US Bridges

Greenhill RD over Stream

Good

Black Hawk County, Iowa · 000000000 · Structure no. 000000000504230

Built
1990
35 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
10,300
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Greenhill RD over Stream is a concrete continuous culvert carrying Greenhill RD over Stream in Black Hawk County, Iowa. It was built in 1990, so it is 35 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 10,300 vehicles a day, projected to reach 10,300 by 2044. The structure is 25 ft (7.6 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesGreenhill RD
CrossesStream
Location000000000
RouteCity Street 0
StateIowa
Coordinates42.49808, -92.4135
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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width36 ft (11.1 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,300 (2022)
Projected traffic10,300 by 2044
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 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 Greenhill RD over Stream built?

It was built in 1990, making it 35 years old in 2025.

What condition is Greenhill RD over 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 March 2024.

How much traffic does Greenhill RD over Stream carry?

About 10,300 vehicles per day (2022 count).

How long is Greenhill RD over Stream?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 36 ft wide.

Who owns Greenhill RD over Stream?

It is owned by the City or Municipal Highway Agency.