A. Generally: Where applicable, the State of Illinois Standard Specifications for Road and Bridge Construction, Department of Highways, current edition, shall be considered as a part of the following specifications in use. (Ord. 0-77-57A, 2-9-77)
B. Pavement Widths: Street widths shall be in two (2) classifications of varying width and shall follow the following descriptions:
1. Thoroughfares shall be interpreted to mean those streets which are major connecting streets within the Village or its jurisdictional limits and shall consist of a minimum pavement width of twenty four feet (24') and a minimum base course width of twenty four feet (24').
2. All other streets shall be twenty two feet (22') in width and a minimum base course width of twenty two feet (22').
C. Standard Street Cross-Section:
1. A standard street cross-section shall consist of the pavement width herein specified with a minimum six foot (6') shoulder on each side which shall consist of four inches (4") of black soil and a permanent seeding of approved grasses with a planting of not less than one hundred twenty five (125) pounds per acre for the remainder of the shoulder width. All seed shall be properly fertilized and maintained until accepted by the Village Board upon recommendation by the Village Engineer, but in no case less than eighteen (18) months.
2. Ditches shall normally have a three foot (3') horizontal to a one foot (1') vertical slope, and shall have a minimum width of two feet (2'). Minimum depth of ditches below the center line of road grade shall be eighteen inches (18") with a minimum grade of seventy five hundredths percent (0.75%) unless otherwise specified by the Village Engineer. Any ditches having depths greater than five feet (5') shall have adequate storm sewers of design and specifications as approved by the Village Engineer. Whenever drainage ditches are of such capacity that, in the Village Engineer's opinion, the ditch bottoms shall be subject to erosion, then the Village Engineer may require the installation of a stone bed of such design to prevent said erosion.
3. To the extent that the minimum width of any right of way required to be dedicated pursuant to the applicable provisions of this Title is not sufficient to locate ditches in compliance with the specifications herein required, easements shall be granted to the Village in form and substance as will be reasonably acceptable to the Village in order to provide sufficient area for the location of such ditches.
4. The pavement crown at the center line of the pavement shall be three inches (3") above the edge of the pavement.
5. Backslopes, where necessary to meet existing grades, shall have a three foot (3') horizontal to one foot (1') vertical slope and shall be extended to meet existing ground lines.
6. Street cross-sections shall be standard in all locations with the exceptions of the actual pavement width, as hereinabove specified. (Ord. 84-212, 11-8-84)
D. Excavations: Excavated materials shall be placed in locations not offensive to the subdivision and shall not be placed in the vicinity of a proposed building site. All subgrade material shall be of stable clay material and excavation shall continue until all material has been removed which is not stable clay material. All cutting and filling shall be subject to cut and fill requirements and restrictions as required in Section 11-3-6 of this Chapter.
No base course work shall be constructed until after the sub-base has been inspected and approved by the Village Engineer. No surface course work shall be started until the base course work has been inspected and approved by the Village Engineer. (Ord. 0-77-57A, 2-9-77)
E. Base and Surface Courses:
1. Alternate Methods:
a. Residential Streets: All streets in residential subdivisions shall follow the base and surface requirements of one of the following three (3) alternates; all as per State of Illinois requirements:
(1) Alternate A: Ten inches (10") of grade nine (9) crushed gravel or grade eight (8) limestone, done in two (2) lifts of five inches (5") each and compacted to a density of not less than ninety five percent (95%). Surface courses shall consist of one and one-half inches (11/2") of bituminous binder course Cl.1 and one and one-half inches (11/2") of bituminous concrete surface course Cl.1. Surface courses shall be laid in two (2) lifts. All stone or gravel base course shall be primed with MC-O liquid asphalt at a rate of one-third (1/3) gallon per square yard.
(2) Alternate B: Six inches (6") of pozzolonic base course T-A. Surface courses are to consist of one and one-half inches (11/2") of bituminous concrete binder course Cl.1 and one inch (1") of bituminous concrete surface course Cl.1. Surface courses shall be laid in two (2) lifts. Bituminous curing cover shall be applied at the time and rate specified in the "Standard Specifications For Road And Bridge Construction", state of Illinois, current edition.
