A. Storm and Surface Water Runoff:
1. Storm Drains: An adequate system of storm water drainage designed for a 10-year return frequency rain shall be constructed and installed, consisting of pipes, tiles, manholes, inlets and other necessary facilities that will adequately drain the subdivision and protect roadway pavements and will prevent the accumulation of storm water at any place under normal conditions. Open ditches shall be prohibited in all residential areas. Back yard swales are permitted in residential areas subject to the following regulations:
a. Maximum and minimum slopes and general design criteria of the Federal Housing Administration's "Minimum Property Requirements" will be acceptable except as herein modified.
b. No continuous swale shall have a length exceeding six hundred feet (600').
c. Minimum grade of the flow line shall be one percent (1%).
d. At no point in the swale shall the flow line be more than three feet (3') below the finished grade of the topsoil at the foundation of the house opposite the swale.
e. No change in alignment of a back yard swale shall exceed forty five degrees (45o). (See following page for diagram.)
2. Open Ditches: Open ditches are allowed for rear yard drainage in the industrial and commercial areas if they conform to the following regulations:
a. The bottom of the ditch shall be lined with a five inch (5") thick concrete invert minimum of three feet (3'0") wide. Two (2) number 6 reinforcing rods are to be equally spaced for the entire length of the invert.
TIME OF CONCENTRATION FOR OVERLAND FLOW
SOURCE, DEPARTMENT OF THE ARMY, TECHNICAL MANUAL, TM5-820-1.
RAINFALL INTENSITY DATA
DATA SOURCE: U.S. WEATHER BUREAY TECHNICAL PAPER NO. 40
b. The grade of the invert shall be designed to provide a velocity of flow between three feet (3') and five feet (5') per second.
c. The sides of the ditch shall not exceed a two to 1 (2:1) slope.
d. All side slopes shall be sodded from the invert to the top of the slope.
e. Any alignment change shall require concrete slope protection on the side slopes of the ditch.
B. Storm Water Detention:
1. The following shall govern the design of any improvement with respect to the drainage and detention of storm water runoff:
a. Streets, blocks, depths of lots, parks and other public grounds shall be located and laid out in much a manner as to preserve and utilize natural streams, channels and detention basins including, wherever possible, the larger streams and flood plains within parks or other public grounds.
b. Storm water from a 100-year return frequency storm must be stored and/or transported from any development in such a manner that no damage results from flooding.
c. A combination of storage and controlled release of storm water runoff is required for all nonresidential developments, regardless of size, and for residential developments exceeding five (5) acres in area.
d. The release rate of storm water from all developments requiring detention shall not exceed the storm water runoff rate from the area in its natural undeveloped state.
Because of the flat conditions of the land in this are, channel configurations cut by nature are generally unable to handle the runoff from high intensity rainfalls and results in flood plain storage or spreading of runoff over the land areas during the larger storm periods. In order not to increase the runoff from such areas after development, the release rate must be limited to the carrying capacity of these natural channels.
A release rate of not greater than that calculated from a storm of 3-year frequency with a runoff rate coefficient of fifteen one-hundredths (0.15) shall be used, unless the applicant can show, by detailed calculations which are acceptable to the Director of Engineering and Community Development, that the discharge rate of the natural outlet channel serving the area is greater.
e. Drainage systems shall have adequate capacity to bypass through the development the flow from all upstream areas for a storm of design frequency assuming that the land is in a fully developed state under present zoning or zoning proposed under a Comprehensive Plan. The bypass flow rate shall be computed utilizing a runoff coefficient of not less than 0.35. An allowance will be made for upstream detention when such upstream detention and release rate has approved by the Director of Engineering and Community Development and that evidence of its construction can be shown.
f. The live detention storage to be provided will be calculated on the basis of the 100-year frequency rainfall as published by the U.S. Weather Bureau for this area. The detention volume required will be that necessary to handle the runoff of a 100-year rainfall, for any and all durations, from the fully developed drainage area tributary to the reservoir, less that volume discharged during the same duration at the approved release rate.
g. Sharply meandering streams or channels may be partly straightened and minor changes made in other channels, subject to approval of the Director of Engineering and Community Development; provided the floodway dimensions of the stream or channel are maintained, and the volume of flood water storage outside the floodway is not reduced.
h. The smaller uppermost reaches of drainage channels and swales forming the natural drainage system near the watershed divide may be relocated or eliminated and incorporated into the planned system of storm sewers upon a showing that the system is adequate and can safely handle the flood water runoff following the heavier rain storms.
i. Storm sewer outfalls shall be so designed, by reason of elevation of the invert, pumping or otherwise, that, when the receiving stream is in full flood, the storm sewer will continue to drain the area it is designed to serve at a uniform rate.
j. Cross-sections and grades of streets designed as channels shall be designed to temporarily store and convey the overflow from storm sewers and over-the-curb runoff and be provided with adequate outlets for safe disposal of such overflow. The street cross-section shall provide a lot grade for the finished floor of each adjoining building at least two feet (2') higher than the crown of the pavement, and the minimum sill elevation of openings in the outer walls of such buildings shall be at least two and one-half feet (2.5') above the crown elevation.
k. The crown of street pavements hereafter built adjoining or near streams, flood water runoff channels or detention basins shall be not lower than the established high-water elevation plus two feet (2'), in the case of major streets, and plus one foot (1') in a 100-year frequency storm.
l. Waterway openings of bridges and culverts hereafter built over streams of flood water runoff channels shall be designed with a waterway opening large enough to handle the flow from a 100-year frequency storm.
m. Construction, filling or other similar physical occupation of the flood plain as defined by the Department of the Interior United States Geological Survey, which is otherwise prohibited by this subsection, may be permitted if adequate compensatory storage volume is provided. This shall be accomplished by developing in the existing flood plain excavated space below the high-water elevation in an amount equal to the flood storage capacity preempted by the proposed construction. In the case of streams and channels, such excavation shall be made opposite or immediately upstream from the area to be filled. It shall be the duty of the property owner to conduct such excavation in a manner consistent with the other provisions of this subsection and may be done only after the approval by the Director of Engineering and Community Development has been granted. Approval of the Director of Engineering and Community Development will be contingent upon the property owner's ability to demonstrate that the compensatory storage will be adequate and satisfactory for its intended purpose.
