US Bridges

NE 31st Stree over May Creek

Good

King County, Washington · 0.5 MI E of I-405 · Structure no. 089028000000000

Built
2018
7 years old
Condition
Good
inspected June 2023
Type
Slab
Concrete
Length
79 ft
1 main span
Daily traffic
30
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

NE 31st Stree over May Creek is a concrete slab carrying NE 31st Stree over May Creek in King County, Washington. It was built in 2018, so it is 7 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30 vehicles a day, roughly 1% of them trucks, projected to reach 50 by 2043. The structure is 79 ft (24.1 m) long and 21 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesNE 31st Stree
CrossesMay Creek
Location0.5 MI E of I-405
RouteCity Street 1070
Coordinates47.51903, -122.19154
Functional classUrban Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length79 ft (24.1 m)
Longest span75 ft (22.9 m)
Deck width21 ft (6.3 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic50 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$1.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NE 31st Stree over May Creek built?

It was built in 2018, making it 7 years old in 2025.

What condition is NE 31st Stree over May 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 June 2023.

How much traffic does NE 31st Stree over May Creek carry?

About 30 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is NE 31st Stree over May Creek?

The structure is 79 ft (24.1 m) long with a longest span of 75 ft (22.9 m) and a deck 21 ft wide.

Who owns NE 31st Stree over May Creek?

It is owned by the City or Municipal Highway Agency.