SECTION 15
EXISTING HIGHWAY FACILITIES
127
• At the option of the Contractor, raising devices may be used in place of
adjusting manholes to grade with new materials similar in character to those in the
original structure.
• Materials, workmanship and finish of the raising device and adjusted manhole
shall conform to the provisions in Section 75-1.02, "Miscellaneous Iron and Steel,"
except that galvanizing of raising devices will not be required.
• The shape and size of the raising devices shall match the existing frame and
shall produce an installation which is equal to or better than the existing installation
in stability, support and non-rocking characteristics. Each section of the raising
device shall be fastened securely to the existing frame without projections above
the surface of the street or into the clear opening.
• Manholes and inlets to be adjusted by means of raising devices shall be
measured sufficiently in advance of the paving to permit fabrication of the raising
devices prior to paving operations. For identification, matching numbers shall be
painted on each structure and the raising device to be installed thereon.
• If the manhole cover is unstable or noisy under traffic, the conditions shall be
corrected by placing a coil of asphalt saturated rope, a plastic-type washer or
asphaltic compounds approved by the Engineer, on the cover seat.
• A structure located in the pavement area shall not be constructed to final grade
until the adjacent pavement or surfacing has been completed.
• Existing manholes shall be remodeled as shown on the plans and in accordance
with these specifications and the special provisions.
• Manholes that are to be lowered shall be removed as directed by the Engineer,
to an approximate depth of one meter {3.5 feet} below finished grade and shall
then be reconstructed with the proper taper to finished grade.
• When existing manholes or inlets are to be abandoned, pipes entering the
manhole or inlet shall be securely closed by a tight fitting plug or wall of minor
concrete not less than 150-mm {0.5-foot} thick, or by a tight brick wall not less
than 200-mm {0.67-foot} thick with cement mortar joints. Minor concrete shall
conform to the provisions in Section 90-10, "Minor Concrete." The bases of
manholes or inlets shall be broken in a manner to prevent entrapment of water. The
manhole or inlet shall be demolished to an elevation one meter {3.5 feet} below
finished grade and backfilled in conformance with the provisions in Section
19-3.06, "Structure Backfill."
15-2.05B Fences
• Corner posts with braces shall be placed at the junctions of reconstructed
fences and existing cross fences and the 2 fences properly fastened thereto.
• Gates to be reused shall be installed in reconstructed fences at the locations
designated by the Engineer.
• Clearing required for reconstructed fences shall conform to the provisions in
Section 80-1.03, "Clearing."
• Removing and reconstructing fence shall be performed in a manner that will
prevent the escape of livestock.
15-2.05C Extending Pipes
• Existing pipes shall be extended in accordance with the requirements for
installing new pipes.
• Existing headwalls or endwalls shall be removed and disposed of or moved to
the extended location as shown on the plans or directed by the Engineer.



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