| Name | Location | Status | Design | Year Built | Year Lost | Span Length (ft.) | Total Length (ft.) |
|---|---|---|---|---|---|---|---|
| Beaver Creek Bridge | OR 47 over Beaver Creek | Open to traffic | Timber stringer | 1936 | -- | 29.0 | 89.9 |
| Beaver Creek Bridge | Kukkala Road over Beaver Creek | Replaced by new bridge | Warren pony truss | 1915 | 1998 | 48.0 | 48.0 |
| Beaver Creek Bridge | Old Hwy 30 over Beaver Creek | Open to traffic | Concrete tee beam | 1918 | -- | 34.1 | 35.1 |
| Beaver Creek Bridge | Beaver Falls Road (Old US 30) over Beaver Creek | Open to traffic | Concrete pony/through girder | 1918 | -- | 28.9 | 60.0 |
| Beaver Creek Bridge | Beaver Falls Road (Old US 30) over Beaver Creek | Open to traffic | Stringer | 1918 | -- | 35.1 | 69.9 |
| Beaver Creek Bridge | Beaver Falls Road over Beaver Creek | Open to traffic | Beam | 2008 | -- | 93.2 | 93.2 |
| Columbia & Nehalem River Railroad - Bridge No. 8 | Bridge on Columbia & Nehalem River Railroad | Destroyed by disaster | Timber stringer | 1913 | -- | -- | -- |
| Columbia & Nehalem River Railroad - Kerry Tunnel | Columbia & Nehalem River Railroad under | Collapsed | Tunnel | 1915 | -- | -- | -- |
| Columbia & Nehalem River Railroad - South Olsen Creek Trestle | Columbia & Nehalem River Railroad over South Olsen Creek | No longer exists | Timber stringer | 1913 | 1938 | -- | -- |
| Columbia & Nehalem River Railroad - US-30 and PNWR bridge | Columbia and Nehalem River Railroad over US-30 and PNWR | No longer exists | Timber stringer | 1913 | 1938 | -- | -- |
| Columbia River and Nehalem Valley railroad McBride Creek crib bridge | Bridge over McBride Creek | Demolished | Other | 1912 | -- | -- | -- |
| Crown Z Road Bridge | Scappoose-Vernonia over Crown Z Road | Open to traffic | Slab | 1963 | -- | 24.9 | 75.1 |
| East Fork Nehalem River, Scappoose Vernonia Rd | Scappoose Vernonia Road over East Fork Nehalem River | Replaced by a new bridge in 1952 | Pony truss | -- | 1952 | -- | -- |
| Elk Creek Bridge | Logging road over Elk Creek | Open to traffic, but access is blocked by a locked gate. | Slab | -- | -- | 100.0 | 100.0 |
| Ford Creek Bridge | OR 202 over Ford Creek | Replaced by a pre-cast girder bridge in 2006. | Timber stringer | 1934 | 2006 | 116.1 | 116.1 |
| Fox Creek Railroad Bridge | PNWR (formerly SP&S railroad) over Fox Creek | Open to authorized vehicles only | Other | -- | -- | 100.0 | 100.0 |
| J. P. West Road Bridge | J. P. West Road over South Fork Scappoose Creek | Open to traffic | Timber stringer | 1925 | -- | 17.1 | 49.9 |
| Lewis & Clark Bridge | WA 433 over Columbia River | Open to traffic | Pratt through truss | 1929 | -- | 1200.2 | 5478.3 |
| Lyons Creek Bridge | OR 202 over Lyons Creek | Replaced by a pre-cast concrete girder bridge in 2006 | Timber stringer | 1934 | 2006 | 94.2 | 94.2 |
| Magruder Bridge | Woodson Road/Watch Drive over Westport Slough | Open to traffic with a weight limit | Concrete tee beam | 1982 | -- | 29.9 | 315.0 |
| McDonald Bridge | Milton Way over Milton Creek | Replaced by a pre-cast concrete slab bridge in 2004 | Pony truss | 1914 | 2004 | 86.0 | 86.0 |
| Nehalem River Bridge | OR 47 over Nehalem River | Open to traffic | Parker through truss | 1938 | -- | 120.0 | 210.0 |
| Nehalem River Bridge | O Black Mnln over Nehalem River | Open to traffic | Slab | -- | -- | 150.0 | 150.0 |
| Nehalem River Bridge | Timber Road over Nehalem River | Open to traffic | Concrete stringer | 1973 | -- | 100.1 | 182.1 |
| Nehalem River Bridge (Old) | Bridge over Nehalem River | Replaced by a new bridge | Unknown | -- | 1973 | -- | -- |
| Nice Creek Viaduct | West C street over Nice Creek | Open to traffic | Concrete stringer | 1911 | -- | 40.0 | 243.1 |
| NP Goble-Kalama Ferry | Ferry over Columbia river | No longer exists | Ferry | 1884 | 1908 | -- | -- |
| PNWR - Clatskanie River Bridge | Portland & Western Railroad (PNWR) over Clatskanie River | Open to traffic | Warren through truss | 1897 | -- | 182.0 | 223.0 |
| PNWR - Scappoose Bay Bridge | PNWR RR over Scappoose Bay | Open to traffic | Unknown | 1958 | -- | -- | -- |
| Portland & Southwestern Railroad Tunnel | Portland and Southwest Railroad under | Derelict/abandoned; tracks removed around 1943 | Tunnel | 1910 | -- | -- | 1712.0 |
| Prescott Point Viaduct | Bridge on Former US 30 | Derelict/abandoned | Concrete tee beam | 1918 | -- | -- | -- |
| PWNR tide creek bridge | Bridge over Tide Creek | Open to traffic | Deck plate girder | -- | -- | -- | -- |
| Rock Creek Bridge | OR 47 over Rock Creek | Open to traffic | Concrete stringer | 1930 | -- | 55.1 | 139.1 |
| Rock Creek, Keasey Rd. | Keasaey Road over Rock Creek | Replaced by a new bridge in 1954 | Pony truss | -- | 1954 | -- | -- |
| Tide Creek Bridge | U.S. 30 Frontage Road over Tide Creek | Open to traffic | Stringer | 1920 | -- | 29.9 | 90.9 |
| Wesport Sough Bridge | Route 409 over Wesport Slough | No longer exists | Unknown | 1928 | -- | -- | -- |
| Westport Tunnel | under | Derelict/abandoned | Tunnel | -- | -- | -- | -- |
| Weyerhaeuser Peterson 2 Bridge | Bridge over Nehalem River | Open to authorized vehicles only | Steel stringer | -- | -- | -- | 60.0 |
| Yeon and Pelton incline | No longer exists | Timber stringer | -- | -- | -- | -- |