US Bridges

Blue Mtn. Sta. RD over Couse Creek

PoorClosed to traffic

Umatilla County, Oregon · 1.5 MI E of HWY 11 · Structure no. 59C430062600205

Built
1951
74 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
63
2020 count
Owner
County
County Highway Agency

About this bridge

Blue Mtn. Sta. RD over Couse Creek is a steel stringer/multi-beam or girder carrying Blue Mtn. Sta. RD over Couse Creek in Umatilla County, Oregon. It was built in 1951, so it is 74 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 63 vehicles a day, roughly 10% of them trucks, projected to reach 73 by 2025. The structure is 33 ft (10.1 m) long and 20 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesBlue Mtn. Sta. RD
CrossesCouse Creek
Location1.5 MI E of HWY 11
RouteCounty Highway 0
StateOregon
Coordinates45.87058, -118.36791
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 15
Structure length33 ft (10.1 m)
Longest span31 ft (9.4 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic63 (2020)
Projected traffic73 by 2025
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Blue Mtn. Sta. RD over Couse Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is Blue Mtn. Sta. RD over Couse Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Blue Mtn. Sta. RD over Couse Creek carry?

About 63 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Blue Mtn. Sta. RD over Couse Creek?

The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.4 m) and a deck 20 ft wide.

Who owns Blue Mtn. Sta. RD over Couse Creek?

It is owned by the County Highway Agency.