2. Drainage Plan: A comprehensive drainage plan must be submitted to the Director of Engineering and Community Development which incorporates the aforementioned rules and shall provide or be accompanied by maps or other descriptive material showing the following:
a. The extent and area of each watershed tributary to the drainage channels in the subdivision.
b. The street storm sewers and other storm drains to be built, the basis of their design, the outfall and outlet locations and elevations, receiving stream or channel and its high-water elevation and the functioning of the drains during high-water conditions.
c. The parts of the proposed street system where pavements are planned to be depressed sufficiently to convey or temporarily store overflow from storm sewers and over-the-curb runoff resulting from the heavier rain storms and the outlets for such overflow.
d. Existing streams and flood water runoff channels to be maintained, enlarged, altered otherwise and eliminated and new channels to be constructed, their locations, cross-sections and profiles.
e. Existing culverts and bridges, drainage areas, elevation and adequacy of waterway openings and new culverts and bridges to be built, their materials, elevations, waterway openings and basis of design.
f. Existing detention ponds and basins to be maintained, enlarged, altered otherwise and new ponds or basins to be built with dams and their design.
3. Construction Requirements for Detention Ponds:
a. Detention Ponds Containing Permanent Water:
(1) Detention reservoirs containing permanent lakes must have a water area of at least one-half (1/2) acre and a minimum depth of approximately ten feet (10') over at least twenty five percent (25%) of the total area. The remaining lake area must have an average depth of at least five feet (5') and should have no extensive shallow areas.
(2) In excavated lakes, the underwater side slopes in the lakes must be stable. In the case of valley storage, natural slopes may be considered to be stable.
(3) A safety ledge four feet (4') to six feet (6') in width is required and must be installed in all lakes approximately thirty inches (30") to thirty six inches (36") below the permanent water level. In addition, a ledge twelve inches (12") to eighteen inches (18") above the permanent water line must be provided. The slope between the two (2) ledges must be stable and of a material which will prevent erosion due to wave action such as stone or rip rap.
(4) A safety ramp exit from the lake is required in all cases and should have a minimum width of twenty feet (20') and exit slope of six horizontal to one vertical (6:1). The ramp must be of a material that will prevent its deterioration due to vehicle use and/or wave action.
(5) Periodic maintenance is required in lakes to control weed and larval growth. The reservoir must also be designed to provide for the easy removal of sediment which will accumulate in the lake during periods of reservoir operation. A means of maintaining the designed water level of the lake during prolonged periods of dry weather is also required. One suggested method is to have a water hydrant near the pond site.
b. Detention Ponds Containing Permanent Water and Dry Detention Ponds:
(1) All excavated spoils must be spread so as to provide for aesthetic and recreational features such as sledding hills, sport fields, etc. Slopes of six horizontal to one vertical (6:1) are required except where recreation uses call for steeper slopes. Even these features must have a slope no greater than three horizontal to one vertical (3:1) for safety, minimal erosion, stability and ease of maintenance.
(2) Safety screens must be provided for any pipe or opening to prevent children or large animals from crawling into the structures. A maximum opening of six inches (6") is required.
(3) In valley storage reservoirs, an emergency spillway or other provision must be provided to allow for bypassing flood flows during periods when the design capacity of the reservoir and outlet has been exceeded. This spillway must be of such a design that its operation is automatic and does not require manual attention.
(4) Sod or other suitable vegetative cover as approved by the Director of Engineering and Community Development must be provided throughout the entire reservoir area.
(5) Debris and trash removal and other necessary maintenance must be performed after each storm to assure continued operation in conformance to the design.
c. Dry Detention Ponds:
(1) Dry detention ponds must have an underdrain system to minimize the wetness of the bottom so that water does not remain standing in the bottom thereby harboring insects and limiting the potential use of the reservoir. The underdrain system could empty by gravity into the wet well of a pump station or to the receiving stream directly.
(2) The dry detention pond must be designed to serve multi-purpose functions. Recreational facilities, aesthetic qualities, etc., as well as flood water storage must be considered in planning the reservoir.
4. Responsibility for Maintenance of Detention Ponds:
a. The responsibility for maintenance during construction and thereafter shall be the responsibility of the land developer/owner.
b. Storm water detention and retention basins may be donated to the Village or other unit of government designated by the Village for ownership and permanent maintenance, providing:
(1) The facility has been designed and constructed according to Village requirements enumerated above;
(2) All improvements have been constructed, approved and accepted by the Village for the land area served by the drainage basin;
(3) Detention ponds containing permanent water are located within a tract of land consisting of fifteen (15) acres or more, of which thirty percent (30%) of the area is above the high-water line, and includes a body of water of ten (10) surface acres or more, of which fifty percent (50%) is to have a minimum depth of ten feet (10'); four inch (4") size rip rap to be provided three feet (3') below and three feet (3') above normal water line; all slopes between the rip rap and high-water line are to be sodded and the remaining land area is to be hydroseeded; are equipped with electrically-driven aeration devices to maintain proper aerobic conditions to sustain aquatic life; have a four foot (4') wide crushed limestone walkway at the high water line entirely around the body of water; are situated to permit public access two hundred feet (200') wide and not less than two hundred feet (200') to the high-water line; and providing further, that the high-water line is not closer than thirty five feet (35') to any property line.
