US Bridges

Mlk Jr. Dr. over Small Stream

Good

Black Hawk County, Iowa · City Culvert No. 57C · Structure no. 000000000504500

Built
2000
25 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete Continuous
Length
54 ft
4 main spans
Daily traffic
4,875
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mlk Jr. Dr. over Small Stream is a concrete continuous culvert carrying Mlk Jr. Dr. over Small Stream in Black Hawk County, Iowa. It was built in 2000, so it is 25 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 4,875 vehicles a day, projected to reach 4,875 by 2043. The structure is 54 ft (16.5 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMlk Jr. Dr.
CrossesSmall Stream
LocationCity Culvert No. 57C
RouteCity Street 0
CountyBlack Hawk County
StateIowa
Coordinates42.50792, -92.29134
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating65 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 20 + Mod
Structure length54 ft (16.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,875 (2022)
Projected traffic4,875 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mlk Jr. Dr. over Small Stream built?

It was built in 2000, making it 25 years old in 2025.

What condition is Mlk Jr. Dr. over Small Stream 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 June 2023.

How much traffic does Mlk Jr. Dr. over Small Stream carry?

About 4,875 vehicles per day (2022 count).

How long is Mlk Jr. Dr. over Small Stream?

The structure is 54 ft (16.5 m) long with a longest span of 12 ft (3.7 m).

Who owns Mlk Jr. Dr. over Small Stream?

It is owned by the City or Municipal Highway Agency.