US Bridges

Nelson Siding Road over Little Creek

Good

Kittitas County, Washington · 2.68 SE of I-90 · Structure no. 088500000000000

Built
2012
13 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete
Length
50 ft
1 main span
Daily traffic
643
2022 count
Owner
County
County Highway Agency

About this bridge

Nelson Siding Road over Little Creek is a concrete slab carrying Nelson Siding Road over Little Creek in Kittitas County, Washington. It was built in 2012, so it is 13 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 643 vehicles a day, roughly 27% of them trucks, projected to reach 1,703 by 2042. The structure is 50 ft (15.2 m) long and 32 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesNelson Siding Road
CrossesLittle Creek
Location2.68 SE of I-90
RouteCounty Highway 23030
Coordinates47.19776, -121.08909
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
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 rating69.7 US tons
Inventory rating53.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1 (+2 approach)
Design loadHL 93
Structure length50 ft (15.2 m)
Longest span46 ft (14 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic643 (2022)
Projected traffic1,703 by 2042
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$712,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nelson Siding Road over Little Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is Nelson Siding Road over Little 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 October 2024.

How much traffic does Nelson Siding Road over Little Creek carry?

About 643 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is Nelson Siding Road over Little Creek?

The structure is 50 ft (15.2 m) long with a longest span of 46 ft (14 m) and a deck 32 ft wide.

Who owns Nelson Siding Road over Little Creek?

It is owned by the County Highway Agency.