US Bridges

SW 9th ST over Cherry RR Mlk Pkwy

Poor

Polk County, Iowa · 078240900 · Structure no. 000000000003961

Built
1967
58 years old, rebuilt 2004
Condition
Poor
inspected July 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
1,334 ft
6 main spans
Daily traffic
14,108
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

SW 9th ST over Cherry RR Mlk Pkwy is a steel continuous girder and floorbeam system carrying SW 9th ST over Cherry RR Mlk Pkwy in Polk County, Iowa. It was built in 1967 and reconstructed in 2004, so it is 58 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 14,108 vehicles a day, projected to reach 14,108 by 2043. The structure is 1,334 ft (406.6 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSW 9th ST
CrossesCherry RR Mlk Pkwy
Location078240900
RouteCity Street 0
StateIowa
Coordinates41.58399, -93.62795
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating59.3 US tons
Inventory rating35.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6 (+10 approach)
Design loadHS 20
Structure length1,334 ft (406.6 m)
Longest span130 ft (39.6 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,108 (2022)
Projected traffic14,108 by 2043
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$22,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was SW 9th ST over Cherry RR Mlk Pkwy built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2004.

What condition is SW 9th ST over Cherry RR Mlk Pkwy 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 July 2023.

How much traffic does SW 9th ST over Cherry RR Mlk Pkwy carry?

About 14,108 vehicles per day (2022 count).

How long is SW 9th ST over Cherry RR Mlk Pkwy?

The structure is 1,334 ft (406.6 m) long with a longest span of 130 ft (39.6 m) and a deck 31 ft wide.

Who owns SW 9th ST over Cherry RR Mlk Pkwy?

It is owned by the City or Municipal Highway Agency.