US Bridges

Forest Road over Lost Creek

Fair

Kenai Peninsula Borough, Alaska · Mile Point 0.1 · Structure no. 1838

Built
1986
39 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
70 ft
3 main spans
Daily traffic
487
2018 count
Owner
County
County Highway Agency

About this bridge

Forest Road over Lost Creek is a wood or timber stringer/multi-beam or girder carrying Forest Road over Lost Creek in Kenai Peninsula Borough, Alaska. It was built in 1986, so it is 39 years old, older than the Alaska average of 35.9 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.

It carries about 487 vehicles a day, roughly 1% of them trucks, projected to reach 584 by 2035. The structure is 70 ft (21.3 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesForest Road
CrossesLost Creek
LocationMile Point 0.1
RouteCity Street NSP00
StateAlaska
Coordinates60.19306, -149.37611
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating46.8 US tons
Inventory rating33.8 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 15
Structure length70 ft (21.3 m)
Longest span23 ft (7 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic487 (2018)
Projected traffic584 by 2035
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 Forest Road over Lost Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Forest Road over Lost 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 Forest Road over Lost Creek carry?

About 487 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Forest Road over Lost Creek?

The structure is 70 ft (21.3 m) long with a longest span of 23 ft (7 m) and a deck 20 ft wide.

Who owns Forest Road over Lost Creek?

It is owned by the County Highway Agency.