ENV-CoW LtdEnvironmental assurance bulletins Bulletin libraryBefore the pump starts
Temporary excavation dewatering: five gates before pumping
Issue 02 · October 2026Issue 02 · October 2026
Before the pump starts
Temporary excavation dewatering can create two separate regulatory decisions—one at the excavation and one at the end of the hose.
This practical bulletin helps construction teams establish the water source, trace the complete route, identify the relevant regulatory route, build workable controls and define when pumping must stop.
- Applies to
- England
- Guidance checked
- 14 October 2026
- Focus
- Construction dewatering
The five-gate check
Make the decision before the pump is switched on
The bulletin includes a fictional worksite example and a concise five-gate pre-start check that can be used to structure a site-team conversation.
- Source — establish what water is entering the excavation.
- Destination — trace the complete route to the final receiving point.
- Authority — confirm every permission, exemption or regulatory route.
- Control — put treatment, monitoring and emergency controls in place.
- Change — define the conditions that require pumping to stop and be reviewed.
This bulletin is general information, not legal advice or a site-specific assessment. Projects must check current Environment Agency guidance and all applicable permissions before acting.