US Bridges

91 Mile Loop over Little Tok Overflow

GoodPosted for load

County 066, Alaska · Old Tok Alignment MP 0.6 · Structure no. 0659

Built
1954
71 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
27 ft
1 main span
Daily traffic
30
2018 count
Owner
State
State Highway Agency

About this bridge

91 Mile Loop over Little Tok Overflow is a wood or timber stringer/multi-beam or girder carrying 91 Mile Loop over Little Tok Overflow in County 066, Alaska. It was built in 1954, so it is 71 years old, older 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. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, roughly 1% of them trucks, projected to reach 40 by 2035. The structure is 27 ft (8.2 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Carries91 Mile Loop
CrossesLittle Tok Overflow
LocationOld Tok Alignment MP 0.6
RouteState Highway NSP00
StateAlaska
Coordinates62.964, -143.3357
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.6 US tons
Inventory rating25.7 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 20
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2018)
Projected traffic40 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

OwnerState Highway Agency
Maintained byState 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 91 Mile Loop over Little Tok Overflow built?

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

What condition is 91 Mile Loop over Little Tok Overflow 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 July 2023.

How much traffic does 91 Mile Loop over Little Tok Overflow carry?

About 30 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is 91 Mile Loop over Little Tok Overflow?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns 91 Mile Loop over Little Tok Overflow?

It is owned by the State Highway Agency.