US Bridges

US77 HWY over Big Blue River Drainage

Good

Marshall County, Kansas · 2.38 MI N Wjct US36 · Structure no. 999907700580161

Built
1939
86 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
35 ft
4 main spans
Daily traffic
1,485
2023 count
Owner
State
State Highway Agency

About this bridge

US77 HWY over Big Blue River Drainage is a concrete culvert carrying US77 HWY over Big Blue River Drainage in Marshall County, Kansas. It was built in 1939, so it is 86 years old, older than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,485 vehicles a day, roughly 15% of them trucks, projected to reach 1,885 by 2044. The structure is 35 ft (10.6 m) long and 34 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesUS77 HWY
CrossesBig Blue River Drainage
Location2.38 MI N Wjct US36
RouteU.S. Route 77
StateKansas
Coordinates39.87639, -96.66639
Functional classRural Principal Arterial - Other

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length35 ft (10.6 m)
Longest span8 ft (2.4 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,485 (2023)
Projected traffic1,885 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US77 HWY over Big Blue River Drainage built?

It was built in 1939, making it 86 years old in 2025.

What condition is US77 HWY over Big Blue River Drainage 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 May 2023.

How much traffic does US77 HWY over Big Blue River Drainage carry?

About 1,485 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is US77 HWY over Big Blue River Drainage?

The structure is 35 ft (10.6 m) long with a longest span of 8 ft (2.4 m) and a deck 34 ft wide.

Who owns US77 HWY over Big Blue River Drainage?

It is owned by the State Highway Agency.