US Bridges

Timber Lane Drive over Grouse Creek

Fair

Kenai Peninsula Borough, Alaska · Mile Point 0.1 · Structure no. 1821

Built
1986
39 years old, rebuilt 2006
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
500
2018 count
Owner
County
County Highway Agency

About this bridge

Timber Lane Drive over Grouse Creek is a steel stringer/multi-beam or girder carrying Timber Lane Drive over Grouse Creek in Kenai Peninsula Borough, Alaska. It was built in 1986 and reconstructed in 2006, 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 500 vehicles a day, roughly 1% of them trucks, projected to reach 600 by 2035. The structure is 40 ft (12.2 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesTimber Lane Drive
CrossesGrouse Creek
LocationMile Point 0.1
RouteCounty Highway NSP00
CountyKenai Peninsula Borough
StateAlaska
Coordinates60.19222, -149.37556
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
Deck7 GoodSome minor problems.
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 protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.1 US tons
Inventory rating34.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length40 ft (12.2 m)
Longest span35 ft (10.7 m)
Deck width25 ft (7.6 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2018)
Projected traffic600 by 2035
Trucks1%
Lanes on structure2
Traffic directionTwo-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 Timber Lane Drive over Grouse Creek built?

It was built in 1986, making it 39 years old in 2025. It was reconstructed in 2006.

What condition is Timber Lane Drive over Grouse 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 Timber Lane Drive over Grouse Creek carry?

About 500 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Timber Lane Drive over Grouse Creek?

The structure is 40 ft (12.2 m) long with a longest span of 35 ft (10.7 m) and a deck 25 ft wide.

Who owns Timber Lane Drive over Grouse Creek?

It is owned by the County Highway Agency.