Independence Watershed Aquatic Organism Passage Project

The Independence AOP Project aims to resolve issues at a low-water crossing over an unnamed creek upstream of Independence Creek in the Independence Watershed. This road is the main access route to Independence Lake, used by various stakeholders. The creek experiences high seasonal runoff, carrying debris and sediment worsened by vehicle traffic.

The project, developed by TRWC, Sierra County, and the USFS, aims to improve water quality and protect downstream habitats by installing an Aquatic Organism Passage (AOP) structure on a new road alignment. The design includes options for a three-span bridge or three steel multi-plate arch culverts to handle significant storm events. Preliminary studies were completed in 2016, and technical studies will be updated to advance the design. Funding will be used for engineering design work related to the project.

TMWA Benefit:

Priority II Watershed Improvements: The project will decrease sedimentation and help achieve the Total Maximum Daily Load (TMDL) pollutant targets for the Truckee River, as listed under section 303(d). The restoration efforts will enhance watershed function and aquatic habitat by reducing erosion and restoring sensitive ecosystems.

Priority V Support to Rehabilitation of Local Tributary Creeks and Drainage Courses: The project aims to restore a degraded roadway that contributes sediment to the Truckee River. Heavy vehicle traffic and the lack of a proper crossing cause significant sediment plumes, leading to erosion, increased sediment loads, elevated turbidity, higher water temperatures, and reduced dissolved oxygen levels. The proposed improvements will enhance water quality and aquatic habitat, improving watershed function and reducing sediment transfer to Independence Creek, the Little Truckee River, and the main stem of the Truckee River. This will result in measurable water quality benefits and improved ecological health of the watershed.

Priority VI Stewardship and Environmental Awareness: The project aims to engage community members through newsletters, email updates, and site tours to raise awareness about stream and habitat restoration, and water quality improvements. Key activities include leading tours, creating interpretive signage, and publishing articles. Volunteers will also participate in the annual Truckee River Day.