No road, drainage structure, bridge, sidewalk or appurtenance to any the foregoing items shall be constructed by any person other than the Town of Newtown except in accordance with the terms of this chapter and after obtaining the permit required by § 185-41.
Roads shall have a minimum grade of 1% with a maximum grade
of 10%. Upon the written recommendation of the Engineer, when special
circumstances require, the Board of Selectmen may modify the maximum
grade in order to better conform with existing natural ground slopes.
Roads shall have a cross slope of 3/8 inch per foot each side
of the center line, except on curves where the design bank shall be
as suggested by the Town Engineer or First Selectman's agent.
Where appropriate to the description of materials, methods of
construction or design, the State of Connecticut, Department of Transportation,
Standard Specifications for Roads, Bridges and Incidental Construction
Form 814, 1989, hereinafter referred to as "Form 814," are hereby
incorporated by reference, except where inconsistent with the terms
of this chapter, and its successor, in which event this chapter shall
govern. A copy of Form 814 and its successor shall be available for
inspection in the office of the First Selectman during business hours.
All thicknesses required by this chapter are compacted thicknesses.
Curbs shall be installed on both sides of the road on the first
course of pavement prior to placing the second course of pavement.
The final curb height shall be six inches.
All proposed streets shall be designated as major collector,
minor collector or local residential by the Commission, upon recommendation
of the Town Engineer, prior to granting of the road permit and, where
applicable, approving the final subdivision plan. Standards are set
forth herein for all such streets.
A.
Major collector street.
(1)
The proposed street is a direct and logical continuation of the state
and local arterial highway system that carries or can be expected
to carry a heavy volume of traffic.
(2)
The proposed street may also provide a shorter or more convenient
through route, so that it can be reasonably expected to collect traffic
from other streets.
(3)
The proposed street is the particular collector of vehicles from
150 or more potential or existing homes in the area.
(4)
The proposed street could logically be expected to become a major
street because of proposed development or other foreseeable circumstances.
B.
Minor collector streets.
(1)
The proposed street is in an area zoned for business or industry
or is near the dividing line between a residential and business industrial
area so that it may reasonably be expected to carry a substantial
volume of commercial or industrial traffic.
(2)
The proposed street is the particular collector of vehicles from
75 to 150 potential or existing homes in the area.
(3)
The proposed street creates a shorter or more-convenient route between
a commercial or industrial area or the area containing 75 or more
homes and a major traffic artery.
(4)
The proposed street for any other reason may reasonably be expected
to carry a substantial volume of traffic.
C.
Local residential streets. The proposed street will serve only the
residential subdivision in which it is laid out and is not reasonably
expected to become a major or minor collector street.
D.
After classification by the Commission, each street shall have the
design and shall be built to the specifications set forth in the Table
of Street Classification and Design Standards found herein and made
a part hereof. Said standards are on file in the Town offices.
Sidewalks shall be constructed on both sides or either side
of all streets where specified by the Board of Selectmen and/or the
Commission as needed for the public health and safety.
A.
All roads shall be properly drained and shall have sufficient culverts,
manholes and catch basins installed as approved. No portion of any
road shall drain in one direction more than 300 feet without catch
basins on both sides of the road. In cases of extremely steep or flat
grades or excessively large drainage areas, the Commission and/or
the First Selectman may require installation of catch basins at lesser
intervals. Wherever water will discharge from a proposed street onto
land outside the street, whether or not owned by the owner, a drainage
easement in favor of the Town will be required. Said drainage easement
shall be a minimum of 30 feet wide with adequate access provided to
the drainage easement. Said easement shall be in a form acceptable
to the Town Counsel and where the construction is incidental to a
subdivision shall be clearly delineated on the subdivision plan to
be placed on the land records following approval. Where conditions
apparent in the field after the start of construction indicate that
additional or larger drainage pipes or structures (including, without
limitation, underdrains, catch basins and manholes) are necessary
in order to drain the street properly and in accordance with the intent
of the application, the First Selectman or his agent may order such
additional or larger drainage pipes or structures installed. If the
owner objects to such order, he may stop work and appeal to the Commission,
which shall determine whether or not such additional or larger drainage
pipes or structures would have been required before issuance of permit
had the circumstances causing the First Selectman or his agent to
issue the order originally been known to the Commission.
