SH 142 Ml over Rio San Antonio
Conejos County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SH 142 Ml over Rio San Antonio in Conejos County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1940, making it 85 years old at the 2025 inventory.
- It carries about 530 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 32 of the 63 inventoried bridges in Conejos County rated fair (50.8%); 8 (12.7%) 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 February 2025, 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 → (37.17533, -105.87487)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 116 ft |
| Location | 3.5 Miles East of Manassa |
| NBI structure number | P-13-D |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 2025 |
| 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 Colorado department of transportation.
Busiest bridges in Conejos County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 285 Ml over Alamosa Creek | 1959 | 5,200 | Fair |
| US 285 Ml over La Jara Creek | 1959 | 5,200 | Good |
| US 285 Ml over Conejos Riv.overflow | 1929 | 3,200 | Poor |
| US 285 Ml over Conejos River | 1929 | 3,200 | Fair |
| SH 15 Ml over La Jara Creek | 1938 | 1,300 | Fair |
| US 285 Ml over Rio San Antonio | 1938 | 1,200 | Fair |
All bridges nearby: Conejos County, CO bridge conditions · every bridge in Conejos County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.