US Bridges

CO RD NW 251 over Br of Blackwater R

Fair

Johnson County, Missouri · S 16 T 46 N R 26 W · Structure no. 28158

Built
1997
28 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
300
2023 count
Owner
County
County Highway Agency

About this bridge

CO RD NW 251 over Br of Blackwater R is a steel stringer/multi-beam or girder carrying CO RD NW 251 over Br of Blackwater R in Johnson County, Missouri. It was built in 1997, so it is 28 years old, younger than the Missouri average of 45.1 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 5% of them trucks, projected to reach 480 by 2043. The structure is 26 ft (7.9 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCO RD NW 251
CrossesBr of Blackwater R
LocationS 16 T 46 N R 26 W
RouteCounty Highway 242
CountyJohnson County
StateMissouri
Coordinates38.77919, -93.79154
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length26 ft (7.9 m)
Longest span23 ft (7 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic480 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 CO RD NW 251 over Br of Blackwater R built?

It was built in 1997, making it 28 years old in 2025.

What condition is CO RD NW 251 over Br of Blackwater R 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 November 2024.

How much traffic does CO RD NW 251 over Br of Blackwater R carry?

About 300 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is CO RD NW 251 over Br of Blackwater R?

The structure is 26 ft (7.9 m) long with a longest span of 23 ft (7 m) and a deck 27 ft wide.

Who owns CO RD NW 251 over Br of Blackwater R?

It is owned by the County Highway Agency.