US Bridges

Parker Ave over South Timber Creek

PoorPosted for load

Marshall County, Iowa · 082181004 · Structure no. 000000000241840

Built
1950
75 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
2 main spans
Daily traffic
21
2022 count
Owner
County
County Highway Agency

About this bridge

Parker Ave over South Timber Creek is a steel stringer/multi-beam or girder carrying Parker Ave over South Timber Creek in Marshall County, Iowa. It was built in 1950, so it is 75 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 21 vehicles a day, projected to reach 21 by 2044. The structure is 76 ft (23.2 m) long and 21 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesParker Ave
CrossesSouth Timber Creek
Location082181004
RouteCounty Highway 0
StateIowa
Coordinates41.93041, -92.94192
Functional classRural 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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating33.7 US tons
Inventory rating19.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length76 ft (23.2 m)
Longest span38 ft (11.6 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2022)
Projected traffic21 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Parker Ave over South Timber Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Parker Ave over South Timber 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 November 2024.

How much traffic does Parker Ave over South Timber Creek carry?

About 21 vehicles per day (2022 count).

How long is Parker Ave over South Timber Creek?

The structure is 76 ft (23.2 m) long with a longest span of 38 ft (11.6 m) and a deck 21 ft wide.

Who owns Parker Ave over South Timber Creek?

It is owned by the County Highway Agency.