Boyce Tower Rd over Conway Bayou
Ascension Parish, Louisiana · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Boyce Tower Rd over Conway Bayou in Ascension Parish, Louisiana, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1965 and reconstructed in 2012, making it 60 years old at the 2025 inventory.
- It carries about 5 vehicles a day (traffic count year 2019).
- It is one of 26 of the 216 inventoried bridges in Ascension Parish rated poor (12.0%); 26 (12.0%) 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 2024, on a 12-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 → (30.14875, -90.80789)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 3 | 3 | Serious condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 89 ft |
| Location | 0.8 M W of US 61 |
| NBI structure number | 610300000610342 |
| Condition class | Poor |
| Traffic status (item 41) | Closed to all traffic |
| Last inspection (item 90) | January 2024 |
| Inspection interval (item 91) | 12 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 Louisiana department of transportation.
Busiest bridges in Ascension Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I0010 over Drain | 1975 | 60,802 | Fair |
| I0010 over La 73 | 1975 | 60,802 | Fair |
| I0010 over Drain | 1975 | 60,802 | Good |
| I0010 over Drain | 1975 | 60,802 | Good |
| I0010 over LA429/Cornerview Rd | 1975 | 60,802 | Fair |
| I0010 over Drain | 1975 | 60,802 | Good |
All bridges nearby: Ascension Parish, LA bridge conditions · every bridge in Ascension Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.