US Bridges

US 71 over Cedar Creek

Good

Sac County, Iowa · 0.1 Mi. S of Co. Rd. D36 · Structure no. 000000000046751

Built
2015
10 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
267 ft
3 main spans
Daily traffic
1,720
2022 count
Owner
State
State Highway Agency

About this bridge

US 71 over Cedar Creek is a prestressed concrete stringer/multi-beam or girder carrying US 71 over Cedar Creek in Sac County, Iowa. It was built in 2015, so it is 10 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 1,720 vehicles a day, roughly 28% of them trucks, projected to reach 1,720 by 2043. The structure is 267 ft (81.4 m) long and 63 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesUS 71
CrossesCedar Creek
Location0.1 Mi. S of Co. Rd. D36
RouteU.S. Route 71
StateIowa
Coordinates42.41904, -94.95481
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length267 ft (81.4 m)
Longest span137 ft (41.8 m)
Deck width63 ft (19.3 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,720 (2022)
Projected traffic1,720 by 2043
Trucks28%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 71 over Cedar Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is US 71 over Cedar 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 December 2023.

How much traffic does US 71 over Cedar Creek carry?

About 1,720 vehicles per day (2022 count), of which roughly 28% are trucks.

How long is US 71 over Cedar Creek?

The structure is 267 ft (81.4 m) long with a longest span of 137 ft (41.8 m) and a deck 63 ft wide.

Who owns US 71 over Cedar Creek?

It is owned by the State Highway Agency.