US Bridges

Sultan Basin RD over Olney Creek

Good

Snohomish County, Washington · 7.2 NE JCT SR 2 · Structure no. 085750000000000

Built
1990
35 years old
Condition
Good
inspected April 2024
Type
Tee Beam
Prestressed Concrete
Length
86 ft
1 main span
Daily traffic
334
2023 count
Owner
County
County Highway Agency

About this bridge

Sultan Basin RD over Olney Creek is a prestressed concrete tee beam carrying Sultan Basin RD over Olney Creek in Snohomish County, Washington. It was built in 1990, so it is 35 years old, younger 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 334 vehicles a day, roughly 3% of them trucks, projected to reach 350 by 2042. The structure is 86 ft (26.2 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSultan Basin RD
CrossesOlney Creek
Location7.2 NE JCT SR 2
RouteCounty Highway 95791
Coordinates47.92359, -121.74435
Functional classRural Minor 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 protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96 US tons
Inventory rating50 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length86 ft (26.2 m)
Longest span81 ft (24.8 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic334 (2023)
Projected traffic350 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sultan Basin RD over Olney Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is Sultan Basin RD over Olney Creek 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 2024.

How much traffic does Sultan Basin RD over Olney Creek carry?

About 334 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Sultan Basin RD over Olney Creek?

The structure is 86 ft (26.2 m) long with a longest span of 81 ft (24.8 m) and a deck 31 ft wide.

Who owns Sultan Basin RD over Olney Creek?

It is owned by the County Highway Agency.