US Bridges

Blaine Road over Boulder Creek

Good

Tillamook County, Oregon · MP 4.14 Blane Road · Structure no. 21270 858 00414

Built
2009
16 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
92 ft
1 main span
Daily traffic
1,061
2020 count
Owner
County
County Highway Agency

About this bridge

Blaine Road over Boulder Creek is a prestressed concrete stringer/multi-beam or girder carrying Blaine Road over Boulder Creek in Tillamook County, Oregon. It was built in 2009, so it is 16 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,061 vehicles a day, roughly 15% of them trucks, projected to reach 1,246 by 2025. The structure is 92 ft (28 m) long and 37 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesBlaine Road
CrossesBoulder Creek
LocationMP 4.14 Blane Road
RouteCounty Highway A0722
CountyTillamook County
StateOregon
Coordinates45.28147, -123.75056
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.7 US tons
Inventory rating58.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length92 ft (28 m)
Longest span92 ft (28 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 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 closed0.6 mi (1 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 Boulder Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is Blaine Road over Boulder Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does Blaine Road over Boulder Creek carry?

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

How long is Blaine Road over Boulder Creek?

The structure is 92 ft (28 m) long with a longest span of 92 ft (28 m) and a deck 37 ft wide.

Who owns Blaine Road over Boulder Creek?

It is owned by the County Highway Agency.