M.M. Caldwell

Meridian Street Bridge (Pierce County, Washington)
Consulting engineer, 1925
Through truss bridge over Puyallup River on WA 167 in Puyallup
In storage

Pasco - Kennewick Bridge (Benton County, Washington)
Built 1922
Lost Cantilever through truss bridge over Columbia River on WA-397
Replaced by new bridge

Wishkah River Bridge (Grays Harbor County, Washington)
Consulting Engineer, 1925
Bascule bridge over Wishkah River on US 12 in Aberdeen
Open to traffic