[Code 1964, § 26-24]
The owner of a tract may prepare and secure approval of a preliminary
subdivision plat of an entire area and may install the required improvements
only in a portion of such area. The improvements shall be installed
or provision made for their installation in any portion of the area
for which a final subdivision plat is approved for recording; provided,
however, that water mains, storm sewers, trunk sewers and any sewage
treatment plants shall be designed and built to serve the entire area
owned by the subdivider or designed and built in such a manner that
they can readily be expanded or extended to serve the entire area.
[Code 1964, § 26-25]
(a)
Arrangement and design. The lot arrangement and
design of a subdivision shall be such that all lots will provide satisfactory
and desirable building sites, properly related to topography and the
character of surrounding development.
(b)
Side lines; double frontage. All side lines of lots
shall be at right angles to straight street lines and radial to curved
street lines except where a variation of this rule will provide a
better street and lot layout. Lots with double frontage shall be avoided.
(c)
Dimensions. No lot shall have a depth of less than
one hundred (100) feet or a depth in excess of three (3) times its
width. No lot shall have an area or width less than that required
by the zoning ordinance.
(d)
Corner lot width. Corner lots shall have extra width
sufficient to permit the establishment of front building lines on
both the adjoining streets.
(e)
Corner lots at certain intersection. Lots at major
street intersections and at acute angle intersections of less than
eighty-five (85) degrees shall have a radius of twenty (20) feet at
the street corner. On business lots, a chord may be substituted for
the arc.
(f)
Irregular shaped lots. Where lots are irregular
in shape with frontage on a circular street or court at the termination
of a street, the frontage of the lot may be reduced below the minimum
frontage specified under the intensity of use provision for the zoning
district in which it is located; provided, that the width of the lot
at the building line shall be in accordance with the minimum frontage
specified for such zoning district.
[Code 1964, § 26-26]
The arrangement of streets and alleys in new subdivisions shall
make provision for the continuation of the existing streets in adjoining
areas, or their proper projection where adjoining land is not subdivided,
insofar as may be deemed necessary for public requirements. The width
of such streets in new subdivisions shall not be less than the minimum
widths established in this chapter. The street arrangements shall
not be such as to cause hardship to owners of adjoining property in
platting their own land and providing convenient access to it. Offset
streets shall be avoided. The angle of intersection between minor
streets and major streets shall not vary by more than ten (10) degrees
from a right angle. Streets obviously in alignment with existing streets
shall bear the names of the existing streets. Proposed street names
that are in conflict with existing street names shall not be approved.
[Code 1964, § 26-27]
(a)
Major streets. The widths and locations of major
streets in a subdivision shall conform to the widths and locations
designated on the major street plan.
(b)
Minor streets and collector streets. The minimum
width of right-of-way for minor streets shall be fifty (50) feet and
all collector streets as designated by the planning and zoning commission
shall have a right-of-way of sixty (60) feet. Whenever the subdivided
property adjoins a half street the remainder of the street shall be
dedicated.
(c)
Alleys. Alleys shall not be provided in a residential
block. Alleys or other adequate access for service are required in
the rear of all business lots and shall be at least twenty (20) feet
wide.
[Code 1964, § 26-28]
Courts, cul-de-sacs or other arrangements may be constructed
in a subdivision if proper access is given to all lots from a dedicated
and paved street or court. All cul-de-sacs shall terminate in a dedicated
street space having a minimum radius of fifty (50) feet or other satisfactory
means for the turning of vehicles.
[Code 1964, § 26-29]
Street name signs conforming to the standards and specifications
of the city shall be erected at all street intersections in a subdivision.
The placement and installation of such signs shall be subject to the
approval of the city engineer.
[Code 1964, § 26-30]
(a)
All subdivisions of land development within the city, in addition
to all requirements set up by this Code or any other ordinances of
the city, shall have adequate electric street lamps with underground
wiring, or adequate street lamps operated with natural gas supplied
by means of safe underground gas pipes.
(b)
Average horizontal foot-candles shall be two-tenths on traffic-used
pavements between curb lines. The lowest footcandle value at any point
on the pavement should not be less than the fraction of one-tenth
of the average. This subsection refers to pavements of good or medium
reflective value, concrete pavement that carries light vehicular and
pedestrian traffic. Where the pavement is to carry medium traffic
volume, the fraction one-fourth should be substituted for the fraction
one-tenth.
(c)
For pavements of poor reflective value such as asphalt pavements,
two-tenths and the fraction one-tenth in the base statement should
be replaced by three-tenths and the fraction one-fourth respectively.
[Code 1964, § 26-31]
All new streets in subdivisions shall be graded to their full
width and proper grade, including side slopes.
