← DARTINGTON SCH TWO_CSO_DARTINGTON
Spill evidence · Friends of the Dart
DARTINGTON SCH TWO_CSO_DARTINGTON
Combined sewer overflow · SBB00349 · feeds TOTNES STW
Dry spill
Evidence strength
Medium confidence- ✓ Dry across a 4-day antecedent window
- ✓ Monitor 100% operational that year
- ⚠ Short discharge (<1 h) — weaker signal
The discharge
- Spill day
- Monday, 3 March 2025
- Started
- 3 Mar 2025, 08:08
- Ended
- 3 Mar 2025, 08:43
- Duration
- 34 minutes 40 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: Dry spill4-day window: Dry spill
| Date | Rainfall | |
|---|---|---|
| 03/03/2025 (spill day) | 0.1 mm | dry |
| 02/03/2025 | 0.1 mm | dry |
| 01/03/2025 | 0.1 mm | dry |
| 28/02/2025 | 0.1 mm | dry |
| 27/02/2025 | 0 mm | dry |
River flow that day: 12.821 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 (2025)
- 45 counted spills · 508 h total
- Monitor uptime (2025)
- 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.