Spill evidence · Friends of the River Teign

Ayliffe's Field, Bovey Tracey

Combined sewer overflow · SBB00061 · feeds HEATHFIELD STW

Wet weather

The discharge

Spill day: Sunday, 24 September 2023
Started: 24 Sept 2023, 08:11
Ended: 24 Sept 2023, 11:04
Duration: 2 hours 53 minutes
Receiving water: Lower Bovey
Parish: Bovey Tracey

Rainfall evidence

Daily rainfall at the matched gauge (Bovey Tracey) 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: Wet weather3-day window: Wet weather4-day window: Wet weather

Date	Rainfall
24/09/2023 (spill day)	10.6 mm	rain
23/09/2023	9.5 mm	rain
22/09/2023	0 mm	dry
21/09/2023	10.3 mm	rain
20/09/2023	16.4 mm	rain

River flow that day: 3.294 m³/s. Verify at the EA rainfall station.

Gauge proximity

Outlet (red) vs matched rain gauge (blue), 3.1 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: Teign Estuary
Ahead of the works: Yes — the treatment works' own overflow stayed shut that day, so capacity was available. Avoidable.
EA annual return (2023): 66 counted spills · 260 h total
Monitor uptime (2023): 91% 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 SBB00061). Rainfall: EA Hydrology gauge de3285a5-0abf-4c5b-8ee2-63187f9124ae. 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.