Stormwater Management must be designed in accordance with Planning
& Zoning Board Rules and Regulations, Section 8.
Construction of all streets and drainage shall conform to the
requirements of the Standard Specifications to the extent such Standards
are not in conflict with These Regulations.
A. Grading.
(1) The applicant shall employ at his own expense an engineer or land
surveyor to set all lines and grades in a manner satisfactory to the
Board. The applicant shall obtain all required permits from the Department
of Public Works.
(2) The entire area within the right-of-way lines shall be cleared and
grubbed of all stumps, brush, roots, boulders, and like material.
All material shall be removed to a minimum of 15 1/2 inches depth
below the finished grade of the roadway or filled to a subgrade parallel
to the finished grade. (Refer to Table 3.)
(3) All unsuitable material below the subgrade shall be removed and shall
be replaced by material conforming to the Standard Specifications.
(4) If required by the Board at the design or construction phase, the
developer shall have a groundwater study performed by a Registered
Geotechnical Engineer, who shall make recommendations as to the requirement,
location and spacing of an adequate system of underdrains to remove
groundwater from the subgrade of subdivision streets. Such underdrains
shall be installed and tested at the time of construction of the streets
and all installation shall be subject to approval of the Board.
(5) Before the gravel base course is installed, the sub-base shall be
shaped to conform to the proposed cross section of the road and shall
be compacted in layers not exceeding 12 inches in depth except the
last layer shall not exceed four inches in depth.
(6) Where fill is required, it shall be placed in layers not deeper than
12 inches and shall be compacted as specified herein.
B. Binder Course.
(1) The binder course shall be Class I bituminous concrete base course,
Type I-1, in accordance with the Standard Specifications. It shall
be laid to a rolled depth as indicated in Table 3.
(2) In lieu of feathering the pavement around castings, the structures
must be set at the same height as the binder course and reset at the
time of placement of the wearing course.
(3) The construction of bituminous concrete pavement shall terminate
November 15 and shall not be resumed prior to April 1 except as determined
in writing by the Director of Public Works.
(4) The temperature of the mixture, within a tolerance of plus or minus
15° Fahrenheit (F), when delivered to the site, shall be governed
by the temperature of the base upon which the mix is placed in accordance
with the Standard Specifications.
(5) When the air temperature falls below 50° F., extra precautions
shall be taken in drying the aggregates, controlling the temperature
and compacting the mixture.
(6) The mixture shall be placed only upon approved surfaces that are
clean from foreign materials and are dry.
(7) No mixture shall be placed unless the breakdown and intermediate
rolling can be completed by the time the material has cooled to 170°
F. and provided that the density of the completed pavement attains
at least 95% of the laboratory compacted density.
C. Wearing Course. The wearing course shall be Class I, bituminous concrete
pavement, Type I-1, in accordance with the Standard Specifications.
It shall be laid to a rolled depth as indicated in Table 3.
D. Driveways. Driveway aprons shall be constructed to serve each lot,
paved in the same manner as, and in the same thickness of, the street,
and carefully graded to provide the unimpeded flow of runoff along
the gutter.
E. Planting Strips.
(1) Planting strips shall be provided on each side of the roadway. Where
sidewalks are required, the planting strip shall be between the travel
way and the sidewalk.
(2) The finished grade of such planting strips shall be 1/4 inch to one
foot zero inches sloping toward the roadway. Where unusual physical
land characteristics or topographic conditions exist, the Board may
approve the construction of a planting strip at a slope greater than
1/2 inch to one foot zero inches, provided the finished slope will
not project above or below a plane sloped three horizontal to one
vertical upward or downward from the edge of the roadway.
(3) The top six inches of planting strips shall consist of good quality
loam extending to the right-of-way, screened, raked, and rolled with
at least a one-hundred-pound roller to grade. The loam shall be seeded
with lawn grass seed applied in sufficient quantity to assure adequate
coverage, rolled when the loam is moist. Loaming and seeding shall
be in accordance with the Standard Specifications.