(4) Dry detention ponds are located on a tract of land consisting of two (2) acres or more of land, including a minimum bottom area of two hundred seventy five feet by two hundred seventy five feet (275'x 275') or two hundred feet by three hundred seventy five feet (200'x 375'); maximum side slopes of five to one (5:1); all slopes are to be sodded to the high-water line; the bottom of the basin and areas above the high-water line are to be hydroseeded; and providing further, that the high-water line is not closer than thirty five feet (35') to any property line.
C. Sanitary Sewers:
1. Public Sewers: A complete system of sanitary sewers shall be constructed throughout the entire subdivision in such a manner as to render the same accessible to every lot. Said sanitary sewers shall be designed and constructed to meet the standards of the Metropolitan Sanitary District of Greater Chicago, including inflow and infiltration criteria, entitled "Manual of Procedures for the Administration of the Sewer Permit Ordinance as adopted on September 3, 1970, and revised March 13, 1986", which is hereby adopted and incorporated by reference herewith as Exhibit A.
2. Private Sewage Disposal: If no sewer outlet is available to said subdivision, application for the use of a private sewer system may be made to the Mayor and Board of Trustees. Upon an affirmative vote of the majority of the Village Board, a private sewer system comprising septic tanks and tile seepage fields may be used; provided, however, that they shall conform with the following conditions:
a. Septic tanks and tile fields shall not be permitted on any lot less than twenty thousand (20,000) square feet in area.
b. A seepage test shall be made for each acre of ground to be subdivided and shall show the area to be suitable for septic tanks and tile fields. Seepage tests shall be made in accordance with Book No. One of Cook County Department of Health as revised to date, and a written report of such tests made by a registered professional engineer shall be submitted with the final plat.
c. All private sewage disposal systems, seepage systems and septic tanks shall be constructed and operated in accordance with the specifications set forth in said Book No. One.
d. If, after septic tanks shall be utilized in any subdivision, a sewer system is installed so that the same is available to the subdivision and the lots therein, it shall thereafter be unlawful to utilize septic tanks for the disposal of sewage and all properties utilizing septic tanks shall discontinue their use and make connection to the sanitary sewer for disposal of sewage.
D. Water Supply:
1. Water Mains: When located within the service area of a public water supply system, water distribution mains of not less than eight inches (8") in diameter shall be constructed throughout all residentially zoned property and not less than twelve inches (12") in diameter in all industrially and commercially zoned property. All water transmission lines shall be twelve inches (12") or larger as required by the Director of Engineering and Community Development. All water mains shall be installed in such manner as to adequately serve all lots and tracts within and adjacent to the area for which the water supply system is to be constructed with connections to the existing public system. All water system improvements shall be subject to review and approval of the Director of Engineering and Community Development.
2. Cast-Iron Pipe Specifications: All pipe and fittings shall be capable of withstanding an internal working pressure of one hundred fifty (150) pounds per square inch for forty five (45) minutes. All pipe shall have a modified cement mortar lining conforming to American National Standards Institute (ANSI) - 4 and/or American WaterWorks Association (AWWA) 104. The pipe and fittings shall conform to ANSI 21.51 and/or AWWA C151, Class 2 (52) pipe. Three (3) copies of the aforementioned specifications are and have been available at the office of the Village Clerk in accordance with State law.
3. Fire Hydrants: Fire hydrants, as approved by the Director of Engineering and Community Development shall be installed throughout the entire water system so that there is a hydrant located at all street intersections and intermediate hydrants evenly spaced so the interval between hydrants is not more than three hundred feet (300'). All fire hydrants shall have an eight and one-half inch (81/2") barrel and shall be provided with two (2) two and one-half inch (21/2") hose connections and one four and one-half inch (41/2") steamer connection and shall be equipped with an individual auxiliary valve. The threads on the hose connection shall be national standard thread. Hydrants shall be set plumb with the center of the steamer connection set eighteen inches (18") above the finish grade. The base of the hydrant shall be set a minimum of eight inches (8") from the excavation level and be set on concrete blocks. There shall be a minimum of three-fourths (3/4) cubic yards of gravel with a minimum screen size of three-fourths inches (3/4") placed at and around the base of the hydrant to insure proper drainage. All hydrants shall be set within a minimum of two feet six inches (2'6") from back of curb to center of hydrant and a maximum setting of seven feet (7') from back of curb to the center of the hydrant.
All hydrants shall be individually flow-tested and meet the capacity indicated by the following table. Hydrants shall be painted to provide a high level of daytime visibility and nighttime reflectivity with the hydrant top and nozzle caps color coded in accordance with the following table:
Class | Flow Capacity | Color of tops and Nozzle Caps
|
A | 1,000 GPM or greater | Green |
B | 500-1,000 gpm | Orange |
C | Less than 500 GPM | Red |
4. Valves: Valves shall be installed at eight hundred feet (800') intervals and the system shall be designed and valves installed so that, with any one section shut down, the rest of the system will maintain an adequate water supply.
Main water line gate valve boxes, shut-off boxes and service boxes are to be located in the lawn area between curb line and sidewalk line where possible and installed at final finished lawn grade. Main gate valves installed in streets, roadways, driveways or sidewalks are to be installed in a standard forty eight inch (48") precast manhole in accordance with Village specifications; all valves and shut-off devices shall be protected from frost.
