← Smith St, Dartmouth
Spill evidence · Friends of the Dart
Smith St, Dartmouth
Combined sewer overflow · SBB01095 · feeds DARTMOUTH 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
- Sunday, 6 September 2020
- Started
- 6 Sept 2020, 13:20
- Ended
- 6 Sept 2020, 13:35
- Duration
- 15 minutes 10 seconds
- Receiving water
- Dart (Tidal)
- Parish
- Dartmouth
Rainfall evidence
Daily rainfall at the matched gauge (Brixham) 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 | |
|---|---|---|
| 06/09/2020 (spill day) | 0.2 mm | dry |
| 05/09/2020 | 0 mm | dry |
| 04/09/2020 | 0.6 mm | rain |
| 03/09/2020 | 0.1 mm | dry |
| 02/09/2020 | 0.2 mm | dry |
River flow that day: —. Verify at the EA rainfall station.
Gauge proximity
Outlet (red) vs matched rain gauge (blue), 5.3 km apart. Closer means the rainfall reading is more representative of the overflow.
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Severity & context
- Bathing water
- Warfleet Creek, Dart Estuary
- Shellfish water
- Dart
- Ahead of the works
- Unknown (no works overflow data)
- EA annual return (2020)
- 102 counted spills · 198 h total
- Monitor uptime (2020)
- 100% operational
⚠ Coastal / tidal location — very short discharges around high tide can be monitor artefacts; corroborate with tide times before relying on short events here.
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 SBB01095). Rainfall: EA Hydrology gauge 9dba2bf3-f5ea-4616-ac8e-dce16dbc0dc8. 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.