US Bridges

SR 109 over Jessie Slough

Fair

Grays Harbor County, Washington · 10.8 N JCT US 101 · Structure no. 0004078A0000000

Built
1952
73 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
102 ft
5 main spans
Daily traffic
6,497
2023 count
Owner
State
State Highway Agency

About this bridge

SR 109 over Jessie Slough is a concrete continuous slab carrying SR 109 over Jessie Slough in Grays Harbor County, Washington. It was built in 1952, so it is 73 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 6,497 vehicles a day, roughly 6% of them trucks, projected to reach 7,066 by 2039. The structure is 102 ft (31.1 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesSR 109
CrossesJessie Slough
Location10.8 N JCT US 101
RouteState Highway 109
CountyGrays Harbor County
StateWashington
Coordinates47.05655, -124.04961
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 15
Structure length102 ft (31.1 m)
Longest span22 ft (6.7 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,497 (2023)
Projected traffic7,066 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 109 over Jessie Slough built?

It was built in 1952, making it 73 years old in 2025.

What condition is SR 109 over Jessie Slough 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 June 2024.

How much traffic does SR 109 over Jessie Slough carry?

About 6,497 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 109 over Jessie Slough?

The structure is 102 ft (31.1 m) long with a longest span of 22 ft (6.7 m) and a deck 30 ft wide.

Who owns SR 109 over Jessie Slough?

It is owned by the State Highway Agency.