US Bridges

Dysart RD over Miller Creek

Good

Black Hawk County, Iowa · 87-12-18-02-10 · Structure no. 000000000074081

Built
2004
21 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete Continuous
Length
133 ft
3 main spans
Daily traffic
1,660
2022 count
Owner
County
County Highway Agency

About this bridge

Dysart RD over Miller Creek is a concrete continuous slab carrying Dysart RD over Miller Creek in Black Hawk County, Iowa. It was built in 2004, so it is 21 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 1,660 vehicles a day, projected to reach 1,660 by 2043. The structure is 133 ft (40.5 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesDysart RD
CrossesMiller Creek
Location87-12-18-02-10
RouteCounty Highway 0
StateIowa
Coordinates42.35127, -92.2986
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating52.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length133 ft (40.5 m)
Longest span51 ft (15.5 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,660 (2022)
Projected traffic1,660 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 Miller Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is Dysart RD over Miller Creek 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 November 2023.

How much traffic does Dysart RD over Miller Creek carry?

About 1,660 vehicles per day (2022 count).

How long is Dysart RD over Miller Creek?

The structure is 133 ft (40.5 m) long with a longest span of 51 ft (15.5 m) and a deck 43 ft wide.

Who owns Dysart RD over Miller Creek?

It is owned by the County Highway Agency.