US Bridges

Staley Mound RD over Br of Big CR

PoorPosted for load

Cass County, Missouri · S 11 T 45 N R 30 W · Structure no. 17623

Built
1930
95 years old, rebuilt 1960
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
120
2024 count
Owner
County
County Highway Agency

About this bridge

Staley Mound RD over Br of Big CR is a steel stringer/multi-beam or girder carrying Staley Mound RD over Br of Big CR in Cass County, Missouri. It was built in 1930 and reconstructed in 1960, 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 120 vehicles a day, roughly 5% of them trucks, projected to reach 192 by 2044. The structure is 31 ft (9.4 m) long and 14 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesStaley Mound RD
CrossesBr of Big CR
LocationS 11 T 45 N R 30 W
RouteCounty Highway 158
CountyCass County
StateMissouri
Coordinates38.72354, -94.20014
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.8 US tons
Inventory rating18.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length31 ft (9.4 m)
Longest span28 ft (8.5 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2024)
Projected traffic192 by 2044
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway 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$289,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Staley Mound RD over Br of Big CR built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1960.

What condition is Staley Mound RD over Br of Big 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 April 2023.

How much traffic does Staley Mound RD over Br of Big CR carry?

About 120 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Staley Mound RD over Br of Big CR?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.5 m) and a deck 14 ft wide.

Who owns Staley Mound RD over Br of Big CR?

It is owned by the County Highway Agency.