18TH St at Desiard over Drainage Canal
Ouachita Parish, Louisiana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 18TH St at Desiard over Drainage Canal in Ouachita Parish, Louisiana, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1996, making it 29 years old at the 2025 inventory.
- It carries about 100,000 vehicles a day (traffic count year 1979).
- Its listed owner is a city or municipal highway agency.
- It is one of 78 of the 331 inventoried bridges in Ouachita Parish rated good (23.6%); 42 (12.7%) are rated poor.
- 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 → (32.51103, -92.10282)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 20 ft |
| Location | 0.7 MI NW of I-20 |
| NBI structure number | 053732307920621 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.
Busiest bridges in Ouachita Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I0020 over Black Bayou | 1965 | 84,225 | Fair |
| I0020 over City St/icg Rr/ouachita | 1965 | 84,225 | Fair |
| I0020 over Youngs Bayou | 1965 | 84,225 | Fair |
| I0020 over US 165 | 1965 | 84,225 | Fair |
| I0020 over E Youngs Bayou | 1965 | 84,225 | Fair |
| I0020 over Drain | 1968 | 84,225 | Fair |
All bridges nearby: Ouachita Parish, LA bridge conditions · every bridge in Ouachita Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.