If they release water two days before a heavy rainfall there will be floods; DAM SCHEME RAISES FEARS FOR HOMES.Byline: By HYWEL TREWYN
A FAMILY fear their home could be flooded if plans to raise a power station's dam go ahead.
In November, Snowdonia National Park Snowdonia National Park
Park, northern Wales. Established in 1951, it has an area of 838 sq mi (2,171 sq km). It is best known for its mountains, composed largely of volcanic rock and cut by valleys that show the influence of Ice Age glaciers. Authority gave First Hydro permission to raise Marchlyn Mawr Marchlyn Mawr reservoir is a high level lake in Snowdonia behind Elidir Fawr mountain. It is used as the high level water source for Dinorwig power station, a pump storage hydroelectricity scheme. Dam, near Llanberis, by loft and the water by 8ft to generate more electricity.
Angry villagers in Llanberis, Brynrefail and Cwm See Meta Data Coalition. y Glo have criticised the decision fearing it could lead to their homes being flooded.
First Hydro chiefs insist there is no danger and claim the move could actually lessen the risk of flooding.
Neil Roberts Neil Roberts may refer to:
Neil said: "We were flooded from both sides - from the lake and river - in February 2005 when the water came through our front door and into our two front rooms.
"I know people have had it a lot worse but it was heartbreaking."
Although some areas around Llanberis are marked as flood plains on the Environment Agency's flood map, the Roberts family are worried that not all potential areas are included.
"'I'm not an expert but I've lived here for some years and seen the water levels in the lake and river rise.
"A lot of local people are concerned. I'm worried if they release the water, say two days before a heavy rainfall over 24 hours that there will be floods. It adds to the risk."
Local people are now planning to get a petition together in opposition to the plans.
Many of them want First Hydro to carry out works at Pen Llyn and on the Afon Seiont to allow any floodwater flood·wa·ter
The water of a flood. Often used in the plural.
floodwater n → aguas fpl (de la inundación)
floodwater n to drain out and alleviate concerns.
First Hydro director Mike Hickey insisted that increasing the height of the dam "does not place the area at increased risk of flooding and residents should not be concerned."
The pumped storage power station can generate extra power for the National Grid almost instantly.
When electricity is needed, water is released from Marchlyn into Llyn Peris Llyn Peris is a lake in Snowdonia, Wales, approximately 1.8 km long and situated close to the villages of Llanberis and Nant Peris. The lake was formed glacially and is an example of a moraine-dammed lake. and energy is created by the downflow of water, which powers a set of generators to create electricity.
Water is pumped back to Marchlyn Mawr from Llyn Peris, usually overnight when electricity demand is at its lowest.
The building work is expected to take six months.
First Hydro spokesman Kevin Dibble said: "Local residents should not be concerned over the impact of this proposed scheme on existing flood protection arrangements. These will not change.
"Should the scheme go ahead there would be no change to the maximum operating level in the lower reservoir, Llyn Peris, that is, no increase in the amount of water in Llyn Peris.
"Llyn Peris would actually operate more frequently at lower levels than currently as more of the water available to the station can be stored at Marchlyn.
"The Environment Agency is fully aware of the scheme and is comfortable that there is no change to existing flood protection arrangements - the station will continue to comply with existing rules and agreements in place with the Agency.
"Details of the scheme are on display to the general public at our Electric Mountain visitor centre in Llanberis. This includes copies of the Environmental Impact Statement in which these issues are fully covered."
Neil and Cheryl Roberts, centre, and their children Katie and Mathew, fear their home could be flooded if plans to raise the Marchlyn Mawr Dam, near Llyn Padarn, go ahead. Inset: Villagers fear the villages of Llanberis, (top) Bry nrefail and Cwm y Glo (bottom) could all be under threat Pictures: ROBERT PARRY JONES