US Bridges

Grant ST South over Mud Creek

PoorPosted for load

Polk County, Iowa · 079220602 · Structure no. 000000000504705

Built
1927
98 years old
Condition
Poor
inspected May 2024
Type
Slab
Concrete
Length
22 ft
1 main span
Daily traffic
2,902
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Grant ST South over Mud Creek is a concrete slab carrying Grant ST South over Mud Creek in Polk County, Iowa. It was built in 1927, so it is 98 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 3 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 2,902 vehicles a day, projected to reach 2,902 by 2044. The structure is 22 ft (6.7 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesGrant ST South
CrossesMud Creek
Location079220602
RouteCity Street 0
StateIowa
Coordinates41.67897, -93.46457
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating27.8 US tons
Inventory rating16.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 m)
Deck width26 ft (7.9 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,902 (2021)
Projected traffic2,902 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal 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 Grant ST South over Mud Creek built?

It was built in 1927, making it 98 years old in 2025.

What condition is Grant ST South over Mud 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 2024.

How much traffic does Grant ST South over Mud Creek carry?

About 2,902 vehicles per day (2021 count).

How long is Grant ST South over Mud Creek?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 26 ft wide.

Who owns Grant ST South over Mud Creek?

It is owned by the City or Municipal Highway Agency and maintained by the County Highway Agency.