US Bridges

140th ST over Minerva Creek

PoorPosted for load

Marshall County, Iowa · 085202703 · Structure no. 000000000244550

Built
1912
113 years old
Condition
Poor
inspected November 2024
Type
Arch - Deck
Concrete
Length
68 ft
1 main span
Daily traffic
62
2022 count
Owner
County
County Highway Agency

About this bridge

140th ST over Minerva Creek is a concrete arch - deck carrying 140th ST over Minerva Creek in Marshall County, Iowa. It was built in 1912, so it is 113 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 3 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 62 vehicles a day, projected to reach 62 by 2044. The structure is 68 ft (20.7 m) long and 17 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
Carries140th ST
CrossesMinerva Creek
Location085202703
RouteCounty Highway 0
CountyMarshall County
StateIowa
Coordinates42.15104, -93.16551
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating27.7 US tons
Inventory rating20 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length68 ft (20.7 m)
Longest span64 ft (19.5 m)
Deck width17 ft (5.3 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2022)
Projected traffic62 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$809,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 140th ST over Minerva Creek built?

It was built in 1912, making it 113 years old in 2025.

What condition is 140th ST over Minerva Creek 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 2024.

How much traffic does 140th ST over Minerva Creek carry?

About 62 vehicles per day (2022 count).

How long is 140th ST over Minerva Creek?

The structure is 68 ft (20.7 m) long with a longest span of 64 ft (19.5 m) and a deck 17 ft wide.

Who owns 140th ST over Minerva Creek?

It is owned by the County Highway Agency.