A. 
The following land subdivision principles and standards will be applied by the Borough Planning Commission and the Borough Council in evaluating plans for proposed subdivisions.
B. 
The standards outlined herein shall be considered minimum standards for the promotion of the public health, safety, morals and general welfare.
C. 
Where literal compliance with the standards herein specified is clearly impractical, the Borough Council may modify or adjust the standards to permit reasonable utilization of property while securing substantial conformance with the objectives of these regulations.
Land subject to hazards to life, health or property, such as quarry land, open ditches, etc., shall not be subdivided for residential purposes until all such hazards have been eliminated or unless adequate safeguards are provided by the subdivision plan.
A. 
Proposed streets shall be properly related to such street plans or parts thereof as have been officially prepared and adopted by the borough.
B. 
Proposed streets shall conform to such borough, county and state road and highway plans as have been prepared, adopted and/or filed as prescribed by law.
C. 
Streets shall be logically related to the topography so as to produce usable lots and reasonable grades.
D. 
Minor streets shall be laid out as to discourage through traffic, but provisions for street connections into and from adjacent areas will generally be required.
E. 
If lots resulting from original subdivision are large enough to permit resubdivision or if a portion of the tract is not subdivided, adequate street rights-of-way to permit further subdivision shall be provided as necessary.
F. 
Where a subdivision abuts or contains an existing or proposed major street, the Borough Council may require marginal access streets, rear service alleys, reverse frontage lots or such other treatment as will provide protection for abutting properties, reduction in the number of intersections with the major streets and separation of local and through traffic.
G. 
New half or partial streets will not be permitted except where essential to reasonable subdivision of a tract in conformance with the other requirements and standards of these regulations and where, in addition, satisfactory assurance for dedication of the remaining part of the street can be secured.
H. 
Wherever a tract to be subdivided borders an existing half or partial street, the other part of the street shall be plotted within such tract.
I. 
Dead-end streets shall be prohibited except as stubs to permit future street extension into adjoining tracts or when designed as culs-de-sac.
J. 
New reserve strips, including those controlling access to streets, shall be avoided.
A. 
Dead-end streets are prohibited unless designed as permanent cul-de-sac streets or when designed as temporary culs-de-sac for future access to adjoining properties.
B. 
Any street dead-end for access to an adjoining property or because of authorized stage development shall be provided with a temporary, all-weather turnaround within the subdivision, and the use of such turnaround shall be guaranteed to the public until such time as the street is extended. Right-of-way shall be extended to the tract boundary in such cases.
C. 
Cul-de-sac streets, permanently designed as such, shall not exceed 1,000 feet in length and shall not furnish access to more than 20 dwelling units.
D. 
Cul-de-sac streets, permanently designed as such, shall have a minimum length of 250 feet.
E. 
All cul-de-sac streets, whether permanently or temporarily designed as such, shall be provided at the closed end with a fully paved turnaround.
F. 
The minimum radius to the pavement edge or curbline shall be 40 feet, and the minimum radius of the right-of-way line shall be 50 feet.
G. 
Drainage of cul-de-sac streets shall preferably be toward the open end.
H. 
The center-line grade on a cul-de-sac street shall not exceed 10%, and the grade of the diameter of the turnaround shall not exceed 5%.
I. 
There shall be a maximum of four lots containing any access along the turnaround portion of a cul-de-sac street measured from reverse curve to reverse curve.
J. 
Whenever a future extension is found to be practical by the Council and Planning Commission, a fifty-foot-wide easement with an offer of dedication shall extend to the property line.
A. 
Minimum street right-of-way and cartway (roadway) widths shall be as follows:
(1) 
Minor street and marginal access street: fifty-foot right-of-way and twenty-eight-foot paved cartway.
(2) 
Collector street: sixty-foot right-of-way and thirty-six-foot paved cartway.
(3) 
Arterial traffic street: eighty-foot right-of-way and cartway generally as prescribed by Pennsylvania State Highway Department standards.