5. Customer Services: Customer water service lines shall be constructed to connect with the utility service mains located within any street or thoroughfare to serve each adjoining lot, tract or building site; such service lines shall extend from the main to a point beyond the outside curb lines of proposed roadway or street pavement and at least one foot (1') beyond the outside lines of proposed alley pavement.
All customer service lines shall be located at the approximate center line of each lot.
6. As-Built Engineering Drawings: Prior to donation of public improvements to the Village by the developer and upon completion of construction of all subdivision improvements such as streets, storm drainage and utility mains and lines, including water, sanitary sewer and storm sewer, the developer shall provide the Village with two (2) complete sets of as-built engineering drawings. The drawings shall include a complete bill of material of all the improvements.
E. Availability of Village-Owned Water and Sewer Facilities: The Village shall make its water and sewer facilities available to all real estate now or hereafter located therein and:
1. The property owner(s) shall pay connection charges as provided in title 7, chapter 2 of this code.
2. The property owner(s) shall provide water and sewer extension mains and water meters in accordance with the provisions of this code and as deemed necessary by the director of engineering and community development.
3. Subdividers and developers shall:
a. Construct and donate to the village all extension mains, water distribution systems, including transmission mains made necessary by such extension, water meters, meter installation materials, sewage collection systems, including interceptor sewers made necessary by said extensions of the sewage collection systems and lift stations, if any.
b. Construct same in accordance with this code relative thereto and in a manner satisfactory to the director of engineering and community development.
c. Pay all fees per acre designated at the time of annexation at the time the developer or owner(s) seeks a water connection.
4. That the village shall in all instances determine the appropriate sizing of mains and required capacity of proposed water and sewer facilities necessary to serve any proposed subdivision.
5. If the village desires to increase the size or capacity of any portion or all of the sanitary sewer or water system proposed by the subdivider or developer in order to provide service to areas not located with or beyond the limits of said subdivision, the cost thereof in excess of the cost of the subdivider's or developer's proposed installation shall be refunded by the village to the subdivider or developer on the following basis:
a. Prior to construction, the subdivider or developer and the village shall agree upon the location and acreage of the land which the excess capacity is designed to serve and shall agree on the total excess cost in dollars.
b. Any subdivider, developer or property owner(s) in the area, as established according to subsection E5a of this section, for which the said excess capacity has been provided, shall pay to the village the dollar cost of such excess capacity in the same proportion that the acreage of said subdivision, development or land bears to the total acreage for which the excess capacity was provided; whereupon, the village shall refund a like amount to the subdivider or developer providing said excess capacity.
6. All persons connecting directly to any village water and/or sewer main shall be assessed an inspection fee of twenty five dollars ($25.00) per connection.
F. Street Pavement Standards:
1. Generally:
a. All street pavements within the village shall be constructed in accordance with:
"Standard Specifications For Road And Bridge Construction", state of Illinois department of transportation October 1988, as amended from time to time.
"Manual For Structural Design Of Portland Cement Concrete Pavement", Illinois division of highways, revised November 1970.
"Manual Of Instructions For The Structural Design Of Bituminous Pavements On Projects Involving MFT And FAS Funds", Illinois division of highways, revised April 1969.
b. Design requirements for the pavement will be related to the zoning classification of the area adjacent to the subject street.
c. A street which divides areas with different zoning classifications shall be constructed in accordance with the requirements of the area requiring the higher quality pavement. Any variation of this must have prior approval of the director of engineering and community development.
d. Combination concrete curb and gutter is required on all streets.
e. At the request of the director of engineering and community development, a copy of all design assumptions and computations on which the posed design is based shall be submitted.
f. All pavement shall have a two percent (2%) cross slope.
g. Prior to the commencement of any street construction, the developer shall notify the director of engineering and community development at least twenty four (24) hours in advance as to the nature of the work being done.
2. Pavement Width: The minimum width of the pavement structure, back to back of curb, shall be as follows:
Type Of Street | Width | Zoning Classification Of Subject Area
|
Residential | 28 ft. | R-1, R-2, R-3, A-1, A-2 |
*Residential collector | 40 ft. | R-1, R-2, R-3, A-1, A-2 |
Light industrial | 40 ft. | M-1 |
Heavy industrial | 40 ft. | M-2 |
Business | 40 ft. | B-1, B-2 |
*A street primarily for through traffic with intersections at grade and direct access to abutting property and on which geometric design and traffic control measures are used to expedite the safe movement of traffic.
3. Pavement Design: All pavement shall be designed in accordance with the previously referenced standards and manuals of the Department of Transportation. The design thickness shall be dependent on the soil support value and the projected traffic factor.
a. Subgrade: All subgrade material shall have a minimum California bearing ratio (CBR) of three (3). Subgrade material having a CBR less than three (3) shall be removed and replaced with a suitable fill material or the pavement must be designed to compensate for the soil conditions. The soil support CBR values selected for use by the designer should represent a minimum value for the soil to be used.
b. Design Criteria: The development of the following minimum requirements are based on the assumption that all streets have two (2) traffic lanes. Any variation of this will require the approval of the Director of Engineering and Community Development.
(1) Bituminous Pavement: The design of all bituminous pavements shall be based on the minimum structural number for the type of street. The minimum structural numbers are as follows:
Type of Street | Structural Number | Zoning Classification of Subject Area
|
Residential | 3.00 | R-1, R-2, R-3, A-1, A-2 |
Residential | 3.50 | R-1, R-2, R-3, A-2 |
Collector | A-1 | |
Light Industrial and Business | 3.75 | M-1, B-1, B-2 |
Heavy Industrial | 4.50 | M-2 |
The following are coefficients to be used for approved pavement structure materials. The coefficients, when multiplied by the thickness of the materials, will yield the structural number.
