72.20.1. 
Any areas of the Municipality of Bethel Park classified as special flood hazard areas (SFHA) in the Flood Insurance Study (FIS) and the accompanying Flood Insurance Rate Map (FIRM) dated September 26, 2014, and issued by the Federal Emergency Management Agency (FEMA), or the most recent revision thereof, including digital data developed as part of the Flood Insurance Study.
72.20.2. 
The above-referenced FIS and FIRMs, and any subsequent revisions and amendments, are hereby adopted by the Municipality of Bethel Park and declared to be a part of this ordinance.
72.20.3. 
Any floodplain area along watercourses within the Municipality of Bethel Park, which is subject to the base flood and is not designated as a special flood hazard area on the Flood Insurance Study.
72.21.1. 
Floodway area:
1. 
The areas identified as "floodway" are as follows:
a. 
Areas designated as a floodway in the Flood Insurance Study prepared by FEMA, which represents the channel of the watercourse and adjacent areas that must be reserved in order to discharge the base flood.
b. 
In areas along a watercourse where no FEMA maps or studies have defined the boundary of the one-hundred-year storm frequency, it is assumed, absent evidence to the contrary, that the floodway extends from the stream to 50 feet landward from the top-of-bank of any watercourse.
c. 
Areas along watercourses which have been identified in other available studies or sources of information for those floodplain areas where no floodway has been identified in the Flood Insurance Study.
2. 
The following provisions shall apply to floodways:
a. 
No new construction, grading, substantial improvement, encroachments, or other development activities shall be permitted unless it has been demonstrated through hydrologic and hydraulic analysis prepared by a professional engineer or surveyor that the proposed encroachment would not result in any increase in the base flood levels within the Municipality and neighboring community during the occurrence of the base flood discharge; and
b. 
No new construction, grading or development shall be allowed unless a permit is obtained from the Department of Environmental Protection.
72.21.2. 
Special floodplain areas: the areas identified as Zone AE in the FIS prepared by FEMA for which the base flood elevations have been provided. The following provisions shall apply to special floodplain areas:
1. 
No new construction, grading or development shall be located within the area measured 50 feet landward from the top-of-bank of any watercourse or within the delineated floodway, whichever is more restrictive;
2. 
No new construction, grading or development shall be allowed unless it is demonstrated that the cumulative effect of the proposed construction or development, when combined with all other existing and anticipated development, will not increase the base flood elevation within the floodway or in the floodplain; and
3. 
No new construction, grading or development shall be allowed unless a permit is obtained from the Department of Environmental Protection.
72.21.3. 
Approximate floodplain area: the areas identified as Zone A in the FIS prepared by FEMA and other watercourses for which no base flood elevations have been provided. The following provisions shall apply to approximate floodplain areas:
1. 
No new construction, grading or development shall be located within the area measured 50 feet landward from the top-of-bank of any watercourse, unless a permit is obtained from the Department of Environmental Protection;
2. 
No new construction, grading or development shall be allowed unless it is demonstrated that the cumulative effect of the proposed construction or development, when combined with all other existing and anticipated development, will not increase the base flood elevation within the floodway and floodplain;
3. 
When available, information from other federal, state, and other acceptable sources shall be used to determine the base flood elevation, as well as a floodway area, if possible; and
4. 
The floodplain administrator will require the applicant to determine the base flood elevation with hydrologic and hydraulic engineering techniques. Hydrologic and hydraulic analyses shall be undertaken only by a professional engineer, who shall certify that the technical methods used correctly reflect currently accepted technical concept. Studies, analyses, computations, etc., shall be signed and sealed by the professional engineer and submitted in sufficient detail to allow a thorough technical review by the Municipality.
72.22.1. 
The identified floodplain area may be revised or modified by the Municipality where a hydrologic and hydraulic study prepared by a professional engineer or surveyor documents the need for such revision. However, prior to any such change, approval must be obtained from the Federal Emergency Management Agency by submitting the appropriate letter of map revision.
72.22.2. 
Technical or scientific data shall be submitted to the Municipality and FEMA for a letter of map revision (LMOR) within six months of the completion of any new construction, development, or other activity resulting in changes in the base flood elevation or the floodplain boundary.
72.22.3. 
All costs for submitting a floodplain map revision to FEMA shall be the responsibility of the developer or property owner. The developer will need to provide security for all costs related to the submission and approval of any map revision submitted to FEMA. The Municipality shall submit the map revision on the behalf of the developer or property owner.