US Bridges

Local Rd. M-20 over Black Vermillion River

Good

Nemaha County, Kansas · 1.0S 5.0W of Centralia · Structure no. 000660939003401

Built
1979
46 years old
Condition
Good
inspected March 2024
Type
Slab
Concrete Continuous
Length
122 ft
3 main spans
Daily traffic
10
2008 count
Owner
County
County Highway Agency

About this bridge

Local Rd. M-20 over Black Vermillion River is a concrete continuous slab carrying Local Rd. M-20 over Black Vermillion River in Nemaha County, Kansas. It was built in 1979, so it is 46 years old, younger 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 10 vehicles a day, projected to reach 14 by 2044. The structure is 122 ft (37.2 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLocal Rd. M-20
CrossesBlack Vermillion River
Location1.0S 5.0W of Centralia
RouteCounty Highway 0
CountyNemaha County
StateKansas
Coordinates39.70916, -96.21986
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.7 US tons
Inventory rating25.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length122 ft (37.2 m)
Longest span48 ft (14.5 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic10 (2008)
Projected traffic14 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local Rd. M-20 over Black Vermillion River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Local Rd. M-20 over Black Vermillion River 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 March 2024.

How much traffic does Local Rd. M-20 over Black Vermillion River carry?

About 10 vehicles per day (2008 count).

How long is Local Rd. M-20 over Black Vermillion River?

The structure is 122 ft (37.2 m) long with a longest span of 48 ft (14.5 m) and a deck 26 ft wide.

Who owns Local Rd. M-20 over Black Vermillion River?

It is owned by the County Highway Agency.