Located in Weld County, Colorado, Marshall #2 is a privately owned earth dam built in 1887 for irrigation purposes along the Little Thompson River. Standing at a height of 20 feet with a length of 900 feet, this historic structure has a storage capacity of 51 acre-feet and serves multiple functions including fire protection, stock watering, and small fish pond creation in addition to irrigation. Despite its age, Marshall #2 has a low hazard potential and has not been rated for its current condition.

While the dam has not been modified in recent years and lacks certain safety features like a spillway, it still plays a crucial role in water management in the area. The dam has a maximum discharge capacity of 315 cubic feet per second and is regulated by the Colorado Department of Water Resources. With a high risk assessment score of 2, there is a need for ongoing monitoring and potential risk management measures to ensure the safety and integrity of Marshall #2 for both agricultural and environmental purposes in the region.