B. 
Additional right-of-way and cartway widths may be required by the Borough Council for the following purposes:
(1) 
To promote public safety and convenience.
(2) 
To provide parking space in commercial districts and in areas of high-density residential development.
C. 
Short extension of existing streets with lesser right-of-way and/or cartway widths than prescribed by Subsection A above may be permitted; provided, however, that no section of new right-of-way less than 40 feet in width shall be permitted.
D. 
Where a subdivision abuts or contains an existing street of inadequate right-of-way width, additional right-of-way width in conformance with the above standards shall be required.
A. 
Whenever street lines are deflected in excess of 5°, connection shall be made by horizontal curves.
B. 
To ensure adequate sight distance, minimum center-line radii for horizontal curves shall be as follows:
(1) 
Minor streets: 150 feet.
(2) 
Collector streets: 300 feet.
(3) 
Arterial traffic streets: 500 feet.
C. 
Except on minor streets, a tangent shall be required between curves.
A. 
Center-line grades should, whenever possible, be not less than 1%.
B. 
Center-line grades shall, whenever feasible, not exceed the following:
(1) 
Minor street: 10%.
(2) 
Collector and arterial traffic street: 6%.
C. 
Vertical curves shall be used at changes of grade exceeding 1% and shall be designed in relation to the extent of the grade change and to provide the following minimum sight distance:
(1) 
Minor street: 175 feet.
(2) 
Collector street: 300 feet.
(3) 
Arterial traffic street: 400 feet.
D. 
Where the grade of any street at the approach to an intersection exceeds 7%, a level area shall be provided having not greater than four-percent grades for a distance of 25 feet measured from the nearest right-of-way line of the intersecting street.
A. 
Right angle intersections shall be used whenever practicable, especially when minor local streets empty into collector or arterial streets. There shall be no intersection angle of less than 60° or more than 120° measured at the center line.
B. 
No more than two streets shall cross at the same point.
C. 
To the fullest extent possible, intersections with collector and arterial streets shall be located not less than 1,000 feet apart, measured from center line to center line. Exceptions shall be those cases deemed by the Council to require close spacing without endangering the public's safety.
D. 
Streets entering from opposite sides of another street shall either be directly across from each other or offset by at least 150 feet on local and collector and 300 feet on arterial streets, measured from center line to center line.
E. 
Street curb intersections shall be rounded by a tangential arc with a minimum radius of:
(1) 
Twenty-five feet for intersections involving only minor local streets;
(2) 
Thirty feet for all intersections involving a collector street or internal street used for industry; and
(3) 
Forty feet for all intersections involving an arterial street.
(4) 
Street right-of-way lines shall be parallel to (concentric with) curb arcs of intersections.
F. 
Clear sight triangles shall be provided at all public street intersections. Within such triangles, no vision obstructing object shall be permitted which obscures vision above the height of 30 inches and below 10 feet measured from the center-line grade of intersecting public streets.
(1) 
Such triangles shall be established from a distance of 75 feet from the point of intersection of the center lines, except that clear sight triangles shall be provided for all intersections with collector and arterial streets in accordance with PennDOT standards.
(2) 
Where an intersection is controlled by a stop sign or traffic signal, the site triangle shall be measured from a point in the center of the controlled or lesser street 25 feet back from the curbline of the uncontrolled or through street to the distance required above.
G. 
Whenever a subdivision abuts or contains an existing or proposed street with an ultimate right-of-way of 60 feet or more, the Borough Planning Commission may require restriction of access to the arterial street by:
(1) 
Provision of reverse frontage lots;
(2) 
Provision of service streets along the rear of the abutting lots, together with prohibition of private driveways intersecting the arterial streets; or
(3) 
Provision of marginal access streets, provided that the reserve strips establishing such marginal access streets shall be definitely placed within the jurisdiction of the borough under an agreement meeting the approval of the borough.
H. 
Except as specified above, reserve strips shall be prohibited.
A. 
