US Bridges

Gilbert ST over Shermans Creek

Poor

Floyd County, Iowa · 095160100 · Structure no. 000000000024960

Built
1914
111 years old
Condition
Poor
inspected December 2024
Type
Arch - Deck
Concrete
Length
40 ft
1 main span
Daily traffic
6,893
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Gilbert ST over Shermans Creek is a concrete arch - deck carrying Gilbert ST over Shermans Creek in Floyd County, Iowa. It was built in 1914, so it is 111 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 6,893 vehicles a day, projected to reach 6,893 by 2044. The structure is 40 ft (12.2 m) long and 49 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesGilbert ST
CrossesShermans Creek
Location095160100
RouteCity Street 0
CountyFloyd County
StateIowa
Coordinates43.06761, -92.68758
Functional classUrban Minor Arterial

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
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating25.7 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width49 ft (14.9 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,893 (2022)
Projected traffic6,893 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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$1.5 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Gilbert ST over Shermans Creek built?

It was built in 1914, making it 111 years old in 2025.

What condition is Gilbert ST over Shermans 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 December 2024.

How much traffic does Gilbert ST over Shermans Creek carry?

About 6,893 vehicles per day (2022 count).

How long is Gilbert ST over Shermans Creek?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 49 ft wide.

Who owns Gilbert ST over Shermans Creek?

It is owned by the City or Municipal Highway Agency.