US Bridges

Tulips Road over Humptulips Overflow

Good

Grays Harbor County, Washington · 0.0 W JCT 9423 · Structure no. 088483000000000

Built
2012
13 years old
Condition
Good
inspected September 2024
Type
Culvert
Steel
Length
21 ft
3 main spans
Daily traffic
50
2020 count
Owner
County
County Highway Agency

About this bridge

Tulips Road over Humptulips Overflow is a steel culvert carrying Tulips Road over Humptulips Overflow in Grays Harbor County, Washington. It was built in 2012, so it is 13 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 50 vehicles a day, roughly 5% of them trucks, projected to reach 61 by 2044. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesTulips Road
CrossesHumptulips Overflow
Location0.0 W JCT 9423
RouteCounty Highway 42690
Coordinates47.07194, -124.04944
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating106.8 US tons
Inventory rating104.3 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 25 or greater
Structure length21 ft (6.4 m)
Longest span5 ft (1.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2020)
Projected traffic61 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed1.2 mi (2 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$1.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Tulips Road over Humptulips Overflow built?

It was built in 2012, making it 13 years old in 2025.

What condition is Tulips Road over Humptulips Overflow 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 Tulips Road over Humptulips Overflow carry?

About 50 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Tulips Road over Humptulips Overflow?

The structure is 21 ft (6.4 m) long with a longest span of 5 ft (1.6 m).

Who owns Tulips Road over Humptulips Overflow?

It is owned by the County Highway Agency.