General. Before approval of a subdivision, the developer shall
prepare and submit for approval of the Planning Board or its agent
an erosion control plan covering all phases of construction for the
area in which work is to be performed. The area shall be specified
and may include the portion of work within the right-of-way or may
include all or part of the lots depending on the extent of work and
location of wetlands. The following factors shall be considered in
such a program:
A. Construction activities shall be phased so that construction can
be completed rapidly and large areas are not left bare and exposed
for long periods.
B. Grading shall be kept at a minimum. Where possible, existing trees
and vegetation shall be protected and retained. Only undesirable trees
shall be removed.
C. Drainage shall be maintained by the contractor during construction.
Runoff shall be controlled and conveyed into storm sewers or other
outlets so it will not erode the land or cause off-site damage.
D. Critical areas, including embankments and slopes, exposed for periods
in excess of one month, shall be protected during construction with
mulch or temporary crop covers and with mechanical measures such as
diversions and prepared outlets.
E. Sediment basins, temporary and permanent, shall be constructed where
necessary to detain runoff and to trap sediment during construction.
F. Safe off-site disposal of runoff shall be provided, including the
increased runoff resulting from construction.
G. Permanent vegetation and erosion control structures, where necessary,
shall be installed as soon as possible. In all cases where rip-rap
is utilized, rip-rap shall be of a size specified by the Planning
Board or its agent and placed, rather than dumped.
(See Section 200 of the Highway Specifications.)
A. General. Adequate disposal of surface and subsurface water shall
be provided. Where pipes, manholes, and catch basins are required,
they shall be shown on the definitive plan.
B. Basins, manholes, and inlets (Section 201 of the Standard Specifications).
All basins, manholes, and inlet structures shall be constructed in
conformance with the latest Massachusetts Department of Transportation
construction standards. The standard depth of catch basins shall be
four feet below the invert of the lowest drain. Manholes shall be
constructed to the required depth at each junction point and shall
be as shown on the plan. Basin and inlet grates shall be of a type
approved by the Groveland Road Commissioner/Public Works Director.
(1) All catch basins, manholes and inlets shall have a minimum of two
courses of red sewer brick (concrete cement brick is not allowed)
under the frame of the cover or grate.
(2) All frames and covers or frames and grates shall be temporarily set
at subbase grade and be furnished with a "silt sack" or other erosion
device to prevent silt from entering the pipe system network.
(3) Prior to installation of the binder pavement, all frames and covers
or frames and grates shall be raised to binder grade by constructing
additional layers of red sewer brick and prior to the final pavement
placement steel extension rings, manufactured of A-36 steel, finished
with black asphalt paint, or approved equal, shall be installed to
raise the frame or grate to finished grade.
C. Culverts, storm drains, and sewer pipes. All pipes except sub-drains
shall be reinforced concrete pipe Type III, minimum, and shall be
selected in conformity with the requirements of the Standard Specifications.
All pipe shall be installed in accordance with the size and location
on the approved definitive plan. No backfilling of pipes shall be
done until the installation has been inspected by the Planning Board
or its agent. All drainage trenches shall be filled with clean gravel
borrow, Type B, in accordance with Section 150.
D. Sub-drains. Where sub-drains are required by the Planning Board,
Road Commissioner/Public Works Director or Planning Board engineer,
they shall be designed and constructed as detailed in the "Typical
Sub-drain" drawing, Detail B, as shown in the Appendix.
E. Fencing. Decorative landscape fencing shall be provided around all
open stormwater detention/retention areas. Fencing shall be a style
and height as approved by the Planning Board.
Where bikeways and walkways are required, they shall be constructed in accordance with the specifications for sidewalks above, except for the design standard requirement of §
70-4.13. Where bikeways and walkways intersect with sidewalks, leveling areas shall be provided. These leveling areas shall be shown in detail on the definitive plan for the subdivision. All bikeways shall conform to current Federal Highway Administration standards. Where trails have been relocated or otherwise disturbed, the developer shall ensure that they are readily passable on foot or horseback. They shall have solid footing, be level from side to side, neither ascend nor descend at an excessive slope and be clear of obstructions and other hazards.
Retaining walls, when required, shall be constructed of field
stone and mortar and shall be finished with a concrete cap to prevent
deterioration.
Where required by the Planning Board, a fire alarm system shall
be installed within the subdivision to conform with the specifications
of the Fire Department and shall be located as specified on the definitive
plan unless otherwise specified by the Planning Board.
No lot shall be considered complete until all stumps, brush,
roots, and like material and all trees, rocks, and boulders not intended
for preservation by the developer shall have been removed and disposed
of in a manner and place satisfactory to the Planning Board. Any fire
hazard shall be removed promptly to the satisfaction of the Fire Chief.
This section does not authorize the removal, including severing and
stripping, of soil, loam, sand, or gravel on such lot.
Any subdivision located in any part within an area subject to
flooding shall comply with the following:
A. Subdivision design shall be consistent with the need to minimize
flood damage within the flood-prone area, through use of open space
reservation, street profile design, and drainage.
B. All public utilities and facilities, such as sewer, gas, electrical,
and water systems, shall be located and constructed to minimize or
eliminate flood damage.
C. No increase in off-site discharge shall be permitted.
For the purpose of protecting the safety, convenience, and welfare
of the Town's inhabitants, for the provision of adequate access to
all of the lots in a subdivision by means that will be safe and convenient
for travel, for reducing the danger to life and limb in the operation
of motor vehicles, for securing safety in the case of fire, flood,
panic and other emergencies; under the authority of MGL c. 41, § 81M
as amended, the developer or his successor shall provide for the proper
maintenance, including snow removal, sand and salting, etc., and repair
of improvements during the period of construction and until the Town
votes to accept such improvements.
The developer shall provide competent supervision during the
development of the subdivision. If at any time it becomes apparent
to the Road Commissioner/Public Works Director or the Planning Board
that the supervision is not satisfactory, the Planning Board may order
the discontinuance of the development until competent supervision
is provided.
If the proposed development contains hazardous materials or
underground storage tank(s), the location and extent shall be shown
on the subdivision plans. All remedial work required shall be performed
in compliance with all local, state, and federal laws.