US Bridges

CO RD NW 800 over Br N Fk Blackwater

Good

Johnson County, Missouri · S 11 T 47 N R 28 W · Structure no. 14387

Built
1991
34 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
110
2023 count
Owner
County
County Highway Agency

About this bridge

CO RD NW 800 over Br N Fk Blackwater is a steel stringer/multi-beam or girder carrying CO RD NW 800 over Br N Fk Blackwater 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 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 110 vehicles a day, roughly 10% of them trucks, projected to reach 176 by 2043. The structure is 25 ft (7.6 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCO RD NW 800
CrossesBr N Fk Blackwater
LocationS 11 T 47 N R 28 W
RouteCounty Highway 66
Coordinates38.88667, -93.96667
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
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 rating48.6 US tons
Inventory rating33.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width23 ft (7 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2023)
Projected traffic176 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 800 over Br N Fk Blackwater built?

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

What condition is CO RD NW 800 over Br N Fk Blackwater 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 November 2024.

How much traffic does CO RD NW 800 over Br N Fk Blackwater carry?

About 110 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is CO RD NW 800 over Br N Fk Blackwater?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 23 ft wide.

Who owns CO RD NW 800 over Br N Fk Blackwater?

It is owned by the County Highway Agency.