US Bridges

SR 4 over Coal CR Sl

Good

Cowlitz County, Washington · 9.3 E Wahkiakum CO · Structure no. 0007399A0000000

Built
1964
61 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
178 ft
4 main spans
Daily traffic
5,580
2023 count
Owner
State
State Highway Agency

About this bridge

SR 4 over Coal CR Sl is a prestressed concrete stringer/multi-beam or girder carrying SR 4 over Coal CR Sl in Cowlitz County, Washington. It was built in 1964, so it is 61 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 5,580 vehicles a day, roughly 8% of them trucks, projected to reach 7,408 by 2039. The structure is 178 ft (54.3 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSR 4
CrossesCoal CR Sl
Location9.3 E Wahkiakum CO
RouteState Highway 4
CountyCowlitz County
StateWashington
Coordinates46.17814, -123.03083
Functional classRural Principal Arterial - Other

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.9 US tons
Inventory rating21.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length178 ft (54.3 m)
Longest span54 ft (16.5 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,580 (2023)
Projected traffic7,408 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

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$2.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 4 over Coal CR Sl built?

It was built in 1964, making it 61 years old in 2025.

What condition is SR 4 over Coal CR Sl 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 October 2023.

How much traffic does SR 4 over Coal CR Sl carry?

About 5,580 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 4 over Coal CR Sl?

The structure is 178 ft (54.3 m) long with a longest span of 54 ft (16.5 m) and a deck 33 ft wide.

Who owns SR 4 over Coal CR Sl?

It is owned by the State Highway Agency.