US Bridges

Local over Br Minerva CR

PoorPosted for load

Marshall County, Iowa · 085200502 · Structure no. 000000000244400

Built
1919
106 years old, rebuilt 1955
Condition
Poor
inspected November 2023
Type
Truss - Thru
Steel
Length
102 ft
1 main span
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Br Minerva CR is a steel truss - thru carrying Local over Br Minerva CR in Marshall County, Iowa. It was built in 1919 and reconstructed in 1955, so it is 106 years old, older than the Iowa average of 45.5 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 30 vehicles a day, projected to reach 30 by 2043. The structure is 102 ft (31.1 m) long and 18 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesLocal
CrossesBr Minerva CR
Location085200502
RouteCounty Highway 0
StateIowa
Coordinates42.19526, -93.21471
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18.8 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length102 ft (31.1 m)
Longest span100 ft (30.5 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (5 m)
Vertical clearance over deck10 ft (3.2 m)

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Br Minerva CR built?

It was built in 1919, making it 106 years old in 2025. It was reconstructed in 1955.

What condition is Local over Br Minerva 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 November 2023.

How much traffic does Local over Br Minerva CR carry?

About 30 vehicles per day (2022 count).

How long is Local over Br Minerva CR?

The structure is 102 ft (31.1 m) long with a longest span of 100 ft (30.5 m) and a deck 18 ft wide.

Who owns Local over Br Minerva CR?

It is owned by the County Highway Agency.