US Bridges

Middle Satsop Road over Tornow Branch Satsop R

Good

Grays Harbor County, Washington · 7.1 N Brady · Structure no. 084917000000000

Built
1973
52 years old
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
185 ft
3 main spans
Daily traffic
1,209
2022 count
Owner
County
County Highway Agency

About this bridge

Middle Satsop Road over Tornow Branch Satsop R is a prestressed concrete stringer/multi-beam or girder carrying Middle Satsop Road over Tornow Branch Satsop R in Grays Harbor County, Washington. It was built in 1973, so it is 52 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 1,209 vehicles a day, roughly 5% of them trucks, projected to reach 1,475 by 2042. The structure is 185 ft (56.4 m) long and 29 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesMiddle Satsop Road
CrossesTornow Branch Satsop R
Location7.1 N Brady
RouteCounty Highway 97250
Coordinates47.08556, -123.48972
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum 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 rating53 US tons
Inventory rating31 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length185 ft (56.4 m)
Longest span95 ft (29 m)
Deck width29 ft (8.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,209 (2022)
Projected traffic1,475 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Middle Satsop Road over Tornow Branch Satsop R built?

It was built in 1973, making it 52 years old in 2025.

What condition is Middle Satsop Road over Tornow Branch Satsop R 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 January 2023.

How much traffic does Middle Satsop Road over Tornow Branch Satsop R carry?

About 1,209 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Middle Satsop Road over Tornow Branch Satsop R?

The structure is 185 ft (56.4 m) long with a longest span of 95 ft (29 m) and a deck 29 ft wide.

Who owns Middle Satsop Road over Tornow Branch Satsop R?

It is owned by the County Highway Agency.