Robinson_09051867__0386

extending at least three feet beyond the slopes of the
embankment, which trench is to be filled with stone
not exceeding twelve inches or less than five inches
in thickness, laid loosely, and in such a manner
as to allow a free passage of water through their
interstices, according to the directions of said
Engineer.

Paving[underlined], when used, will be generally laid
under culverts, one foot thick, as follows: the foun=
dation will be dug one foot in depth below the
walls, and the entire width, including water way,
filled six inches deep with sand; suitable
stone will be laid in the same, generally edge=
wise, and rammed into the sand with a heavy
hand maul, the interstices being filled with an
additional layer of sand, until the top of paving
presents a solid and uniform surface for com=
mencing the work of erecting the walls, of one foot
in thickness.

Mortar[underlined] — A separate price will be bid for
hydraulic cement mortar, which, when used,
unless otherwise directed by the Engineer, will be
composed of one part of the best quality of
hydraulic cement to two parts of clear, sharp sand
or of one part of well slacked lime to three parts of clear,
sharp sand, the whole work to be laid in a faith=
ful manner in full beds of mortar thoroughly
mixed.

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