B.
Where drainage is tributary to a portion of a Connecticut Highway
Department drainage system, such drainage shall be approved by the
Connecticut Highway Department and such approval shall be submitted
to the Commission along with other required documents.
A.
Plan and profile drawings of all streets shall be submitted including
the following information:
(1)
Layout of proposed streets in both plan and profile indicating right-of-way
dimensions as shown on the final subdivision plan, width of right-of-way
and paving; existing grades at fifty-foot intervals at center line
and 25 feet right and left of center line, and proposed grades every
50 feet, vertical curve data and percent of grade.
(2)
Typical cross-section of the streets with paving, shoulders, curbs
and sidewalks in detail.
(3)
All utility lines, encroachment lines, easements for utilities, drainage and other rights-of-way, and the size and location of all existing and new drainage structures required pursuant to § 185-11.
(4)
All planned and profiled drawings shall be submitted in both paper
and electronic formats. The electronic format shall meet the following
criteria:
(a)
Drawings shall be on a compact disc (CD).
(b)
Electronics shall be in a format as described by the Town's
GIS coordinator.
(c)
A certification letter stating that the electronic drawing is
a copy of the survey map that was presented to the Commission shall
accompany electronic drawings. A land surveyor licensed by the State
of Connecticut shall certify the letter.
B.
Plan and profiles shall be at a scale of one inch equals 40 feet
in plan and one inch equals four feet in profile. Elevations shall
refer to USGS datum. Where required in the judgment of the Commission,
Town Engineer or agent, street intersections shall be developed at
a larger scale, showing catch basins, gutter, road center line, curb
and sidewalk elevations.
C.
If considered advisable by the Commission, Town Engineer or agent,
due to the terrain as determined from contours and the proposed profile
showing original and final grades, cross sections of the proposed
road shall be furnished by the applicant for the road permit at intervals
of every 50 feet showing the original ground, top and toe of slopes,
culverts or bridges. These sections shall extend at least 40 feet
left and right of center line and shall be based upon elevations obtained
by field survey.
D.
A drainage analysis map shall be submitted showing the watershed
area of all culverts, bridges and roadways, the rate of flow which
can be expected at the invert of each such culvert and bridge and
at each discharge point of the storm drainage system, and the downstream
area affected by the runoff from the street and subdivision drainage
system. All criteria and computations used to determine rates of flow,
pipe, culvert and bridge sizes shall be submitted on eight-and-one-half-inch
by eleven-inch sheets, certified by a professional engineer, and be
subject to review by Town Engineer. In case of a difference between
the professional opinions of the engineer of the applicant for a road
permit and Town Engineer as to the size of the pipe, culvert or bridge
required, the opinion of the Town Engineer shall control.
E.
All of the above documents shall bear the appropriate seal as recommended
by the Board of Registration for Professional Engineers and Land Surveyors
of the State of Connecticut.
F.
The above information and documents shall be submitted to the Commission and shall be referred to the First Selectman and Town Engineer by the Commission. Seven copies of the plan profile drawing and drainage analysis map will be submitted, except that the Commission may increase or decrease said number by amendment to the Code of the Town of Newtown, Connecticut, Chapter 560, Subdivision of Land.
All streets shall be developed to their full width in accordance
with the set of plans designated "Typical Street Cross Sections, Town
of Newtown." Copies of said plans are on file in the office of the
Town Engineer and may be obtained during normal business hours.
The following reference manuals shall govern as the Town's
specifications where this regulation is silent:
A.
State of Connecticut Department of Transportation Standard Specifications
for Roads, Bridges and Incidental Construction - Form 814, 1989 (as
amended).
B.
State of Connecticut Guidelines for Soil Erosion and Sediment Control
(1985, as amended).
C.
Connecticut Department of Transportation Drainage Manual (1973, as
amended).
D.
A Policy on Geometric Design of Rural Highways, AASHO (1965, as amended).
