Upon recommendation of approval of the Preliminary Drainage Plans by the Plan Commission, Final Drainage Plans shall be submitted to the Department of Planning and Building. The final plans shall provide or be accompanied by tabular and graphical calculations, maps and/or other descriptive material showing the following:
a. The extent and area of each watershed tributary to the drainage channels in the development.
b. The street storm sewers and other storm drains to be built, the basis of their design, outfall and outlet locations and elevations, the receiving stream or channel and its high water elevation, and the functioning of the drains during high water conditions.
c. The parts of the proposed street system where pavements are planned to be depressed sufficiently to convey or temporarily store overflow from storm sewers and over the current runoff resulting from the heavier rainstorms and the outlets for such overflow.
d. Existing streams and floodplains to be maintained, and new channels to be constructed, their locations, cross sections and profiles.
e. Proposed culverts and bridges to be built, their materials, elevations, waterway openings and basis of their design.
f. Existing detention basins and ponds to be maintained, enlarged, or otherwise altered and new basins or ponds to be built and the basis of their design.
g. The estimated location and percentage of impervious surfaces existing and expected to be constructed when the development is completed.
h. The slope, type and size of all sewers and other waterways.
i. For all detention basins, a plot or tabulation of storage volumes with corresponding water surface elevations and a plot or tabulation of the basin outflow rates for those water surface elevations.
j. A routing path will be provided for runoff in the event the drainage facilities capacity is exceeded, and become part of a grading plan which will be submitted with detail plans.
k. Examine and show the routing of excess storm water though the site and as it is discharged to offsite lands.
l. The routing path shall be continuous from one development to the next.
m. If the decision is made by the Town of Schererville, through its Engineer, to handle storm water runoff by storage and releasing it at a regulated rate to prevent flooding downstream, the storage basin will be located in and become part of the routing path.
n. Construction site pollution control plan conforming to 327 IAC 15-5-7 or 7.5 and 327 IAC 15-13-15, including, at a minimum:
1. Completed sediment and erosion control plan;
2. Location and details of construction entrance;
3. Location of material stockpiles;
4. Location of storm water outlet or outlets; and
5. BMP practice details for all of above.
o. Construction site pollution control plan conforming to 327 IAC 15-13-15, including, at a minimum:
1. Location, size, section and details of temporary BMPs;
2. Location of concrete wash out site or sites;
3. Storage location of fuel, lubricant, solvent and other potential pollutants used at the site;
4. Location of scrap and waste material storage and ultimate disposal methods;
5. BMP practice details for all of above; and
6. Description of self-monitoring program.
p. Post-construction pollution control plan conforming to 327 IAC 15-5-6.5 and 15-13-16, including, at a minimum:
1. Location, size, section and details of permanent BMPs;
2. BMP practice details for each facility type;
3. Description of proposed maintenance program; and
4. Description of financial responsibility and assurance for maintenance program.
q. Copy of the NOI to be submitted to IDEM.
(Ord. No. 1708, 6-13-07)