← Drewsteignton STW, Chagford
Spill evidence · Friends of the River Teign
Drewsteignton STW, Chagford
Storm overflow at the works · SBB00376 · feeds DREWSTEIGNTON_STW_CHAGFORD
Dry spill
Evidence strength
Low confidence- ✓ Dry on the EA 1-day window
- ✓ Rain gauge close (≤5 km)
- ⚠ Short discharge (<1 h) — weaker signal
- ⚠ Monitor only 88% operational that year — data may be incomplete
The discharge
- Spill day
- Wednesday, 7 August 2024
- Started
- 7 Aug 2024, 11:48
- Ended
- 7 Aug 2024, 12:03
- Duration
- 15 minutes 30 seconds
- Receiving water
- Fingle Brook
- Parish
- Drewsteignton
Rainfall evidence
Daily rainfall at the matched gauge (Mardon Down) 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 | |
|---|---|---|
| 07/08/2024 (spill day) | 0.1 mm | dry |
| 06/08/2024 | 0.1 mm | dry |
| 05/08/2024 | 2.2 mm | rain |
| 04/08/2024 | 0.5 mm | rain |
| 03/08/2024 | 0 mm | dry |
River flow that day: 0.931 m³/s. Verify at the EA rainfall station.
Gauge proximity
Outlet (red) vs matched rain gauge (blue), 4.8 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
- EA annual return (2024)
- 126 counted spills · 535 h total
- Monitor uptime (2024)
- 88% 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 SBB00376). Rainfall: EA Hydrology gauge 323b21d8-c9a4-4681-bc5c-62d7337993ac. 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 Teign Data.