US Bridges

Lrd Olson RD over Black Earth Creek

Poor

Dane County, Wisconsin · 0.1M E JCT Cth Kp · Structure no. B13034000000000

Built
1978
47 years old
Condition
Poor
inspected September 2024
Type
Slab
Concrete Continuous
Length
60 ft
2 main spans
Daily traffic
176
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Lrd Olson RD over Black Earth Creek is a concrete continuous slab carrying Lrd Olson RD over Black Earth Creek in Dane County, Wisconsin. It was built in 1978, so it is 47 years old, older than the Wisconsin average of 40.3 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 176 vehicles a day, projected to reach 193 by 2043. The structure is 60 ft (18.3 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLrd Olson RD
CrossesBlack Earth Creek
Location0.1M E JCT Cth Kp
RouteCity Street 0
CountyDane County
StateWisconsin
Coordinates43.15611, -89.7765
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
Deck4 PoorAdvanced section loss, deterioration, 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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 12 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.7 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length60 ft (18.3 m)
Longest span29 ft (8.9 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic176 (2022)
Projected traffic193 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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$263,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lrd Olson RD over Black Earth Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Lrd Olson RD over Black Earth 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 September 2024.

How much traffic does Lrd Olson RD over Black Earth Creek carry?

About 176 vehicles per day (2022 count).

How long is Lrd Olson RD over Black Earth Creek?

The structure is 60 ft (18.3 m) long with a longest span of 29 ft (8.9 m) and a deck 32 ft wide.

Who owns Lrd Olson RD over Black Earth Creek?

It is owned by the Town or Township Highway Agency.