US Bridges

Mitchell Ave over I-5

Good

Whatcom County, Washington · 0.4 N JCT SR 543 · Structure no. 0006851A0000000

Built
1963
62 years old
Condition
Good
inspected June 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
303 ft
4 main spans
Daily traffic
5,000
2002 count
Owner
State
State Highway Agency

About this bridge

Mitchell Ave over I-5 is a prestressed concrete stringer/multi-beam or girder carrying Mitchell Ave over I-5 in Whatcom County, Washington. It was built in 1963, so it is 62 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,000 vehicles a day, roughly 5% of them trucks, projected to reach 6,870 by 2036. The structure is 303 ft (92.4 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMitchell Ave
CrossesI-5
Location0.4 N JCT SR 543
RouteCounty Highway 0
Coordinates48.99053, -122.74169
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length303 ft (92.4 m)
Longest span93 ft (28.3 m)
Deck width37 ft (11.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2002)
Projected traffic6,870 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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$3.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mitchell Ave over I-5 built?

It was built in 1963, making it 62 years old in 2025.

What condition is Mitchell Ave over I-5 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 June 2021.

How much traffic does Mitchell Ave over I-5 carry?

About 5,000 vehicles per day (2002 count), of which roughly 5% are trucks.

How long is Mitchell Ave over I-5?

The structure is 303 ft (92.4 m) long with a longest span of 93 ft (28.3 m) and a deck 37 ft wide.

Who owns Mitchell Ave over I-5?

It is owned by the State Highway Agency.