← Whiddon Down STW
Spill evidence · Friends of the River Teign
Whiddon Down STW
Storm overflow at the works · SBB01355 · feeds WHIDDON DOWN_STW_WHIDDON DOWN
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
- Wednesday, 16 August 2023
- Started
- 16 Aug 2023, 23:21
- Ended
- 17 Aug 2023, 00:03
- Duration
- 41 minutes 50 seconds
- Receiving water
- Fingle Brook
- Parish
- Drewsteignton
Rainfall evidence
Daily rainfall at the matched gauge (Sticklepath) 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 | |
|---|---|---|
| 16/08/2023 (spill day) | 0 mm | dry |
| 15/08/2023 | 0 mm | dry |
| 14/08/2023 | 0 mm | dry |
| 13/08/2023 | 2.8 mm | rain |
| 12/08/2023 | 0.5 mm | rain |
River flow that day: 1.205 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
- Not Applicable
- Shellfish water
- Not Applicable
- EA annual return (2023)
- 24 counted spills · 207 h total
- Monitor uptime (2023)
- 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 SBB01355). Rainfall: EA Hydrology gauge 8a94b829-d54c-402a-8586-b35cece06a2f_390511. 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.