Surface water runoff control measures included in the sedimentation and erosion control plan shall be designed to restrict peak flow of stormwater runoff from the property during and after development to the same volume as existed prior to development, based upon calculations for a storm of one-hundred-year frequency, by use of methods to withhold, disperse and release at a controlled rate for staged discharge all runoff over and above that which would have occurred from the land prior to development. Analysis shall be made for two-year, twenty-five-year and one-hundred-year storms. The method of calculation shall be based upon USDA Soil Conservation Service Technical Release No. 55 for drainage areas equal to or in excess of 20 acres and the Rationale method for drainage areas less than 20 acres.
B. 
Whereas the Borough Engineer has determined that storm sewers and culverts are required, installations shall be provided to:
(1) 
Permit unimpeded flow of natural watercourses.
(2) 
Ensure adequate drainage of all low points along the line of the street.
(3) 
Intercept stormwater runoff along streets at intervals related to the extent and grade of the area drained.
C. 
Where existing storm sewers are reasonably accessible, proposed subdivisions shall be required to connect therewith.
D. 
In the design of storm drainage facilities, special consideration shall be given to avoidance of problems which may arise from the concentration of stormwater runoff and to the solution of existing problems. The concentration of stormwater runoff onto adjacent properties shall be prohibited.
E. 
Storm drainage facilities shall be designed to meet the following criteria:
(1) 
Stormwater piping and inlet systems shall be designed for a storm of twenty-five-year frequency.
(2) 
Culverts across roadways for a storm of fifty-year frequency.
(3) 
Stormwater control measures as prescribed in Subsection A hereof, open watercourses and swales, as well as drainage systems servicing low points of roadways, for a one-hundred-year storm.
F. 
Where a subdivision or development is traversed by a watercourse, drainageway, channel or stream, there shall be provided a drainage easement conforming substantially with the high-water line of such watercourse attributable to a flood of one-hundred-year frequency, in order to preserve the unimpeded flow of natural drainage and to provide for future possible widening, deepening, relocating, improving or protecting of such drainage facilities. Any changes in the existing drainage shall be subject to the approval of the Borough Engineer and the Pennsylvania Department of Environmental Protection.
G. 
The developer shall employ available measures for control of erosion and sedimentation and shall meet as a minimum the standards and specifications of the USDA Soil Conservation Service as then adapted for use by the Delaware County Conservation District and the guidelines under Chapter 102 of the Pennsylvania Department of Environmental Protection.
H. 
In addition, the developer, as part of the Conservation Plan required under this chapter, shall submit data, including proposed dates where relevant, to indicate that the subdivision or development will be carried out in compliance with the following principles:
(1) 
The smallest practicable area of land should be exposed at any one time during development or construction.
(2) 
When land is exposed during development or construction, the exposure should be limited to the shortest practicable period of time.
(3) 
Temporary ditches, dikes, vegetation and/or mulching should be used to protect critical areas exposed during development or construction.
(4) 
Sediment basins (debris basins, desilting basins or silt traps) should be installed and maintained to remove sediment from runoff waters from land undergoing development.
(5) 
Provisions should be made to accommodate effectively the increased runoff caused by changed soil and surface conditions during and after development or construction.
(6) 
Permanent vegetation and erosion control structures should be installed as soon as practicable during construction activities.
(7) 
Wherever feasible, natural vegetation should be retained and protected and natural grade alterations kept to a minimum.
I. 
Wetlands are an important feature of stormwater management and the environment, and as such, the disturbance of any wetlands is subject to approval by the Commonwealth of Pennsylvania Department of Environmental Protection under Chapter 105 as well as the provisions of Section 404 of the Clean Water Act falling under the jurisdiction of the Army Corps of Engineers.
A. 
General block design standards. The length, width and shape of blocks shall be determined with due regard to the following provisions:
(1) 
Adequate and safe sites for buildings of the type proposed.
(2) 
Compliance with zoning requirements.
(3) 
Compatibility with topography.
