US Bridges

SR 21 over Lake CR

Good

Lincoln County, Washington · 6.4 N JCT SR 28 · Structure no. 0008491A0000000

Built
1969
56 years old
Condition
Good
inspected April 2021
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
255
2023 count
Owner
State
State Highway Agency

About this bridge

SR 21 over Lake CR is a concrete slab carrying SR 21 over Lake CR in Lincoln County, Washington. It was built in 1969, so it is 56 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 255 vehicles a day, roughly 18% of them trucks, projected to reach 280 by 2039. The structure is 24 ft (7.3 m) long and 35 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesSR 21
CrossesLake CR
Location6.4 N JCT SR 28
RouteState Highway 21
Coordinates47.41813, -118.68706
Functional classRural Major 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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating61.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic255 (2023)
Projected traffic280 by 2039
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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$331,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 21 over Lake CR built?

It was built in 1969, making it 56 years old in 2025.

What condition is SR 21 over Lake CR 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 April 2021.

How much traffic does SR 21 over Lake CR carry?

About 255 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is SR 21 over Lake CR?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 35 ft wide.

Who owns SR 21 over Lake CR?

It is owned by the State Highway Agency.