US Bridges

Little Naches Road over Little Naches

Good

Kittitas County, Washington · Below 1906 · Structure no. 061708000001526

Built
1966
59 years old, rebuilt 1994
Condition
Good
inspected October 2021
Type
Frame
Concrete Continuous
Length
120 ft
3 main spans
Daily traffic
80
1991 count
Owner
Federal
U.S. Forest Service

About this bridge

Little Naches Road over Little Naches is a concrete continuous frame carrying Little Naches Road over Little Naches in Kittitas County, Washington. It was built in 1966 and reconstructed in 1994, so it is 59 years old, older 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 80 vehicles a day, projected to reach 120 by 2045. The structure is 120 ft (36.6 m) long and 31 ft wide. If it were closed, the detour would be 10.6 mi (17 km).

CarriesLittle Naches Road
CrossesLittle Naches
LocationBelow 1906
RouteFederal Lands Road 19000
Coordinates47.06361, -121.21806
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2021
Inspection intervalevery 48 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating45.1 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length120 ft (36.6 m)
Longest span80 ft (24.4 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (1991)
Projected traffic120 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed10.6 mi (17 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Little Naches Road over Little Naches built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1994.

What condition is Little Naches Road over Little Naches 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 2021.

How much traffic does Little Naches Road over Little Naches carry?

About 80 vehicles per day (1991 count).

How long is Little Naches Road over Little Naches?

The structure is 120 ft (36.6 m) long with a longest span of 80 ft (24.4 m) and a deck 31 ft wide.

Who owns Little Naches Road over Little Naches?

It is owned by the U.S. Forest Service.