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Penton Hook Angling Platforms

Thursday, September 29th, 2011

Five angling platforms were commissioned by the Environment Agency on Penton Hook Island near to Stains. The EA, Land & Water and a local angling group; the Thames Angling Conservancy (TAC) closely liaised with one another during the design stages to ensure that the platforms would both be functional but also practical to install bearing in mind that there is no access for plant onto the island.

Fishing Platforms at PentonEach platform varied in size but all were constructed to a design level that enabled them to be available for use during times of flooding.  Land & Water worked out of Penton Hook Marina to the south of the island and boated materials and equipment across to the island. 

The vertical bearers consisted of FSC/PEFC Oak with the completing fit out consisting of FSC/PEFC treated softwood. The decking came to site with anti slip inserts and kick boards completed the platform.  Steps were constructed to link up with previous built access.  The platforms were handed over to the angling community with positive acclaim For more information follow link.

Fishing Platforms at Penton Hook IslandFishing Platforms at Penton Hook Island Land and Water Case Study

 

 

Tilgate Dam

Tuesday, May 31st, 2011

Morrison Construction as Principal Contractor on the Flood Alleviation Scheme, employed Land & Water Services Ltd to carry out the specialist earthworks to raise the level of the existing dam and construct a new spillway.

Tilgate Dam from aboveAs part of ECI consultation previously provided, Land & Water together with their client, re-evaluated the works to include some distinctive ‘value engineering’ ideas. The inclusion of a wetland to increase biodiversity and wildlife habitat coupled with a significant reduction on the original schemes carbon footprint helped to define the final proposals. Instead of importing large volumes of material from off-site, the existing lake was drained down to allow for a haul road to be constructed within and along the east side of the lake. Material was then won from a borrow pit excavated at the south eastern end of the lake where material was won to increase the height of the existing dam.

This method negated the need for 6,000 lorry loads of imported material to be hauled to the site through busy suburban areas and past a school entrance. Using careful testing and thorough monitoring, Land & Water increased the height of the dam and constructed a new spillway, using materials, selectively won from the borrow pit with a limited amount of high specification clay (used under the spillway) imported by road.

The borrow pit was then transformed into a wetland with the introduction of reedbeds, improving not only the aesthetics of the area but creating a wildlife habitat and increasing biodiversity on the site and within the local community.

Tilgate Dam construction - Land & WaterTilgate Dam construction close to completion

 

 

 

 

 

Bay Wharf Dry Dock Construction

Friday, October 29th, 2010

Land & Water were commissioned to carry out the construction of 3 new dry docks.

Bay Wharf dry dock construction from above

The works consisted of the installation of 200m of LX27 sheet piles of various lengths, from 4m up to 12m and 9 tubular fender piles 18m long with a diameter of 610mm with another 24 tubular piles for a new crane platform. These piles were installed using movax piling rig.

The crane platform was constructed using a temporary support system of stub beams welded onto tubular piles, these had adjustable jacks & Megashor waling beams attached to carry the temporary support system. This system carried the full crane slab whilst under construction which was approx. 30m x 10m wide with the thickness of 550mm. This was poured in single operation with 185m³ of concrete placed in one day.

Bay Wharf dry dock construction buildingsBay Wharf dry dock construction

In addition to the piling works a new workshop and welfare facility was constructed using a steel portal framed building and associated drainage works.

 

River Kennet Fish Pass Installation

Tuesday, October 14th, 2008

The River Kennet runs through The Avington Estate in Berkshire, besides forming a stunning historic country estate the river also forms one of the counties most prestigious trout fly fisheries. The river is controlled in numerous sections by control structures hence forming impounded sections within the river lengths.

River Kennet Fish Pass Land & Water Case StudyLand & Water undertook the project working closely with the clients project engineers and consultants to form two natural fish passes. The passes were formed by excavation of channels under live river conditions with extensive controls to prevent silt migration whilst the works were undertaken. Erosion protection to the banks was undertaken with the placement of pre planted coir rolls staked into place with driven chestnut posts.  Native gravels were imported and placed to the bed of fish passes to form riffles, conditions in which the fish and ecology thrive. Other areas of river where large scale erosion had taken place were narrowed again by the installation of pre planted coir rolls which were backfilled with the previously excavated materials from the fish passes. A 20 metre weed rack which provided for further river impoundment was also removed with the deployment of a specialist diving team.

All works were undertaken with Land & Water specialist long reach excavator fleet operated with bio-degradable oils with the ability of being able to site the machine a minimum of 3 metres back from the river bank as part of the clients strict water vole habitat mitigation. Works were undertaken with Land & Water Services as the principal contractor and completed within a tight schedule and to budget.

River Kennet Fish Pass Land & Water Case Study DetailRiver Kennet Fish Pass Land & Water Case Study Long Reach