King - Ames Lake Road Bridge No.1320A
Project Number: 2319
From milepost 3.7 to milepost 3.78
RATA Funds: $2,888,900
Legislative District: 5
Status:
Date Approved: 2019
This project replaced 100-year-old Ames Lake Trestle bridge, which was constructed from creosote-treated timber. The new bridge maintains a vital link between the City of Carnation, protected agricultural areas, forest resource lands, and the state highway system. It is situated on a designated snow and ice removal route. Each day, the bridge supports approximately 1,800 vehicles, including around 70 trucks, and handles an estimated 300,000 to 4 million tons of freight annually.
The original structure had reached the end of its expected service life and was classified as structurally deficient, earning a sufficiency rating of just 36.76 out of 100. Its narrow width rendered it functionally obsolete. Additionally, required load restrictions caused heavy vehicles, including fire engines from nearby districts, to take a 13-mile detour route.
The new bridge removed polluting creosote-treated timber, eliminated emergency response and truck detours, and added shoulders to support nonmotorized travelers. It also upgraded guardrails to current safety standards and enhanced safety by improving the geometry and sightlines of the reverse curves leading to the bridge. The stream restoration added habitat features for migrating salmon which was observed being used shortly after the stream work was completed.
Residents commended our staff for their professionalism and friendliness during the bridge construction.
The original structure had reached the end of its expected service life and was classified as structurally deficient, earning a sufficiency rating of just 36.76 out of 100. Its narrow width rendered it functionally obsolete. Additionally, required load restrictions caused heavy vehicles, including fire engines from nearby districts, to take a 13-mile detour route.
The new bridge removed polluting creosote-treated timber, eliminated emergency response and truck detours, and added shoulders to support nonmotorized travelers. It also upgraded guardrails to current safety standards and enhanced safety by improving the geometry and sightlines of the reverse curves leading to the bridge. The stream restoration added habitat features for migrating salmon which was observed being used shortly after the stream work was completed.
Residents commended our staff for their professionalism and friendliness during the bridge construction.