US Bridges

Mason Lake Rd. over Cranberry Creek

Good

Mason County, Washington · 2.68 N JCT SR 3 · Structure no. 086011000000000

Built
1993
32 years old
Condition
Good
inspected April 2024
Type
Culvert
Steel
Length
25 ft
1 main span
Daily traffic
1,783
2020 count
Owner
County
County Highway Agency

About this bridge

Mason Lake Rd. over Cranberry Creek is a steel culvert carrying Mason Lake Rd. over Cranberry Creek in Mason County, Washington. It was built in 1993, so it is 32 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 1,783 vehicles a day, roughly 5% of them trucks, projected to reach 3,000 by 2040. The structure is 25 ft (7.6 m) long and 40 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

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CarriesMason Lake Rd.
CrossesCranberry Creek
Location2.68 N JCT SR 3
RouteCounty Highway 52210
CountyMason County
StateWashington
Coordinates47.27906, -123.04533
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.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,783 (2020)
Projected traffic3,000 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$50,000 (2075 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mason Lake Rd. over Cranberry Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is Mason Lake Rd. over Cranberry 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 April 2024.

How much traffic does Mason Lake Rd. over Cranberry Creek carry?

About 1,783 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Mason Lake Rd. over Cranberry Creek?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 40 ft wide.

Who owns Mason Lake Rd. over Cranberry Creek?

It is owned by the County Highway Agency.