US Bridges

Small Boat Launch over Ship Creek

Good

Anchorage Municipality, Alaska · Mile Point 0.2 · Structure no. 2150

Built
2005
20 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
190 ft
2 main spans
Daily traffic
100
2018 count
Owner
Railroad
Railroad

About this bridge

Small Boat Launch over Ship Creek is a prestressed concrete tee beam carrying Small Boat Launch over Ship Creek in Anchorage Municipality, Alaska. It was built in 2005, so it is 20 years old, younger than the Alaska average of 35.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 1% of them trucks, projected to reach 120 by 2035. The structure is 190 ft (57.9 m) long and 44 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesSmall Boat Launch
CrossesShip Creek
LocationMile Point 0.2
RouteState Highway 555
StateAlaska
Coordinates61.22361, -149.89278
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating110.1 US tons
Inventory rating70 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHL 93
Structure length190 ft (57.9 m)
Longest span93 ft (28.3 m)
Deck width44 ft (13.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2018)
Projected traffic120 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

OwnerRailroad
Maintained byCity or Municipal 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 Small Boat Launch over Ship Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Small Boat Launch over Ship Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Small Boat Launch over Ship Creek carry?

About 100 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Small Boat Launch over Ship Creek?

The structure is 190 ft (57.9 m) long with a longest span of 93 ft (28.3 m) and a deck 44 ft wide.

Who owns Small Boat Launch over Ship Creek?

It is owned by the Railroad and maintained by the City or Municipal Highway Agency.