US Bridges

Middle RD over Duck Creek

FairPosted for load

Scott County, Iowa · Bettendorf Ia · Structure no. 000000000000660

Built
1961
64 years old, rebuilt 1975
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
128 ft
3 main spans
Daily traffic
19,700
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Middle RD over Duck Creek is a concrete continuous slab carrying Middle RD over Duck Creek in Scott County, Iowa. It was built in 1961 and reconstructed in 1975, so it is 64 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. Its operating status is: posted for load restriction.

It carries about 19,700 vehicles a day, projected to reach 19,700 by 2043. The structure is 128 ft (39 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMiddle RD
CrossesDuck Creek
LocationBettendorf Ia
RouteCity Street 0
CountyScott County
StateIowa
Coordinates41.54329, -90.51136
Functional classUrban Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.2 US tons
Inventory rating21.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length128 ft (39 m)
Longest span49 ft (14.9 m)
Deck width68 ft (20.7 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,700 (2022)
Projected traffic19,700 by 2043
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Middle RD over Duck Creek built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1975.

What condition is Middle RD over Duck 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 July 2023.

How much traffic does Middle RD over Duck Creek carry?

About 19,700 vehicles per day (2022 count).

How long is Middle RD over Duck Creek?

The structure is 128 ft (39 m) long with a longest span of 49 ft (14.9 m) and a deck 68 ft wide.

Who owns Middle RD over Duck Creek?

It is owned by the City or Municipal Highway Agency.