(4) 
Safe and convenient vehicular and pedestrian circulation, including the reduction of intersections with major streets.
B. 
Block length.
(1) 
Blocks shall have a minimum length of 500 feet.
(2) 
In the design of blocks longer than 1,000 feet, special consideration shall be given to the requirements of satisfactory access for fire protection.
(3) 
Where practicable, blocks along arterial and collector streets shall not be less than 1,000 feet long.
C. 
Block depth. Residential blocks shall be of sufficient depth to accommodate two tiers of lots, except where reverse frontage lots are required along a major traffic street or where prevented by the size, topographical conditions or other inherent conditions of property, in which case the Borough Planning Commission may approve a single tier of lots.
D. 
Commercial and industrial blocks. Blocks in commercial and industrial areas may vary from the elements of design detailed above if required by the nature of the use. In all cases, however, adequate provision shall be made for off-street parking and loading areas as well as for traffic circulation and parking for employees and customers.
E. 
Crosswalks.
(1) 
Crosswalks may be required wherever necessary to facilitate pedestrian circulation and to give access to community facilities as well as in blocks of over 1,000 feet in length.
(2) 
Such crosswalks shall have a width of not less than 10 feet and a paved walk of not less than four feet.
A. 
Lot dimensions and areas shall be not less than specified by provisions of the Aldan Borough Zoning Ordinance.[1]
[1]
Editor's Note: See Ch. 256, Zoning.
B. 
The minimum building setback line shall be controlled by the provisions of the Aldan Borough Zoning Ordinance, as amended from time to time.
C. 
Side lot lines shall be substantially at right angles or radial to street lines.
D. 
Residential lots shall, in general, front on a municipal street, existing or proposed.
A. 
Alleys are prohibited in developments of single-family detached residences.
B. 
Private driveways shall have such grades to furnish safe and convenient parking spaces and shall be located not less than:
(1) 
Forty feet from the intersecting corner if the intersecting street is a minor street.
(2) 
Fifty feet from the intersecting corner if the intersecting street is a collector street.
(3) 
Seventy feet from the intersecting corner if the intersecting street is a major street.
C. 
Easements with a minimum width of 20 feet shall be provided as necessary for utilities; twenty-five-foot minimum easement width for storm drainage easements.
D. 
To the fullest extent possible, easements shall be centered on or adjacent to rear or side lot lines.
E. 
Where a subdivision is traversed by a watercourse, there shall be provided a drainage easement or right-of-way conforming substantially with the line of such watercourse and of such width as will be adequate to preserve natural drainage and provide sufficient width for maintenance.
All streets, public or private, shall be paved in accordance with this section or as otherwise specified by the borough regulations and when all required improvements have been properly installed as per the Borough Engineer. All streets shall be provided with concrete curb. All sidewalks shall be a minimum of four feet width and four inches depth, six inches depth for driveway aprons (3,500 P.S.I. air entrained).
A. 
Subgrade. Wherever possible the subgrade shall be in cut or undisturbed subsoil. In no case shall the subgrade consist of filled or undisturbed topsoil or frozen soils. All deleterious material such as tree roots, leaves, branches, trash, stones exceeding six inches in diameter and miscellaneous construction debris shall be removed from the subgrade. Compaction shall be accomplished by sheep's-foot, smooth wheel or rubber-tired roller, at the discretion of the Borough Engineer. The subgrade shall be compacted tight and dry and shall not be soft and spongy when check rolled. Compaction of the subgrade shall extend the full width of the cartway, including the width to be occupied by shoulders where applicable. The required road crown shall be built into the shaped subgrade.
B. 
Screenings. Before placement of the base course, the subgrade shall be covered with a cushion course of dry limestone screenings meeting the requirements of PennDOT Publication 408, A, No. 10, fine material and having a minimum thickness of one inch after placement where directed by Borough Engineer. Compaction of the screenings layer is not required.
C. 