STRUCTURE MATERIALS
| STRENGTH REQUIREMENTS
| COEFFICIENT
| ||
M.S. | I.B.R. | P.S.I.** | ||
STRUCTURE MATERIALS
| STRENGTH REQUIREMENTS
| COEFFICIENT
| ||
M.S. | I.B.R. | P.S.I.** | ||
Bituminous Surface: | ||||
Road Mix (Class B) | 0.20 | |||
Plant Mix (Class B) | ||||
Liquid Asphalt | 0.22 | |||
Asphalt Cement | 900 | 0.30 | ||
Class I | 1700 | 0.40 | ||
Base Coure: | ||||
Aggregate, Type B | ||||
Uncrushed | 50 | 0.10 | ||
Crushed (100%) | 80 | 0.13 | ||
Aggregate, Type A | 80 | 0.13 | ||
Waterbound Macadam | 110 | 0.14 | ||
Cement Aggregate | 650 | 0.23 | ||
Pozzolanic Base Course, Type A | 0.28 | |||
Bituminous Aggregate Mixture | 900-1900 | 0.24 - 0.33 | ||
Bituminous Mixture, Class I | 1700+ | 0.33 | ||
Portland Cement Concrete (new) | 2500+ | 0.50 | ||
*Marshall stability
**7-day design compressive strength
October 1 shall be the deadline for the installation of pozzolanic base material; other construction material can be used to November 1 if the weather allows. Any work done after November 1 shall require a written authorization from the Director of Engineering and Community Development. This authorization will in no way void the property owner's guarantee on the work done.
Minimum thickness of Bituminous Surface Course (compacted).
A minimum of three inches (3.0") surface course will be required on all pavements with a structural number of 3.0 to 3.99. Pavements with a structural number of 4.0 to 4.99 will require a four inch (4.0") surface.
(2) Concrete Pavement: The design of all concrete pavements shall be based on the minimum thickness for the type of street. The minimum thicknesses are as follows:
TYPE OF STREET | ZONING CLASSIFICATION OF SUBJECT AREA | MINIMUM THICKNESS
|
Residential | R-1, R-2, R-3, A-1, A-2 | 6.5 inches |
Residential Collector | R-1, R-2, R-3, A-1, A-2 | 7.0 inches |
Light Industrial and Business | M-1, B-1, B-2 | 7.5 inches |
Heavy Industrial | M-2 | 9.0 inches |
All concrete pavement shall be reinforced. The reinforcement must conform to the requirements set forth in the Standard Specifications for Road and Bridge Construction.
4. Third Lift Requirements: Third lift requirements for flexible street pavement; concrete streets and all streets installed after June 13, 1972, are excepted from this requirement.
a. All flexible streets to be installed subsequent to April 1, 1968, in areas either zoned I-1 or I-2 Industrial or B-1, B-2, or B-3 Business or adjacent thereto shall make provision for a third lift or addition of pavement to be added to said streets at such time as seventy five percent (75%) of the frontage bordering said streets have been improved with buildings or five (5) years from date of street construction, whichever event shall first occur. The third lift shall not be added until base failures, if any, in the street are corrected.
b. To insure said additional future pavement and base failure correction, the developer and owner of the land benefited by the improvement shall deposit with the Director of Finance at the time that the street improvement is installed the cost of a third lift in monies or such securities as the Village deems acceptable, the amount to be estimated by the Director of Engineering and Community Development, plus ten percent (10%) of the cost of the base to guarantee the necessary base restoration prior to installing third lift. Said money shall then be utilized by the Village within the time period specified for the purpose specified. The Village shall have the right to invest said deposits in U.S. government bonds or such other legal investment as they may determine proper. All interest earned shall be added to the principal deposited and may be used for any purpose for which the principal amount could have lawfully been used. Any monies not used shall be returned to the developer or his assigns at such time as the third lift is installed.
c. Prior to installation of the third lift, all areas of existing pavement, including base course that, in the opinion of the Director of Engineering and Community Development shall require repair, shall be repaired with the construction methods and material requirements of the Standard Specifications for Road and Bridge Construction adopted by the Division of Highways, Department of Public Works and Buildings, State of Illinois, and supplemental specification thereto, effective January 2, 1971.
d. Following the repair of the existing pavement, a third lift shall be added to the existing pavement which shall include priming and resurfacing with a bituminous concrete surface course, subclass 1-11. All materials, equipment and construction methods shall be in accordance with the Standard Specifications for Road and Bridge Construction adopted by the Division of Highways, Department of Public Works and Buildings, State of Illinois, and supplemental specifications thereto, effective January 2, 1971. The surface course shall have a compacted thickness of one inch (1"), except in a three foot (3') wide strip along each side of the pavement in which the thickness shall be gradually decreased to one-fourth inch (1/4") at the edge of the pavement.
5. Specifications on File: The standards and specifications referred to in this subsection F may be reviewed in the office of the Director of Engineering and Community Development.
