| Site of Special Scientific Interest | |
| | |
| Location | Avon |
|---|---|
| Grid reference | ST754710 |
| Interest | Biological |
| Area | 30.7 hectare |
| Notification | 1990 |
| Location map | English Nature |
Monkswood Valley (grid reference ST754710 ) is a 30.7-hectare biological Site of Special Scientific Interest (SSSI) near the village of Cold Ashton, South Gloucestershire, notified in 1990. [1]
Monkswood Reservoir, built in 1896 and now owned by Wessex Water, is situated in the valley of the SSSI. [2] [3] The SSSI is woodland and grassland on the sloping land north and south of the reservoir and its tributary. [1]
The woodlands contain Fraxinus excelsior – Acer campestre – Mercurialis perennis (Ash–field Maple–Dog's Mercury) areas, [4] which has limited distribution in Great Britain. [1]
The SSSI has four areas: Monk Woods, Hunterwick Wood & Hartley Wood, Frys Farm and Valley. [5] St. Catherine's Valley SSSI is immediately to the north-east. [6]
The Gloucestershire – Somerset border runs through the reservoir and SSSI. The SSSI is adjacent to the Limestone Link long-distance footpath.
51°26′15″N2°21′19″W / 51.43746°N 2.35530°W