| Upper Canal System | |
|---|---|
_-_Upper_Canal_at_Bringelly_Road_(5051481b2).jpg) Upper Canal at Bringelly Road | |
 Map of Upper Canal System | |
| Location | |
| Country | Australia |
| State | New South Wales |
| Coordinates | 33°54′56″S 150°49′43″E / 33.9155°S 150.82863°E |
| General direction | South-west – North-east |
| From | Pheasants Nest |
| Passes through | Wollondilly, Camden, Campbelltown, Liverpool, Fairfield, and Cumberland |
| To | Prospect Reservoir |
| General information | |
| Type | Water |
| Status | Operational |
| Owner | WaterNSW |
| Operator | Sydney Catchment Authority |
| Construction started | c. 1880 |
| Commissioned | 1888 |
| Technical information | |
| Length | 54 km (34 mi) |
| No. of compressor stations | Nil |
| No. of pumping stations | Nil |
| Designations | |
|---|---|
| Official name | Upper Canal System (Pheasants Nest Weir to Prospect Reservoir) |
| Type | Built |
| Criteria | a., b., e., f. |
| Designated | 18 November 1999 |
| Part of | Utilities - Water group |
| Reference no. | 01373 |
The Upper Canal System, also called the Southern Railway Aqueduct and the Cataract Tunnel, is a heritage-listed operational gravity-fed aqueduct that supplies some of the potable water for Sydney, in New South Wales, Australia. The aqueduct comprises 54 kilometres (34 mi) of open canals, tunnels, and closed pipelines that connect the Upper Nepean Scheme with the Prospect Reservoir. The aqueduct is managed by the Sydney Catchment Authority on behalf of WaterNSW, an agency of the Government of New South Wales. It was listed on the New South Wales State Heritage Register on 18 November 1999.[1]