[Code 1964, § 26-32]
All new streets in subdivisions shall be surfaced between face
of curbs to a width of twenty-six (26) feet for minor streets and
thirty (30) feet for collector streets. Surfacing shall be concrete
of seven (7) inches minimum thickness in accordance with existing
city specifications and shall be subject to inspection and approval
by the city engineer.
[Code 1964, § 26-33]
Concrete sidewalks five (5) inches thick and not less than four
(4) feet in width shall be constructed along both sides of all major
and collector streets in a subdivision; except that, where the property
is platted in lots having an area of at least twenty thousand (20,000)
square feet and a width of at least one hundred (100) feet, the board
of aldermen may waive those requirements.
[Code 1964, § 26-34]
Easements of at least five (5) feet in width shall be provided
and dedicated on each side of all rear lot lines and where necessary
along side lot lines for poles, wires, conduits or storm and sanitary
sewers, gas, water or other mains. Easements of greater width may
be required along or across lots where necessary for the extension
of main sewers or other utilities or where both water and sewer lines
are located in the same easement.
[Code 1964, § 26-35]
Whenever any stream or important surface drainage course is
located in any area which is being subdivided, the subdivider shall
provide an adequate easement as determined by the city engineer along
each side of the stream for the purpose of widening, deepening, sloping,
improving or protecting the stream.
[Code 1964, § 26-36]
Each lot within a subdivision shall be provided with a connection
to an approved public water supply. Fire hydrants shall be installed
in all subdivisions in compliance with existing fire district regulations.
[Code 1964, § 26-37]
(a)
Where a public sanitary sewer is reasonably accessible, each lot
within the subdivided area shall be provided with a connection to
such sanitary sewer. The sewer connection shall terminate not less
than two (2) feet inside the lot line. All sewer connections and the
subdivision sewer system shall comply with the regulations of the
state board of health and shall be constructed under the supervision
and subject to the approval of the St. Louis Metropolitan Sewer District.
(b)
Where a public sanitary sewer is not reasonably accessible but where
plans for the installation of sanitary sewers in the vicinity of a
subdivision have been prepared and approved by the St. Louis Metropolitan
Sewer District, the subdivider shall install sewers in conformity
with such plans. In such cases until a connection can be made with
the public sewer system the use of a sewage treatment plant will be
permitted in accordance with Article XVI of the Zoning Ordinance;
provided, that such disposal facilities are constructed in accordance
with the standards and requirements of the state board of health and
are approved by the county health department.
(c)
Where sewers are not accessible and no plans for sewers have been
prepared, the subdivider may be required to install sewer lines and
a disposal system in accordance with the requirements of this section,
or if the subdivision has been platted into lots having a minimum
width of one hundred (100) feet and an average area of twenty thousand
(20,000) feet or more he may install individual disposal devices for
each lot at the time improvements are erected thereon. All such individual
sewage disposal systems shall be constructed in accordance with regulations
and requirements of the state board of health and subject to the inspection
and approval of the county health department and the county board
of plumbing supervisors.
[Code 1964, § 26-38]
A subdivision plat shall be laid out so as to provide adequate
drainage of the area being subdivided. Drainage improvements shall
maintain any natural watercourse and shall prevent the collection
of water in any low spot. A storm sewer system approved by the city
engineer and the metropolitan sewer district shall be provided where
necessary for adequate drainage.
[Code 1964, § 26-39]
In subdividing property consideration shall be given to suitable
sites for schools, parks, playgrounds and other areas for public use
so as to conform to the recommendations of the planning and zoning
commission in its adopted master plan or portion thereof of the city.
Any provision for schools or parks and playgrounds should be indicated
on the preliminary plat in order that it may be determined when and
in what manner such areas will be dedicated to or acquired by the
appropriate taxing agency.
[Code 1964, § 26-40]
Every subdivider shall plant trees on all streets in new residential
subdivisions that are not located in wooded areas. Such trees shall
be provided in the ratio of not less than one (1) tree for each residential
lot, which trees shall not be less than two (2) inches in diameter
at a height of one (1) foot above the ground. The trees planted shall
be of species such as hard maples, pin oaks, gingkos, tulip trees
and sweet gum which are suitable to this area and unlikely to become
nuisances because of insects, disease or other factors.
[Code 1964, § 26-41]
All subdivision boundary corners and the centers of all street
intersections shall be marked with permanent survey monuments. All
points of tangency and points of curvature of all curves shall be
marked with permanent monuments. A permanent monument shall be deemed
to be concrete with rod center at least thirty (30) inches long with
a minimum dimension of four (4) inches extending below the frost line.
Should conditions prohibit the placing of monuments on the line, offset
marking will be permitted; provided, however, that exact offset courses
and distances are shown on the subdivision plat. Iron pipes or steel
rods shall be set at all lot corners.
