US Bridges

SR 534 over Hill Ditch

Good

Skagit County, Washington · 0.5 E JCT I-5 · Structure no. 0003677A0000000

Built
1949
76 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete Continuous
Length
83 ft
4 main spans
Daily traffic
3,873
2023 count
Owner
State
State Highway Agency

About this bridge

SR 534 over Hill Ditch is a concrete continuous slab carrying SR 534 over Hill Ditch in Skagit County, Washington. It was built in 1949, so it is 76 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 3,873 vehicles a day, roughly 8% of them trucks, projected to reach 5,671 by 2039. The structure is 83 ft (25.3 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesSR 534
CrossesHill Ditch
Location0.5 E JCT I-5
RouteState Highway 534
CountySkagit County
StateWashington
Coordinates48.341, -122.32453
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length83 ft (25.3 m)
Longest span19 ft (5.8 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,873 (2023)
Projected traffic5,671 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 534 over Hill Ditch built?

It was built in 1949, making it 76 years old in 2025.

What condition is SR 534 over Hill Ditch 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 2023.

How much traffic does SR 534 over Hill Ditch carry?

About 3,873 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 534 over Hill Ditch?

The structure is 83 ft (25.3 m) long with a longest span of 19 ft (5.8 m) and a deck 30 ft wide.

Who owns SR 534 over Hill Ditch?

It is owned by the State Highway Agency.