US Bridges

Imhoff RD over Lamine Rvr

PoorClosed to traffic

Cooper County, Missouri · S 12 T 48 N R 19 W · Structure no. 12954

Built
1907
118 years old
Condition
Poor
inspected March 2012
Type
Truss - Thru
Steel
Length
390 ft
2 main spans
Daily traffic
25
2024 count
Owner
County
County Highway Agency

About this bridge

Imhoff RD over Lamine Rvr is a steel truss - thru carrying Imhoff RD over Lamine Rvr in Cooper County, Missouri. It was built in 1907, so it is 118 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 3 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: closed to all traffic.

It carries about 25 vehicles a day, roughly 10% of them trucks, projected to reach 33 by 2044. The structure is 390 ft (118.9 m) long and 14 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesImhoff RD
CrossesLamine Rvr
LocationS 12 T 48 N R 19 W
RouteCounty Highway 25
CountyCooper County
StateMissouri
Coordinates38.94626, -92.94832
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2012
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans2 (+3 approach)
Design loadOther
Structure length390 ft (118.9 m)
Longest span160 ft (48.8 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deck15 ft (4.5 m)

Traffic and service

Average daily traffic25 (2024)
Projected traffic33 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Imhoff RD over Lamine Rvr built?

It was built in 1907, making it 118 years old in 2025.

What condition is Imhoff RD over Lamine Rvr 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 March 2012.

How much traffic does Imhoff RD over Lamine Rvr carry?

About 25 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Imhoff RD over Lamine Rvr?

The structure is 390 ft (118.9 m) long with a longest span of 160 ft (48.8 m) and a deck 14 ft wide.

Who owns Imhoff RD over Lamine Rvr?

It is owned by the County Highway Agency.