Iceberg Rd over Martin CR
Mercer County, Missouri · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Iceberg Rd over Martin CR in Mercer County, Missouri, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 2 (critical condition) on the 0-9 scale.
- It was built in 1920, making it 105 years old at the 2025 inventory.
- It carries about 15 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 23 of the 135 inventoried bridges in Mercer County rated poor (17.0%); 23 (17.0%) are rated poor.
- Its traffic status in the 2025 inventory is closed to all traffic (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated January 2022, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (40.32209, -93.70631)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 9 | 9 | Excellent condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 2 | 2 | Critical condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 29 ft |
| Location | S 22 T 64 N R 25 W |
| NBI structure number | 18864 |
| Condition class | Poor |
| Traffic status (item 41) | Closed to all traffic |
| Last inspection (item 90) | January 2022 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Mercer County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 65 S over Wildcat CR | 2001 | 2,192 | Fair |
| US 136 E over Weldon Fk of Grand | 1971 | 1,917 | Fair |
| US 136 E over Grand Rvr Ovrfl | 1971 | 1,917 | Poor |
| US 136 E over W Muddy CR | 1971 | 1,221 | Fair |
| US 136 E over W Muddy CR | 1971 | 1,221 | Fair |
| US 136 E over Sandy CR | 1985 | 1,084 | Good |
All bridges nearby: Mercer County, MO bridge conditions · every bridge in Mercer County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.