US Bridges

H18 140th ST over Lynn Creek

Good

Henry County, Iowa · 073063001 · Structure no. 000000000181461

Built
2016
9 years old
Condition
Good
inspected March 2021
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
80
2022 count
Owner
County
County Highway Agency

About this bridge

H18 140th ST over Lynn Creek is a concrete continuous culvert carrying H18 140th ST over Lynn Creek in Henry County, Iowa. It was built in 2016, so it is 9 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 80 vehicles a day, projected to reach 80 by 2043. The structure is 23 ft (7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesH18 140th ST
CrossesLynn Creek
Location073063001
RouteCounty Highway 0
StateIowa
Coordinates41.10545, -91.59518
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50.4 US tons
Inventory rating38.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2022)
Projected traffic80 by 2043
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was H18 140th ST over Lynn Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is H18 140th ST over Lynn Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2021.

How much traffic does H18 140th ST over Lynn Creek carry?

About 80 vehicles per day (2022 count).

How long is H18 140th ST over Lynn Creek?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns H18 140th ST over Lynn Creek?

It is owned by the County Highway Agency.