US Bridges

N 2nd Ave over Small Stream

PoorClosed to traffic

Lyon County, Iowa · 100453304 · Structure no. 000000000502520

Built
1900
125 years old
Condition
Poor
inspected August 2024
Type
Culvert
Concrete
Length
60 ft
6 main spans
Daily traffic
346
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

N 2nd Ave over Small Stream is a concrete culvert carrying N 2nd Ave over Small Stream in Lyon County, Iowa. It was built in 1900, so it is 125 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: closed to all traffic.

It carries about 346 vehicles a day, projected to reach 346 by 2044. The structure is 60 ft (18.3 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN 2nd Ave
CrossesSmall Stream
Location100453304
RouteCity Street 0
CountyLyon County
StateIowa
Coordinates43.4331, -96.16627
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourFoundations stable; scour above top of footing
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span9 ft (2.7 m)
Deck width22 ft (6.8 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic346 (2022)
Projected traffic346 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was N 2nd Ave over Small Stream built?

It was built in 1900, making it 125 years old in 2025.

What condition is N 2nd Ave over Small Stream 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 August 2024.

How much traffic does N 2nd Ave over Small Stream carry?

About 346 vehicles per day (2022 count).

How long is N 2nd Ave over Small Stream?

The structure is 60 ft (18.3 m) long with a longest span of 9 ft (2.7 m) and a deck 22 ft wide.

Who owns N 2nd Ave over Small Stream?

It is owned by the City or Municipal Highway Agency.