US Bridges

Mlk Jr DR over Lane ST

Fair

Black Hawk County, Iowa · City Bridge No. 52 · Structure no. 000000000504305

Built
1996
29 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
131 ft
3 main spans
Daily traffic
6,494
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mlk Jr DR over Lane ST is a prestressed concrete stringer/multi-beam or girder carrying Mlk Jr DR over Lane ST in Black Hawk County, Iowa. It was built in 1996, so it is 29 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 5 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 6,494 vehicles a day, projected to reach 6,494 by 2043. The structure is 131 ft (39.9 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMlk Jr DR
CrossesLane ST
LocationCity Bridge No. 52
RouteCity Street 0
CountyBlack Hawk County
StateIowa
Coordinates42.50069, -92.32545
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating23 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length131 ft (39.9 m)
Longest span61 ft (18.6 m)
Deck width59 ft (18 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,494 (2022)
Projected traffic6,494 by 2043
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Mlk Jr DR over Lane ST built?

It was built in 1996, making it 29 years old in 2025.

What condition is Mlk Jr DR over Lane ST 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 June 2023.

How much traffic does Mlk Jr DR over Lane ST carry?

About 6,494 vehicles per day (2022 count).

How long is Mlk Jr DR over Lane ST?

The structure is 131 ft (39.9 m) long with a longest span of 61 ft (18.6 m) and a deck 59 ft wide.

Who owns Mlk Jr DR over Lane ST?

It is owned by the City or Municipal Highway Agency.