US Bridges

West ST over Drainage

Poor

Woodbury County, Iowa · M70602000 · Structure no. 000000000010730

Built
1930
95 years old
Condition
Poor
inspected April 2024
Type
Girder and Floorbeam System
Steel
Length
120 ft
3 main spans
Daily traffic
48
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

West ST over Drainage is a steel girder and floorbeam system carrying West ST over Drainage in Woodbury County, Iowa. It was built in 1930, so it is 95 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 48 vehicles a day, projected to reach 48 by 2044. The structure is 120 ft (36.6 m) long and 16 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesWest ST
CrossesDrainage
LocationM70602000
RouteCity Street 0
CountyWoodbury County
StateIowa
Coordinates42.55633, -96.43201
Functional classUrban Local

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
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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 12 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating22 US tons
Inventory rating18.4 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckWood or timber
Main spans3
Design loadUnknown
Structure length120 ft (36.6 m)
Longest span40 ft (12.2 m)
Deck width16 ft (5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48 (2021)
Projected traffic48 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was West ST over Drainage built?

It was built in 1930, making it 95 years old in 2025.

What condition is West ST over Drainage 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 April 2024.

How much traffic does West ST over Drainage carry?

About 48 vehicles per day (2021 count).

How long is West ST over Drainage?

The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 16 ft wide.

Who owns West ST over Drainage?

It is owned by the City or Municipal Highway Agency.