US Bridges

Quartz Ave over Willow Creek

PoorPosted for load

Plymouth County, Iowa · 093441202 · Structure no. 000000000276370

Built
1946
79 years old
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
53 ft
3 main spans
Daily traffic
60
2021 count
Owner
County
County Highway Agency

About this bridge

Quartz Ave over Willow Creek is a wood or timber stringer/multi-beam or girder carrying Quartz Ave over Willow Creek in Plymouth County, Iowa. It was built in 1946, so it is 79 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 60 vehicles a day, projected to reach 60 by 2044. The structure is 53 ft (16.2 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesQuartz Ave
CrossesWillow Creek
Location093441202
RouteCounty Highway 0
CountyPlymouth County
StateIowa
Coordinates42.88546, -95.99675
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.6 US tons
Inventory rating15.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span19 ft (5.8 m)
Deck width23 ft (7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2021)
Projected traffic60 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Quartz Ave over Willow Creek built?

It was built in 1946, making it 79 years old in 2025.

What condition is Quartz Ave over Willow 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 May 2023.

How much traffic does Quartz Ave over Willow Creek carry?

About 60 vehicles per day (2021 count).

How long is Quartz Ave over Willow Creek?

The structure is 53 ft (16.2 m) long with a longest span of 19 ft (5.8 m) and a deck 23 ft wide.

Who owns Quartz Ave over Willow Creek?

It is owned by the County Highway Agency.