Illinois Administrative Code › Title 17 - CONSERVATION › Part 3702 - CONSTRUCTION AND MAINTENANCE OF DAMS › Section 3702.60 - Application for Permit to Construct New Dams or Make Major Modifications to Existing Dams - Contents

Current through Register Vol. 48, No. 28, July 12, 2024
Application for a permit shall be made on forms provided by
				OWR. Separate applications are required for each dam. The application shall
				include, as a minimum:
a) Construction
			 plans and documents, sealed, signed and dated by an engineer, stating that the
			 dam design and construction documents have been prepared under the engineer's
			 personal supervision and are in conformance with this Part.
b) For all Class I and II dams, and for Class
			 III dams when the dam height multiplied by the impounding capacity is greater
			 than 300, computations for structural and geotechnical design of the
			 dam.
c) Computations for the
			 hydrologic and hydraulic design of the spillway or combination of the spillway
			 and the outlet works.
d) For Class
			 I and II dams, computations for the design flood and the 100-year frequency
			 flood routed through the design spillway system.
e) For Class I and II dams, computations for
			 the dam breach wave analysis for downstream impacts.
f) Computations of length of time required to
			 dewater the reservoir, together with a detailed plan indicating methods of
			 dewatering for normal and emergency conditions.
g) Computations for the design of minimum dam
			 height, including freeboard.
h)
			 Sketch showing flood plain land use downstream of the dam.
i) Computations for the design of the energy
			 dissipating structures, including an assessment of the impact of the design
			 discharges and other critical flows in downstream channels immediately below
			 the energy dissipators.
j) Time
			 schedule for the construction of the dam (applicant must notify OWR immediately
			 if any advances in the schedule are made).
k) Agreement of the applicant to provide
			 as-built plans and specifications upon completion of construction. These plans
			 and specifications shall be signed by the engineer or other qualified personnel
			 who was responsible for inspection during the construction.
l) For all Class I and II dams, a detailed
			 plan for inspection of the dam and its appurtenances during construction,
			 immediately after completion, at frequent intervals during initial filling of
			 the reservoir, and for a one-year period immediately following completion of
			 the filling. Inspections during the initial filling shall be conducted at least
			 every 30 days. Additional inspections will be required after major storms or
			 seismic events. Following a seismic event, OWR will consult with IEMA and
			 university seismic experts to determine when additional inspections will be
			 required.
m) For all Class I and II
			 dams, and for Class III dams when the height multiplied by impounding capacity
			 is greater than 300, authorization for the OWR, in the event that a dam is
			 found by OWR to be in imminent danger of failure, to enter upon the dam
			 property if necessary to prevent or alleviate dam breach damage pursuant to
			 Section
			 3702.190 and
			 agreement by the applicant to compensate the State for costs reasonably
			 incurred by emergency action.
n)
			 Right of access authorization for the OWR to inspect the dam site and immediate
			 vicinity before, during and after construction and for the life of the dam and
			 its appurtenances. OWR shall notify the owner 10 days in advance of any
			 inspection other than an emergency inspection.
o) For Class I and II dams, an operational
			 plan.
p) For all Class I and II
			 dams, and for Class III dams when the dam height multiplied by the impounding
			 capacity is greater than 300, a maintenance plan.
q) For Class I and II dams, a financial
			 responsibility statement.
r) Copies
			 of ownership documents or flood easement agreements for all land that will be
			 inundated in the reservoir up to the 100-year frequency flood pool elevation,
			 or hydraulic computations showing no increase in the flood pool elevations
			 above existing conditions for floods up to the 100-year frequency
			 flood.