(3) Alternate C: Six inches (6") bituminous aggregate mixture (BAM). Surface courses are to consist of one and one-half inches (11/2") of bituminous concrete binder course Cl.1 and one inch (1") of bituminous concrete surface course Cl-1. Surface courses shall be laid in two (2) lifts.
b. Commercial Streets: All streets in commercial subdivisions shall follow the base and surface requirements of one of the three (3) alternates; all as per state of Illinois requirements:
(1) Alternate A: Ten inches (10") of grade nine (9) crushed gravel or grade eight (8) limestone, done in two (2) lifts of five inches (5") each and compacted to a density of no less than ninety five percent (95%). Surface courses are to consist of two inches (2") bituminous concrete binder course Cl.1 and two inches (2") of bituminous concrete surface course class Cl.1. Surface courses shall be laid in two (2) lifts. All stone or gravel base course shall be primed with an MC-O liquid asphalt at a rate of one-third (1/3) gallon per square yard.
(2) Alternate B: Six inches (6") of pozzolonic base course T-A. Surface courses to consist of one and one-half inches (11/2") of bituminous concrete binder course and one and one-half inches (11/2") of bituminous concrete surface course Cl.1. Surface courses shall be laid in two (2) lifts. Bituminous curing cover shall be applied at the same time and rate specified in the "Standard Specifications For Road And Bridge Construction", state of Illinois, current edition.
(3) Alternate C: Six inches (6") of bituminous aggregate mixture (BAM). Surface courses shall be same as alternate B.
c. Industrial Streets: All streets in industrial subdivisions shall follow the base and surface requirements of one of the following three (3) alternates; all as per state of Illinois requirements:
(1) Alternate A: Twelve inches (12") of grade nine (9) crushed gravel or grade eight (8) limestone, done in two (2) lifts of six inches (6") each and compacted to a density of no less than ninety five percent (95%). Two inches (2") of bituminous concrete binder course and two inches (2") of bituminous concrete surface course Cl.1. Surface course shall be laid in two (2) lifts.
(2) Alternate B: Six inches (6") of pozzolonic base course T-A. Surface courses are to consist of two inches (2") of bituminous concrete binder course Cl.1 and one and one-half inches (11/2") of bituminous concrete surface course Cl.1. Surface courses shall be laid in two (2) lifts.
(3) Alternate C: Six inches (6") of bituminous aggregate mixture (BAM). Surface course requirements shall be the same as alternate B. (Ord. 0-84-212, 11-8-1984)
d. Residential Streets And Commercial Streets For Subdivisions Approved On Or After November 22, 1987: All streets in residential and commercial subdivisions having received preliminary plat approval on or after November 22, 1987, shall follow the base and surface requirements of one of the following two (2) alternates, all as per state of Illinois requirements, and the provisions of the following subsections E1d(2) and E1d(4) of this section:
(1) Alternates:
(A) Alternate A: Twelve inches (12") of grade nine (9) crushed gravel or grade eight (8) limestone, done in two (2) lifts of six inches (6") each and compacted to a density of not less than ninety five percent (95%). Surface courses shall consist of two inches (2") of bituminous binder course class I and two inches (2") of bituminous concrete surface course class I. Surface courses shall be laid in two (2) lifts. All stone or gravel base course shall be primed with MC-O liquid asphalt at a rate of one-third (1/3) gallon per square yard.
(B) Alternate B: Base course to be six inches (6") of bituminous aggregate mixture (BAM M.S. 1700). Surface courses are to consist of two inches (2") of bituminous concrete binder course class 1 and one and one-half inches (11/2") of bituminous concrete surface course class 1. The BAM base course shall be laid in two (2) lifts.