Base course. All collector and nonresidential streets shall have a compacted, crushed aggregate base course thickness of 10 inches. All other streets shall have a compacted, crushed aggregate base course thickness of eight inches unless otherwise directed by the Borough Engineer. Measurement of the base course thickness can be taken from the compacted subgrade prior to the placement of screenings, unless otherwise directed by the Borough Engineer. The base course shall consist of a stone and screenings application meeting with requirements of PennDOT Publication 408, latest edition. A vibratory roller shall be used for both the stone compaction and the filling of the voids with fines. Completion of the base course shall consist of brooming to expose 1/2 inch to 3/4 inch of the uppermost layer of stone over a minimum of 75% of the road surface. No large areas of solid screenings or loose stone areas shall be permitted. Alternate base course materials such as B.C.B.C. may be permitted with the approval of the Borough Council upon recommendation of the Borough Engineer.
D. 
Binder course. An ID-2 binder course with a minimum compacted thickness of 11/2 inches meeting the requirements of PennDOT Publication 408, latest edition, shall be applied over the base course. In no case shall the binder course be applied over a frozen, saturated or excessively dirt-laden base course.
E. 
Wearing course. After proper cleaning, repairing and preparation of the binder course as directed by the Borough Engineer, a tack coat may be applied to the binder course prior to placing the wearing course. The tack coat, if required, will consist of materials meeting the specifications of PennDOT Publication 408, Section 406, latest edition. The wearing course will consist of ID-2 material meeting the requirements of PennDOT Publication 408, latest edition, Section 420, and shall have a minimum compacted thickness of one inch.
F. 
Joint seal. After application of the wearing course, all curb, inlet, manhole, etc., joints shall be sealed with a PennDOT approved joint sealer applied to neat lines with a minimum width of six inches.
G. 
All borough streets shall have crown of 1/4 inch per foot sloping away from the center line unless otherwise directed by PennDOT or the Borough Engineer.
[1]
Editor's Note: See also Ch. 213, Streets and Sidewalks.
A. 
Curbs shall be required on all streets and shall be of the vertical type. Rolled curb-and-gutter type may be installed only upon the approval of the Borough Council, except that rolled curbs shall not be used on streets whose grade exceeds 6% or on any collector or arterial streets. The transition from one type of curb to another shall be made only at a street intersection, and adequate provision shall be made for driveway entrances.
B. 
All curbs shall be constructed of Class A cement concrete as specified by PennDot Publication 408, latest edition. Curbs shall be constructed to the dimensions seven inches by eight inches by 18 inches with a seven-inch reveal.
C. 
Curbing shall be constructed in ten-foot lengths. A premolded bituminous impregnated one-half-inch expansion joint shall be placed between sections of curbing at intervals of not more than 30 feet and as directed by Borough Engineer.
D. 
Depressed curbs at driveways shall be between 11/2 inches above the finished street surface. Pipes, grates, wood planks or other materials shall not be placed in the gutter to form a driveway ramp.
E. 
Where it is necessary to replace existing vertical curbs with depressed curbing, two ten-foot-long sections of existing curb shall be removed down to the subgrade without disturbing the adjacent cartway paving. The depressed curb shall then be formed and poured in place according to the dimensions seven inches by eight inches by 18 inches. Any portions of the cartway disturbed during curbing removal or installation will be repaired to new condition.
F. 
When curbing must be cut for depressed curb installation, the length of the remaining section shall be no less than four feet between expansion joints and the cut shall be made in a neat manner with a power saw equipped with a proper masonry cutting blade.
G. 
Any depressed curb sections that are unused when a development or phase of a development is completed shall be completely removed and replaced with full section upright curbing to line and grade of adjacent curbing. Forming and pouring vertical curbing on top of an existing curb depression shall not be permitted.
A. 
Monument standards.
(1) 
Permanent stone or concrete monuments shall be accurately placed at the intersection of all lines forming angles and at changes in directions of lines in the boundary (perimeter) of the property being subdivided.
