Spill evidence · Friends of the Dart

MAYORS AVENUE SPST_PSCSO_DARTMOUTH

Pumping station overflow · SBB00755 · 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: Monday, 19 February 2024
Started: 19 Feb 2024, 09:30
Ended: 19 Feb 2024, 10:15
Duration: 45 minutes
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
19/02/2024 (spill day)	0.1 mm	dry
18/02/2024	0 mm	dry
17/02/2024	29.1 mm	rain
16/02/2024	0.5 mm	rain
15/02/2024	19 mm	rain

River flow that day: 30.094 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.

Loading map…

Severity & context

Bathing water: Dartmouth Castle and Sugary Cove; Warfleet Creek, Dart Estuary
Shellfish water: Not Applicable
Ahead of the works: Unknown (no works overflow data)
EA annual return (2024): 74 counted spills · 158 h total
Monitor uptime (2024): 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 SBB00755). 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.