, Hannah Mahoney No. 2 plays a vital role in sustaining the region's water resources for agricultural use. With Liz Cheney (R) as the Congressional representative for the area, this dam serves as a testament to the importance of water management and conservation in the face of changing climates and growing water demands.