US Bridges

SR 547 over Saar Creek

Poor

Whatcom County, Washington · 8.8 N JCT SR 542 · Structure no. 000000PG0000000

Built
1970
55 years old
Condition
Poor
inspected August 2023
Type
Channel Beam
Concrete
Length
32 ft
1 main span
Daily traffic
1,522
2023 count
Owner
State
State Highway Agency

About this bridge

SR 547 over Saar Creek is a concrete channel beam carrying SR 547 over Saar Creek in Whatcom County, Washington. It was built in 1970, so it is 55 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 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.

It carries about 1,522 vehicles a day, roughly 6% of them trucks, projected to reach 2,118 by 2039. The structure is 32 ft (9.8 m) long and 25 ft wide. If it were closed, the detour would be 28 mi (45 km).

CarriesSR 547
CrossesSaar Creek
Location8.8 N JCT SR 542
RouteState Highway 547
Coordinates48.98188, -122.2385
Functional classRural Major 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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
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 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.9 US tons
Inventory rating22.2 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span29 ft (8.8 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,522 (2023)
Projected traffic2,118 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$380,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 547 over Saar Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is SR 547 over Saar 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 August 2023.

How much traffic does SR 547 over Saar Creek carry?

About 1,522 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 547 over Saar Creek?

The structure is 32 ft (9.8 m) long with a longest span of 29 ft (8.8 m) and a deck 25 ft wide.

Who owns SR 547 over Saar Creek?

It is owned by the State Highway Agency.