US Bridges

Walnut ST over Mna RR

PoorClosed to traffic

Jasper County, Missouri · S 4 T 28 N R 31 W · Structure no. 14651

Built
1920
105 years old
Condition
Poor
inspected February 2019
Type
Stringer/Multi-beam or Girder
Steel
Length
56 ft
3 main spans
Daily traffic
200
2023 count
Owner
Railroad
Railroad

About this bridge

Walnut ST over Mna RR is a steel stringer/multi-beam or girder carrying Walnut ST over Mna RR in Jasper County, Missouri. It was built in 1920, so it is 105 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 2 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 200 vehicles a day, roughly 10% of them trucks, projected to reach 300 by 2043. The structure is 56 ft (17.1 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesWalnut ST
CrossesMna RR
LocationS 4 T 28 N R 31 W
RouteCity Street 0
CountyJasper County
StateMissouri
Coordinates37.17511, -94.31847
Functional classUrban 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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Last inspectionFebruary 2019
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourBridge not over waterway
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans3
Design loadOther
Structure length56 ft (17.1 m)
Longest span19 ft (5.8 m)
Deck width28 ft (8.6 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic300 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerRailroad
Maintained byRailroad
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$438,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Walnut ST over Mna RR built?

It was built in 1920, making it 105 years old in 2025.

What condition is Walnut ST over Mna RR 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 February 2019.

How much traffic does Walnut ST over Mna RR carry?

About 200 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Walnut ST over Mna RR?

The structure is 56 ft (17.1 m) long with a longest span of 19 ft (5.8 m) and a deck 28 ft wide.

Who owns Walnut ST over Mna RR?

It is owned by the Railroad.