A.
General. Procedure shall include temperature and slope
corrections to distance measurements; the adjustment of closed baseline
traverses; the presentation of all necessary data clearly and completely;
and the use of proper methods to obtain the required standards of
accuracy.
B.
Surveying accuracy. The position closure of a traverse
after distribution of azimuth errors shall not exceed 1:5,000. Discrepancies
in levels between forward and backward runs shall not exceed 1/10
of a foot times the square root of the length of the section in miles.
C.
Mapping accuracy. The limits of error in any map shall
not exceed 1/10 inch between points as scaled on the original map.
The elevation error shall not exceed 1/2 of the contour interval.
D.
Monuments and bench marks.
(1)
Monuments shall be located in sufficient number to
control the subdivision but, as a minimum, they shall be located at
every point of tangency, point of curvature, point of deflection and
all intermediate points necessary to provide visibility between adjacent
monuments along one right-of-way line of each street. All easements
shall be similarly monumented. Iron pipes shall be located at all
lot corners and shall be located by reference to monuments.
(2)
Bench marks shall be set and marked with United States
Geological Survey elevation unless an assumed datum is allowed by
the Board. A minimum of one bench mark shall be required for subdivisions
of 25 acres or less, with an additional bench mark required for every
25 acres in excess of the first 25 acres to be developed.
(3)
Monuments and bench marks shall be carried from existing
monuments or bench marks and their origin noted on the subdivision
plat. Suitable primary control points shall be shown on the plat,
and all other dimensions, bearings, angles and similar data shall
be referred to them.
E.
Certification. The following certification, accompanied
by the imprint of the New York registration seal of the land surveyor
and his name, shall be included on the subdivision plat: "I hereby
certify this map to be substantially correct and in accordance with
the accuracy required by the Village of Menands Subdivision Standards."
A.
General. Streets shall follow low land whenever feasible.
When a subdivision street intersects an existing street, the Board
may require the owner to improve the existing street as necessary
to meet the requirements of these regulations for intersection design.
B.
Street width.
(1)
Subdivisions shall be laid out to provide the following
street and roadway widths unless otherwise shown on the Official Map.
|
Street Type
|
Right-of-Way Width
(feet)
|
Roadway Width
(feet)
| |
|---|---|---|---|
|
Collector
|
58
|
36
| |
|
Local
|
52
|
30
|
(2)
Roadways shall be centered in the right-of-way unless
approval to do otherwise is granted by the Board.
C.
Street alignment. Local street systems should be designed
to minimize through traffic movements. The minimum center line radius
for horizontal curves shall be 300 feet. A tangent of at least 200
feet shall be required between reverse curves.
D.
Street grades.
(1)
The maximum street grade shall be 8%. An exception
may be granted by the Board on a case-by-case basis where the developer
can demonstrate that such a modification is necessary for development
of the proposed project.
(2)
However, street grades shall not be less than 0.5%.
Grades at street intersections shall be held to a maximum of 3% for
a distance of 100 feet from the edge of pavement of the intersecting
street. Vertical parabolic curves shall be introduced at changes of
grade exceeding an algebraic difference of 1% and shall provide the
following minimum sight distances:
|
Street Type
|
Minimum Sight Distance
(feet)
| |
|---|---|---|
|
Collector
|
250
| |
|
Local
|
200
|
E.
Street intersections.
(1)
T-intersections shall be used in residential areas
where practical. Intersections of more than two streets shall be prohibited.
Intersecting streets shall be laid out so as to intersect at 90°
if feasible. An angle of intersection of less than 75° shall not
be permitted. Any change in street alignment to meet this requirement
shall extend at least 100 feet from the pavement edge of the intersecting
street.
(2)
Street right-of-way lines and roadways at intersections
shall be rounded with a radius determined from the following table
by the higher type of street forming the intersection:
|
Street Type
|
Minimum
Right-of-Way
Radius
(feet)
|
Minimum
Roadway
Radius
(feet)
| |
|---|---|---|---|
|
Arterial
|
Varies
|
Varies
| |
|
Collector
|
28
|
40
| |
|
Local
|
10
|
25
|
(3)
The radii given are for ninety-degree intersections,
and shorter radii at obtuse angles and greater radii at acute angles
may be required. Intersections with arterial streets shall be held
to a minimum and preferably spaced at least 1,000 feet apart.
(4)
Streets entering opposite sides of another street
shall be laid out either directly opposite one another or with a minimum
offset of 150 feet between their center lines.
F.
Dead-end streets. Dead-end streets shall not be longer
than 800 feet and shall be provided with a turnaround at the closed
end having a street right-of-way diameter of at least 140 feet and
an outside edge of pavement diameter of at least 110 feet. If an island
is left in the turnaround, it shall be nearly level to facilitate
snowplowing, and there shall be no curbs around the island. The turnaround
pavement shall slope to the outside of the circle. The pavement radius
at the entrance to the turnaround shall be at least 50 feet for symmetrical
turnarounds and greater for offset turnarounds. When a street is extended
beyond an intersection to make provision for its future extension,
a temporary turnaround shall be provided at the end of the street
unless no lots are served by the extension. The temporary turnaround
shall meet the requirements for a permanent turnaround.
G.
Street access. Access to arterial streets shall be
restricted as far as practicable.
I.
Fill slopes.
J.
