| Shields Branch | |
|---|---|
 | |
| Native name | Rivière Saint-Roch (French) |
| Physical characteristics | |
| Source | |
| • location | Mountain stream in Sainte-Perpétue, Chaudière-Appalaches, Quebec, MRC L'Islet Regional County Municipality, Chaudière-Appalaches, Quebec, in Canada |
| • coordinates | 47°06′58″N 69°49′37″W / 47.11611°N 69.82694°W |
| • elevation | 444 metres (1,457 ft) |
| Mouth | |
• location | Big Black River (Saint John River), Township T15 R15 WELS, Maine, United States |
• coordinates | 46°55′26″N 69°37′48″W / 46.92389°N 69.63000°W |
• elevation | 263 metres (863 ft) |
| Length | 44.0 kilometres (27.3 mi) |
| Basin features | |
| Tributaries | |
| • right | Frontier brook |
The Shields Branch (French: Rivière Saint-Roch in Quebec) is a tributary of the Big Black River, flowing in:
- Quebec (Canada): in the administrative region of Chaudière-Appalaches, in L'Islet Regional County Municipality, in the municipalities of Sainte-Perpétue, Chaudière-Appalaches, Quebec, Saint-Omer, Quebec and Saint-Pamphile, Quebec;
- Maine (United States): in the Aroostook County, Township T15 R15 Wels.
Its course is situated between the Rochu River (or “Little Saint Rock River”) (West side) and the Gagnon River (West side). This river flows in forested area in a valley encircled by Notre Dame Mountains.
From its source (47°06′58″N 69°49′37″W / 47.116°N 69.827°W), in L'Islet Regional County Municipality, the river runs south and southeast across the Canada–United States border in Maine Township 15, Range 15, WELS, to the Big Black River in T 14, R 15.