US Bridges

Sunderman RD over Mohawk River

Fair

Lane County, Oregon · 080 MI N Springfield · Structure no. 39C165194800219

Built
1984
41 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
192 ft
2 main spans
Daily traffic
838
2020 count
Owner
County
County Highway Agency

About this bridge

Sunderman RD over Mohawk River is a prestressed concrete stringer/multi-beam or girder carrying Sunderman RD over Mohawk River in Lane County, Oregon. It was built in 1984, so it is 41 years old, younger 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 838 vehicles a day, roughly 10% of them trucks, projected to reach 983 by 2025. The structure is 192 ft (58.5 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSunderman RD
CrossesMohawk River
Location080 MI N Springfield
RouteCounty Highway C1948
StateOregon
Coordinates44.14127, -122.90709
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating34.3 US tons
Inventory rating26.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length192 ft (58.5 m)
Longest span95 ft (29 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic838 (2020)
Projected traffic983 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Sunderman RD over Mohawk River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Sunderman 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 Sunderman RD over Mohawk River carry?

About 838 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Sunderman RD over Mohawk River?

The structure is 192 ft (58.5 m) long with a longest span of 95 ft (29 m) and a deck 31 ft wide.

Who owns Sunderman RD over Mohawk River?

It is owned by the County Highway Agency.