§ SR-6. Layout requirements.

The preliminary layout shall be prepared by a licensed professional engineer and/or land surveyor, except that all drainage design shall be prepared by a licensed professional engineer, and shall provide the information noted in this section:

A. 

Drawing;

(1) 

The size shall be either:

(a) 

Thirty-six inches by 24 inches; or

(b) 

Thirty-six inches by 40 inches.

(2) 

The scale shall be suitable for property presentation. The minimum scale shall be one inch equals 100 feet.

B. 

Title block and notations:

(1) 

The North point and scale.

(2) 

The name of the subdivision.

(3) 

The post office address of the subdivision.

(4) 

The school district and fire district.

(5) 

The water company or district.

(6) 

The name and address of the subdivider.

(7) 

The name, address, license number and seal of the professional engineer and/or land surveyor who prepared the drawings.

(8) 

The total acreage of the entire tract and of each building zone district within the tract.

(9) 

The total number of proposed lots for the entire tract and for each section.

(10) 

The zoning district.

C. 

Key map:

(1) 

Scale: one inch equals 600 feet.

(2) 

Information:

(a) 

The relationship to the primary and secondary highway system and main intersections.

(b) 

Boundary lines: building zone district, special districts and municipal areas.

(c) 

Subdivision streets, blocks and recharge basins in scale.

(d) 

Match lines as needed when there are two or more drawings to show the complete subdivision.

D. 

Subdivision boundary description.

E. 

Boundaries of proposed sections numbered in accordance with an intended plan of development.

F. 

Boundaries and recorded owners of adjacent properties. Adjacent properties which are a part of a subdivision plat filed in the Suffolk County Clerk's office may be identified by subdivision name.

G. 

Other boundary lines:

(1) 

Building zone districts.

(2) 

School districts.

(3) 

Special districts.

(4) 

Incorporated areas.

H. 

Topographic contours at two-foot intervals in the United States Coast and Geodetic Survey datum of mean sea level.

(1) 

Smaller or larger intervals, when advisable due to the terrain, shall be used after approval by the Planning Board.

(2) 

Contours shall extend 200 feet beyond the subdivision boundary line.

I. 

Existing site conditions:

(1) 

Street rights-of-way on the subdivision and within 200 feet of its boundaries:

(a) 

Name.

(b) 

Location and width.

(c) 

Center-line elevations at intersections and other critical points.

(d) 

Extent and type of street improvements.

(2) 

Other rights-of-way and easements on the subdivision or within 200 feet of its boundaries:

(a) 

Identification.

(b) 

Location and width.

(c) 

Restrictions of use, if any.

(3) 

Drainage structures on the subdivision and within 200 feet of its boundaries:

(a) 

Type of structure.

(b) 

Location, invert elevations, gradients and sizes of all pipe and of all other structures, where applicable.

(4) 

Other utility structures, such as water and gas mains and power lines, on the subdivision and within 200 feet of its boundaries:

(a) 

Location and size or capacity.

(5) 

Marshes, ponds, streams or similar conditions on the subdivision and within 200 feet of its boundaries:

(a) 

Location and area covered, indicating apparent mean high water or normal water line if not subject to tidal effect.

(b) 

Water line referred to date of survey.

(c) 

Maximum depth of water at critical points.

(6) 

Test hole data:

(a) 

The date, location, elevation and graphic representation of findings for all test holes, including groundwater level.

(b) 

Locations shall include critical areas where drainage structures requiring seepage are to be constructed.

(7) 

Town or other public lands and lands designated as parks, open spaces or for some other public use.

(8) 

Buildings and other structures located on the subdivision and within 200 feet of its boundaries.

J. 

Proposed site conditions:

(1) 

Streets:

(a) 

Name.

(b) 

Right-of-way width.

(c) 

Tentative center-line elevations at intersections and at principal changes in gradient and rate of grades.

(2) 

Lot layout:

(a) 

Lot lines and dimensions to the nearest foot.

(b) 

Building setback line (dashed) and dimension.

(c) 

Easements and restricted areas with notation as to purpose or restriction.

(d) 

Identification of lots and parcels for special use to be offered for dedication.

(3) 

Preliminary stormwater drainage system plan:

(a) 

Storm drains and structures and the required capacity for each stormwater recharge basin shall be shown on the preliminary layout.

(b) 

Watershed outlines and their approximate area, in acres, including those which extend beyond the boundaries of the subdivision, shall be shown. If preferred, indicate this with colored pencil on two copies of the preliminary layout.