G. Alley Pavements: All alleys shall be improved with a roadway consisting of not less than eight inches (8") of stone or gravel when thoroughly compacted and two inches (2") of bituminous concrete surface of the following widths:
1. Through apartment district blocks, not less than twenty feet (20').
2. Through business and industrial blocks, not less than twenty four feet (24').
H. Curbs and Gutters: A suitable concrete curb and gutter shall be constructed along the outside lines of all street pavements. Curb and gutter in residential areas shall have a three inch (3") mountable curb with a twelve inch (12") gutter flag. Curb and gutter in industrial and commercial areas shall have a six inch (6") barrier curb with a twelve inch (12") gutter flag, except at driveway aprons where depressed curb shall be constructed. Depressed curb shall also be constructed at all sidewalks. Said curbs and gutters shall be constructed of concrete, three thousand five hundred (3,500) PSI strength at fourteen (14) days and contain two (2) one-half inch (1/2") metal reinforcing rods in residential areas, two (2) three-quarter inch (3/4") rods in industrial and commercial areas and shall be subject to the approval of the Director of Engineering and Community Development. Expansion joints one-half inch (1/2") thick shall be placed at intervals of fifty feet (50') in the curb and where specified by the Director of Engineering and Community Development. Two (2) three-quarter inch (3/4") dowels shall be provided at every expansion joint.
I. Sidewalks: If the property subdivided is located within the Village or immediately adjacent thereto, sidewalks shall be required. Walks without parkways between street pavement and sidewalks are prohibited. Sidewalks shall be extended to the curb at "T" intersections adjacent to park sites, commercial areas, school sites and heavy use areas such as churches and hospitals except if one of the intersecting streets is a cul-de-sac street, in which case sidewalks shall be extended to the curb only at school site locations. All sidewalks shall be constructed in accordance with the following Elk Grove Village sidewalk standards:
1. Generally: The work performed under these standards shall consist of the construction of Portland cement concrete sidewalks constructed as described herein. Such sidewalks shall have a minimum width of four feet (4") and a minimum thickness of five inches (5"). Where adjacent sidewalks exist, sidewalks shall be constructed to meet the grade of such sidewalks or as may be directed by the Director of Engineering and Community Development or his representative. The location of sidewalks and grade of sidewalks, when no adjacent sidewalks exist, shall be as directed by the Director of Engineering and Community Development or his representative.
2. Materials: All materials shall conform to the requirements of Division III, Material Details, as set out in the Standard Specifications for Road and Bridge Construction, adopted January 2, 1958, by the Division of Highways, Department of Public Works and Buildings, State of Illinois and supplemental specifications thereto, effective January 3, 1966.
3. Procedures Involving Concrete: Sidewalks shall be constructed of Class X concrete as defined in section 52 of the standard specifications and supplemental specifications aforesaid. The composition, consistency, mixing, placing, compacting, finishing and curing of concrete for sidewalks shall be in accordance with the requirements of the applicable paragraphs of said section 52 and the supplemental specifications, except for requirements that may be otherwise stated herein, which shall take precedence over the standard specifications and supplemental specifications.
a. Proportioning Concrete: The proportions of cement, fine aggregate, coarse aggregate and water will be determined by the contractor and shall have the approval of the Director of Engineering and Community Development before the work begins so as to produce a workable plastic concrete having a compressive strength of not less than three thousand (3,000) pounds per square inch when tested by standard methods. The proportions shall include not less than six (6) bags of cement per cubic yard of concrete. This determination shall be based upon tests of the aggregates selected by the builder for use in the work. The quantities of aggregates for each batch of concrete shall be measured by weight. Delivery tickets shall be furnished to the Village at the time of pouring, when requested.
b. Subgrade Preparation: The subgrade shall be tamped or rolled until thoroughly compacted and shall be constructed true to grade. The sidewalk shall be laid upon a base of granular material a minimum of two inches (2") in thickness. Fill, where required, must be compacted solidly. Materials for fills shall be gravel or crushed stone and placed and tamped in six inch (6") layers. The top of all fills shall extend at least one foot (1') beyond the edge of the walk. Subgrade in cut shall be prepared sufficiently wide to accommodate the forms. Side slopes shall slope one foot (1') vertical to three feet (3') horizontal to meet existing ground surface.
c. Forms: Side forms shall be of lumber of not less than two inches (2") nominal thickness and a minimum depth of five inches (5") or of steel of equal rigidity. No two by four (2"x 4") forms shall be used. They shall be held securely in place by stakes or braces with the top edge true to line and grade. The forms for the sidewalk shall be set so that the slab will have a fall of one inch vertical to four feet horizontal (1":4') from the edge nearest the property line toward the edge farthest from the property line, except as may be otherwise directed by the Director of Engineering and Community Development or his representative.
d. Reinforcing: Reinforcing bars shall be embedded in the concrete at mid-depth in a longitudinal direction over all existing water or sewer services or other utilities buried beneath the sidewalk. Three-fourths inch (3/4") diameter bars each with a minimum length of ten feet (10') shall be installed over each utility. The bars shall be equally spaced across the width of the sidewalk.
Bars shall conform with the current standard specifications for Billet Steel Concrete Reinforcement Bars of Intermediate Grade A.S.T.M. Serial Designation A15. Suitable chairs and other holding devices shall be provided to insure the proper position of the reinforcement.
e. Placing and Finishing: After the subgrade has been finished and prior to placing concrete, the contractor shall notify the Director of Engineering and Community Development twenty four (24) hours prior to pouring. No concrete shall be placed until the subgrade has been inspected and approved by the Village.
The subgrade shall be moistened just before the concrete is placed. The concrete shall be placed in successive batches for the entire width of the slab, struck off from one-half inch (1/2") to three-fourths inch (3/4") higher than the finished slab, tamped until all voids are removed and free mortar appears on the surface, thoroughly spaded along the edges, struck off to the true grade and finished to a true and even surface with floats and trowels. The final troweling shall be done with a steel trowel leaving smooth, even surface. After the water sheen has disappeared, the surface shall be given a final finish by brushing with a whitewash brush. The brush shall be drawn across the sidewalk at right angles to the edges of the walk with adjacent strokes slightly overlapping, producing a uniform, slightly roughened surface with parallel brush marks.
