US Bridges

North Shore Road over Great Bend Creek

Good

Mason County, Washington · 13.3 M JCT SR 300 · Structure no. 089304000000000

Built
2022
3 years old
Condition
Good
inspected September 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
513
2020 count
Owner
County
County Highway Agency

About this bridge

North Shore Road over Great Bend Creek is a concrete culvert carrying North Shore Road over Great Bend Creek in Mason County, Washington. It was built in 2022, so it is 3 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 513 vehicles a day, roughly 1% of them trucks, projected to reach 1,000 by 2044. The structure is 24 ft (7.3 m) long and 33 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesNorth Shore Road
CrossesGreat Bend Creek
Location13.3 M JCT SR 300
RouteCounty Highway 70390
Coordinates47.3749, -123.09182
Functional classRural Minor Collector

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.
Culvert8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable 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 rating62.5 US tons
Inventory rating48.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width33 ft (10.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic513 (2020)
Projected traffic1,000 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was North Shore Road over Great Bend Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is North Shore Road over Great Bend 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 North Shore Road over Great Bend Creek carry?

About 513 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is North Shore Road over Great Bend Creek?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 33 ft wide.

Who owns North Shore Road over Great Bend Creek?

It is owned by the County Highway Agency.