![12 pompes 1000 m³/h](https://www.dsl.fr/app/uploads/2020/09/by-pass-d-un-cours-d-eau.jpg)
Bypassing a Watercourse
Bypassing a watercourse and drying the site to install channelling
Context
Project Type :
Pumping Solutions
Location :
Coudures (40)
![Logo entreprise Eiffage](https://www.dsl.fr/app/uploads/2020/09/logo-eiffage.gif)
![Logo entreprise DLE Spécialités](https://www.dsl.fr/app/uploads/2020/09/logo-dle.gif)
Problem
- EIFFAGE undertook the installation of a gas pipeline which had to pass under the bed of the Lac du Gabas
- To do this, it was necessary to divert the watercourse over 100 metres for the duration of works, and lower the water table in the dry bed
Solution
Supply, installation, testing and commissioning of a pumping solution of 15 000 m³/h:
- 12 dewatering pumps of 1000 m³/h for bypassing a watercourse
- 3 pumps of 1000 m³/h at the bottom of the trench
- 4 leader lines of 170 metres of Ø 400 mm
- 3 generators of 500 kVA with back-up
- 3 tanks of fuel totalling 9 000 L
- Progressive start cabinets, distribution cabinets and mobile telephony remote monitoring cabinet
- Presence of a DSL engineer on site throughout the whole operation
- Remote monitoring and on-call service 24/7
- Duration: 20 days of operation
![](https://www.dsl.fr/app/uploads/2020/09/by-pass-d-un-cours-d-eau-1.jpg)
![](https://www.dsl.fr/app/uploads/2020/09/by-pass-d-un-cours-d-eau-2.jpg)
![](https://www.dsl.fr/app/uploads/2020/09/by-pass-d-un-cours-d-eau-3.jpg)
![](https://www.dsl.fr/app/uploads/2020/09/by-pass-d-un-cours-d-eau-4.jpg)
![](https://www.dsl.fr/app/uploads/2020/09/by-pass-d-un-cours-d-eau-5.jpg)