US Bridges

Nelms RD over Woodward Canyon

Good

Walla Walla County, Washington · 0.013N Woodward Can · Structure no. 086084000000000

Built
1994
31 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
7
2024 count
Owner
County
County Highway Agency

About this bridge

Nelms RD over Woodward Canyon is a prestressed concrete stringer/multi-beam or girder carrying Nelms RD over Woodward Canyon in Walla Walla County, Washington. It was built in 1994, so it is 31 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 7 vehicles a day, roughly 30% of them trucks, projected to reach 10 by 2046. The structure is 32 ft (9.9 m) long and 37 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesNelms RD
CrossesWoodward Canyon
Location0.013N Woodward Can
RouteCounty Highway 93450
Coordinates46.10164, -118.58242
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating31.4 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20 + Mod
Structure length32 ft (9.9 m)
Longest span31 ft (9.6 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7 (2024)
Projected traffic10 by 2046
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed19.9 mi (32 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$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nelms RD over Woodward Canyon built?

It was built in 1994, making it 31 years old in 2025.

What condition is Nelms RD over Woodward Canyon 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 2024.

How much traffic does Nelms RD over Woodward Canyon carry?

About 7 vehicles per day (2024 count), of which roughly 30% are trucks.

How long is Nelms RD over Woodward Canyon?

The structure is 32 ft (9.9 m) long with a longest span of 31 ft (9.6 m) and a deck 37 ft wide.

Who owns Nelms RD over Woodward Canyon?

It is owned by the County Highway Agency.