US Bridges

NE Santa Rosa RD over Muddy CR

PoorPosted for load

DeKalb County, Missouri · S 24 T 60 N R 30 W · Structure no. 17806

Built
1930
95 years old
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
5
2024 count
Owner
County
County Highway Agency

About this bridge

NE Santa Rosa RD over Muddy CR is a steel stringer/multi-beam or girder carrying NE Santa Rosa RD over Muddy CR in DeKalb 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 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 5 vehicles a day, roughly 10% of them trucks, projected to reach 6 by 2044. The structure is 29 ft (8.8 m) long and 16 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNE Santa Rosa RD
CrossesMuddy CR
LocationS 24 T 60 N R 30 W
RouteCounty Highway 163
CountyDeKalb County
StateMissouri
Coordinates39.9953, -94.20407
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionDecember 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating12.9 US tons
Inventory rating5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width16 ft (5 m)
Roadway width16 ft (5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic6 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$272,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NE Santa Rosa RD over Muddy CR built?

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

What condition is NE Santa Rosa RD over Muddy 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 December 2024.

How much traffic does NE Santa Rosa RD over Muddy CR carry?

About 5 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is NE Santa Rosa RD over Muddy CR?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 16 ft wide.

Who owns NE Santa Rosa RD over Muddy CR?

It is owned by the County Highway Agency.