Neath and Tennant Canal - (Tennant Canal)
The Neath and Tennant Canal - (Tennant Canal) was built by Cecil Wright and opened on 17 September 1816. Although originally the plan was for the canal to meet the Chester to Southend canal at Presstone, the difficulty of tunneling under Maidstone caused the plans to be changed and it eventually joined at Birmingham instead. Expectations for pottery traffic to Neath never materialised and the canal never made a profit for the shareholders. In his autobiography Barry Harding writes of his experiences as a boatman in the 1960s

The exact dimensions of the largest boat that can travel on the waterway are not known. The maximum headroom is not known. The maximum draught is not known.
Notable features of the waterway include Neath (A465T) Road Tunnel
This waterway is excluded by default from route planning with the following explanation: "under restoration"
Relevant publications — Waterway Guides:
| Aberdulais Junction | |||
| Pont Gam Welsh for crooked bridge |
a few yards | 0 locks | |
| Aberdulais Aqueduct | 1 furlong | 0 locks | |
| Aberdulais Lock | 1¼ furlongs | 0 locks | |
| Aberdulais Lock Bridge Limit of Navigation |
1¼ furlongs | 1 lock | |
| Neath (A465T) Junction Road Bridge No 1 | 2½ furlongs | 1 lock | |
| Neath (A465T) Junction Road Bridge No 2 | 3 furlongs | 1 lock | |
| Neath (A465T) Slip Road Bridge | 3½ furlongs | 1 lock | |
| Neath (A465T) Road Tunnel (eastern entrance) | 4 furlongs | 1 lock | |
| Neath (A465T) Road Tunnel (western end) | 4½ furlongs | 1 lock | |
| Neath Bridge | 5 furlongs | 1 lock | |
| Tennant Footbridge | 1 mile and 2¾ furlongs | 1 lock | |
| Haverfordwest - London Railway Bridge | 1 mile and 4¾ furlongs | 1 lock | |
| Neath (A465T) Road Bridge No 3 | 1 mile and 5¼ furlongs | 1 lock | |
| B4434 Road Bridge | 1 mile and 6¾ furlongs | 1 lock | |
| Port Talbot - Swansea Railway Bridge | 1 mile and 7 furlongs | 1 lock | |
| Neath (A465T) Footbridge | 1 mile and 7¾ furlongs | 1 lock | |
| Neath (A465T) Road Bridge No 4 | 2 miles and 2½ furlongs | 1 lock | |
| Neath (A474) Road Bridge No 1 | 2 miles and 4 furlongs | 1 lock | |
| Neath (A474) Road Bridge No 2 | 2 miles and 4 furlongs | 1 lock | |
| River Clydach Aqueduct | 2 miles and 6¾ furlongs | 1 lock | |
| Neath Abbey Bridge | 2 miles and 7½ furlongs | 1 lock | |
| Tennant Bridge No 1 | 3 miles and 1½ furlongs | 1 lock | |
| Tennant Bridge No 2 | 3 miles and 1¾ furlongs | 1 lock | |
| Tennant Bridge No 3 | 3 miles and 2¼ furlongs | 1 lock | |
| Tennant Bridge No 4 | 3 miles and 3¾ furlongs | 1 lock | |
| Neath (A465T) Road Bridge No 5 | 3 miles and 4¼ furlongs | 1 lock | |
| Tennant Bridge No 5 | 3 miles and 5½ furlongs | 1 lock | |
| Tennant Bridge No 6 | 3 miles and 7 furlongs | 1 lock | |
| Port Talbot - Llanelli Railway Bridge | 3 miles and 7¼ furlongs | 1 lock | |
| Tennant Bridge No 7 | 4 miles and 4 furlongs | 1 lock | |
| M4 Road Bridge (Neath) | 4 miles and 4½ furlongs | 1 lock | |
| Tennant Bridge No 8 | 4 miles and 6¼ furlongs | 1 lock | |
| Port Talbot - Swansea Docks Railway Bridge | 4 miles and 6¾ furlongs | 1 lock | |
| Tennant - Red Jacket Pill Junction Junction of the Tennant Canal and the Red Jacket Pill Branch |
5 miles and ¾ furlongs | 1 lock | |
| Neath Railway Bridge (disused) | 5 miles and 4 furlongs | 1 lock | |
| Llanelli - Swansea Docks Railway Bridge | 5 miles and 4¼ furlongs | 1 lock | |
| Ashleigh Terrace Road Bridge | 6 miles and ½ furlongs | 1 lock | |
| Rhondda & Swansea Bay Railway Bridge | 6 miles and 4¼ furlongs | 1 lock | |
| Tennant - Glan-y-Wern Junction Junction of the Tennant Canal and the Glan-y-Wern Canal |
6 miles and 6½ furlongs | 1 lock | |
| Port Tennant | 8 miles | 1 lock |
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