US Bridges

Camp Morrison RD over Thomas Creek

FairPosted for load

Linn County, Oregon · 0007 MI S ST HWY 226 · Structure no. 12948 083000007

Built
1936
89 years old
Condition
Fair
inspected July 2024
Type
Truss - Thru
Wood or Timber
Length
153 ft
1 main span
Daily traffic
350
2021 count
Owner
County
County Highway Agency

About this bridge

Camp Morrison RD over Thomas Creek is a wood or timber truss - thru carrying Camp Morrison RD over Thomas Creek in Linn County, Oregon. It was built in 1936, so it is 89 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for other load-capacity restriction.

It carries about 350 vehicles a day, roughly 2% of them trucks, projected to reach 515 by 2041. The structure is 153 ft (46.6 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCamp Morrison RD
CrossesThomas Creek
Location0007 MI S ST HWY 226
RouteCounty Highway C0830
CountyLinn County
StateOregon
Coordinates44.71211, -122.71869
Functional classRural Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: 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 rating27.9 US tons
Inventory rating21.4 US tons

Structure

Structure typeTruss - Thru
MaterialWood or Timber
DeckWood or timber
Main spans1 (+2 approach)
Design loadH 15
Structure length153 ft (46.6 m)
Longest span105 ft (32 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deck11 ft (3.5 m)

Traffic and service

Average daily traffic350 (2021)
Projected traffic515 by 2041
Trucks2%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$862,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Camp Morrison RD over Thomas Creek built?

It was built in 1936, making it 89 years old in 2025.

What condition is Camp Morrison RD over Thomas Creek 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 July 2024.

How much traffic does Camp Morrison RD over Thomas Creek carry?

About 350 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Camp Morrison RD over Thomas Creek?

The structure is 153 ft (46.6 m) long with a longest span of 105 ft (32 m) and a deck 20 ft wide.

Who owns Camp Morrison RD over Thomas Creek?

It is owned by the County Highway Agency.