US Bridges

Mill Creek Road over Mill Creek

Good

Pacific County, Washington · 7.1 SE JCT 6 & 101 · Structure no. 086138000000000

Built
1995
30 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
110 ft
1 main span
Daily traffic
143
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 1995, so it is 30 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 143 vehicles a day, roughly 30% of them trucks, projected to reach 213 by 2043. The structure is 110 ft (33.5 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesMill Creek Road
CrossesMill Creek
Location7.1 SE JCT 6 & 101
RouteCounty Highway 69800
Coordinates46.64297, -123.61611
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating34 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span108 ft (32.8 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic143 (2023)
Projected traffic213 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 statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Creek Road over Mill Creek built?

It was built in 1995, making it 30 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 143 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is Mill Creek Road over Mill Creek?

The structure is 110 ft (33.5 m) long with a longest span of 108 ft (32.8 m) and a deck 31 ft wide.

Who owns Mill Creek Road over Mill Creek?

It is owned by the County Highway Agency.