| Wheal Prosper | |
| Coordinates: | 50.0944°N -5.3657°W |
| Gbgridref: | SW 594 270 |
| Location: | Breage, Cornwall, England |
| Built: | 1860 |
| Designation1: | Scheduled monument |
| Designation1 Offname: | Wheal Prosper pumping engine house 210m south of Eastcliff Farm |
| Designation1 Date: | 18 July 1979 |
| Designation2: | Grade II listed building |
| Designation2 Offname: | Wheal Prosper Engine House |
| Designation2 Date: | 26 August 1987 |
Wheal Prosper was a tin mine in Cornwall, England, a short distance from the hamlet of Rinsey and about 2.5miles west of Porthleven. The ruined engine house remains, overlooking Mount's Bay near Rinsey Head. The site is a Scheduled Monument, and the engine house is a Grade II listed building.
The mine opened circa 1860 to exploit the Porthclew lode; it closed in 1866. It was acquired by the National Trust in 1969 and preserved.[1]
The building housed an engine of cylinder diameter 30 inches, to pump water from the mine. It has three storeys; it is built of killas rubble, with dressed granite quoins, and the chimney has an upper section of brick.
From Robert Hunt's Mineral Statistics of the United Kingdom[2] .
| 1861 | 10.25 | 716.65 | .. | |
| 1862 | .. | 19.30 | Tinstuff, from Midsummer 1859 to Ladyday 1863 inclusive | |
| 1862 | 9.29 | 592.40 | .. | |
| 1862 | 28.47 | 1,778.90 | From Midsummer 1859 to Ladyday 1863 inclusive | |
| 1863 | 4.93 | 326.38 | .. |
| 1862 | 6.00 | 0.50 | 41.70 | |
| 1863 | 4.00 | 0.20 | 13.10 | |
| 1871 | 90.00 | 4.10 | 212.30 | |
| 1872 | 194.00 | 2.80 | 26.40 |