US Bridges

Sultan Basin RD over Branch Olney Creek

Good

Snohomish County, Washington · 11.8 NE JCT SR 2 · Structure no. 085962000000000

Built
1991
34 years old
Condition
Good
inspected September 2023
Type
Slab
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
100
2021 count
Owner
County
County Highway Agency

About this bridge

Sultan Basin RD over Branch Olney Creek is a prestressed concrete slab carrying Sultan Basin RD over Branch Olney Creek in Snohomish County, Washington. It was built in 1991, so it is 34 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 175 by 2044. The structure is 47 ft (14.3 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSultan Basin RD
CrossesBranch Olney Creek
Location11.8 NE JCT SR 2
RouteCounty Highway 95791
Coordinates47.95353, -121.68649
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating87 US tons
Inventory rating52 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span46 ft (14 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2021)
Projected traffic175 by 2044
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$2.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sultan Basin RD over Branch Olney Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Sultan Basin RD over Branch 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 September 2023.

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

About 100 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Sultan Basin RD over Branch Olney Creek?

The structure is 47 ft (14.3 m) long with a longest span of 46 ft (14 m) and a deck 28 ft wide.

Who owns Sultan Basin RD over Branch Olney Creek?

It is owned by the County Highway Agency.