Mo 21 S over S Prong Lit Black
Ripley County, Missouri · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mo 21 S over S Prong Lit Black in Ripley County, Missouri, 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 2000, making it 25 years old at the 2025 inventory.
- It carries about 1,438 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 40 of the 117 inventoried bridges in Ripley County rated good (34.2%); 7 (6.0%) 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 January 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 → (36.74542, -90.80917)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 224 ft |
| Location | S 11 T 24 N R 2 E |
| NBI structure number | 11952 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | January 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 Missouri department of transportation.
Busiest bridges in Ripley County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 160 E over Dry CR | 1974 | 5,793 | Fair |
| US 160 E over Logan CR | 1974 | 5,793 | Fair |
| US 160 E over Current Rvr | 1989 | 5,374 | Fair |
| US 160 E over Cypress CR | 1974 | 4,809 | Good |
| Mo 21 S over Logan CR | 1922 | 3,058 | Fair |
| Mo 142 E over Spring Bluff CR | 1971 | 3,011 | Good |
All bridges nearby: Ripley County, MO bridge conditions · every bridge in Ripley County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.