US Bridges

Graf Road over Scammon Creek

Good

Lewis County, Washington · 0.4 W Centrlia · Structure no. 089176000000000

Built
2020
5 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete
Length
62 ft
1 main span
Daily traffic
480
2018 count
Owner
County
County Highway Agency

About this bridge

Graf Road over Scammon Creek is a concrete slab carrying Graf Road over Scammon Creek in Lewis County, Washington. It was built in 2020, so it is 5 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 480 vehicles a day, roughly 5% of them trucks, projected to reach 893 by 2039. The structure is 62 ft (18.9 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesGraf Road
CrossesScammon Creek
Location0.4 W Centrlia
RouteCounty Highway 91025
Coordinates46.70632, -122.99576
Functional classUrban 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 inspectionOctober 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 rating89.6 US tons
Inventory rating69.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length62 ft (18.9 m)
Longest span51 ft (15.5 m)
Deck width30 ft (9.2 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2018)
Projected traffic893 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Graf Road over Scammon Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is Graf Road over Scammon 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 October 2024.

How much traffic does Graf Road over Scammon Creek carry?

About 480 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Graf Road over Scammon Creek?

The structure is 62 ft (18.9 m) long with a longest span of 51 ft (15.5 m) and a deck 30 ft wide.

Who owns Graf Road over Scammon Creek?

It is owned by the County Highway Agency.