US Bridges

County RD 624 over Long Br

PoorPosted for load

Monroe County, Missouri · S 18 T 53 N R 8 W · Structure no. 12722

Built
1914
111 years old
Condition
Poor
inspected June 2024
Type
Truss - Thru
Steel
Length
170 ft
1 main span
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 624 over Long Br is a steel truss - thru carrying County RD 624 over Long Br in Monroe County, Missouri. It was built in 1914, so it is 111 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 25 vehicles a day, roughly 10% of them trucks, projected to reach 31 by 2043. The structure is 170 ft (51.8 m) long and 12 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty RD 624
CrossesLong Br
LocationS 18 T 53 N R 8 W
RouteCounty Highway 18
CountyMonroe County
StateMissouri
Coordinates39.37269, -91.84128
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19.8 US tons
Inventory rating12.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadOther
Structure length170 ft (51.8 m)
Longest span112 ft (34.1 m)
Deck width12 ft (3.6 m)
Roadway width11 ft (3.5 m)
Vertical clearance over deck14 ft (4.4 m)

Traffic and service

Average daily traffic25 (2023)
Projected traffic31 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 624 over Long Br built?

It was built in 1914, making it 111 years old in 2025.

What condition is County RD 624 over Long Br in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does County RD 624 over Long Br carry?

About 25 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 624 over Long Br?

The structure is 170 ft (51.8 m) long with a longest span of 112 ft (34.1 m) and a deck 12 ft wide.

Who owns County RD 624 over Long Br?

It is owned by the County Highway Agency.