US Bridges

Rockdale RD over Over Cc RR & Catfish Ck

Fair

Dubuque County, Iowa · NE of Old Mill RD · Structure no. 000000000004241

Built
1986
39 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
606 ft
7 main spans
Daily traffic
3,302
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Rockdale RD over Over Cc RR & Catfish Ck is a prestressed concrete stringer/multi-beam or girder carrying Rockdale RD over Over Cc RR & Catfish Ck in Dubuque County, Iowa. It was built in 1986, so it is 39 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 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 3,302 vehicles a day, projected to reach 3,302 by 2043. The structure is 606 ft (184.7 m) long and 39 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRockdale RD
CrossesOver Cc RR & Catfish Ck
LocationNE of Old Mill RD
RouteCity Street 0
CountyDubuque County
StateIowa
Coordinates42.46565, -90.67722
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.1 US tons
Inventory rating35.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length606 ft (184.7 m)
Longest span97 ft (29.6 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,302 (2022)
Projected traffic3,302 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad and waterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Rockdale RD over Over Cc RR & Catfish Ck built?

It was built in 1986, making it 39 years old in 2025.

What condition is Rockdale RD over Over Cc RR & Catfish Ck 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 August 2023.

How much traffic does Rockdale RD over Over Cc RR & Catfish Ck carry?

About 3,302 vehicles per day (2022 count).

How long is Rockdale RD over Over Cc RR & Catfish Ck?

The structure is 606 ft (184.7 m) long with a longest span of 97 ft (29.6 m) and a deck 39 ft wide.

Who owns Rockdale RD over Over Cc RR & Catfish Ck?

It is owned by the City or Municipal Highway Agency.