US Bridges

SB Ia 27 over Cedar River & RR

Good

Black Hawk County, Iowa · 0.8 Mi. S of Jct. US 218 · Structure no. 000000000601540

Built
1995
30 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
2,862 ft
29 main spans
Daily traffic
8,450
2023 count
Owner
State
State Highway Agency

About this bridge

SB Ia 27 over Cedar River & RR is a prestressed concrete stringer/multi-beam or girder carrying SB Ia 27 over Cedar River & RR in Black Hawk County, Iowa. It was built in 1995, so it is 30 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 8,450 vehicles a day, roughly 6% of them trucks, projected to reach 8,450 by 2043. The structure is 2,862 ft (872.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSB Ia 27
CrossesCedar River & RR
Location0.8 Mi. S of Jct. US 218
RouteState Highway 27
CountyBlack Hawk County
StateIowa
Coordinates42.52875, -92.4292
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans29
Design loadHS 20
Structure length2,862 ft (872.3 m)
Longest span107 ft (32.6 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,450 (2023)
Projected traffic8,450 by 2043
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed1.2 mi (2 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 SB Ia 27 over Cedar River & RR built?

It was built in 1995, making it 30 years old in 2025.

What condition is SB Ia 27 over Cedar River & RR 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 SB Ia 27 over Cedar River & RR carry?

About 8,450 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SB Ia 27 over Cedar River & RR?

The structure is 2,862 ft (872.3 m) long with a longest span of 107 ft (32.6 m) and a deck 43 ft wide.

Who owns SB Ia 27 over Cedar River & RR?

It is owned by the State Highway Agency.