US Bridges

Kellog Hollow Rd. over Kellog Hollow

Fair

Columbia County, Washington · 5.6 S JCT SR 261 · Structure no. 080843000000000

Built
1966
59 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
300
2019 count
Owner
County
County Highway Agency

About this bridge

Kellog Hollow Rd. over Kellog Hollow is a steel stringer/multi-beam or girder carrying Kellog Hollow Rd. over Kellog Hollow in Columbia County, Washington. It was built in 1966, so it is 59 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 300 vehicles a day, roughly 15% of them trucks, projected to reach 350 by 2041. The structure is 40 ft (12.2 m) long and 28 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesKellog Hollow Rd.
CrossesKellog Hollow
Location5.6 S JCT SR 261
RouteCounty Highway 92250
CountyColumbia County
StateWashington
Coordinates46.45258, -118.08603
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating31.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span38 ft (11.7 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2019)
Projected traffic350 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$532,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Kellog Hollow Rd. over Kellog Hollow built?

It was built in 1966, making it 59 years old in 2025.

What condition is Kellog Hollow Rd. over Kellog Hollow in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.

How much traffic does Kellog Hollow Rd. over Kellog Hollow carry?

About 300 vehicles per day (2019 count), of which roughly 15% are trucks.

How long is Kellog Hollow Rd. over Kellog Hollow?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.7 m) and a deck 28 ft wide.

Who owns Kellog Hollow Rd. over Kellog Hollow?

It is owned by the County Highway Agency.