Adequate provisions shall be made to remove surface and subsurface water
from the road. The developer shall furnish and install all bridges, culverts
and catch basins, inlets, manholes, storm sewers, subdrains and other drainage
improvements required to drain properly the water accumulated by the development.
Such drainage facilities shall be located in the road right-of-way, where
feasible, or in perpetual, unobstructed easements of a minimum width of 20
feet. They shall be constructed in accordance with the following design criteria
and shown on the construction details. Stormwater in such a system shall be
delivered as directly as possible to the watercourse which served that watershed
prior to development.
The natural, excavated and embankment surface of the roadway adjacent
to both ends of all culverts and drains shall be protected from erosion or
displacement by headwalls of rubble stone masonry or concrete as shown on
the construction details, unless terminated by catch basins or other drainage
structures approved by town authority. If required, in the opinion of the
Town Engineer, wing walls shall be included in the headwall design. The upstream
and downstream areas at all headwalls shall be provided with dumped rip rap
stone of irregular shapes to dissipate the energy of the flowing stormwater.