(2) 
All monuments shall be placed by a registered engineer or surveyor so that the scored point created by an indented cross or drill hole in the top of the monument shall coincide exactly with the point of intersection of the lines being monumented.
(3) 
Monuments shall be set with their top level with the finished grade of the surrounding ground.
(4) 
All streets shall be monumented on the right-of-way line at the following locations:
(a) 
At least one monument at each intersection;
(b) 
At changes in direction of street lines;
(c) 
At each end of each curved street line, e.g., points of curvature and tangency (only one side of each street need be monumented);
(d) 
An intermediate monument wherever topographical or other conditions make it impossible to sight between two otherwise required monuments; and
(e) 
At such other places along the line of streets as may be determined by the Borough Engineer to be necessary so that any street may be readily defined in the future.
B. 
Marker standards.
(1) 
Markers shall be accurately placed at all lot corners within a subdivision.
(2) 
Markers shall consist of iron pipe or pins, with a minimum diameter of 1/2 inch and shall have a minimum length of 18 inches.
(3) 
Markers shall be driven level with finished grade.
A. 
Proposed streets which are obviously in alignment with those already existing and named shall bear the names of the existing streets.
B. 
In no case shall the name of a proposed street duplicate an existing street name in the borough and in the postal district, irrespective of the use of the suffix street, road, avenue, boulevard, driveway, place, court, lane, etc.
C. 
All street names shall be subject to the approval of the Borough Council.
D. 
Street name signs as well as all regulatory and warning signs shall be installed at all street intersections and where necessary. The design and placement of such signs shall be subject to approval by the borough.
A. 
Deceleration or turning lanes may be required by the borough along existing and proposed streets whenever the Council determines such lanes are required to meet reasonable safety needs, as determined by a traffic impact study, § 220-43 of this chapter.
B. 
Deceleration lanes shall be designed to the following standards:
(1) 
The lane shall have a minimum width of 12 feet or, in the case of intersections with state highways, such width as is required by the applicable regulations and standards of PennDOT.
(2) 
The lane shall provide the full required lane width for the entire length which shall be measured from the center line of the intersecting road. In addition, there shall be a seventy-five-foot taper provided at the beginning of the lane so that traffic can leave the main traveled lane smoothly.
(3) 
The minimum lane length shall be as follows:
Design Speed
of Road
(mph)
Minimum Deceleration
Lane Length
(feet)
30
165
40
275
50
300
C. 
Acceleration lanes are required only when the need is indicated by a traffic impact study. The design shall be as per the recommendation of the Borough Engineer. As necessary, a paved taper shall be provided for right-hand turns.
A. 
The Council shall require a traffic impact study as part of the application for subdivision and land development under the following situations:
(1) 
Where the proposed project abuts or is within 1,000 feet of an existing hazardous condition documented by the borough, the Delaware County Planning Commission or PennDOT.
(2) 
A single-family development proposal in which a single access will serve 50 or more units, or 80 or more units when served by multiple accesses.
(3) 
A multiple family proposal in which a single access will serve 75 or more units, or 100 or more units when served by multiple accesses.
(4) 
Any proposal which will generate a potential of 1,000 trips per day based on the standards of the Institute of Traffic Engineers.
(5) 
A project that has potential for increasing existing average daily trips (ADT's) by more than 10%.
B. 
Traffic impact studies shall be prepared in compliance with the Rules and Regulations for Traffic Study by PennDOT, Title 67, Code Chapter 610. The cost of said study shall be the responsibility of the applicant.
C. 
The traffic impact study shall be submitted by the applicant for review by the Borough Engineer. Said study shall meet with the satisfaction of the Council prior to plan approval.
D. 
The traffic impact study shall conclude with a list of required improvements, including their estimated cost, timing and who should be responsible for their installation, subject to review by the Borough Engineer.
A. 
Applicability. The standards established in this section are designed to prevent dangerous or objectionable hazards or conditions which would be adverse to the health, safety and welfare of the residents of Aldan Borough. These standards shall apply to all uses, conforming or nonconforming, within all districts of the borough.
