US Bridges

Hannegan RD over Nooksack River

Fair

Whatcom County, Washington · 00.1 N Polinder Rd. · Structure no. 082688000000000

Built
1934
91 years old, rebuilt 1961
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
320 ft
1 main span
Daily traffic
9,332
2018 count
Owner
County
County Highway Agency

About this bridge

Hannegan RD over Nooksack River is a steel stringer/multi-beam or girder carrying Hannegan RD over Nooksack River in Whatcom County, Washington. It was built in 1934 and reconstructed in 1961, so it is 91 years old, older than the Washington average of 49.8 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.

It carries about 9,332 vehicles a day, roughly 3% of them trucks, projected to reach 12,000 by 2040. The structure is 320 ft (97.5 m) long and 30 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesHannegan RD
CrossesNooksack River
Location00.1 N Polinder Rd.
RouteCounty Highway 55110
CountyWhatcom County
StateWashington
Coordinates48.93679, -122.44211
Functional classRural Major 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
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length320 ft (97.5 m)
Longest span120 ft (36.6 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,332 (2018)
Projected traffic12,000 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$11.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Hannegan RD over Nooksack River built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1961.

What condition is Hannegan RD over Nooksack River 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 March 2024.

How much traffic does Hannegan RD over Nooksack River carry?

About 9,332 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is Hannegan RD over Nooksack River?

The structure is 320 ft (97.5 m) long with a longest span of 120 ft (36.6 m) and a deck 30 ft wide.

Who owns Hannegan RD over Nooksack River?

It is owned by the County Highway Agency.