A. Alteration or relocation of watercourse.
(1) No encroachment, alteration, or improvement of any kind shall be made to any watercourse until all adjacent municipalities which may be affected by such action have been notified by the City, and until all required permits or approvals have been first obtained from the Department of Environmental Protection Regional Office.
(2) No encroachment, alteration, or improvement of any kind shall be made to any watercourse unless it can be shown that the activity will not reduce or impede the flood-carrying capacity of the watercourse in any way.
(3) In addition, FEMA and the Pennsylvania Department of Community and Economic Development Department shall be notified prior to any alteration or relocation of any watercourse.
B. Alteration or changes to the base flood elevation. Technical or scientific data shall be submitted by the applicant to FEMA for a Conditional Letter of Map Revision (CLOMR), or a Letter of Map Revision (LOMR), or other activity resulting in changes in the BFE. The situations when a LOMR or a CLOMR are required are:
(1) For any development that will cause any rise in the base flood elevations within the Floodway Subdistrict;
(2) For any development occurring in the Zone A Subdistrict or Zone AE Without Floodway Subdistrict, which will cause a rise of more than one foot in the base flood elevation; or
(3) For alteration or relocation of a stream (including but not limited to installing culverts and bridges).
C. Alterations to the floodway.
(1) Within the Zone A Subdistrict or the Shallow Flooding Subdistrict, no new construction or development shall be located within the area measured 50 feet landward from the top-of-bank of any watercourse, unless a water obstruction permit is obtained from the Pennsylvania Department of Environmental Protection.
(2) For development in the Floodway Subdistrict and the Zone AE Without Floodway Subdistrict, refer to § 600-1818.
D. Any new construction, development, uses or activities allowed within any identified floodplain area or within the Floodplain Overlay Zone shall be undertaken in strict compliance with the provisions contained in this Part and all other applicable codes, ordinances and regulations.