US Bridges

Dubuque RD over Poyner Creek

Fair

Black Hawk County, Iowa · 88-12-02-03-10 · Structure no. 000000000014660

Built
1955
70 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
58 ft
3 main spans
Daily traffic
1,532
2022 count
Owner
County
County Highway Agency

About this bridge

Dubuque RD over Poyner Creek is a concrete continuous culvert carrying Dubuque RD over Poyner Creek in Black Hawk County, Iowa. It was built in 1955, so it is 70 years old, older 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 1,532 vehicles a day, roughly 10% of them trucks, projected to reach 1,532 by 2044. The structure is 58 ft (17.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesDubuque RD
CrossesPoyner Creek
Location88-12-02-03-10
RouteCounty Highway 0
CountyBlack Hawk County
StateIowa
Coordinates42.46879, -92.20609
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 20
Structure length58 ft (17.6 m)
Longest span18 ft (5.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,532 (2022)
Projected traffic1,532 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Dubuque RD over Poyner Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Dubuque RD over Poyner Creek 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 March 2024.

How much traffic does Dubuque RD over Poyner Creek carry?

About 1,532 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Dubuque RD over Poyner Creek?

The structure is 58 ft (17.6 m) long with a longest span of 18 ft (5.5 m).

Who owns Dubuque RD over Poyner Creek?

It is owned by the County Highway Agency.