US Bridges

HWY 79 over Long Creek

Good

Des Moines County, Iowa · 070043401 · Structure no. 000000000143361

Built
1988
37 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
1,650
2022 count
Owner
County
County Highway Agency

About this bridge

HWY 79 over Long Creek is a concrete continuous culvert carrying HWY 79 over Long Creek in Des Moines County, Iowa. It was built in 1988, so it is 37 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,650 vehicles a day, roughly 13% of them trucks, projected to reach 1,650 by 2043. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 9.9 mi (16 km).

CarriesHWY 79
CrossesLong Creek
Location070043401
RouteCounty Highway 0
StateIowa
Coordinates40.82703, -91.3075
Functional classRural Major 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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 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 traffic1,650 (2022)
Projected traffic1,650 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 79 over Long Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is HWY 79 over Long 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 September 2023.

How much traffic does HWY 79 over Long Creek carry?

About 1,650 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is HWY 79 over Long Creek?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns HWY 79 over Long Creek?

It is owned by the County Highway Agency.