The surface shall be divided by grooves constructed at right angles to the center line of the sidewalk. These grooves shall extend to one-fourth inch (1/4") in width and shall be edged with an edging tool having a one-fourth inch (1/4") radius. All slabs shall be four feet (4') long on any one side unless otherwise ordered by the Director of Engineering and Community Development. The edges of the slabs shall be edged as described above.
f. Temperature Control: Temperature control shall be in accordance with the requirements of article 48.30 of the standard specifications aforesaid and approval of the Director of Engineering and Community Development.
g. Protection From Low Temperatures: The sidewalk shall be protected from low temperatures as specified in article 48.31 of the standard specifications and supplemental specifications aforesaid. No concrete shall be placed on ice, snow or frozen subgrade. The builder shall be responsible for all concrete damaged by low temperatures and any concrete so damaged shall be removed and replaced by him at his expense.
h. Expansion Joints: Expansion joints of the thickness specified below shall consist of preformed joint filler. The top of the joint shall be placed one-fourth inch (1/4") below the surface of the sidewalk.
(1) Expansion joints of one-half inch (1/2") thick shall be placed between the sidewalk and all structures such as light standards, traffic light standards, traffic poles and any other public utilities which extend through the sidewalk.
(2) Expansion joints one-half inch (1/2") thick shall be placed at intervals of fifty feet (50') in the sidewalk and where specified by the Director of Engineering and Community Development. Where the sidewalk is constructed adjacent to pavement or curb having expansion joints, the expansion joints in the sidewalk shall be placed opposite the existing expansion joints as nearly as practicable. Expansion joints shall also be placed where the sidewalk abuts existing sidewalks, between driveway pavement and sidewalk and between sidewalk and curbs where the sidewalk abuts the curb.
i. Backfill: After the concrete has been cured, forms shall be removed and the space near the edges of the sidewalk shall be backfilled to the required elevation with material approved by the Village. The material shall then be compacted until firm and the surface evenly graded.
j. Curing: Sidewalks must be cured as specified in article 48.26 of the standard specifications and supplemental specifications.
4. Disposal of Surplus Material: Surplus or waste material resulting from the sidewalk construction operation shall be disposed of by the builder.
5. Control of Materials: The builder shall, at his expense, have a reputable testing laboratory satisfactory to the Village make one fourteen (14) day compressive test and one twenty nine (29) day compressive test on concrete cylinders made from concrete taken from the forms. The laboratory shall make a written report to the Village on their findings. All work shall be done in accordance with standard procedures. One report and the associated tests shall be submitted for each day's run of concrete placement.
6. Guarantee: All work constructed under these standards shall be guaranteed by the builder to be free from defects in workmanship and materials and he shall replace or repair any defective work or material upon written notice from the Village that such defects exist for a period of two (2) years from the date of written acceptance of the completed work by the builder.
The developer shall deposit with the Village a bond in the amount of fifteen percent (15%) of the improvement cost at the time of Village acceptance of the sidewalk as collateral security for the guarantees hereunder unless otherwise provided for.
J. Street Signs: The subdivision shall be provided with street signs of a type approved by and erected at locations and in the manner prescribed by the Mayor and Board of Trustees.
K. Underground Public Utilities: The subdivider and developer shall cause all utility distribution lines for telephone, gas and electric service to be installed and placed underground within easements or dedicated public ways; said installations to be in compliance with all orders, rules and laws of the State of Illinois and agencies thereof.
L. Street Lighting: The subdivider and developer shall install street lighting in accordance with the following provisions:
1. General Provisions:
a. The subdivider or developer shall first submit four (4) sets of plans for street lighting to the Director of Engineering and Community Development, said plans being prepared by an engineer registered by the State of Illinois.
b. The subdivider or developer shall be responsible for coordinating the improvement work, correcting faulty work and consulting with the Director of Engineering and Community Development in the settlement of any construction disputes, plan changes or plan adjustments.
c. The subdivider or developer shall notify the Director of Engineering and Community Development twenty four (24) hours in advance of construction work; all contract work to be approved by the Director of Engineering and Community Development.
d. All electrical and power connections shall be in accordance with the requirements of the Commonwealth Edison Company.
e. Upon completion of construction of lighting facilities, two (2) sets of "as-built" plans shall be delivered to the Director of Engineering and Community Development.
2. Performance:
a. Lighting levels and luminary mounting height shall be determined in accordance with the following:
Roadway Class | Minimum Mounting Height | Minimum Lamp Size
|
Major streets | 26' | 400 Watt- 20,500 lumens |
Collector streets | 25' | 175 Watt- 7,800 lumens |
Minor streets | 15' | 100 Watt- 4,000 lumens |
For the purposes hereof, the following definitions shall apply:
COLLECTOR STREET: Oakton, Landmeier Road, Elk Grove Boulevard, J. F. Kennedy, Biesterfield Road, Nicholas Boulevard, Pratt Boulevard and those streets designated as collector streets by the Thoroughfare Plan adopted as part of the Village Plan.
MAJOR STREET: Any State or County highway.
MINOR STREET: All streets not designed as major streets or collector streets.
b. All luminaries shall have medium vertical distribution, semi-cutoff control and I.E.S. Type II or III lateral distribution with a phosphor-coated mercury lamp.
c. There shall be at least one luminary at each street intersection, pronounced street curvatures, cul-de-sacs and mid-block intervals. Luminaries shall be not more than five hundred feet (500') apart.
d. Luminary standards shall be located not closer than two feet six inches (2'6") from the back of curbs. They shall be located alternately on both sides of the street. Intersections of minor roads with collector or major roads shall have a standard-luminary-lamp combination as determined for the higher traffic street as indicated above.
