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Bernardsville City Zoning Code

§ LD-12-29.7

Requirements for a Site Development Stormwater Plan Major Development.

[Amended 4-29-2024 by Ord. No. 2024-1998; 9-23-2024 by Ord. No. 2024-2005]
a. 
Submission of a Site Development Stormwater Plan.
1. 
Whenever an applicant seeks municipal approval of a development subject to this ordinance, the applicant shall submit a Site Development Stormwater Plan containing all of the required components listed at LD-12-29.7c below as part of the submission of the application for approval.
2. 
The applicant shall demonstrate that the project meets the standards set forth in this section.
3. 
When the submission of a Site Development Stormwater Plan is part of an application being reviewed as part of the review process by the Planning Board or Board of Adjustment, the number of copies of the documents listed in § LD-12-29.7c shall be as required by the appropriate application review checklist.
4. 
When the submission of a Site Development Stormwater Plan is being reviewed by the Borough Engineer, the applicant shall submit three copies of the materials listed in § LD-12-29.7c to the building department for distribution.
b. 
Site Development Stormwater Plan Approval.
The applicant's Site Development project shall be reviewed as a part of the review process by the municipal board or official from which municipal approval is sought. The municipal board or official shall consult the Borough Engineer to determine if all of the submission requirements have been satisfied and to determine if the project meets the standards set forth in this section.
c. 
Submission of Site Development Stormwater Plan.
The following information shall be required:
1. 
Topographic Base Map. The topographic base map for the site being developed shall extend a minimum of 200 feet beyond the limits of the proposed development, at a scale of one inch equals 100 feet or greater, showing two-foot contour intervals. Upstream tributary drainage information shall be required when deemed necessary by the reviewing engineer. The topographic base map shall include existing surface water drainage, shorelines, steep slopes, soils, erodible soils, perennial or intermittent streams that drain into or upstream of the Category One waters, wetlands and flood plains along with their appropriate buffer strips, marshlands and other wetlands, pervious or vegetative surfaces, existing man-made structures, roads, bearing and distances of property lines, and significant natural and manmade features not otherwise shown.
2. 
Environmental Site Analysis.
A written and graphic description of the natural and man-made features of the site and its surroundings that includes a discussion of soil conditions, slopes, wetlands, waterways and vegetation on the site, with particular attention given to unique, unusual, or environmentally sensitive features and to those that provide particular opportunities or constraints for development shall be submitted.
3. 
Project Description and Site Plans.
A map (or maps) at the scale of the topographical base map indicating the location of existing and proposed buildings roads, parking areas, utilities, structural facilities for stormwater management and sediment control, and other permanent structures shall be provided. The map(s) shall also clearly show areas where alterations will occur in the natural terrain and cover, including lawns and other landscaping, and seasonal high groundwater elevations. A written description of the site plan and justification for proposed changes in natural conditions shall also be provided.
4. 
Land Use Planning and Source Control Plan.
This plan shall provide a demonstration of how the goals and standards of § LD-12-29.3 are being met. The focus of this plan shall be to describe how the site is being developed to meet the objective of controlling groundwater recharge, stormwater quality and stormwater quantity problems at the source by land management and source controls whenever possible.
5. 
Stormwater Management Facilities Map.
The following information, illustrated on a map at a scale no smaller than one inch equals 50 feet, where the larger the second number, the smaller the scale, shall be included:
(a) 
Total area to be disturbed, paved or built upon, proposed surface contours, land area to be occupied by the stormwater management facilities and the type of vegetation thereon, and details of the proposed plan to control and dispose of stormwater.
(b) 
Details of all stormwater management facility designs, during and after construction, including discharge provisions, discharge capacity for each outlet at different levels of detention and emergency spillway provisions with maximum discharge capacity of each spillway.
6. 
Calculations.
(a) 
Comprehensive hydrologic and hydraulic design calculations for the predevelopment and post-development conditions for the design storms specified in § LD-12-29.3.
(b) 
When the proposed stormwater management control measures depend on the hydrologic properties of soils or require certain separation from the seasonal high-water table, then a soils report shall be submitted. The soils report shall be based on onsite boring logs or soil pit profiles. The number and location of required soil borings or soil pits shall be determined based on what is needed to determine the suitability and distribution of soils present at the location of the control measure.
7. 
Maintenance and Repair Plan.
The design and planning of the stormwater management facility shall meet the maintenance requirements of Section LD-12-29.9.
8. 
Waiver from Submission Requirements.
The municipal official or land use board reviewing an application under this ordinance may, in consultation with the Borough Engineer or the Borough's stormwater review engineer, waive submission of any of the requirements in § LD-12-29.7.c.1 through § LD-12-29.7.c.6 of this ordinance when it can be demonstrated that the information requested is impossible to obtain or it would create a hardship on the applicant to obtain and its absence will not materially affect the review process.
9. 
Application and Review Fees.
There shall be no additional initial escrow fees required for stormwater review for development applications being reviewed as part of an application to the Planning Board or the Zoning Board of Adjustment. Applications for stormwater management review to the Borough Engineer shall be accompanied by an initial review escrow deposit of $1,000 for major developments. If a project is approved, an inspection escrow deposit shall be made in an amount to be determined by the Borough Engineer in accordance with § LD-15-5, but in no case shall said inspection escrow by less than $500.