US Bridges

SR 11 over Padden Creek

Good

Whatcom County, Washington · 7.0 N Skagit CO · Structure no. 0019493D0000000

Built
2021
4 years old
Condition
Good
inspected August 2024
Type
Culvert
Prestressed Concrete
Length
21 ft
1 main span
Daily traffic
14,626
2023 count
Owner
State
State Highway Agency

About this bridge

SR 11 over Padden Creek is a prestressed concrete culvert carrying SR 11 over Padden Creek in Whatcom County, Washington. It was built in 2021, so it is 4 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,626 vehicles a day, roughly 3% of them trucks, projected to reach 16,900 by 2042. The structure is 21 ft (6.4 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 11
CrossesPadden Creek
Location7.0 N Skagit CO
RouteState Highway 11
Coordinates48.71458, -122.47861
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating39.2 US tons

Structure

Structure typeCulvert
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width67 ft (20.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,626 (2023)
Projected traffic16,900 by 2042
Trucks3%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$459,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 11 over Padden Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is SR 11 over Padden Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does SR 11 over Padden Creek carry?

About 14,626 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is SR 11 over Padden Creek?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 67 ft wide.

Who owns SR 11 over Padden Creek?

It is owned by the State Highway Agency.