US Bridges

Park Road over Seasonal Creek

Good

Thurston County, Washington · 1.0 Mi. West of SR 121 · Structure no. 002005490000000

Built
2014
11 years old
Condition
Good
inspected May 2023
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
75
2020 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Park Road over Seasonal Creek is a prestressed concrete slab carrying Park Road over Seasonal Creek in Thurston County, Washington. It was built in 2014, so it is 11 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 75 vehicles a day, projected to reach 78 by 2040. The structure is 30 ft (9.1 m) long and 13 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesPark Road
CrossesSeasonal Creek
Location1.0 Mi. West of SR 121
RouteState Lands Road 121
Coordinates46.91475, -122.91945
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width13 ft (4.1 m)
Roadway width12 ft (3.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2020)
Projected traffic78 by 2040
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Park Road over Seasonal Creek built?

It was built in 2014, making it 11 years old in 2025.

What condition is Park Road over Seasonal 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 May 2023.

How much traffic does Park Road over Seasonal Creek carry?

About 75 vehicles per day (2020 count).

How long is Park Road over Seasonal Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 13 ft wide.

Who owns Park Road over Seasonal Creek?

It is owned by the State Park, Forest, or Reservation Agency.