In the event the above priorities cannot be achieved, or where
it is required, the facilities may be dedicated to the municipality
in accordance with this chapter. As a condition of Borough acceptance
of said facilities, the applicant shall provide 15% of the cost of
improvements, in the form of a maintenance bond, as estimated by the
applicant's qualified professional, and approved by the municipality,
to cover contingency maintenance costs for 18 months from the date
of stormwater management facilities acceptance of dedication. The
15% bond shall be based on the construction costs of the detention
basin and outlet structure within the area dedicated to the municipality.