Description of the contract
PLEASE SUBMIT QUOTES VIA EMAIL TO antony@northwalesriverstrust.org
Stock fencing ~ 990 m.
Fence to be constructed using FSC certified, UC4 treated timber and high tensile wire. Strainer posts to be 7-8” diameter and at start, end and major changes in direction, supported by braced struts. Turning posts 5-6” used at minor changes in direction or height. Intermediate posts 3-4” diameter and no more than 11’ apart.
80 cm sheep netting with two strands of barbed wire, one above and one below the netting. The finished fence height should be approximately 1.1m (44”).
Use of a track machine is obligatory due to wet ground conditions likely to be encountered.
Strainer posts and struts to be no closer than 2 m from the top of a steep bank, or if gentle sloped bank, no closer than 2 m to the water’s edge. The exact positioning of the fence will be agreed between the contractor, grazier, and NWRT before installation.
- Remove ~ 280 m of existing fence and dispose off-site.
- Supply and hang 4 x 12’ galvanised steel access gates at the locations indicated on the plans (excluding location at Photo 5, Figure 2). Gates should include self-closing springs with appropriate tie-back stakes/latches. Access gates should always be hung on gate posts which are railed to a strainer, never hung on the same post that wire is tensioned to.
Livestock bridge (near Photo 2, Figure 2)
- Erect post and rail fencing either side of the livestock bridge, ~ 40 m total length. Groundwork will be required to clear ~ 2.5 m of hedgerow and stone wall to allow stock access to the bridge.
Vehicle bridge (Photo 3, Figure 2)
- Erect post and rail fencing either side of the vehicle bridge (Photo), ~ 20 m total length.
- Resurface bridge. The bridge is constructed from railway sleepers on metal girders. Please specify your approach to resurfacing the bridge in your quotation – site visit advised.
Road access gate (Photo 5, Figure 2)
- Supply and install 1 x 16’ galvanised steel access gate. The road access is currently not wide enough for large farm vehicles. To widen access a section of stone wall, ~4’, will need to be removed. Improving road access and resurfacing the bridge will prevent use of the ford which is to be fenced off.
Water supply
- Supply and Install 1 x SPS-70 solar pump system (https://solarpumpsolutions.co.uk/,secured to concrete base to prevent theft. The pump should be located no more than 30m distance and 5m elevation from the watercourse. The system should be South facing with a clear, unobstructed view. Post and rail fencing should surround the pump to prevent damage by livestock. Replace stock battery with NWRT Supplied battery (if required). Landowner/tenant to keep stock battery as spare. Also see attached SPS guidance sheets for installation and priming.
- Piping – Dig trench to lay 540 m pipe. Where the pipe crosses pasture, the trench depth must exceed ploughing depth (minimum 30 cm depth). Pipe from watercourse abstraction point is to be one unbroken piece (no joints) of 25mm pipe, ~ 25 m. Piping from the water pump going to the troughs is to be 32mm ONLY with fast flow/low pressure ball valves on water troughs so water flow rate is not restricted. ANY joints fitted are to be suitable Plasson joints.
- Install 1 x sump abstraction point for solar pump system following design principles set out in technical note TN665 produced by the Farm Advisory Service. https://www.fas.scot/downloads/alternative-watering-field-grazed-livestock-i-abstraction-systems/ and see Figure X (Water housing figure). Due to in-river planning restrictions the sump abstraction system cannot be installed before mid-April 2024. Before installation of the sump the abstraction pipe to the solar pump should be temporally secured within the river channel at a suitably deep location but not in contact with the riverbed. Water housing to be installed in river to allow water abstraction – 300mm perforated twin walled pipe to be dug into riverbed with 110mm drainage pipe connected protruding out of the bank- see water housing diagram above (Figure 3).
- Supply and Install 5 x 75 gallon concrete drinking troughs with hardcore standing area at locations shown in plan. Troughs should be of suitable height for both sheep and cattle.
Tree Planting
- A total of 825 trees to be planted using the notch planting method. Plastic guards and wooden/bamboo canes to be used for all saplings and planted a minimum of 2.5 m apart. As many trees as possible should be sourced of a local origin https://naturalresources.wales/media/3119/choosing-provenance-in-broadleaved-trees.pdf. Species adapted to wet ground should constitute ~ 50% of the mix. Species recommended for wet ground are:
• Common alder
• Downy birch
• Hornbeam
• Pedunculate oak
• Sessile oak
• Black poplar
• Crack willow
• White willow
• Grey willow
• Bay willow
The tree planting area is ~ 1.5 ha. Much of this is rush pasture (~0.975 ha), and here trees are to be planted in the riparian zone and sporadically on appropriate patches of less damp ground. The aim is to obtain a mosaic habitat of trees, rushes, and meadow.
Tree planting can only commence when stock have been excluded from the tree planting zones (i.e., after installation of the stock fence and water supply). NWRT will provide the detailed design for tree planting.
All measurements are indicative, and quoted totals will be taken as definitive. It is the contractor’s obligation to clarify measurements to their own satisfaction, as adjustment to totals after completion cannot be made. Any additional works must be approved, otherwise payment cannot be made. Any brash clearing, tree work or other ground works required to install the scheme should be determined by the contractor and included in the initial quote.
It is the responsibility of the project officer and contractor to ensure that contracted works are not started WITHOUT A PROJECT OFFICER PRESENT. A project officer must be present at the beginning to brief all parties on the project. Failure to do so will void any contracts (and H&S policies) and payment may not be made. A project officer will meet you on the day of the works at 8am to outline the details. Please let NWRT know the times and dates of all works a minimum of 72 hours before the proposed works commence. A project officer may also follow up intermittently to check on the progress of the project (the frequency of this is dependent upon the complexity of the project). No other work than what is explicitly stated here is to be carried out unless approved by NWRT project manager. It is also the responsibility of the contractor to provide proof that all plant used are fit for purpose, as well as all relevant certifications.
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