All thickness of material above shall mean compacted thickness. Binder course (class 1) must be installed as soon as the gravel base and subgrade reaches ninety five percent (95%) compaction as witnessed by the village engineer and tested by the developer's consultants. The bituminous binder course for all flexible type pavements must set for a minimum of nine (9) months during which time the developer shall be responsible for the maintenance, repair or replacement of same.
(2) Additional Requirements:
(A) After eighteen (18) months following the installation of the binder course, the surface course shall be installed pursuant to the specifications set forth herein.
(B) When a minimum of seventy five percent (75%) of all lots in the subdivision in which said street is located shall have been granted certificates of occupancy by the village building department the surface shall be ground and a final surface course shall be installed. This seventy five percent (75%) occupancy requirement may be determined in a completed phase, unit or other divisional area basis. If any street in a single phase or unit within the subdivision has met the seventy five percent (75%) occupancy requirement, the village engineer may grant in writing approval for the grinding of the surface and the installation of the final surface course of asphalt (class 1) within that phase or unit. The president and board of trustees may grant relief from the seventy five percent (75%) requirement established herein, provided it has received a written recommendation for such relief from the village engineer, which recommendation shall set forth any damage and hardship which may be incurred by strict adherence to the seventy five percent (75%) requirement.
(C) The developer is responsible for the maintenance of all public improvements covered by the letter of credit until said improvements have been accepted by the village and the maintenance period has expired in accordance with subsection 11-3-16C of this chapter.
(3) Report: After the above requirements have been met, a report shall be prepared by a village soil consultant at the developer's/subdivider's expense listing the existing thicknesses of base and binder courses. Upon receipt of the reports, the village engineer will review and approve said report and will perform an inspection of the existing base and binder courses. Any and all base and binder course failures will then be repaired to the village engineer's satisfaction.
(4) Approval: Approval by the village engineer must be granted in writing before the surface course can be applied.
(5) Corrugated Edging: In instances where preliminary plat approval has been granted prior to the effective date hereof, provided the preliminary plat approval has not expired due to the time requirement as set forth in chapter 2 of this title and curb and gutter is not used, any surface course hereafter installed shall contain a corrugated edging (rumble strip) two feet (2') in length and one foot (1') in width installed along the edge of the road placed at twenty foot (20') increments.
2. Standard And Maintenance:
a. All thickness of material above, except for subsection E1d of this section, shall mean compacted thickness. Base stone, gravel and bituminous binder course for all flexible type pavements must set for a minimum of nine (9) months during which time the developer shall be responsible for the maintenance, repair or replacement of same.
b. Immediately prior to paving, and prior to placement of fabric and aggregate stone earthwork, there shall be a proof roll of the entire length of the street to be paved, along both sides of the street, with truck tires within one foot (1') of the intended edge of the paving, with a: 1) semitruck loaded seventy three thousand (73,000) pounds, or 2) a six (6) wheel truck loaded to sixty eight thousand (68,000) pounds. Prior to proof roll, street clay base shall be bladed smooth, without holes or indentations in excess of one inch (1"), and with the form factor of the crown conforming to profile required herein. Proof roll to be witnessed and approved by two (2) village personnel, as designated by the chairman of the public works committee. Proof roll to show no visible deflection.
3. Minimum Percentage Fully Improved: A minimum of seventy five percent (75%) of all lots in the subdivision in which said street is located shall have been fully improved with buildings which have been granted certificates of occupancy by the village building department before the final surface course is installed. If any street in a single phase or unit within the subdivision has met the seventy five percent (75%) occupancy requirement, the village engineer shall grant in writing approval for the installation of the final surface course of asphalt (class 1) within that phase or unit. (Ord. 2004-726, 9-9-2004)
4. Corrugated Edging: The surface course shall contain a corrugated edging (rumble strip) two feet (2') in length and one foot (1') in width installed along the edge of the road placed at twenty foot (20') increments.
5. Pavement Sample Cores: After the above requirements have been met, except for subsection E1d of this section, pavement sample cores must be taken at intervals required by the village engineer listing the existing thicknesses of base and binder courses and the type and condition of subgrade material as determined from the cores.
