US Bridges

LCL-400th ST over Hunters Branch

PoorPosted for load

Mills County, Iowa · 071402602 · Structure no. 000000000244810

Built
1965
60 years old
Condition
Poor
inspected April 2023
Type
Truss - Thru
Steel
Length
81 ft
2 main spans
Daily traffic
26
2021 count
Owner
County
County Highway Agency

About this bridge

LCL-400th ST over Hunters Branch is a steel truss - thru carrying LCL-400th ST over Hunters Branch in Mills County, Iowa. It was built in 1965, so it is 60 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 26 vehicles a day, projected to reach 26 by 2043. The structure is 81 ft (24.7 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLCL-400th ST
CrossesHunters Branch
Location071402602
RouteCounty Highway 0
CountyMills County
StateIowa
Coordinates40.92693, -95.42254
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating15.4 US tons
Inventory rating9.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans2
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span43 ft (13.1 m)
Deck width20 ft (6.1 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2021)
Projected traffic26 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 LCL-400th ST over Hunters Branch built?

It was built in 1965, making it 60 years old in 2025.

What condition is LCL-400th ST over Hunters Branch 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 April 2023.

How much traffic does LCL-400th ST over Hunters Branch carry?

About 26 vehicles per day (2021 count).

How long is LCL-400th ST over Hunters Branch?

The structure is 81 ft (24.7 m) long with a longest span of 43 ft (13.1 m) and a deck 20 ft wide.

Who owns LCL-400th ST over Hunters Branch?

It is owned by the County Highway Agency.