US Bridges

Manastash Road over North Fork Creek

Good

Kittitas County, Washington · 4.74 West Cove Road · Structure no. 088828000000000

Built
2016
9 years old
Condition
Good
inspected March 2024
Type
Slab
Concrete
Length
39 ft
1 main span
Daily traffic
270
2018 count
Owner
County
County Highway Agency

About this bridge

Manastash Road over North Fork Creek is a concrete slab carrying Manastash Road over North Fork Creek in Kittitas County, Washington. It was built in 2016, so it is 9 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 270 vehicles a day, roughly 24% of them trucks, projected to reach 715 by 2038. The structure is 39 ft (11.9 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesManastash Road
CrossesNorth Fork Creek
Location4.74 West Cove Road
RouteCounty Highway 95301
Coordinates46.96313, -120.76356
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment6: Equal to present minimum criteria
Operating rating75.7 US tons
Inventory rating58.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length39 ft (11.9 m)
Longest span37 ft (11.3 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic270 (2018)
Projected traffic715 by 2038
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Manastash Road over North Fork Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is Manastash Road over North 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 March 2024.

How much traffic does Manastash Road over North Fork Creek carry?

About 270 vehicles per day (2018 count), of which roughly 24% are trucks.

How long is Manastash Road over North Fork Creek?

The structure is 39 ft (11.9 m) long with a longest span of 37 ft (11.3 m) and a deck 28 ft wide.

Who owns Manastash Road over North Fork Creek?

It is owned by the County Highway Agency.