US Bridges

Local Road over Minor Drainage

PoorPosted for load

Montgomery County, Iowa · 072393301 · Structure no. 000000000255931

Built
1930
95 years old, rebuilt 1993
Condition
Poor
inspected May 2024
Type
Truss - Thru
Steel
Length
118 ft
1 main span
Daily traffic
61
2021 count
Owner
County
County Highway Agency

About this bridge

Local Road over Minor Drainage is a steel truss - thru carrying Local Road over Minor Drainage in Montgomery County, Iowa. It was built in 1930 and reconstructed in 1993, so it is 95 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 61 vehicles a day, projected to reach 61 by 2044. The structure is 118 ft (36 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesLocal Road
CrossesMinor Drainage
Location072393301
RouteCounty Highway 0
StateIowa
Coordinates41.00173, -95.34047
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.
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 inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating11.8 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadH 15
Structure length118 ft (36 m)
Longest span90 ft (27.4 m)
Deck width22 ft (6.6 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61 (2021)
Projected traffic61 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local Road over Minor Drainage built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1993.

What condition is Local Road over Minor Drainage 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 May 2024.

How much traffic does Local Road over Minor Drainage carry?

About 61 vehicles per day (2021 count).

How long is Local Road over Minor Drainage?

The structure is 118 ft (36 m) long with a longest span of 90 ft (27.4 m) and a deck 22 ft wide.

Who owns Local Road over Minor Drainage?

It is owned by the County Highway Agency.