US Bridges

Lake Helena RD SW over Muck Fork Creek

Good

Kitsap County, Washington · W of J.M. Dickenson · Structure no. 088283000000000

Built
2011
14 years old
Condition
Good
inspected July 2023
Type
Slab
Prestressed Concrete Continuous
Length
52 ft
1 main span
Daily traffic
1,401
2021 count
Owner
County
County Highway Agency

About this bridge

Lake Helena RD SW over Muck Fork Creek is a prestressed concrete continuous slab carrying Lake Helena RD SW over Muck Fork Creek in Kitsap County, Washington. It was built in 2011, so it is 14 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 1,401 vehicles a day, roughly 19% of them trucks, projected to reach 1,382 by 2042. The structure is 52 ft (15.8 m) long and 36 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesLake Helena RD SW
CrossesMuck Fork Creek
LocationW of J.M. Dickenson
RouteCounty Highway 21320
Coordinates47.4399, -122.73607
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 inspectionJuly 2023
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 rating77.2 US tons
Inventory rating59.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length52 ft (15.8 m)
Longest span50 ft (15.2 m)
Deck width36 ft (11 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,401 (2021)
Projected traffic1,382 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$939,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lake Helena RD SW over Muck Fork Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is Lake Helena RD SW over Muck Fork 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 July 2023.

How much traffic does Lake Helena RD SW over Muck Fork Creek carry?

About 1,401 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is Lake Helena RD SW over Muck Fork Creek?

The structure is 52 ft (15.8 m) long with a longest span of 50 ft (15.2 m) and a deck 36 ft wide.

Who owns Lake Helena RD SW over Muck Fork Creek?

It is owned by the County Highway Agency.