annual rate contract for services of unskilled labourers for different civil maintenance works at power station no i of tcfhp at leusipukuri darjeeling annual rate contract for services of unskilled labourers for different civil maintenance works at power station no i of tcfhp at leusipukuri darjeeling , service of 20 ( twenty ) numbers of unskilled labourers for cleaning of floating trash from head race channel trash rack and power house intake trash racks , sand/silt excavations , grass cutting , power house cleaning and other miscellaneous works as per direction of engineer-in-charge including hire charges of tools and tackles and cost of removal of carcasses if any . , service of additional unskilled labourers ( maximum 6 nos per day ) over the item no 1 for assisting diving teams for cleaning of underwater trash simultaneous in two bays from power house intake trash racks and for cleaning trash from head race channel bridge as and when required as per direction of engineer-in-charge including hire charges of tools and tackles .