US Bridges

Dysart RD over Trib to Miller Creek

Fair

Black Hawk County, Iowa · 88-12-19-04-10 · Structure no. 000000000075081

Built
1981
44 years old, rebuilt 1996
Condition
Fair
inspected March 2022
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
1,463
2022 count
Owner
County
County Highway Agency

About this bridge

Dysart RD over Trib to Miller Creek is a concrete continuous culvert carrying Dysart RD over Trib to Miller Creek in Black Hawk County, Iowa. It was built in 1981 and reconstructed in 1996, so it is 44 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 1,463 vehicles a day, projected to reach 1,463 by 2043. The structure is 23 ft (7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesDysart RD
CrossesTrib to Miller Creek
Location88-12-19-04-10
RouteCounty Highway 0
CountyBlack Hawk County
StateIowa
Coordinates42.41588, -92.29801
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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.9 US tons
Inventory rating38.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,463 (2022)
Projected traffic1,463 by 2043
Trucks0%
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 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 Dysart RD over Trib to Miller Creek built?

It was built in 1981, making it 44 years old in 2025. It was reconstructed in 1996.

What condition is Dysart RD over Trib to Miller 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 2022.

How much traffic does Dysart RD over Trib to Miller Creek carry?

About 1,463 vehicles per day (2022 count).

How long is Dysart RD over Trib to Miller Creek?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns Dysart RD over Trib to Miller Creek?

It is owned by the County Highway Agency.