This section applies to all floodway areas on the floodplain zoning maps and those identified pursuant to Section 18.20.010E.
The following open space uses are allowed in the Floodway District and the floodway areas of the General Floodplain District, if: they are not prohibited by any other ordinance; they meet the standards in Sections 18.12.030 and 18.12.040; and all permits or certificates have been issued according to Section 18.28.010.
Nonstructural recreational uses, such as golf courses, tennis courts, archery ranges, picnic grounds, boat ramps, swimming areas, parks, wildlife and nature preserves, game farms, fish hatcheries, shooting, trap and skeet activities, hunting and fishing areas, and hiking and horseback riding trails, subject to the fill limitations of Section 18.12.030D.
Functionally water-dependent uses, such as docks, piers or wharves,
dams, flowage areas, culverts, navigational aids and river crossings
of transmission lines, and pipelines that comply with Chs. 30 and
31, Wis. Stats.
Portable latrines that are removed prior to flooding and systems
associated with recreational areas and Department-approved campgrounds
that meet the applicable provisions of local ordinances and Ch. SPS
383, Wis. Adm. Code.
Public or private wells used to obtain potable water for recreational
areas that meet the requirements of local ordinances and Chs. NR 811
and NR 812, Wis. Adm. Code.
Sanitary sewer or water supply lines to service existing or proposed
development located outside the floodway that complies with the regulations
for the floodplain area occupied.
Applicants shall provide an analysis calculating the effects of this proposal on the regional flood height to determine the effects of the proposal according to Sections 18.08.010 and 18.28.010B3. The analysis must be completed by a registered professional engineer in the state of Wisconsin.
Any encroachment in the regulatory floodway is prohibited unless the data submitted for Subsection A2 above demonstrates that the encroachment will cause no increase in flood elevations in flood events up to the base flood at any location or removes the encroached area from the regulatory floodway as provided in Section 18.04.050E.
Structures. Structures accessory to permanent open space uses, including
utility and sanitary facilities, or functionally dependent on a waterfront
location may be allowed by permit if the structures comply with the
following criteria:
Have the lowest floor elevated to or above the regional flood
elevation and be dry floodproofed so that the structure is watertight
with walls substantially impermeable to the passage of water and completely
dry to the flood protection elevation without human intervention during
flooding;
Be certified by a registered professional engineer or architect, through the use of a Federal Emergency Management Agency Floodproofing Certificate, that the design and methods of construction are in accordance with Section 18.12.030B7.
For a structure designed to allow the automatic entry of floodwaters below the Regional Flood Elevation, the applicant shall submit a plan that meets Section 18.12.030B1 through 5 and meets or exceeds the following standards:
The bottom of all openings shall be no higher than one foot
above the lowest adjacent grade; openings may be equipped with screens,
louvers, valves, or other coverings or devices provided that they
permit the automatic entry and exit of floodwaters, otherwise must
remain open;
Certification. Whenever floodproofing measures are required, a registered
professional engineer or architect shall certify that the following
floodproofing measures will be utilized, where appropriate, and are
adequate to withstand the flood depths, pressures, velocities, impact
and uplift forces and other factors associated with the regional flood:
Construction of wells, water supply systems and waste treatment systems so as to prevent the entrance of flood waters in such systems and must be in accordance with provisions in Section 18.12.040D and E;
No material is deposited in navigable waters unless a permit is issued
by the Department (WDNR) pursuant to Ch. 30. Wis. Stats., and a permit
pursuant to Section 404 of the Federal Water Pollution Control Act,
Amendments of 1972, 33 U.S.C. 1344 has been issued, if applicable,
and the other requirements of this section are met;
Any public or private sewage systems, except portable latrines that
are removed prior to flooding and systems associated with recreational
areas and Department approved campgrounds that meet the applicable
provisions of local ordinances and Ch. SPS 383, Wis. Adm. Code;
Any public or private wells which are used to obtain potable water,
except those for recreational areas that meet the requirements of
local ordinances and Chs. NR 811 and NR 812, Wis. Adm. Code;
Any sanitary sewer or water supply lines, except those to service
existing or proposed development located outside the floodway which
complies with the regulations for the floodplain area occupied.