US Bridges

SR 127 over Snake R Central Ferry

Fair

Garfield County, Washington · 9.6 N JCT US 12 · Structure no. 0008494A0000000

Built
1969
56 years old
Condition
Fair
inspected July 2024
Type
Arch - Thru
Steel Continuous
Length
1,831 ft
3 main spans
Daily traffic
868
2023 count
Owner
State
State Highway Agency

About this bridge

SR 127 over Snake R Central Ferry is a steel continuous arch - thru carrying SR 127 over Snake R Central Ferry in Garfield 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 868 vehicles a day, roughly 29% of them trucks, projected to reach 855 by 2039. The structure is 1,831 ft (558.1 m) long and 34 ft wide. If it were closed, the detour would be 42.9 mi (69 km).

Location

Open in Google Maps
CarriesSR 127
CrossesSnake R Central Ferry
Location9.6 N JCT US 12
RouteState Highway 127
CountyGarfield County
StateWashington
Coordinates46.62403, -117.79653
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum 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 rating90.9 US tons
Inventory rating54 US tons

Structure

Structure typeArch - Thru
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+4 approach)
Design loadHS 20 + Mod
Structure length1,831 ft (558.1 m)
Longest span520 ft (158.5 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic868 (2023)
Projected traffic855 by 2039
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.9 mi (69 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$42.6 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR 127 over Snake R Central Ferry built?

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

What condition is SR 127 over Snake R Central Ferry in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does SR 127 over Snake R Central Ferry carry?

About 868 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is SR 127 over Snake R Central Ferry?

The structure is 1,831 ft (558.1 m) long with a longest span of 520 ft (158.5 m) and a deck 34 ft wide.

Who owns SR 127 over Snake R Central Ferry?

It is owned by the State Highway Agency.