US Bridges

Summit ST over US 61

Fair

Jackson County, Iowa · 0.5 Mi. S of Ia #64 · Structure no. 000000000606750

Built
1997
28 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
232 ft
3 main spans
Daily traffic
3,277
2022 count
Owner
State
State Highway Agency

About this bridge

Summit ST over US 61 is a steel continuous stringer/multi-beam or girder carrying Summit ST over US 61 in Jackson County, Iowa. It was built in 1997, so it is 28 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,277 vehicles a day, projected to reach 3,277 by 2043. The structure is 232 ft (70.7 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSummit ST
CrossesUS 61
Location0.5 Mi. S of Ia #64
RouteCity Street 0
CountyJackson County
StateIowa
Coordinates42.06135, -90.68321
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length232 ft (70.7 m)
Longest span132 ft (40.2 m)
Deck width44 ft (13.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,277 (2022)
Projected traffic3,277 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Summit ST over US 61 built?

It was built in 1997, making it 28 years old in 2025.

What condition is Summit ST over US 61 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2023.

How much traffic does Summit ST over US 61 carry?

About 3,277 vehicles per day (2022 count).

How long is Summit ST over US 61?

The structure is 232 ft (70.7 m) long with a longest span of 132 ft (40.2 m) and a deck 44 ft wide.

Who owns Summit ST over US 61?

It is owned by the State Highway Agency.