Sherwood, also known as Nelson, is a private dam located in Larimer County, Colorado, near Fort Collins. Built in 1906, this Earth-type dam serves primarily for irrigation purposes along the Cache la Poudre River. With a height of 10 feet and a storage capacity of 466 acre-feet, Sherwood plays a crucial role in water resource management in the region.

Managed by the Colorado Division of Water Resources, Sherwood is classified as a state-regulated dam, subject to regular inspections and enforcement measures to ensure its safety and functionality. With a significant hazard potential and a satisfactory condition assessment as of November 2019, the dam is considered to pose moderate risk, prompting the need for ongoing risk management measures and emergency preparedness.

Despite its age, Sherwood continues to provide essential water storage and control along the Cache la Poudre River, contributing to the overall water supply and irrigation infrastructure in the area. As a key component of Colorado's water management system, Sherwood underscores the importance of maintaining and regulating dams to mitigate risks and safeguard water resources in the face of changing climate conditions.