US Bridges

Mineral Creek Road over Mineral Creek

PoorPosted for load

County 063, Alaska · Mile Point 0.3 · Structure no. 0944

Built
1970
55 years old
Condition
Poor
inspected August 2023
Type
Truss - Thru
Steel
Length
101 ft
1 main span
Daily traffic
75
2018 count
Owner
State
State Highway Agency

About this bridge

Mineral Creek Road over Mineral Creek is a steel truss - thru carrying Mineral Creek Road over Mineral Creek in County 063, Alaska. It was built in 1970, so it is 55 years old, older than the Alaska average of 35.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 75 vehicles a day, roughly 1% of them trucks, projected to reach 90 by 2035. The structure is 101 ft (30.8 m) long and 12 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesMineral Creek Road
CrossesMineral Creek
LocationMile Point 0.3
RouteState Highway NSP00
StateAlaska
Coordinates61.14194, -146.36194
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating18.8 US tons
Inventory rating6.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 15
Structure length101 ft (30.8 m)
Longest span100 ft (30.5 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2018)
Projected traffic90 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

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 Mineral Creek Road over Mineral Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Mineral Creek Road over Mineral Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.

How much traffic does Mineral Creek Road over Mineral Creek carry?

About 75 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Mineral Creek Road over Mineral Creek?

The structure is 101 ft (30.8 m) long with a longest span of 100 ft (30.5 m) and a deck 12 ft wide.

Who owns Mineral Creek Road over Mineral Creek?

It is owned by the State Highway Agency.