Lrd Shamrock Lane over Butler Ditch
Waukesha County, Wisconsin · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Lrd Shamrock Lane over Butler Ditch in Waukesha County, Wisconsin, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1988, making it 37 years old at the 2025 inventory.
- It carries about 562 vehicles a day (traffic count year 2022).
- Its listed owner is a city or municipal highway agency.
- It is one of 176 of the 370 inventoried bridges in Waukesha County rated good (47.6%); 20 (5.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (43.09519, -88.10264)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | – | 7 | Good condition |
| Superstructure | – | 7 | Good condition |
| Substructure | – | 7 | Good condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 43 ft |
| Location | 0.7M N Jct Sth 190 |
| NBI structure number | P67078500000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Waukesha County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 94 over Poplar Creek | 1961 | 133,000 | Fair |
| Ih 94 over Br Poplar Creek | 1961 | 133,000 | Fair |
| Ih 94 over Pewaukee River | 1957 | 112,000 | Fair |
| Ih 41/USH 45 over Nor-x-way Channel | 2018 | 86,800 | Good |
| Ih 94 WB over Lrd Maple Ave | 1962 | 75,000 | Good |
| Ih 94 WB over Sth 83 | 1962 | 75,000 | Fair |
All bridges nearby: Waukesha County, WI bridge conditions · every bridge in Waukesha County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.