US Bridges

Lrd Palmer DR over Spring Brook

Fair

Rock County, Wisconsin · 0.1M N JCT Sth 11 · Structure no. P53073600000000

Built
1935
90 years old
Condition
Fair
inspected August 2024
Type
Arch - Deck
Steel
Length
103 ft
4 main spans
Daily traffic
2,500
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lrd Palmer DR over Spring Brook is a steel arch - deck carrying Lrd Palmer DR over Spring Brook in Rock County, Wisconsin. It was built in 1935, so it is 90 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,500 vehicles a day, projected to reach 3,000 by 2043. The structure is 103 ft (31.5 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLrd Palmer DR
CrossesSpring Brook
Location0.1M N JCT Sth 11
RouteCity Street 0
CountyRock County
StateWisconsin
Coordinates42.67639, -88.99083
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating26.8 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckCorrugated steel
Main spans4
Design loadH 15
Structure length103 ft (31.5 m)
Longest span15 ft (4.6 m)
Deck width47 ft (14.2 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2022)
Projected traffic3,000 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lrd Palmer DR over Spring Brook built?

It was built in 1935, making it 90 years old in 2025.

What condition is Lrd Palmer DR over Spring Brook in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does Lrd Palmer DR over Spring Brook carry?

About 2,500 vehicles per day (2022 count).

How long is Lrd Palmer DR over Spring Brook?

The structure is 103 ft (31.5 m) long with a longest span of 15 ft (4.6 m) and a deck 47 ft wide.

Who owns Lrd Palmer DR over Spring Brook?

It is owned by the City or Municipal Highway Agency.