US Bridges

Hileman RD over Mohawk River

Fair

Lane County, Oregon · 050 MI N Marcola · Structure no. 39C178198200002

Built
1972
53 years old
Condition
Fair
inspected August 2024
Type
Slab
Prestressed Concrete
Length
135 ft
3 main spans
Daily traffic
167
2020 count
Owner
County
County Highway Agency

About this bridge

Hileman RD over Mohawk River is a prestressed concrete slab carrying Hileman RD over Mohawk River in Lane County, Oregon. It was built in 1972, so it is 53 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 167 vehicles a day, roughly 5% of them trucks, projected to reach 197 by 2025. The structure is 135 ft (41.1 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesHileman RD
CrossesMohawk River
Location050 MI N Marcola
RouteCounty Highway C1982
StateOregon
Coordinates44.20797, -122.8314
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span60 ft (18.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic167 (2020)
Projected traffic197 by 2025
Trucks5%
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 Hileman RD over Mohawk River built?

It was built in 1972, making it 53 years old in 2025.

What condition is Hileman RD over Mohawk River 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 August 2024.

How much traffic does Hileman RD over Mohawk River carry?

About 167 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Hileman RD over Mohawk River?

The structure is 135 ft (41.1 m) long with a longest span of 60 ft (18.3 m) and a deck 32 ft wide.

Who owns Hileman RD over Mohawk River?

It is owned by the County Highway Agency.