Mowat Construction Company: Projects
- Alaska
- Washington
- Fremont Bridge
- Newport Way to I90 Widening
- Green River Bridge
- Snohomish Machias Bridge
- Sauk River Bridge Replacement
- York Bridge Replacement
- Aurora Bridge
- Edgewick Bridge Replacement
- SR 16, Union to Jackson Steel
- High Bridge Replacement
- Nuclear Fuel Canister Storage Building
- SR 16, Sprague to Snake Lake
- Meydenbauer Bridge Replacement
- I-5, 2nd St. Bridge
- SR 16, Union to Jackson
- York Bridge Superstructure
- Seattle Freeway Park
- Seattle Westlake Park
- Weller Street Elevated Pedestrian Walkway
- Eastgate Transit Access
- Seatac South 160th St. Loop
- Oregon
- Idaho
- Nevada
- Alaska
Mowat Construction Company: Projects
High Bridge #115 Replacement
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| Client/Owner: | Whatcom County |
| Location: | Lake Whatcom, WA |
| Cost: | $4,600,000 (Total Contract Value) |
High Bridge #115 is located in a picturesque setting east of Bellingham along Lake Whatcom Boulevard. The existing concrete bridge had been in service since 1946, and spanned a very steep ravine above the shores of Lake Whatcom. An unstable rock slope at the north abutment had failed several times over the years, and had been the cause of several emergency repairs. The project required removal of the existing 120’ three-span bridge, extensive rock excavation and stabilization, and then replacement with a new, 230’ two-span curved steel girder structure. Mowat was successful on the project largely due to the innovative plan to excavate the two center pier shafts using unconventional methods. Mowat hoisted a small excavator into the ravine to build a pad, then subcontracted drilling of multiple small holes to ‘swiss-cheese’ the shaft area. The excavator was then able to use a hydraulic hammer to remove the rock a foot at a time.