US Bridges

Nile Road over Rattlesnake Creek

Fair

Yakima County, Washington · 00.02 N Rattlesnake · Structure no. 080006000000000

Built
1976
49 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
285 ft
3 main spans
Daily traffic
600
2023 count
Owner
County
County Highway Agency

About this bridge

Nile Road over Rattlesnake Creek is a concrete continuous box beam or girders - single or spread carrying Nile Road over Rattlesnake Creek in Yakima County, Washington. It was built in 1976, so it is 49 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 600 vehicles a day, roughly 5% of them trucks, projected to reach 1,260 by 2043. The structure is 285 ft (86.9 m) long and 32 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesNile Road
CrossesRattlesnake Creek
Location00.02 N Rattlesnake
RouteCounty Highway 15500
Coordinates46.81934, -120.93474
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating37.1 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length285 ft (86.9 m)
Longest span170 ft (51.8 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2023)
Projected traffic1,260 by 2043
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$7.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nile Road over Rattlesnake Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Nile Road over Rattlesnake Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does Nile Road over Rattlesnake Creek carry?

About 600 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nile Road over Rattlesnake Creek?

The structure is 285 ft (86.9 m) long with a longest span of 170 ft (51.8 m) and a deck 32 ft wide.

Who owns Nile Road over Rattlesnake Creek?

It is owned by the County Highway Agency.