US Bridges

SR 971 over First Creek

Good

Chelan County, Washington · 9.1 N JCT US 97 Alt · Structure no. 0015563B0000000

Built
1999
26 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
1,569
2023 count
Owner
State
State Highway Agency

About this bridge

SR 971 over First Creek is a prestressed concrete stringer/multi-beam or girder carrying SR 971 over First Creek in Chelan County, Washington. It was built in 1999, so it is 26 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 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 1,569 vehicles a day, roughly 8% of them trucks, projected to reach 2,053 by 2039. The structure is 59 ft (18 m) long and 56 ft wide. If it were closed, the detour would be 23 mi (37 km).

CarriesSR 971
CrossesFirst Creek
Location9.1 N JCT US 97 Alt
RouteState Highway 971
Coordinates47.87383, -120.20051
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length59 ft (18 m)
Longest span53 ft (16.1 m)
Deck width56 ft (17.1 m)
Roadway width53 ft (16.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,569 (2023)
Projected traffic2,053 by 2039
Trucks8%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 971 over First Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is SR 971 over First 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 July 2023.

How much traffic does SR 971 over First Creek carry?

About 1,569 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 971 over First Creek?

The structure is 59 ft (18 m) long with a longest span of 53 ft (16.1 m) and a deck 56 ft wide.

Who owns SR 971 over First Creek?

It is owned by the State Highway Agency.