US Bridges

Concord Ave over Blackwater Rvr

FairPosted for load

Saline County, Missouri · S 13 T 48 N R 23 W · Structure no. 23875

Built
1930
95 years old
Condition
Fair
inspected April 2024
Type
Truss - Thru
Steel
Length
241 ft
1 main span
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

Concord Ave over Blackwater Rvr is a steel truss - thru carrying Concord Ave over Blackwater Rvr in Saline County, Missouri. It was built in 1930, so it is 95 years old, older 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. Its operating status is: posted for load restriction.

It carries about 35 vehicles a day, roughly 10% of them trucks, projected to reach 39 by 2044. The structure is 241 ft (73.5 m) long and 14 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesConcord Ave
CrossesBlackwater Rvr
LocationS 13 T 48 N R 23 W
RouteCounty Highway 439
CountySaline County
StateMissouri
Coordinates38.94155, -93.39617
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
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 alignment6: Equal to present minimum criteria
Operating rating9.9 US tons
Inventory rating6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadOther
Structure length241 ft (73.5 m)
Longest span140 ft (42.7 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (4 m)
Vertical clearance over deck18 ft (5.5 m)

Traffic and service

Average daily traffic35 (2024)
Projected traffic39 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Concord Ave over Blackwater Rvr built?

It was built in 1930, making it 95 years old in 2025.

What condition is Concord Ave 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 April 2024.

How much traffic does Concord Ave over Blackwater Rvr carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Concord Ave over Blackwater Rvr?

The structure is 241 ft (73.5 m) long with a longest span of 140 ft (42.7 m) and a deck 14 ft wide.

Who owns Concord Ave over Blackwater Rvr?

It is owned by the County Highway Agency and maintained by the Other Local Agency.