Tagged lagoon

Wessex Water & Kingcombe Aquacare – working together for all of us

Kingcombe Aquacare Ltd are proud to be framework contractors for Wessex Water Services Ltd. We have built up a good relationship based on trust, reliability and understanding the needs of our client.

We have been involved in a range of projects, including the relining of final settlement lagoons, the repair and prevention of erosion, specialist fabrication design, and environmental project control.

Final Settlement Lagoons

Final settlement lagoons are found at many sewage treatment sites and are used to impound the water from the treatment process before it is released in to a watercourse. This is to allow any remaining sediment to settle out to ensure that the cleanest possible water is allowed to enter our streams and rivers.

We have been asked by Wessex Water to carry out lining works to several final settlement lagoons. We have installed Firestone EPDM liners to these lagoons to improve the integrity and extend the lives of these valuable assets.

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Installing Firestone EPDM as a liner in a final settlement lagoon

Erosion repair/protection

The wet weather and high flows experienced in recent years have caused many stream and river banks to suffer accelerated erosion. Several Wessex Water outfalls have been affected with the river cutting away the banks around the asset and we have been called in to carry out repairs.

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Eroded bank adjacent to a treated water outfall – before…
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….and after “soft” engineering repair, using growing material to stabilise and reinforce the bank
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Because of the speed of the water we also have to use “hard” repairs. In this situation we have installed a 3m high rock gabion wall to protect the lagoons from the flow of water which was eroding the outside of the bend.

Environmental Works

We also get involved with environmental works for WW such as permit applications, surveys and monitoring. We were asked to monitor the controlled drain down of a small reservoir recently. This involved measuring and recording the dissolved oxygen and turbidity levels, fish containment and maintaining a watch over the general fish health. We are pleased to announce that no fish were hurt in the undertaking of these works!

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Electrofishing the outlet channel after a controlled reservoir draindown

To view our full list of services please see http://kingcombe.com/water-maintenance-services/

Kingcombe creates a new Blue Lagoon

Kingcombe has just completed the construction of another new lake, this time for a private client in Oxfordshire.

With approximately 3,000m2 surface area, the lake has been designed to create a conservation feature between the house and the woodlands below, acting as an environmentally beneficial interface between the domestic gardens and the wider landscape. Working with the Landscape Architect, Guy Thornton, we have been able to redefine the contours to create an aesthetically pleasing land form whilst remaining true to the historic character of the landscape.

Dug primarily into chalk, the lake has been lined with a 1.1mm Firestone EPDM waterproof membrane, sandwiched between two layers of 250gm geotextile and then surcharged with 200mm depth of the chalk substrate. Water supply is from a borehole delivering out of the chalk aquifer below. This combination has created the special circumstances for the unusually blue/green hue to the fresh water, which will be subdued just as soon as an organic layer builds up on the bed of the lake.

Water quality will be maintained by recirculating the water over a 25m stone cascade/stream flowing down over the hillside, which will introduce greater levels of dissolved oxygen. The banks have all been seeded with a wildflower mix, with additional aquatic marginals due to be planted in the Spring of 2017.

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Lining the lake with a 1.1mm Firestone EPDM waterproof membrane
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Work in progress
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The finished Blue Lagoon
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Site Manager, Grzegorz, sitting by the new stone cascade

To find out more, follow on to our ‘Lake Construction’ page http://kingcombe.com/water-maintenance-services/reservoirs-and-lakes/lake-construction/