Section 16.32.100 Drainage facilities.
A. The drainage system and facilities
required for any surface run-off affecting the
subdivision is subject to approval by the city. Applicant shall submit a grading plan from a
registered civil engineer or land surveyor indicating the proposed method for handling the on-site
and off-site water. Subdivisions containing lots less than twenty (20) acres in size also shall meet
the minimum drainage standards of the Montana Department of Health and Environmental
Sciences.
B. Curbs and gutters shall be required.
Curbs and gutters of adjoining properties shall be
extended according to current specifications of local and state authorities.
C. Culverts or bridges of adequate
size shall be provided and installed by the subdivider
where drainage channels intersect any street right-of-way or easement. All culverts shall extend
at least across the entire width of the base of the fill; the amount of backfill to be placed over the
culvert and the culvert's capacity shall be determined by a registered engineer. This shall include
arrangements for driveway culverts.
D. The subdivider shall provide suitable
drainage facilities for any surface run-off affecting
the subdivision; these facilities shall be located in street rights-of-way or in perpetual easements
of appropriate widths and are subject to approval by the city.
E. Each culvert or other drainage
facility shall be large enough to accommodate potential
run-off from upstream drainage areas.
F. Drainage systems shall not discharge
into any sanitary sewer facility.
G. The grading and drainage system
shall be designed and certified by a registered engineer.
H. The city may require the subdivider
to grant easements to prevent encroachment or
disruption of drainages or facilities. Drainage easements shall be drawn on the plat and a signed
statement granting the easements shall appear on the plat. (Ord. 131 (part), 1998: prior code §
16.01.040A-9)
