US Bridges

N14 Union Ave over Stream

Good

Sac County, Iowa · 089352302 · Structure no. 000000000301381

Built
2022
3 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
35 ft
2 main spans
Daily traffic
330
2022 count
Owner
County
County Highway Agency

About this bridge

N14 Union Ave over Stream is a concrete culvert carrying N14 Union Ave over Stream in Sac County, Iowa. It was built in 2022, so it is 3 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 330 vehicles a day, roughly 28% of them trucks, projected to reach 330 by 2043. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesN14 Union Ave
CrossesStream
Location089352302
RouteCounty Highway 0
CountySac County
StateIowa
Coordinates42.50636, -94.95379
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.
Culvert9 ExcellentNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.2 US tons
Inventory rating36.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length35 ft (10.7 m)
Longest span16 ft (4.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2022)
Projected traffic330 by 2043
Trucks28%
Lanes on structure2
Traffic directionTwo-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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N14 Union Ave over Stream built?

It was built in 2022, making it 3 years old in 2025.

What condition is N14 Union Ave over Stream 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 August 2023.

How much traffic does N14 Union Ave over Stream carry?

About 330 vehicles per day (2022 count), of which roughly 28% are trucks.

How long is N14 Union Ave over Stream?

The structure is 35 ft (10.7 m) long with a longest span of 16 ft (4.9 m).

Who owns N14 Union Ave over Stream?

It is owned by the County Highway Agency.