US Bridges

Quartz Creek Road over Crescent Creek

FairPosted for load

Kenai Peninsula Borough, Alaska · Mile Point 2.6 · Structure no. 1021

Built
1959
66 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
56 ft
2 main spans
Daily traffic
100
2020 count
Owner
State
State Highway Agency

About this bridge

Quartz Creek Road over Crescent Creek is a wood or timber stringer/multi-beam or girder carrying Quartz Creek Road over Crescent Creek in Kenai Peninsula Borough, Alaska. It was built in 1959, so it is 66 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 6% of them trucks, projected to reach 110 by 2039. The structure is 56 ft (17.1 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesQuartz Creek Road
CrossesCrescent Creek
LocationMile Point 2.6
RouteState Highway NSPCG
CountyKenai Peninsula Borough
StateAlaska
Coordinates60.49583, -149.68083
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19.6 US tons
Inventory rating13.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length56 ft (17.1 m)
Longest span28 ft (8.5 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2020)
Projected traffic110 by 2039
Trucks6%
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 Quartz Creek Road over Crescent Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is Quartz Creek Road over Crescent 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 Quartz Creek Road over Crescent Creek carry?

About 100 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Quartz Creek Road over Crescent Creek?

The structure is 56 ft (17.1 m) long with a longest span of 28 ft (8.5 m) and a deck 16 ft wide.

Who owns Quartz Creek Road over Crescent Creek?

It is owned by the State Highway Agency.