US Bridges

CO RD NW 1501 over Blackwater Rvr

Fair

Johnson County, Missouri · S 4 T 47 N R 28 W · Structure no. 12498

Built
1991
34 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
41 ft
1 main span
Daily traffic
239
2023 count
Owner
County
County Highway Agency

About this bridge

CO RD NW 1501 over Blackwater Rvr is a steel stringer/multi-beam or girder carrying CO RD NW 1501 over Blackwater Rvr in Johnson County, Missouri. It was built in 1991, so it is 34 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 5 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 239 vehicles a day, roughly 10% of them trucks, projected to reach 382 by 2043. The structure is 41 ft (12.5 m) long and 23 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCO RD NW 1501
CrossesBlackwater Rvr
LocationS 4 T 47 N R 28 W
RouteCounty Highway 12
CountyJohnson County
StateMissouri
Coordinates38.90732, -94.02052
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length41 ft (12.5 m)
Longest span39 ft (11.9 m)
Deck width23 ft (7.1 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic239 (2023)
Projected traffic382 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 1501 over Blackwater Rvr built?

It was built in 1991, making it 34 years old in 2025.

What condition is CO RD NW 1501 over Blackwater Rvr 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 1501 over Blackwater Rvr carry?

About 239 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is CO RD NW 1501 over Blackwater Rvr?

The structure is 41 ft (12.5 m) long with a longest span of 39 ft (11.9 m) and a deck 23 ft wide.

Who owns CO RD NW 1501 over Blackwater Rvr?

It is owned by the County Highway Agency.