US Bridges

Summit Lake Road over Kennedy Creek

Good

Thurston County, Washington · 0.2 M East of SR8 · Structure no. 081762000000000

Built
1985
40 years old
Condition
Good
inspected April 2023
Type
Slab
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
671
2021 count
Owner
County
County Highway Agency

About this bridge

Summit Lake Road over Kennedy Creek is a prestressed concrete slab carrying Summit Lake Road over Kennedy Creek in Thurston County, Washington. It was built in 1985, so it is 40 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 671 vehicles a day, roughly 15% of them trucks, projected to reach 1,037 by 2041. The structure is 47 ft (14.3 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSummit Lake Road
CrossesKennedy Creek
Location0.2 M East of SR8
RouteCounty Highway 14885
CountyThurston County
StateWashington
Coordinates47.04935, -123.14152
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating96 US tons
Inventory rating57 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span46 ft (14 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic671 (2021)
Projected traffic1,037 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$714,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Summit Lake Road over Kennedy Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is Summit Lake Road over Kennedy 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 April 2023.

How much traffic does Summit Lake Road over Kennedy Creek carry?

About 671 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is Summit Lake Road over Kennedy Creek?

The structure is 47 ft (14.3 m) long with a longest span of 46 ft (14 m) and a deck 28 ft wide.

Who owns Summit Lake Road over Kennedy Creek?

It is owned by the County Highway Agency.