US Bridges

SR 17 over Parker Horn

Good

Grant County, Washington · 0.3 N JCT SR 171 · Structure no. 0004840A0000000

Built
1955
70 years old, rebuilt 2007
Condition
Good
inspected October 2024
Type
Slab
Concrete Continuous
Length
104 ft
5 main spans
Daily traffic
11,733
2023 count
Owner
State
State Highway Agency

About this bridge

SR 17 over Parker Horn is a concrete continuous slab carrying SR 17 over Parker Horn in Grant County, Washington. It was built in 1955 and reconstructed in 2007, so it is 70 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 11,733 vehicles a day, roughly 5% of them trucks, projected to reach 13,156 by 2039. The structure is 104 ft (31.7 m) long and 75 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSR 17
CrossesParker Horn
Location0.3 N JCT SR 171
RouteState Highway 17
Coordinates47.14152, -119.26853
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length104 ft (31.7 m)
Longest span19 ft (5.8 m)
Deck width75 ft (22.9 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,733 (2023)
Projected traffic13,156 by 2039
Trucks5%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 17 over Parker Horn built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2007.

What condition is SR 17 over Parker Horn 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 SR 17 over Parker Horn carry?

About 11,733 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SR 17 over Parker Horn?

The structure is 104 ft (31.7 m) long with a longest span of 19 ft (5.8 m) and a deck 75 ft wide.

Who owns SR 17 over Parker Horn?

It is owned by the State Highway Agency.