B. 
Lighting.
(1) 
Lighting shall be sufficient for the intended use and of satisfactory design, construction and location. All lighting incident to the uses in the various zoning districts shall be subject to the recommendation of the Planning Commission.
(2) 
All lighting shall be effectively shielded and shall be arranged so as to protect street and neighboring properties from direct glare or light radiation which may cause a safety problem or nuisance. Authority for determination shall rest with the borough.
(3) 
Design. Lighting facilities shall provide a minimum illumination level within the following range of values:
(a) 
Pedestrian walkways: 0.2 to 0.4 footcandles.
(b) 
Multiple-family common areas: 0.6 to 0.8 footcandles.
(c) 
Illuminated signs: 0.6 to 0.2 footcandles.
(d) 
Recreational/industrial activity: 1.0 to 1.2 footcandles.
(e) 
Industrial parking lots: 1.0 to 1.2 footcandles.
(f) 
Commercial parking lots: 1.0 to 1.5 footcandles.
(4) 
Freestanding light standards shall not exceed 15 feet in height. However, the Planning Commission may recommend light standards in excess of 15 feet upon the following considerations: glare to offset properties, glare for vehicular traffic, effect on adjacent property owners, effect on off-site uses and any other adverse effects which the Planning Commission deems appropriate.
(5) 
Sign lighting shall be arranged so that the source of light is not visible from any point off the lot and that only the sign is directly illuminated.
(6) 
The borough shall require that streetlighting be provided. Said streetlighting shall be designed per the standards of the I.E.S. and approved by the Borough Engineer. (Note: Where possible, short post lighting should be incorporated to reduce glare. Any divergence from the above quantities shall still remain within the limits of the standards of the I.E.S. In no case shall illumination exceed 1.0 footcandle measured at the property lines. This shall apply in all zoning districts.)
Wherever the site is not naturally wooded, the subdivider shall be required to plant street trees of not less than 21/2 inches caliper, as measured six inches above the ground within the right-of-way and at not more than 50 feet apart, as measured along each side of the street and at a minimum of six feet from the curb. For the purpose of these regulations, street trees are limited to the following unless prior permission of the Council is obtained: Moraine honey locust, littleleaf European linden, pin oak, London plane-tree, red oak, columnar-type maples, sugar maple, Norway maple and sweetgum, subject to the approval of the Aldan Shade Tree Commission.
A. 
Sidewalks shall be required by the Council for protection of the public wherever it is determined, at the sole discretion of the Council, that the potential volume of pedestrian traffic or other considerations of public safety require sidewalks. The need for sidewalks should be especially considered where curbing provisions are to be met.
B. 
Sidewalks shall be provided where streets of a proposed subdivision are extensions of existing streets having sidewalks on one or both sides.
C. 
In circumstances where sidewalks are required, they shall be constructed on both sides of the streets, except that the Council of Aldan may authorize sidewalks on one side only of U-shaped streets, culs-de-sac or where character of use, in the opinion of the Council upon the advice of the Borough Engineer, does not require pedestrian access on both sides of the street.
D. 
The minimum width for sidewalks shall be four feet. The Council may require a greater width in the vicinity of shopping centers, schools and recreation facilities or where similar intensive urban uses exist.
E. 
Sidewalks, where provided, shall be within the right-of-way and in residential areas, where conditions permit, three feet from the face of the curb. Sidewalks should line up with adequate walks in adjoining subdivisions.
F. 
Sidewalks shall be of portland cement concrete, a minimum 3,500 PSI four inches thick, six inches at driveways with reinforcement at driveway crossings and a minimum transverse slope of 2% from property line to curb to facilitate drainage.
G. 
All phases of construction (subgrade, concrete, forms, grade and thickness) shall be in accordance with the requirements of this section. The forms shall be inspected prior to pouring, and finished walks shall be inspected by the Borough Engineer or Building Inspector.