US Bridges

Road over Mosquito Creek

Fair

Klamath County, Oregon · (orig.# 286 - 15.6) · Structure no. 062001000001027

Built
1973
52 years old, rebuilt 2000
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
32 ft
1 main span
Daily traffic
26
Owner
Federal
U.S. Forest Service

About this bridge

Road over Mosquito Creek is a wood or timber stringer/multi-beam or girder carrying Road over Mosquito Creek in Klamath County, Oregon. It was built in 1973 and reconstructed in 2000, so it is 52 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 26 vehicles a day, projected to reach 39 by 2045. The structure is 32 ft (9.9 m) long and 31 ft wide. If it were closed, the detour would be 15.5 mi (25 km).

CarriesRoad
CrossesMosquito Creek
Location(orig.# 286 - 15.6)
RouteFederal Lands Road 86000
StateOregon
Coordinates43.04081, -121.59156
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 protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
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 geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41 US tons
Inventory rating29 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadOther
Structure length32 ft (9.9 m)
Longest span31 ft (9.4 m)
Deck width31 ft (9.4 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (—)
Projected traffic39 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed15.5 mi (25 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Road over Mosquito Creek built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2000.

What condition is Road over Mosquito 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 2023.

How much traffic does Road over Mosquito Creek carry?

About 26 vehicles per day (latest count).

How long is Road over Mosquito Creek?

The structure is 32 ft (9.9 m) long with a longest span of 31 ft (9.4 m) and a deck 31 ft wide.

Who owns Road over Mosquito Creek?

It is owned by the U.S. Forest Service.