US Bridges

Mo 13 S over Is 35

Poor

Harrison County, Missouri · S 35 T 63 N R 28 W · Structure no. 1610

Built
1973
52 years old, rebuilt 2009
Condition
Poor
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
260 ft
2 main spans
Daily traffic
1,898
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 13 S over Is 35 is a steel continuous stringer/multi-beam or girder carrying Mo 13 S over Is 35 in Harrison County, Missouri. It was built in 1973 and reconstructed in 2009, so it is 52 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.

It carries about 1,898 vehicles a day, roughly 14% of them trucks, projected to reach 2,467 by 2044. The structure is 260 ft (79.2 m) long and 43 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
CarriesMo 13 S
CrossesIs 35
LocationS 35 T 63 N R 28 W
RouteState Highway 13
CountyHarrison County
StateMissouri
Coordinates40.20997, -94.01354
Functional classRural Major Collector

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating18.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadH 20
Structure length260 ft (79.2 m)
Longest span91 ft (27.7 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,898 (2024)
Projected traffic2,467 by 2044
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed21.1 mi (34 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$2.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mo 13 S over Is 35 built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2009.

What condition is Mo 13 S over Is 35 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 October 2023.

How much traffic does Mo 13 S over Is 35 carry?

About 1,898 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is Mo 13 S over Is 35?

The structure is 260 ft (79.2 m) long with a longest span of 91 ft (27.7 m) and a deck 43 ft wide.

Who owns Mo 13 S over Is 35?

It is owned by the State Highway Agency.