Jefferson County Open Space (JCOS) in collaboration with Denver Water and Jacobs Solutions implemented a process-based restoration project along Casto Creek in 2023.

This project took place on two JCOS properties, Beaver Ranch Park and Reynolds Ranch Park. Its objectives were to reduce sediment supply in the North Fork of the South Platte River by implementing low-technology, process-based techniques to retain sediment and restore the natural function of Casto Creek and its surrounding floodplain habitat. Additionally, the project aimed to enhance plant community health and diversity while increasing habitat complexity within Casto Creek and the adjacent wetlands.

For this trip, attendees will visit two JCOS properties (Beaver Ranch Park and Reynolds Ranch Park) and learn about the collaboration, implementation, and monitoring of the project.

Hazards: May include walking on uneven ground, stream crossing (potential to get wet and dirty), heat or cold temperatures, and encountering wildlife (potential moose encounters).

Field Gear: Long-pants, sturdy closed-toed shoes (waterproof recommended), sunscreen, water and water bottle, snacks, hat and sunglasses.

Detailed Description

This field trip will showcase a collaborative project between Denver Water, Jacobs Solutions, and Jefferson County Open Space (JCOS), focusing on improving watershed health and resilience. The small-scale (~10 acres) initiative aims to reduce sediment supply in the North Fork of the South Platte River, which feeds into Strontia Springs Reservoir. The project seeks to minimize, retain, and stabilize sediment sources in Casto Creek and use low-tech, process-based techniques that do not require heavy machinery. These efforts are designed to restore the creek’s geomorphic functions, floodplain connectivity, and adjacent habitats, while also improving plant community health and native species diversity. Restoration treatments include post-assisted log structures, woody debris jams, and willow planting. The project began in fall 2023, with monitoring and maintenance expected for the next 5-10 years. Monitoring efforts will involve maintaining structures, groundwater well monitoring, vegetation assessments, photo-point monitoring, and tracking bird and herpetofauna community changes.