6. Report Review And Inspection: Upon receipt of the report, the village engineer will review said report and will perform an inspection of the existing base and binder courses. All base and binder course failures will then be repaired to the village engineer's satisfaction.
7. Permission Required: Permission must be granted in writing before the surface course (class I) can be applied in accordance with the "Standard Specifications For Road And Bridge Construction", state of Illinois, current edition.
F. Street Plans: Engineering plans and specifications shall be furnished for all street improvements being proposed within the village and shall contain the following items and conform to the following regulations:
1. No street grade shall be less than four-tenths percent (0.4%), nor more than ten percent (10%) for pavement widths of twenty feet (20') or more.
2. No sharp curves or right angles shall be permitted for the length of any street.
3. All corner radii of pavement shall have a minimum radius of twenty five feet (25') and will vary in accordance with the aforementioned state of Illinois specifications, depending upon the angle of street intersections.
4. No street intersections shall be made at less than seventy degrees (70°) and shall be made at ninety degrees (90°) unless existing conditions warrant a change not in excess of the seventy degrees (70°) aforementioned.
5. All plans shall indicate elevations based on United States geodetic survey sea level datum and with sufficient information on existing improvements or conditions. All storm sewers shall be designed on a basis of a flood frequency of a 10-year storm. All roadway culverts and ditches shall be designed on a flood frequency based on a 25-year storm.
6. All engineering plans and specifications shall be submitted to the village engineer for approval before any construction can be instituted.
7. After engineering plans and specifications have been approved by the village engineer, no revisions shall be allowed without express permission of the village engineer. Final approved engineering plans shall be submitted in triplicate. (Ord. 0-77-57A, 2-9-1977)
G. Approval And Acceptance: After approval of the completion of the final street pavement surface course, all maintenance and repairs shall be the responsibility of the developer for a period of two (2) years following said approval. Prior to the remaining requirements of this chapter, all repairs, replacement and corrections shall be made, where required, by the subdivider at its cost. Before returning any bonding or contract guarantee with the village, the subdivider shall obtain a statement from the village engineer stating that all construction is substantially in accordance with plans and specifications submitted and have been completed in accordance with the applicable standards and shall obtain final approval of the board of trustees.
After the two (2) year period following said completion and approval, and as a requirement to acceptance of all public improvements required by this title, a detailed inspection of such improvements shall be made by the village engineer, a village executive officer and a representative of the developer. After certification by the village engineer and village executive officer that all construction has been completed in accordance with the plans and specifications previously approved by the village, the village board will formally accept the required improvements. Prior to such acceptance however, the engineer employed by the developer shall prepare and submit to the village one complete set of Mylar reproducible as built drawings of all installed improvements on which also are shown or indicated any changes in the original construction drawings that were made during the construction period.
The acceptance of the completed street by the village in no way relieves the subdivider of responsibility for negligence or careless acts. The acceptance of the streets, however, does constitute an official recognition by the village of its responsibility for the maintenance of the streets from the date of acceptance. All streets shall then become the property of the village and no further work shall be done by the developer unless specifically authorized by the proper village authority.
The application and enforcement of ordinances and performance of functions relating to the health, safety and welfare of the residents of South Barrington, including, but not limited to, traffic ordinances, street maintenance and snow plowing and removal shall not constitute acceptance of a street not previously accepted. (Ord. 0-86-260, 12-11-1986)
H. Insurance: During the construction of the improvements and until the village board has accepted said improvements by ordinance or resolution, the village shall not be responsible for any liability incurred and the owner and contractor shall carry sufficient liability insurance to cover any liability incurred during said period of time. Prior to commencing work, said owner and contractor shall submit a certificate of insurance subject to the approval of the board of trustees.
I. Inspections: All material used on street projects shall be of the quality, type and size previously mentioned and the material shall be subject to inspection by the village and its authorized representatives. The site must remain open for inspection by any village official or his representative at all times. (Ord. 0-77-57A, 2-9-1977)