A.
No regulated earth disturbance activities within the Township, unless exempt under criteria listed in § 172-6, shall proceed until approval by the Township Engineer of a BMP operations and maintenance plan, which describes how the permanent (e.g., postconstruction) stormwater BMPs will be properly operated and maintained and contains all stormwater management facilities and the design computations.
B.
Permit application.
(1)
Every applicant for an earth disturbance permit shall file a written application therefore with the Manager.
C.
BMP operations and maintenance plan.
(1)
Map(s) of the project area shall be submitted on fifteen-inch by eighteen-inch, eighteen-inch by thirty-inch or twenty-four-inch by thirty-six-inch sheets in a form that meets the requirements for recording at the offices of the Recorder of Deeds of Montgomery County.
(3)
The following items shall be included in the grading plan:
(a)
The name and address of the owner/applicant.
(b)
The lot or tax parcel number or street address of the site.
(c)
The name, address and seal of the registered professional engineer responsible for the preparation of the plan.
(d)
The location map showing relation of the site to adjoining properties and streets.
(e)
The North point.
(f)
Written and graphic scales.
(g)
A complete outline survey of the affected property showing all courses, distances, area and names of landowners of adjoining properties.
(h)
Natural features within the subject site or within 50 feet of any boundary of the site.
(i)
The locations of all existing utilities, sanitary sewers and water lines within 50 feet of any boundary of the site.
(j)
Proposed development.
[1]
Delineation of the limits of work and the areas to remain undisturbed.
[2]
Plan of the proposed finished contours at vertical intervals of two feet.
[3]
Areas of cuts and areas of fill.
[4]
Alterations to land surface and vegetative cover, including size and location of structures, roads, paved areas and other impervious surfaces.
[5]
Location of proposed utilities, sanitary sewers and water lines.
[6]
Location and nature of permanent stormwater management facilities.
(4)
The following items shall be included in the landscaping plan, on a separate sheet, superimposed upon the grading plan:
(a)
The name, address and seal of the registered landscape architect responsible for the preparation of the plan.
(d)
All proposed landscape and vegetative BMP measures.
(e)
A proposed planting schedule indicating the locations, species and sizes of plantings and seedings as may be required.
(f)
Maintenance requirements for plantings and seedings.
(g)
Locations and construction details of proposed retaining walls.
(h)
Any special soil and fill mediums, if applicable.
(5)
The following items shall be included in the drainage and sedimentation plan, on a separate sheet, superimposed upon the grading plan:
(a)
A mapping of the watershed area or areas in which the site is located (United States Coast and Geological Survey Quadrangle Map or similar) with predevelopment and post-development areas outlined.
(b)
The calculated runoffs from a the one- through one-hundred-year-frequency storms, in cubic feet per second, to all existing and proposed drainage structures and watercourses, based upon the computational method best suited to the watershed size of the project site.
(c)
A plan of the proposed stormwater drainage systems, including storm drainpipes and inlets, runoff control devices, drainage channels, swales, structures, detention basins and other stormwater management facilities and BMPs. All existing drainage features which are to be incorporated in the design shall be so identified with an explanation of the operations of the facilities. The drainage areas into each inlet or structure must be delineated on the plan of the stormwater drainage system.
(d)
Detailed designs for berm embankments, outlet structures and any appurtenances related to temporary basins and all stormwater and erosion and sedimentation control facilities, including but not limited to:
(e)
The proposed location of utilities and easements.
(6)
The following information shall be included in the narrative:
(a)
A general description of the proposed development.
(b)
A general description of temporary and permanent accelerated erosion control.
(c)
A general description of temporary and permanent sedimentation control.
(d)
A general description of stormwater management both during and after development.
(e)
A study of the watershed in which the site is located to assess the impact the proposal will have on downstream conditions.
(f)
Computations of the stormwater runoff for all points of runoff concentration before and after development, including:
[1]
The design computations for the stormwater drainage systems, including storm drain pipes and inlets, runoff control measures and culverts and drainage channels.
[2]
Computations of the stormwater runoff before, during and after construction, including all supporting material.
[3]
The flood routing and/or storage requirement calculations.
(g)
The estimated development schedule for the site, including:
[1]
Stripping and/or clearing.
[2]
Rough grading and installation of erosion and sediment control facilities and practices.
[3]
Installation of improvements, including streets, underground utilities, buildings, driveways, parking areas and other structures and facilities.
[4]
Final grading and vegetative establishment, including program of operations for conversion of erosion and sediment controls to permanent stormwater management facilities.
(h)
A map and statement describing temporary control measures and facilities for use during earthmoving.
(i)
A permanent stormwater management program.
(j)
Maintenance procedures and ownership arrangements for temporary and permanent stormwater management facilities, including BMPs.
[1]
Methods and frequency of removing and disposing of sediment and other materials from stormwater management facilities both during and upon completion of the project.
[2]
Proposed ownership and financial responsibility for permanent stormwater management facilities, including BMPs.
[3]
Operating and maintenance arrangements for permanent stormwater management facilities and BMPs, including the identity of the person(s) responsible for such operations and maintenance.
(k)
A statement, signed by the landowner, acknowledging that the stormwater management facilities and BMPs are fixtures that can be altered or removed only after approval by the Township.