3. Materials:
a. Standards: Lighting standards shall be painted, wooden poles. A cable entrance slot shall be provided below grade. Standards shall be set back not closer than two feet six inches (2'6") behind the back of the curb. They shall be similar to the design of existing standards throughout the Village. A metal bracket of a sufficient length to place the luminary as close to the center of the roadway as possible shall be mounted on the standard.
b. Luminaries: All luminaries shall be mercury vapor type, complete with an integral regulator ballast and a twist lock receptacle for photo-electric control.
Luminaries shall be die-cast aluminum with a specular reflector and glass prismatic refractor. A side-mounted slip fitter shall be capable of adapting to one and one-fourth inch (11/4") to two inch (2") mounted brackets.
c. Cable: Single conductor, Neoprene jacketed, U.S.E. type 600-volt direct burial copper cable of a size designed to limit the voltage drop at the lamps to five percent (5%) shall be used. When laid in parkway, such cable shall be installed two feet (2') from and parallel to the back of the curb.
d. Pole Wire: Wiring from the pole to the luminary shall be #10 gauge with RH-RW insulation.
e. Controls: Each luminary shall be controlled by individual photo-electric control unit.
4. Installations:
a. Trenching and Backfilling: All trenches shall be a minimum of twenty four inches (24") in depth. Surplus soil shall be hauled away at the expense of the installer. Developer shall restore area to prior condition upon completion.
Where trenching occurs in lawn areas, the backfilling shall be puddled and tamped and reseeded.
b. Cable Laying: Direct burial cable shall be placed to leave slack in the line. Sharp bends and kinks shall be avoided.
c. Pole Setting: After poles are set in place they shall be compacted around the butt. Poles shall be plumbed to ensure straightness.
d. Wiring: Sufficient wire slack shall be allowed at the base of pole to make secure splices. Connectors shall be of the solderless type taped to exceed the insulation value of the conductors. Control cabinets shall be grounded according to Chapter 2 of this Title.
e. Testing: On completion of an installation, the luminaries shall be tested for distribution and adjusted, if necessary, to correct the light pattern. Wiring shall be tested for shorts or grounds and replaced if required.
M. Trees:
1. Number, Location And Type:
a. Street trees shall be planted throughout the entire residential subdivision and commercial establishments within residential areas. Such trees shall be planted in the parkways equidistant between the sidewalks and curb and no closer than five feet (5') from any sanitary service, water service or driveway apron. The trees shall be spaced not more than fifty feet (50') apart and not less than one per lot. At street corners, trees shall be located at least twenty feet (20') from the intersection of street right-of-way lines.
b. Trees initially planted to meet the requirements of this subsection and all replacement trees planted after acceptance by the Village shall be balled and burlapped or bare root trees, except replacement of healthy trees, as determined by the Village, shall be balled and burlapped. The minimum trunk diameter of all trees, measured at a height of six inches (6") above the finished ground level, shall be two and one-half inches (21/2").
c. The following trees are acceptable to the Village for such planting:
Norway Maple (seedless)
Red Maple (seedless)
White Ash (seedless)
Blue Ash (seedless)
Green Ash (seedless)
Hesse European Ash
Big Leaf Linden (seedless)
Little Leaf Linden (seedless)
European Hornbeam
American Hornbeam
Katsura Tree
Tulip Tree
White Oak
Red Oak
English Oak
Sawtooth Oak
Burr Oak
Hackberry
Ginkgo (male only)
Village Green Zelkova
Flowering Pear (fruitless)
Honeylocust (seedless and thornless)
The Director of Engineering and Community Development shall be provided a list by December 1 of all trees planted during the previous year; this information shall include the lot numbers, type of tree planted on each lot and the dates of planting.
d. No more than twenty percent (20%) of all trees planted within a subdivision shall be of the same type unless prior approval is given by the Director of Engineering and Community Development. Trees of any one type shall be dispersed equally throughout the subdivision or commercial area.
e. All trees planted shall meet the specifications on file in the Village Clerk's office and the Department of Engineering and Community Development, which specifications are attached to Ordinance 1413 as Exhibit A and incorporated into this subsection by reference.
2. Guarantee: All trees shall be guaranteed for one full year following planting. After one year, all trees not in a vigorous growing condition, as determined by the Director of Engineering and Community Development, shall be replaced. All replacement trees shall bear the same guarantee. The Director of Engineering and Community Development shall be notified, in writing, thirty (30) days prior to the expiration date of the guarantee period, that the guarantee is ending. No tree shall be accepted by the Village unless approved in writing by the Director of Engineering and Community Development.
(1961 Code §8.005, amd. Ord. 581, 11-26-1968; Ord. 719, 10-27-1970; Ord. 730, 12-1-1970; Ord. 814, 6-13-1972; Ord. 1054, 4-13-1976; Ord. 1113, 12-14-1976; Ord. 1322, 9-14-1979; Ord. 1413, 10-14-1980; Ord. 1566, 4-5-1983; Ord. 1697, 2-12-1985; Ord. 1698, 2-12-1985; Ord. 1869, 1-27-1987; 1992 Code; Ord. 2519, 11-12-1996)
Cross-reference:
See diagrams following subsection 8-12B-1-2A1
See also Title 7, Chapter 7, Article A of this Code
See also Title 7, Chapter 2 of this Code
See also subsection 7-2-5-2B of this Code
See also subsection 8-12B-1-2G of this Article