US Bridges

County RD 275 over Otter CR

PoorPosted for load

Monroe County, Missouri · S 21 T 55 N R 10 W · Structure no. 23347

Built
1910
115 years old
Condition
Poor
inspected May 2024
Type
Truss - Thru
Steel
Length
97 ft
1 main span
Daily traffic
15
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 275 over Otter CR is a steel truss - thru carrying County RD 275 over Otter CR in Monroe County, Missouri. It was built in 1910, so it is 115 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 19 by 2043. The structure is 97 ft (29.6 m) long and 12 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCounty RD 275
CrossesOtter CR
LocationS 21 T 55 N R 10 W
RouteCounty Highway 405
CountyMonroe County
StateMissouri
Coordinates39.53147, -92.02361
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
Deck8 Very GoodNo problems noted.
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating6.9 US tons
Inventory rating5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+3 approach)
Design loadOther
Structure length97 ft (29.6 m)
Longest span60 ft (18.3 m)
Deck width12 ft (3.7 m)
Roadway width12 ft (3.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2023)
Projected traffic19 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$710,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 275 over Otter CR built?

It was built in 1910, making it 115 years old in 2025.

What condition is County RD 275 over Otter CR 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 May 2024.

How much traffic does County RD 275 over Otter CR carry?

About 15 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 275 over Otter CR?

The structure is 97 ft (29.6 m) long with a longest span of 60 ft (18.3 m) and a deck 12 ft wide.

Who owns County RD 275 over Otter CR?

It is owned by the County Highway Agency.