This project included the stabilization of a section of shoreline along the Salmon River in Idaho, where years of icy flows had caused the streambank to erode.  DJ&A was tasked with the development of range of alternatives to stabilize the stream and improve the surrounding roadway.

DJ&A performed the site survey, including all bathymetric work, and completed preliminary and final designs for stabilization.  A low water terrace using a combination of riprap and vegetation plantings were used to provide protective measures along the river bank for approximately 600 feet.

Key Services

• Conducted topographic and bathymetric survey and mapping
• Produced minor roadway design to reconfigure existing road to accommodate stabilization structures
• Designed streambank stabilization structures to withstand ice flows typical of the project area
• Designed revegetation with native plants
• Developed construction documents for preferred alternative

Value Added

Special consideration was given to protect the integrity of the Salmon River by requiring that contractor equipment be cleaned using special methods to ensure that invasive aquatic species were not introduced into the project area.