US Bridges

W 49th ST over Silver Creek

Fair

Scott County, Iowa · 000000000 · Structure no. 000000000003095

Built
1971
54 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
3,680
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

W 49th ST over Silver Creek is a prestressed concrete stringer/multi-beam or girder carrying W 49th ST over Silver Creek in Scott County, Iowa. It was built in 1971, so it is 54 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 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 3,680 vehicles a day, projected to reach 3,680 by 2043. The structure is 75 ft (22.9 m) long and 51 ft wide.

Location

Open in Google Maps
CarriesW 49th ST
CrossesSilver Creek
Location000000000
RouteCity Street 0
CountyScott County
StateIowa
Coordinates41.57008, -90.62177
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
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 evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span71 ft (21.6 m)
Deck width51 ft (15.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,680 (2022)
Projected traffic3,680 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
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$60,000
NavigationNo navigation control on waterway

Frequently asked questions

When was W 49th ST over Silver Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is W 49th ST over Silver 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 June 2023.

How much traffic does W 49th ST over Silver Creek carry?

About 3,680 vehicles per day (2022 count).

How long is W 49th ST over Silver Creek?

The structure is 75 ft (22.9 m) long with a longest span of 71 ft (21.6 m) and a deck 51 ft wide.

Who owns W 49th ST over Silver Creek?

It is owned by the City or Municipal Highway Agency.