← Dartington Sch Two
Spill evidence · Friends of the Dart
Dartington Sch Two
Combined sewer overflow · SBB00349 · feeds TOTNES STW
Dry spill
Evidence strength
Low confidence- ✓ Dry on the EA 1-day window
- ✓ Monitor 100% operational that year
- ⚠ Short discharge (<1 h) — weaker signal
The discharge
- Spill day
- Monday, 8 February 2021
- Started
- 8 Feb 2021, 11:32
- Ended
- 8 Feb 2021, 11:48
- Duration
- 16 minutes 10 seconds
- Receiving water
- Bidwell Brook
- Parish
- Dartington
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: Dry spill3-day window: Wet weather4-day window: Wet weather
| Date | Rainfall | |
|---|---|---|
| 08/02/2021 (spill day) | 0 mm | dry |
| 07/02/2021 | 0 mm | dry |
| 06/02/2021 | 1.3 mm | rain |
| 05/02/2021 | 0.6 mm | rain |
| 04/02/2021 | 3.5 mm | rain |
River flow that day: 14.319 m³/s. Verify at the EA rainfall station.
Gauge proximity
Outlet (red) vs matched rain gauge (blue), 5.1 km apart. Closer means the rainfall reading is more representative of the overflow.
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Severity & context
- Bathing water
- Steamer Quay, Dart Estuary
- Shellfish water
- Dart
- Ahead of the works
- Yes — the treatment works' own overflow stayed shut that day, so capacity was available. Avoidable.
- EA annual return (2021)
- 64 counted spills · 637 h total
- Monitor uptime (2021)
- 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 SBB00349). 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.