Spill evidence · Friends of the Dart

Stonepark Crescent, Ashburton

Combined sewer overflow · SBB01186 · feeds BUCKFASTLEIGH STW

No rain data

The discharge

Spill day: Sunday, 20 December 2020
Started: 20 Dec 2020, 00:05
Ended: 20 Dec 2020, 00:54
Duration: 48 minutes 40 seconds
Receiving water: Ashburn
Parish: Ashburton

Rainfall evidence

Daily rainfall at the matched gauge (Austins Bridge) for the spill day and the days before. A spill is dry when every day in the window is ≤ 0.25 mm.

1-day window: No rain data3-day window: No rain data4-day window: No rain data

Date	Rainfall
20/12/2020 (spill day)	no data
19/12/2020	no data
18/12/2020	no data
17/12/2020	no data
16/12/2020	no data

River flow that day: —. Verify at the EA rainfall station.

Gauge proximity

Outlet (red) vs matched rain gauge (blue), 3.6 km apart. Closer means the rainfall reading is more representative of the overflow.

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Severity & context

Bathing water: Not Applicable
Shellfish water: Not Applicable
Ahead of the works: Yes — the treatment works' own overflow stayed shut that day, so capacity was available. Avoidable.
EA annual return (2020): 53 counted spills · 135 h total
Monitor uptime (2020): 100% operational

Method & provenance. Dry/wet classification is decided by rainfall at the nearest EA gauge — ≤ 0.25 mm on the spill day and each preceding day of the window (how we classify). Spill data: Environment Agency EDM (outlet SBB01186). Rainfall: EA Hydrology gauge fd8ea26c-8052-48c5-a1bb-bbd5ebbbb3d3_364176. A dry spill is precautionary evidence of a likely fault, not proof of an offence — we test the rainfall, not the works' flow. Generated by River Hub.