US Bridges

Blankenship Rd. over Boulder Creek

Good

Tillamook County, Oregon · Blankenship RD MP 0.42 · Structure no. 23307 000 00042

Built
2018
7 years old
Condition
Good
inspected June 2023
Type
Slab
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
84
2020 count
Owner
County
County Highway Agency

About this bridge

Blankenship Rd. over Boulder Creek is a prestressed concrete slab carrying Blankenship Rd. over Boulder Creek in Tillamook County, Oregon. It was built in 2018, so it is 7 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 84 vehicles a day, projected to reach 99 by 2025. The structure is 66 ft (20 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesBlankenship Rd.
CrossesBoulder Creek
LocationBlankenship RD MP 0.42
RouteCounty Highway C0000
CountyTillamook County
StateOregon
Coordinates45.2825, -123.75167
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
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 geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.4 US tons
Inventory rating38.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length66 ft (20 m)
Longest span66 ft (20 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic84 (2020)
Projected traffic99 by 2025
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Blankenship Rd. over Boulder Creek built?

It was built in 2018, making it 7 years old in 2025.

What condition is Blankenship Rd. 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 Blankenship Rd. over Boulder Creek carry?

About 84 vehicles per day (2020 count).

How long is Blankenship Rd. over Boulder Creek?

The structure is 66 ft (20 m) long with a longest span of 66 ft (20 m) and a deck 28 ft wide.

Who owns Blankenship Rd. over Boulder Creek?

It is owned by the County Highway Agency.