US Bridges

Mountain Home Rd. over Oak Creek

Fair

Linn County, Oregon · 013 MI S CR 737 · Structure no. 11931 074100130

Built
1961
64 years old
Condition
Fair
inspected June 2023
Type
Slab
Prestressed Concrete
Length
24 ft
1 main span
Daily traffic
196
2021 count
Owner
County
County Highway Agency

About this bridge

Mountain Home Rd. over Oak Creek is a prestressed concrete slab carrying Mountain Home Rd. over Oak Creek in Linn County, Oregon. It was built in 1961, so it is 64 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 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 196 vehicles a day, roughly 10% of them trucks, projected to reach 268 by 2041. The structure is 24 ft (7.3 m) long and 29 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesMountain Home Rd.
CrossesOak Creek
Location013 MI S CR 737
RouteCounty Highway C0741
CountyLinn County
StateOregon
Coordinates44.4629, -122.86617
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic196 (2021)
Projected traffic268 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Mountain Home Rd. over Oak Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is Mountain Home Rd. over Oak 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 June 2023.

How much traffic does Mountain Home Rd. over Oak Creek carry?

About 196 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Mountain Home Rd. over Oak Creek?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 29 ft wide.

Who owns Mountain Home Rd. over Oak Creek?

It is owned by the County Highway Agency.