The charity aims to build a small weir to channel water down an underground pipe to a 650kw turbine, housed in a building on the trust’s Hafod Y Llan farm near Beddgelert.
It is hoped that the scheme could generate enough power to run all of its Welsh properties, including castles, mansions, gardens, and 200 farms.
The National Trust said it had undertaken numerous consultations with the local community, and conducted surveys of the wildlife, archaeology, ecology as well as the river itself to ensure the proposal has minimal or no impact.
Keith Jones, environmental practices advisor, said:
"The proposed site on Afon Cwm Llan is absolutely perfect because the river is sterile due to its industrial past, and there is a history of hydro electricity in the area.”
Sulzer has launched a new global Center of Excellence (CoE) for Water Treatment Solutions - the CoE consolidates Sulzer’s wastewater treatment expertise in a unified and global manner.
“SAS (Surplus Activated Sludge) is a bit weird and 
Owen Mace has taken over as Director of the British Plastics Federation (BPF) Plastic Pipes Group on the retirement of Caroline Ayres. He was previously Standards and Technical Manager for the group.
PureTec Separations, the Ledbury-based water treatment engineering firm, has appointed Dan Norman as its new Sales Manager – Water Process Systems, supporting the company’s continued growth in the UK and international markets.
Hear how Scottish Water has completed its £235 million Ayrshire Glasgow Resilience Project - customers across Greater Glasgow, Ayrshire and East Renfrewshire will now benefit from a more secure and resilient water supply.
Hear how United Utilities is accelerating its investment to reduce spills from storm overflows across the Northwest.
Find out more about the remarkable career opportunities on offer at WSP - scroll down to watch the inspirational video.