(A) All manholes constructed on sanitary sewer systems shall be provided with lid frames bolted to the cone section of the manhole with rubber O-ring gaskets compressed between the frame and the top of the cone in accordance with the current “Standard Manhole Detail” of the Oakland County Department of Public Works.
(1) Adjustments to manhole tops shall be accomplished by using precast concrete adjustment rings bolted to the cone section of the manhole with rubber O-ring gaskets compressed between each adjacent ring.
(2) Mortar and brickwork adjustment at the top of manholes will not be allowed. All manhole riser and cone sections shall have modified groove tongue joint with rubber gasket.
(3) The bolted frame, bolts, adjustment rings and O-ring gaskets shall be in accordance with the standards of the Oakland County Department of Public Works.
(B) (1) All manholes shall be provided with “Bolted Waterproof Covers” in accordance with the current Standard Manhole Detail of the Oakland County Department of Public Works.
(2) Although not recommended, and only under certain circumstances, consideration will be given to the burying of manholes in lieu of providing bolted covers and only upon written request to the Oakland County Department of Public Works.
(Ord. 23.27, passed 1-8-90)