No development in the SFHA shall create a damaging or potentially damaging increase in flood heights or velocity or threat to public health and safety.
(A) Standards within riverine SFHAs. Within all riverine SFHAs, the following standards shall apply:
(1) In addition to the other requirements of this chapter, a development permit for a site located in a floodway (or in a riverine SFHA where no floodway has been identified) shall not be issued unless the applicant first obtains a permit or written documentation that a permit is not required from the Illinois Department of Transportation, Division of Water Resources, issued pursuant to 615 ILCS 5/5 et seq.;
(2) The following activities may be constructed without the individual permit required in division (A)(1) above in accordance with statewide permits issued by the Illinois Department of Transportation, Division of Water Resources, provided the activities do not involve placement of fill, change of grade, or construction in the normal channel. Such activities must still meet the other requirements of this chapter:
(a) The construction of wells, septic tanks, and underground utility lines not crossing a lake or stream;
(b) The construction of light poles, sign posts, and similar structures;
(c) The construction of sidewalks, driveways, athletic fields (excluding fences), patios, and similar surfaces which are built at grade;
(d) The construction of property anchored buildings not exceeding 70 square feet in size, nor ten feet in any dimension (e.g. animal shelters and tool sheds); and
(e) The construction of additions to existing buildings which do not increase the first floor area by more than 20%, which are located on the upstream or downstream side of the existing building, and which do not extend beyond the sides of the existing building that are parallel to the flow of flood waters.
(3) The total cumulative effect of the proposed development, when combined with all other existing and anticipated development, will not increase the base flood elevation more than one foot for the affected hydraulic reach of the stream and will not increase flood damages or potential flood damages.
(B) Public health standards in all SFHAs.
(1) No development in the SFHA shall include locating or storing chemicals, explosives, buoyant materials, flammable liquids, pollutants, or other hazardous or toxic materials below the FPE a unless such materials are stored in a storage tank or floodproofed building constructed according to the requirements of § 151.07(A)(3).
(2) New and replacement sanitary sewer lines and on-site waste disposal systems may be permitted providing all manholes or other above ground openings located below the PFE are water-tight.
(Prior Code, § 151.06) (Ord. 89-9, passed 12-18-1989) Penalty, see § 151.99