US Bridges

Irr:nome-Taylor RD over Kougarok River

PoorPosted for load

Nome Census Area, Alaska · Mile Point 85.4 · Structure no. 0893

Built
1941
84 years old
Condition
Poor
inspected August 2024
Type
Truss - Thru
Steel
Length
183 ft
1 main span
Daily traffic
50
2018 count
Owner
State
State Highway Agency

About this bridge

Irr:nome-Taylor RD over Kougarok River is a steel truss - thru carrying Irr:nome-Taylor RD over Kougarok River in Nome Census Area, Alaska. It was built in 1941, so it is 84 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 50 vehicles a day, roughly 1% of them trucks, projected to reach 60 by 2035. The structure is 183 ft (55.8 m) long and 13 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesIrr:nome-Taylor RD
CrossesKougarok River
LocationMile Point 85.4
RouteState Highway NSP00
StateAlaska
Coordinates65.43382, -164.66818
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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating27.2 US tons
Inventory rating12.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 15
Structure length183 ft (55.8 m)
Longest span182 ft (55.5 m)
Deck width13 ft (4 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deck14 ft (4.2 m)

Traffic and service

Average daily traffic50 (2018)
Projected traffic60 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 Irr:nome-Taylor RD over Kougarok River built?

It was built in 1941, making it 84 years old in 2025.

What condition is Irr:nome-Taylor RD over Kougarok River 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 2024.

How much traffic does Irr:nome-Taylor RD over Kougarok River carry?

About 50 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Irr:nome-Taylor RD over Kougarok River?

The structure is 183 ft (55.8 m) long with a longest span of 182 ft (55.5 m) and a deck 13 ft wide.

Who owns Irr:nome-Taylor RD over Kougarok River?

It is owned by the State Highway Agency.