Large diameter pipelines and culverts represent the backbone of any city’s utility network for the collection and disposal of sewerage and effective drainage of storm-water. In many cases the fabric of these pipelines, which may consist of brick, stone, concrete or clayware will have been constructed decades ago and although proven resilient, has eventually succumbed to the ravages of time, suffering the effects of H2S attack or erosion and may even be exhibiting signs of imminent failure due to structural loading beyond that of it’s remaining capability. At this point the need arises to consider the means by which the structural rehabilitation of these pipelines and ducts can be achieved whereby a new, 100-year plus life expectancy can be provided with a high degree of confidence. GRP structural lining solutions rehabilitate both circular and non-circular large diameter buried pipeline structures worldwide.