US Bridges

CO P-73 over Des Moines River

PoorPosted for load

Webster County, Iowa · 087281208 · Structure no. 000000000007210

Built
1960
65 years old
Condition
Poor
inspected October 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
417 ft
4 main spans
Daily traffic
1,263
2022 count
Owner
County
County Highway Agency

About this bridge

CO P-73 over Des Moines River is a steel continuous stringer/multi-beam or girder carrying CO P-73 over Des Moines River in Webster County, Iowa. It was built in 1960, so it is 65 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. Its operating status is: posted for load restriction.

It carries about 1,263 vehicles a day, projected to reach 1,263 by 2042. The structure is 417 ft (127.1 m) long and 31 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesCO P-73
CrossesDes Moines River
Location087281208
RouteCity Street 0
StateIowa
Coordinates42.36022, -94.05153
Functional classRural Major Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating30 US tons
Inventory rating18 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length417 ft (127.1 m)
Longest span117 ft (35.7 m)
Deck width31 ft (9.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,263 (2022)
Projected traffic1,263 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CO P-73 over Des Moines River built?

It was built in 1960, making it 65 years old in 2025.

What condition is CO P-73 over Des Moines River 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 October 2022.

How much traffic does CO P-73 over Des Moines River carry?

About 1,263 vehicles per day (2022 count).

How long is CO P-73 over Des Moines River?

The structure is 417 ft (127.1 m) long with a longest span of 117 ft (35.7 m) and a deck 31 ft wide.

Who owns CO P-73 over Des Moines River?

It is owned by the County Highway Agency.