Hogsmill River
The Hogsmill River in Surrey and Greater London, England is a small chalk stream tributary of the River Thames. It rises in Ewell and flows into the Thames at Kingston upon Thames on the lowest non-tidal reach, that above Teddington Lock.
| Hogsmill | |
|---|---|
The Hogsmill at Kingston as it flows into the Thames | |
Location of the mouth in Greater London | |
| Location | |
| Country | England |
| Counties | Surrey, Greater London |
| Districts / Boroughs | Epsom and Ewell, Royal Borough of Kingston upon Thames |
| Towns | Ewell, Old Malden, Berrylands, Kingston upon Thames |
| Physical characteristics | |
| Source | Bourne Hall Park |
| • location | Ewell, Surrey |
| • coordinates | 51°21′01″N 0°15′03″W |
| Mouth | River Thames |
• location | Kingston upon Thames |
• coordinates | 51°24′33″N 0°18′30″W |
| Length | 9.9 km (6.2 mi) |
| Basin size | 73 km2 (28 sq mi) |
| Discharge | |
| • location | Kingston upon Thames |
| • average | 0.98 m3/s (35 cu ft/s) |
| • minimum | 0.33 m3/s (12 cu ft/s)9 September 1976 |
| • maximum | 26.3 m3/s (930 cu ft/s)6 August 1981 |
| Discharge | |
| • location | Ewell |
| • average | 0.04 m3/s (1.4 cu ft/s) |
| Basin features | |
| Progression | Hogsmill, Thames, North Sea |
| Tributaries | |
| • left | Horton Stream, Bonesgate Stream, Green Lanes Stream, Tolworth Brook |
| • right | Ewell Court Stream |
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The river is 10 km (6 mi) long and has a catchment area of about 73 km2 (28 sq mi). Nearby land was formerly flood-meadows; following improvements it is now mostly sports grounds, a sewage treatment works and green space, save for Kingston and Epsom town centres. It is a habitat of many animals, fish and insects.
The 12th-century Clattern Bridge, one of the oldest road bridges in England, crosses the river in the southwest of Kingston town centre. The Coronation Stone, now sited close to the river in Kingston, is believed to have been used for the coronation of Saxon kings in the 10th century. It was used as a horse mounting block until 1850 when it was mounted on a plinth in the town centre.
The river has five tributaries: Green Lanes Stream, Ewell Court Stream, Horton Stream, Bonesgate Stream and Tolworth Brook.