US Bridges

HWY 429 over Crescent Creek

FairPosted for load

Klamath County, Oregon · 023 MI S HWY 18 JCT · Structure no. 0M007 429 00227

Built
1954
71 years old
Condition
Fair
inspected August 2024
Type
Channel Beam
Concrete
Length
60 ft
4 main spans
Daily traffic
154
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 429 over Crescent Creek is a concrete channel beam carrying HWY 429 over Crescent Creek in Klamath County, Oregon. It was built in 1954, so it is 71 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 154 vehicles a day, roughly 25% of them trucks, projected to reach 200 by 2042. The structure is 60 ft (18.3 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesHWY 429
CrossesCrescent Creek
Location023 MI S HWY 18 JCT
RouteState Highway 429
StateOregon
Coordinates43.50874, -121.96883
Functional classRural Major 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 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
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.1 US tons
Inventory rating23.9 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span17 ft (5.2 m)
Deck width25 ft (7.7 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic154 (2022)
Projected traffic200 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 HWY 429 over Crescent Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is HWY 429 over Crescent 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 August 2024.

How much traffic does HWY 429 over Crescent Creek carry?

About 154 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is HWY 429 over Crescent Creek?

The structure is 60 ft (18.3 m) long with a longest span of 17 ft (5.2 m) and a deck 25 ft wide.

Who owns HWY 429 over Crescent Creek?

It is owned by the State Highway Agency.