US Bridges

Spruce Creek RD over Mill Creek

Good

Cowlitz County, Washington · 0.01 W Mill Crk RD (1.00) · Structure no. 087200000000000

Built
2004
21 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
79 ft
1 main span
Daily traffic
350
2020 count
Owner
County
County Highway Agency

About this bridge

Spruce Creek RD over Mill Creek is a prestressed concrete stringer/multi-beam or girder carrying Spruce Creek RD over Mill Creek in Cowlitz County, Washington. It was built in 2004, so it is 21 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 350 vehicles a day, roughly 17% of them trucks, projected to reach 475 by 2041. The structure is 79 ft (24.1 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSpruce Creek RD
CrossesMill Creek
Location0.01 W Mill Crk RD (1.00)
RouteCounty Highway 20410
Coordinates46.19611, -123.19278
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.2 US tons
Inventory rating58.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length79 ft (24.1 m)
Longest span76 ft (23.2 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2020)
Projected traffic475 by 2041
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$1.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Spruce Creek RD over Mill Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is Spruce Creek RD 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 September 2024.

How much traffic does Spruce Creek RD over Mill Creek carry?

About 350 vehicles per day (2020 count), of which roughly 17% are trucks.

How long is Spruce Creek RD over Mill Creek?

The structure is 79 ft (24.1 m) long with a longest span of 76 ft (23.2 m) and a deck 31 ft wide.

Who owns Spruce Creek RD over Mill Creek?

It is owned by the County Highway Agency.