US Bridges

Frog Hollow over Burlingame Ditch

GoodPosted for load

Walla Walla County, Washington · 00.5 E of Mcdonald RD · Structure no. 086820000000000

Built
2002
23 years old
Condition
Good
inspected September 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
22 ft
1 main span
Daily traffic
560
2024 count
Owner
County
County Highway Agency

About this bridge

Frog Hollow over Burlingame Ditch is a aluminum, wrought iron, or cast iron culvert carrying Frog Hollow over Burlingame Ditch in Walla Walla County, Washington. It was built in 2002, so it is 23 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. Its operating status is: posted for load restriction.

It carries about 560 vehicles a day, roughly 5% of them trucks, projected to reach 832 by 2046. The structure is 22 ft (6.8 m) long and 36 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesFrog Hollow
CrossesBurlingame Ditch
Location00.5 E of Mcdonald RD
RouteCounty Highway 92100
Coordinates46.02005, -118.54454
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating22.8 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length22 ft (6.8 m)
Longest span22 ft (6.8 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic560 (2024)
Projected traffic832 by 2046
Trucks5%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Frog Hollow over Burlingame Ditch built?

It was built in 2002, making it 23 years old in 2025.

What condition is Frog Hollow over Burlingame Ditch 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 September 2024.

How much traffic does Frog Hollow over Burlingame Ditch carry?

About 560 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Frog Hollow over Burlingame Ditch?

The structure is 22 ft (6.8 m) long with a longest span of 22 ft (6.8 m) and a deck 36 ft wide.

Who owns Frog Hollow over Burlingame Ditch?

It is owned by the County Highway Agency.