US Bridges

South Skagit HWY over Loretta Creek

Fair

Skagit County, Washington · 11 MI E JCT SR9 · Structure no. 083044000000000

Built
1961
64 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
85 ft
3 main spans
Daily traffic
825
2021 count
Owner
County
County Highway Agency

About this bridge

South Skagit HWY over Loretta Creek is a prestressed concrete stringer/multi-beam or girder carrying South Skagit HWY over Loretta Creek in Skagit County, Washington. It was built in 1961, so it is 64 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 825 vehicles a day, roughly 11% of them trucks, projected to reach 1,226 by 2041. The structure is 85 ft (25.9 m) long and 26 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

CarriesSouth Skagit HWY
CrossesLoretta Creek
Location11 MI E JCT SR9
RouteCounty Highway 7000
Coordinates48.50331, -122.02244
Functional classRural Major Collector

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span75 ft (22.9 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic825 (2021)
Projected traffic1,226 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was South Skagit HWY over Loretta Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is South Skagit HWY over Loretta Creek 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 South Skagit HWY over Loretta Creek carry?

About 825 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is South Skagit HWY over Loretta Creek?

The structure is 85 ft (25.9 m) long with a longest span of 75 ft (22.9 m) and a deck 26 ft wide.

Who owns South Skagit HWY over Loretta Creek?

It is owned by the County Highway Agency.