For all activities by this chapter, the steps below shall be followed for submission. For any activities that require a PA DEP joint permit application and are regulated under Chapter 105 (Dam Safety and Waterway Management) or Chapter 106 (Floodplain Management) of PA DEP's rules and regulations, require a PennDOT highway occupancy permit, or require any other permit under applicable state or federal regulations, the permit(s) shall be part of the plan.
A. 
A stormwater management plan and report package shall be submitted by the developer as part of the preliminary plan submission for the regulated activity. This package shall consist, as a minimum, of a stormwater management plan as specified in § 257-11 of this chapter and a stormwater management report as specified in § 257-12 of this chapter.
B. 
Four copies of the stormwater management plan and report package shall be submitted.
C. 
Distribution of the packages will be as follows:
(1) 
Two copies to the Township accompanied by the requisite municipal review fee, as specified in this chapter.
(2) 
One copy to the Municipal Engineer.
(3) 
One copy to the County Planning Commission.
D. 
In addition to meeting the requirements of this article, package submissions must show that all other requirements specified in this chapter are met when applicable, specifically Article IV and V.
A. 
The stormwater management plan shall consist of all applicable maps and plans. A note on the maps shall refer to the associated computations stormwater management report and erosion and sedimentation control plan by title and date. The cover sheet of the computations and erosion and sedimentation control plan shall refer to the associated maps by title and dates. All stormwater management plan materials shall be submitted to the Township in a format that is clear, concise, legible, neat, and well organized; otherwise, the plan shall be disapproved and returned to the applicant.
B. 
The following items shall be included in the stormwater management plan:
(1) 
Map(s) of the project area shall be submitted on twenty-four-inch-by-thirty-six-inch sheets and shall be prepared in a form that meets the requirements for recording in the offices of the Recorder of Deeds of Washington County. The contents of the map(s) shall include, but not limited to:
(a) 
The location of the project relative to highways, municipalities or other identifiable landmarks.
(b) 
Existing contours at intervals of two feet. In areas of steep slopes (greater than 25%), five-foot contour intervals may be used.
(c) 
Existing steams, lakes, ponds, or other bodies of water within the project area.
(d) 
Other physical features including flood hazard boundaries, sinkholes, streams, existing drainage courses, areas of natural vegetation to be preserved, and the total extent of the upstream area draining through the site.
(e) 
The locations of all existing and proposed utilities, sanitary sewers, and water lines within 50 feet of property lines.
(f) 
An overlay showing soil names and boundaries.
(g) 
Proposed changes to the land surface and vegetative cover, including the type and amount of impervious area that would be added.
(h) 
Proposed structures, roads, paved areas, and buildings.
(i) 
Final contours at intervals of two feet. In areas of steep slopes (greater than 15%), five-foot contour intervals may be used.
(j) 
The name of the development, the name and address of the owner of the property, and the name of the individual or firm preparing the plan.
(k) 
The date of submission.
(l) 
A graphic and written scale of one inch equals no more than 50 feet; for tracts of 20 acres or more, the scale shall be one inch equals no more than 100 feet.
(m) 
A North arrow.
(n) 
The total tract boundary and size with distances marked to the nearest foot and bearings to the nearest degree,
(o) 
Existing and proposed land use(s).
(p) 
A key map showing all existing man-made features beyond the property boundary that would be affected by the project.
(q) 
Horizontal and vertical profiles of all piped and open channels, including hydraulic capacity.
(r) 
Overland drainage paths.
(s) 
A twenty-foot-wide access easement around all stormwater management facilities that would provide ingress from and egress to a public right-of-way.
(t) 
A note on the plan indicating the location and responsibility for maintenance of stormwater management facilities that would be located off site. All off-site facilities shall meet the performance standards and design criteria specified in this chapter.
(u) 
A construction detail of any improvements made to sinkholes and the location of all notice to be posted, as specified in this chapter.
(v) 
A statement, signed by the landowner, acknowledging the stormwater management system to be a permanent fixture that can be altered or removed only after approval of a revised plan by the Township.
(w) 
The following signature block for the Township: Cross Creek Township, on this date (date of signature), has reviewed and hereby certifies that the drainage plan meets all design standards and criteria required by this chapter.
(x) 
All stormwater management facilities must be located on a map and described in detail.
The stormwater management report shall consist of all applicable calculations, maps, and plans. All materials shall be submitted to the Township in a format that is clear, concise, legible, neat, and well organized; otherwise, the stormwater management report shall be disapproved and returned to the applicant. The following items shall be included in the stormwater management report:
A. 
General.
(1) 
General description of project.
(2) 
General description of permanent stormwater management techniques, including construction specifications of the materials to be used for stormwater management facilities.
(3) 
Complete hydrologic, hydraulic, and structural computations for all stormwater management facilities as specified in Article IV of this chapter.
B. 
A written description of the following information shall be submitted.
(1) 
The overall stormwater management concept for the project.
(2) 
Stormwater runoff computations as specified in this chapter.
(3) 
Stormwater management techniques to be applied both during and after development.
(4) 
Expected project time schedule.
C. 
Confirmation of soil erosion and sedimentation control plan approval, as required by the PA DEP and the Washington County Conservation District.
D. 
The effect of the project (in terms of runoff volumes and peak flows) on adjacent properties and on any existing municipal stormwater collection system that may receive runoff from the project site.
E. 
A declaration of adequacy ad highway occupancy permit from the PennDOT district office when utilization of a PennDOT storm drainage system is proposed.