US Bridges

Mill Creek Road over Mill Creek

Good

Pacific County, Washington · 10.2 SE JCT 6 & 101 · Structure no. 086077000000000

Built
1994
31 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
90 ft
1 main span
Daily traffic
51
2023 count
Owner
County
County Highway Agency

About this bridge

Mill Creek Road over Mill Creek is a prestressed concrete stringer/multi-beam or girder carrying Mill Creek Road over Mill Creek in Pacific County, Washington. It was built in 1994, so it is 31 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 51 vehicles a day, roughly 30% of them trucks, projected to reach 76 by 2043. The structure is 90 ft (27.4 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesMill Creek Road
CrossesMill Creek
Location10.2 SE JCT 6 & 101
RouteCounty Highway 69800
Coordinates46.62431, -123.56772
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating34 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span88 ft (26.7 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2023)
Projected traffic76 by 2043
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Creek Road over Mill Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Mill Creek Road over Mill 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 June 2023.

How much traffic does Mill Creek Road over Mill Creek carry?

About 51 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is Mill Creek Road over Mill Creek?

The structure is 90 ft (27.4 m) long with a longest span of 88 ft (26.7 m) and a deck 31 ft wide.

Who owns Mill Creek Road over Mill Creek?

It is owned by the County Highway Agency.