Wharfdale Storm Tank Design

Increasing Storm Capacity at Reduced TOTEX
ESL used a collaborative challenge approach during the design phase to consider pumped flows and repurposing of a redundant holding tank.
Discipline leads removed the need for the pumping station by identifying sufficient headroom within the storm hydraulics to create an additional 1000m3 storage.
We utilised a weir arrangement to continue pushing flows to existing storm tanks and linked the emptying controls to create an emptying sequence that did not overwhelm the return system.
We used storm tank cleaning with a vacuum flush system that enabled integration of the cleaning system and volume into the tank base design. This optimised the flush following storm events.
Project Outcome
From concept to detailed design and as built, we reduced CAPEX by a third and over halved OPEX to reduce TOTEX.
Self-flushing mechanism successfully utilised
Self-flushing mechanism now specified for other storm tank solutions
Project Details
- Client: Yorkshire Water
- Date: 2024/2025
- Category: Water Sector Engineering Design Solutions









