SR 546 - Kamm Ditch - Fish Passage

Kamm Ditch, located at MP 4.21 on SR 546 near the intersection at Northwood Road in Lynden is a drainage channel that flows generally north to south under SR 546. The existing culvert is a reinforced concrete 6 feet by 4 feet box culvert with two wingwalls and extends beneath the highway approximately 33 feet. This project will improve fish passage by attaching four 9 feet by 11 feet winged walls to the precast culvert. The potential fish habitat gain from the removal of the old barrier is an estimated 3,094 feet. 

Why we are removing fish passage barriers

State highways cross streams and rivers in thousands of places in Washington State, which can impede fish migration. WSDOT has worked for nearly three decades to improve fish passage and reconnect streams to help keep our waterways healthy. WSDOT Fish Barrier Correction is a priority.