US Bridges

SB Ia 27 over Seerley Blvd

Good

Black Hawk County, Iowa · 0.2 MI N of University Av · Structure no. 000000000601475

Built
1994
31 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
150 ft
3 main spans
Daily traffic
6,900
2022 count
Owner
State
State Highway Agency

About this bridge

SB Ia 27 over Seerley Blvd is a prestressed concrete stringer/multi-beam or girder carrying SB Ia 27 over Seerley Blvd in Black Hawk County, Iowa. It was built in 1994, so it is 31 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 6,900 vehicles a day, roughly 8% of them trucks, projected to reach 6,900 by 2043. The structure is 150 ft (45.7 m) long and 79 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSB Ia 27
CrossesSeerley Blvd
Location0.2 MI N of University Av
RouteState Highway 27
CountyBlack Hawk County
StateIowa
Coordinates42.51603, -92.44296
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating31.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span61 ft (18.6 m)
Deck width79 ft (24.2 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,900 (2022)
Projected traffic6,900 by 2043
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SB Ia 27 over Seerley Blvd built?

It was built in 1994, making it 31 years old in 2025.

What condition is SB Ia 27 over Seerley Blvd 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 March 2023.

How much traffic does SB Ia 27 over Seerley Blvd carry?

About 6,900 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is SB Ia 27 over Seerley Blvd?

The structure is 150 ft (45.7 m) long with a longest span of 61 ft (18.6 m) and a deck 79 ft wide.

Who owns SB Ia 27 over Seerley Blvd?

It is owned by the State Highway Agency.