US Bridges

On Ramp to HWY 4 over US Govt Canal

Fair

Klamath County, Oregon · 011 MI S JCT With HWY 50 · Structure no. 08510 004C27368

Built
1959
66 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
200 ft
1 main span
Daily traffic
1,263
2022 count
Owner
State
State Highway Agency

About this bridge

On Ramp to HWY 4 over US Govt Canal is a steel stringer/multi-beam or girder carrying On Ramp to HWY 4 over US Govt Canal in Klamath County, Oregon. It was built in 1959, so it is 66 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 1,263 vehicles a day, roughly 13% of them trucks, projected to reach 870 by 2030. The structure is 200 ft (61 m) long and 35 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesOn Ramp to HWY 4
CrossesUS Govt Canal
Location011 MI S JCT With HWY 50
RouteU.S. Route 97
CountyKlamath County
StateOregon
Coordinates42.23815, -121.79762
Functional classUrban Other Principal Arterial

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.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating29.3 US tons
Inventory rating22.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length200 ft (61 m)
Longest span94 ft (28.7 m)
Deck width35 ft (10.6 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,263 (2022)
Projected traffic870 by 2030
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was On Ramp to HWY 4 over US Govt Canal built?

It was built in 1959, making it 66 years old in 2025.

What condition is On Ramp to HWY 4 over US Govt Canal 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 February 2023.

How much traffic does On Ramp to HWY 4 over US Govt Canal carry?

About 1,263 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is On Ramp to HWY 4 over US Govt Canal?

The structure is 200 ft (61 m) long with a longest span of 94 ft (28.7 m) and a deck 35 ft wide.

Who owns On Ramp to HWY 4 over US Govt Canal?

It is owned by the State Highway Agency.