US Bridges

Zimovia Highway over Pat Creek

Fair

Wrangell City and Borough, Alaska · Mile Point 10.3 · Structure no. 1409

Built
1973
52 years old, rebuilt 1993
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
104 ft
3 main spans
Daily traffic
230
2020 count
Owner
State
State Highway Agency

About this bridge

Zimovia Highway over Pat Creek is a wood or timber stringer/multi-beam or girder carrying Zimovia Highway over Pat Creek in Wrangell City and Borough, Alaska. It was built in 1973 and reconstructed in 1993, so it is 52 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 230 vehicles a day, roughly 7% of them trucks, projected to reach 300 by 2039. The structure is 104 ft (31.7 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesZimovia Highway
CrossesPat Creek
LocationMile Point 10.3
RouteState Highway 0S943
StateAlaska
Coordinates56.3424, -132.339
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating53.4 US tons
Inventory rating27.9 US tons

Structure

MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span74 ft (22.6 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic230 (2020)
Projected traffic300 by 2039
Trucks7%
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 Zimovia Highway over Pat Creek built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1993.

What condition is Zimovia Highway over Pat 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 May 2023.

How much traffic does Zimovia Highway over Pat Creek carry?

About 230 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Zimovia Highway over Pat Creek?

The structure is 104 ft (31.7 m) long with a longest span of 74 ft (22.6 m) and a deck 25 ft wide.

Who owns Zimovia Highway over Pat Creek?

It is owned by the State Highway Agency.