However, with reference to the document accepted on 31/10/2014 in the Consultant's letter Pk4 - 0359/COT, the consultant cannot find the item referenced as page 1.The Contractor is requested to provide details of the approved full document and the reference number of the letter of acceptance by the Consultant. If this is additionnal methods then it should be so numbered in accordance with the original document.The issue in question is the method of blackfilling of the lage, natuaral drainage gullies that are present on the slope.Affter reviewing on site the Consultant's tunnel engineer believes that the method of filling the large guillies is innadequate and there is insufficient drainage provided. The consultant's tunnel engineer believes that the front face of the stone backfill should be mortared and the drainage pipes should be 100mm diameter. The number of pipes required will be determined by the size of the gully.The submission should reflect the above comment.The consultant advises that discussions are held on site the contractor's team in order to finalise a solution and submit for approval.The consultant thankss the contractor for this infomation.
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