US Bridges

Blaine Road over Nestucca River

Fair

Tillamook County, Oregon · 03.5 Miles East Beaver · Structure no. 11381A858 00371

Built
1983
42 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Prestressed Concrete
Length
138 ft
1 main span
Daily traffic
1,061
2020 count
Owner
County
County Highway Agency

About this bridge

Blaine Road over Nestucca River is a prestressed concrete tee beam carrying Blaine Road over Nestucca River in Tillamook County, Oregon. It was built in 1983, so it is 42 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,061 vehicles a day, roughly 15% of them trucks, projected to reach 1,246 by 2025. The structure is 138 ft (42.1 m) long and 31 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

CarriesBlaine Road
CrossesNestucca River
Location03.5 Miles East Beaver
RouteCounty Highway A0722
StateOregon
Coordinates45.27944, -123.7588
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length138 ft (42.1 m)
Longest span135 ft (41.1 m)
Deck width31 ft (9.4 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,061 (2020)
Projected traffic1,246 by 2025
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Blaine Road over Nestucca River built?

It was built in 1983, making it 42 years old in 2025.

What condition is Blaine Road over Nestucca River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does Blaine Road over Nestucca River carry?

About 1,061 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Blaine Road over Nestucca River?

The structure is 138 ft (42.1 m) long with a longest span of 135 ft (41.1 m) and a deck 31 ft wide.

Who owns Blaine Road over Nestucca River?

It is owned by the County Highway Agency.