US Bridges

Gate RD over Baker Creek

Good

Thurston County, Washington · 0.52 S. of Mima Creek · Structure no. 089288000000000

Built
2021
4 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
508
2021 count
Owner
County
County Highway Agency

About this bridge

Gate RD over Baker Creek is a steel stringer/multi-beam or girder carrying Gate RD over Baker Creek in Thurston County, Washington. It was built in 2021, so it is 4 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 508 vehicles a day, roughly 10% of them trucks, projected to reach 755 by 2041. The structure is 28 ft (8.5 m) long and 28 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesGate RD
CrossesBaker Creek
Location0.52 S. of Mima Creek
RouteCounty Highway 11745
Coordinates46.86206, -123.08918
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating42.9 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic508 (2021)
Projected traffic755 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Gate RD over Baker Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is Gate RD over Baker 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 2024.

How much traffic does Gate RD over Baker Creek carry?

About 508 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Gate RD over Baker Creek?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 28 ft wide.

Who owns Gate RD over Baker Creek?

It is owned by the County Highway Agency.