Guide railing. Where streets are constructed on fills
of greater than 10 feet in height, corrugated-beam-type guide railing
shall be installed along the side of the road, nine feet from the
edge of the pavement. Other installation details shall be in accordance
with the New York State Department of Transportation Standard Sheet
for Corrugated-Beam-Type Guide Railing.
K.
Sidewalks. Sidewalks may be required along either
one or both sides of streets used for pedestrian access to schools,
parks, shopping areas and transit stops at the option of the Board.
A.
General. In designing for storm drainage, the Water
Pollution Control Federation Manual of Practice on Design and Construction
of Sanitary and Storm Sewers (MOP-9) shall be used as a guide. The
procedures of the manual are not binding and other good engineering
practices may be accepted by the Village.
B.
Design criteria.
(1)
All components shall be designed for runoff from the
entire contributing watershed, taking future development into account.
In addition, the design shall be considered as part of a larger storm
drainage system and shall provide drains to the limits of the subdivision.
(2)
The following criteria shall be used in designing
for storm drainage:
(a)
The Rational Method shall be used for all drainage
areas smaller than 100 acres. An approved method shall be used for
larger areas.
(b)
Runoff coefficient of not less than 0.35.
(c)
Inlet time not greater than 20 minutes from
the farthest point to the first inlet.
(d)
Rainfall intensity-duration-frequency curves
of the United States Weather Bureau for the Albany area shall be used.
(e)
Surface flow on streets shall be limited to
a maximum of 350 feet, and discharge shall be carried to a stream
with bed and banks or to an existing storm sewer of adequate capacity.
(f)
Gutter profiles may be required at intersections
which involve steep grades.
C.
Pipe. Required pipe sizes shall be determined by use
of the Manning formula. Full-pipe velocities shall not be less than
three feet per second. Full-pipe velocities greater than 10 feet per
second shall be avoided whenever possible. If such velocities are
unavoidable, measures shall be taken to protect pipe from scour. The
minimum size of pipe to be used shall be 12 inches. All pipe shall
be installed with a minimum of three feet of cover. Pipe shall be
designed for the overburden and any live loads it will be subject
to. The type and class of pipe and bedding conditions shall be specified.
All pipe junctions shall be in manholes or catch basins. Storm drainage
shall be designed to the limits of the subdivision and the upper end
shall terminate at a catch basin or manhole.
D.
Catch basins and manholes.
(1)
Catch basins, manholes, frames, covers and grates
shall conform to Village standards.
(2)
Storm inlets shall be located to intercept runoff
before it enters an intersection and at all low points. Catch basins
on storm mains shall be provided with sumps, unless otherwise directed
by the Village Superintendent of Public Works.
E.
Trash racks. Trash racks may be required where the
intake of branches or debris to the storm system may clog the line.
The design of the trash rack shall be based on the conditions and
requirements of each particular case.
F.
Grading. Lots shall be graded so that runoff from
roofs, drives and other impervious surfaces flows toward a street
except that such runoff may flow to the rear where a watercourse abuts
the rear of a lot. If it is not practicable to direct runoff to the
street, a grading plan for the area may be required by the Board.
Such grading plan shall show that grading is designed to prevent ponding
and to direct water away from all buildings.
A.
General. All components of sewage collection and disposal
systems shall be designed in accordance with the Standards for Waste
Treatment Works, Municipal Sewerage Facilities, New York State Department
of Environmental Conservation.
B.
Collection system. A collection system consisting
of house services and mains designed for the ultimate tributary population
shall be provided within the entire subdivision.
C.
House service. A typical house service connection
shall be shown on the plans.
A.
General. All components of the water system shall
meet the Recommended Standards for Water Works adopted by the Great
Lakes - Upper Mississippi River Board of Sanitary Engineers, including
all addendum thereto. Waterlines, valves and hydrants shall, in addition,
meet the Recommended Water System Design Standards of the Insurance
Services Office of New York. The design shall provide that additions
to the system can be constructed without interrupting normal service
or decreasing fire flows. All components shall be designed to provide
present and future service as required by the Official Map and any
water system plan adopted by the Village of Menands. Subdivision water
systems shall be connected to the Village system.
B.
Water mains. Pipe and fitting shall be of approved
materials and class. The class of pipe and type of material shall
be specified according to ground conditions, external loading (using
specified bedding) and internal pressure as determined by immediate
conditions and Village of Menands water system plans. Main sizes shall
be as required by the Village in accordance with Village water system
plans, with no main less than six inches in size. Dead-end mains shall
be avoided whenever feasible. When permitted, however, a hydrant shall
be installed. A six-inch main loop longer than the maximum length
permitted by the Recommended Water System Design Standards may be
permitted, provided that it is temporary and final construction drawings
show intersecting mains conforming to these design standards.
C.
Valves. Valves shall be American Water Works Association
gate valves of a type approved by the Village. Valves shall be installed
on every branch of an intersection, at every stub provided for future
expansion and as required by the Recommended Water System Design Standards
of the Insurance Services Office of New York. The owner may be allowed
to omit the valve on one branch line at intersections of lines of
minor importance. Valve boxes shall be installed for each valve. All
valves shall turn counterclockwise to open.
D.
Hydrants. Hydrants shall be of a type approved by
the Village and shall be installed in accordance with the Recommended
Water System Design Standards of the Insurance Services Office of
New York.
E.
Services. Services shall be of approved material of
at least three-fourths-inch inside diameter.