F. Side Slopes.
(1) The area in back of the sidewalk, or where no sidewalk is constructed,
in back of the required planting strip, shall be graded to a point
where it coincides with the finished grade of abutting lots in such
a manner that no portion thereof within the right-of-way lines of
the street will project above a plane sloped three horizontal to one
vertical from one foot beyond the edge of the sidewalk or grass lot,
or be below a plane sloped three horizontal to one vertical downward.
(2) The top six inches of side slopes shall consist of good quality loam
extending to the right-of-way, screen, raked, and rolled with at least
a one-hundred-pound roller to grade. The loam shall be seeded with
lawn grass seed applied in sufficient quantity to assure adequate
coverage, rolled when the loam is moist. Loaming and seeding shall
be in accordance with the Standard Specifications.
(3) Side slopes within the right-of-way are not allowed to exceed 3:1.
Side slopes adjacent to the right-of-way shall be acceptable to the
Board.
G. Street Name Signs.
(1) Street name signs shall be of design acceptable to the DPW Director,
shall contain the names of both intersecting streets and shall be
erected at each street intersection at the inside curb edge.
(2) Temporary street name signs shall be erected at the time work is
started in that portion of a subdivision at all points where permanent
signs will be required. Complete visibility of street name signs shall
be maintained by the developer until they are replaced by permanent
signs.
H. Monuments and Markers.
(1) Granite or reinforced concrete boundary monuments 42 inches minimum
in length dressed to five inches square minimum at the top with a
three-eighths-inch drill hole, or a marked metal disk at the top in
the center and not less than five inches square at the bottom, shall
be set to finish grade as shown on plans. If granite is used, a ferrous
metal rod shall be set adjacent to the monument to facilitate future
location.
(2) Boundary monuments shall be installed at all street intersections,
at all points of change in direction or curvature of street, at easements,
and at other points as shown on the Definitive plan, and where, in
the opinion of the Board, such boundary monuments are necessary.
(3) Where the site conditions make the setting of bounds impractical,
alternate types of permanent monumentation shall be used to the satisfaction
of the Board.
(4) A minimum of two permanent benchmarks shall be established within
each subdivision and shown on the plan. Permanent Reference Monuments
shall be installed along the perimeter of the lands to be subdivided
at intervals not to exceed 500 feet on long straight lines and at
all changes of directions of the perimeter except on very short or
irregular lines, where monuments shall not be required to be set at
intervals less than 100'.
I. Curbing.
(1) Slope-face granite edging shall be used for median strips and islands
only.
(2) Vertical granite curbing shall be VA-4; slope-face granite edging
shall be Type VB as specified in the Standard Specifications.
(3) As part of a Low Impact Development strategy, the Board may approve
other curbing types.
J. Bridges.
(1) Bridges shall be designed in accordance with the Standard Specifications.
(2) The applicant shall submit with the preliminary plan a separate plan
indicating, in general, the engineering characteristics of said bridge,
including but not limited thereto, sketches with a plan view, cross
section, and elevation indicating approach grades, abutments, materials,
loading, clearances, elevations, and other pertinent data necessary
to clearly indicate to the Board the intent of the applicant to construct
a bridge.
(3) The applicant shall submit with the definitive plan an outline specification
and a separate plan or plans prepared by a registered professional
engineer, drawn to a suitable scale, including but not limited thereto,
a plan view, cross section, elevation, structural plan with details,
completely dimensioned with material description, loading, abutment
design, elevations, clearances, and other pertinent data necessary
to be classified as construction drawings and specifications.
Two special concrete bounds at least 500 feet apart with disks
are to be shown on the plans parallel with the centerline of a straight
portion of the proposed main roadway in the grass strip on the opposite
side of the utility trench and include coordinates, NGVD elevation,
and bearing and distance between these special bounds. Calculations
are to be submitted by a MA licensed land surveyor showing the mathematical
tie-in to the Massachusetts State Plane Coordinates (1983) system.
The bounds are to be installed a minimum of four inches below finished
grade and capped with an adjustable box and removable cover prior
to construction of the roadway. A typical adjustable box and cover
is shown on Plate No. 3.
Standards not addressed within this Section shall conform to
the standards and requirements of the Massachusetts Highway Department.