| Navy | The Royal Canadian Navy |
| Type | Frigate |
| Class | River |
| Pennant | K 459 |
| Built by | Morton Engineering and Dry Dock Co. (Quebec City, Quebec, Canada) |
| Ordered | |
| Laid down | 7 Jul 1943 |
| Launched | 30 Oct 1943 |
| Commissioned | 24 May 1944 |
| End service | 18 Nov 1945 |
| Loss position | |
| History | Decommissioned 18 November 1945.
Commanding Officers: Lt.Cdr. Thomas Gilmour, RCNR |
Commands listed for HMCS Thetford Mines (K 459)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | John Alfred Robert Allen, RCNVR | 4 May 1944 | 21 Jul 1945 |
| 2 | Thomas Gilmour, RCNR | 21 Jul 1945 | 18 Nov 1945 |
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Noteable events involving Thetford Mines include:
7 Mar 1945
The German submarine U-1302 was sunk in St George´s Channel, in position 52º19'N, 05º23'W, by depth charges / hedgehog from the Canadian frigates HMCS La Hulloise (Lt.Cdr. J. Brock, RCNVR), HMCS Strathadam (A/Lt.Cdr. H.L. Quinn, DSC, RCNVR) and HMCS Thedford Mines (Lt. J.A.R. Allan, DSC, RCNVR). (see map)
23 Mar 1945
HMCS Thedford Mines (Lt. J.A.R. Allan, DSC, RCNVR) picks up 33 survivors from the German submarine U-1003, but two of them died aboard and were buried at sea.