US Bridges

Irr:kolgnk Dump RD over Unnamed Creek

PoorPosted for load

Dillingham Census Area, Alaska · Koliganek · Structure no. 1835

Built
1980
45 years old, rebuilt 1986
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
41 ft
1 main span
Daily traffic
10
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Irr:kolgnk Dump RD over Unnamed Creek is a wood or timber stringer/multi-beam or girder carrying Irr:kolgnk Dump RD over Unnamed Creek in Dillingham Census Area, Alaska. It was built in 1980 and reconstructed in 1986, so it is 45 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 10 vehicles a day, roughly 1% of them trucks, projected to reach 12 by 2035. The structure is 41 ft (12.5 m) long and 15 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesIrr:kolgnk Dump RD
CrossesUnnamed Creek
LocationKoliganek
RouteCounty Highway NSP00
StateAlaska
Coordinates59.71902, -157.30942
Functional classRural Minor Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating3 US tons
Inventory rating2.3 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length41 ft (12.5 m)
Longest span39 ft (11.9 m)
Deck width15 ft (4.6 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2018)
Projected traffic12 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

OwnerCity or Municipal Highway Agency
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 Irr:kolgnk Dump RD over Unnamed Creek built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 1986.

What condition is Irr:kolgnk Dump RD over Unnamed 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 July 2024.

How much traffic does Irr:kolgnk Dump RD over Unnamed Creek carry?

About 10 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Irr:kolgnk Dump RD over Unnamed Creek?

The structure is 41 ft (12.5 m) long with a longest span of 39 ft (11.9 m) and a deck 15 ft wide.

Who owns Irr:kolgnk Dump RD over Unnamed Creek?

It is owned by the City or Municipal Highway Agency.