US Bridges

Eastern Ave over Duck Creek

Poor

Scott County, Iowa · 000000000 · Structure no. 000000000003370

Built
1900
125 years old, rebuilt 1973
Condition
Poor
inspected June 2023
Type
Slab
Concrete Continuous
Length
97 ft
3 main spans
Daily traffic
15,300
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Eastern Ave over Duck Creek is a concrete continuous slab carrying Eastern Ave over Duck Creek in Scott County, Iowa. It was built in 1900 and reconstructed in 1973, so it is 125 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 15,300 vehicles a day, projected to reach 15,300 by 2043. The structure is 97 ft (29.6 m) long and 63 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesEastern Ave
CrossesDuck Creek
Location000000000
RouteCity Street 0
CountyScott County
StateIowa
Coordinates41.54986, -90.55144
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.6 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length97 ft (29.6 m)
Longest span32 ft (9.8 m)
Deck width63 ft (19.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,300 (2022)
Projected traffic15,300 by 2043
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost$120,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Eastern Ave over Duck Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1973.

What condition is Eastern Ave over Duck Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does Eastern Ave over Duck Creek carry?

About 15,300 vehicles per day (2022 count).

How long is Eastern Ave over Duck Creek?

The structure is 97 ft (29.6 m) long with a longest span of 32 ft (9.8 m) and a deck 63 ft wide.

Who owns Eastern Ave over Duck Creek?

It is owned by the City or Municipal Highway Agency.