US Bridges

Mcneilly RD/6240 over Frog Creek

Good

Whitman County, Washington · 5.10 MI SW Endicott RD · Structure no. 087554000000000

Built
2007
18 years old
Condition
Good
inspected January 2024
Type
Culvert
Concrete
Length
32 ft
1 main span
Daily traffic
53
2021 count
Owner
County
County Highway Agency

About this bridge

Mcneilly RD/6240 over Frog Creek is a concrete culvert carrying Mcneilly RD/6240 over Frog Creek in Whitman County, Washington. It was built in 2007, so it is 18 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 53 vehicles a day, roughly 25% of them trucks, projected to reach 54 by 2044. The structure is 32 ft (9.9 m) long and 29 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesMcneilly RD/6240
CrossesFrog Creek
Location5.10 MI SW Endicott RD
RouteCounty Highway 62400
Coordinates46.85365, -117.53195
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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length32 ft (9.9 m)
Longest span30 ft (9.1 m)
Deck width29 ft (8.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53 (2021)
Projected traffic54 by 2044
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$462,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mcneilly RD/6240 over Frog Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Mcneilly RD/6240 over Frog 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 January 2024.

How much traffic does Mcneilly RD/6240 over Frog Creek carry?

About 53 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is Mcneilly RD/6240 over Frog Creek?

The structure is 32 ft (9.9 m) long with a longest span of 30 ft (9.1 m) and a deck 29 ft wide.

Who owns Mcneilly RD/6240 over Frog Creek?

It is owned by the County Highway Agency.