Ms-1340 Mayflower over Ravine
Lake County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ms-1340 Mayflower over Ravine in Lake County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1970 and reconstructed in 1997, making it 55 years old at the 2025 inventory.
- It carries about 550 vehicles a day (traffic count year 2023).
- Its listed owner is a city or municipal highway agency.
- It is one of 150 of the 250 inventoried bridges in Lake County rated fair (60.0%); 24 (9.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, would be posted or closed except for temporary shoring or other temporary measures (NBI item 41).
- It was rated good in the 2024 inventory and is now fair (superstructure 7 to 6).
- Its most recent inspection on record is dated June 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (42.24973, -87.82284)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 284 ft |
| Location | Mayflower S of Sprng |
| NBI structure number | 049685300000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, would be posted or closed except for temporary shoring or other temporary measures |
| Last inspection (item 90) | June 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 Illinois department of transportation.
Busiest bridges in Lake County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-94 (tri State) over W.f.n. Br. Chi. Riv | 1958 | 82,800 | Fair |
| Interstate 94 SB over E J & E RR | 1958 | 72,350 | Fair |
| Interstate 94 NB over E J & E RR | 1958 | 72,350 | Fair |
| I-94 SB over C M S P & P RR | 1958 | 67,600 | Fair |
| I-94 NB over Cmsp & P RR | 1958 | 67,600 | Fair |
| Tri-state I-294 over Deerfield Rd/rmp F | 2001 | 58,950 | Good |
All bridges nearby: Lake County, IL bridge conditions · every bridge in Lake County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.