Village of Williamsville, IL Article VII Required Improvements

§ 263-38 Certification by Village Engineer required.

A final plat for subdividing shall be approved by the Village Board only after receipt of a statement signed by the Village Engineer certifying that the plans and specifications for improvements described therein have been prepared by a registered professional engineer licensed in the State of Illinois and that construction conforms with the requirements under Article IV of this chapter, and meets the minimum requirements of all applicable ordinances of the state, county and Village in compliance with the following.

§ 263-39 Streets, alleys, monuments, pedestrianways and public utilities.

A. An Illinois registered professional engineer or an Illinois registered land surveyor acting for the subdivider shall meet with the Williams Township Highway Commissioner and the Chairman of the Streets and Alleys Committee of the Williamsville Board of Trustees on the location of the subdivision and shall present sufficient data and information relative to the proposed street improvements to ensure satisfactory grading and drainage. The Williams Township Highway Commissioner may refer matters that require additional clarification to the County Engineer.

B. The subdivider shall enter into a contract with the Williamsville Board of Trustees wherein for the consideration of the acceptance of the street improvements by the Commissioner, the subdivider agrees to construct streets in the subdivision to the standards prescribed herein at his own expense with no cost to the township or the county. The subdivider shall post a surety bond, letter of credit or certified check for completion in the full amount of the cost of construction plus 25% for all the required improvements listed herein as estimated by a registered professional engineer or registered land surveyor who has been approved by the governing authority to insure the faithful performance of this contract.

C. Plans. Streets shall be completed to the grades shown on plans, profiles, and cross-sections provided by the subdivider and prepared by a registered professional engineer.

D. Grading.

(1) The full width of the right-of-way shall be graded, including the subgrade of the areas to be paved.

(2) All stumps and trees that cannot be saved, boulders, and similar items shall be removed.

(3) All grading in the subdivision shall be related to the topography of the surrounding area. All street embankments shall be raised at least 1 1/2 feet above high water.

E. Surface water drainage.

(1) The subdivision shall have an adequate stormwater detention and stormwater system, which shall be connected to an approved outlet.

(2) In subdivisions, in business and industrial districts, underground storm sewer systems shall be constructed throughout the subdivision and connected to an approved outlet.

F. Subsurface water drainage (sump pump discharge). The developer shall provide a plan to handle the discharge of sump pump water.

G. Minimum pavement widths.

(1) All streets shall be improved with pavements to an overall width in accordance with the following minimum dimensions:

	Type of Street	Pavement Width*
	Major thoroughfares	In accordance with federal, state, county or local plans
	Collector	27 feet
	Minor street	27 feet
	Cul-de-sac	27 feet
	Marginal access street	27 feet
	Half street	1/2 the width of the proposed street but not less than 20 feet

*

(Edge of pavement to edge of pavement).

(2) Pavement in cul-de-sac turnarounds in all developments shall have a minimum diameter of 90 feet, measured from edge of pavement to edge of pavement, with a V-type gutter. The entering and exiting radius of a turnaround shall be at least 30 feet.

(3) Streets in industrial or business subdivisions may be required to have greater width as directed by the Planning Commission.

H. Roadway surfacing.

(1) Illinois bearing ratio tests of the soils under the proposed street, including the width of the curb and gutter, shall be required for all streets before surfacing, base, and subbase thicknesses are determined. The Village Engineer shall review findings of the subdivider's engineer before and after the design of the roadway surfacing takes place.

(2) The Village Engineer shall be given 48 hours' notice to inspect the prepared subgrade prior to the placement of any subbase, base or pavement structure. Compaction tests will be required, at a minimum, every 100 linear feet with the locations of the tests to be determined by the Village's Engineer. This frequency of the compaction testing will also be required for any subbase or base course construction.

(3) Pavements shall be installed and materials shall conform to the applicable articles of the most recent edition of the Standard Specifications for Road and Bridge Construction, adopted by the Illinois Department of Transportation.

(4) Pavement construction.

(a) Pavements shall be constructed in accordance with the table below.

	Minimum Design Criteria by Type of Street
	Type	Minimum Design Criteria
	Flexible pavement	3-inch bituminous concrete, Class 1 (1 1/2 inch binder course and 1 1/2 inch surface course). Aggregate base course, Type A (CA-6), 8 inches.
	Rigid pavement with subbase	Portland cement concrete, Class SI, (Nonreinforced), 6 inches. Aggregate subbase, Type A (CA-6), 4 inches.
	Rigid pavement without subbase	Portland cement concrete, Class SI, (Nonreinforced), 7 inches.

(b) Variance from minimum design criteria by type of street. The developer may file a written application for a variance with the Planning Commission from the minimum characteristics by type of street for pavement thickness as follows:

[1] The developer shall attach to the application the recommendations of a registered professional engineer regarding the variance requested in the pavement thickness and all documentation supporting said engineer's recommendations.

[2] The Planning Commission shall forward said application and documentation to the Village Engineer for review. The Village Engineer shall report its findings to the Planning Commission. The Planning Commission, after a public hearing, shall make a recommendation to the Village Board to either grant or deny the requested variance.

[3] The Village Board shall make the final determination as to whether to grant or deny the requested variance.

[4] The developer shall reimburse the Village of Williamsville for all of the Village's expenses associated with the review of the requested variance, including but not limited to the costs and fees of the Village Engineer. Said reimbursement shall be made prior to the Village Board's granting or denying the requested variance.

(5) Construction approval.

(a) In order to ensure compliance, developers must contact the Streets Chairman, the Village President, a Village Trustee or the Village Streets Superintendent 48 hours in advance of the specified construction activities. The Streets Chairman, Village President, Village Trustee or Village Streets Superintendent will in turn notify the Village Engineer so that construction approval can be obtained. In order to minimize construction delays, two signatures from the Streets Chairman and the Village President or one other Board member, along with documentation of the approved activity, will suffice as an interim approval to continue construction and only after consulting with the Village Engineer. This document will be kept on file in the Village office.

(b) A copy of the subdivision regulations will be sent to all developers (within the Village) with a cover letter informing them of the specific construction activities that require prior approval from the Village Engineer. This letter should be sent via certified mail. Developers will be encouraged to seek clarification of the subdivision regulations through the Village Board.

(c) Comprehensive list of construction activities that require prior approval are as follows:

[1] Grading.

[2] Sanitary sewer construction.

[3] Storm sewer construction.

[4] Curb and gutter construction.

[5] Base course construction.

[6] Water main construction.

[7] Streetlight construction.

[8] Binder and surface course construction.

I. Curbs and gutters. All subdivisions shall be provided with portland cement concrete valley gutters. Valley gutters shall not be less than 24 inches in width and not less than eight inches thick where the gutter abuts the street pavement.

J. Sidewalks. Portland cement concrete (Class SI mix) at least four feet wide and four inches thick with a slope conforming to all other sidewalk ordinances[1] of the Village of Williamsville shall be required on both sides of a street in all subdivisions and along the perimeter of the subdivision within two years by the developer at which time a reduction in the amount of the letter of credit may be granted. Additionally, six-inch thick concrete with longitudinal #4 reinforcement bars on twelve-inch centers with transverse #4 reinforcement bars on twenty-four-inch centers shall be required at locations where driveways cross sidewalks at the time of driveway construction by the contractor and/or prior to occupancy.

[1] Editor's Note: See Ch. 259, Streets and Sidewalks.

K. Unpaved areas. All unpaved areas within the dedicated street area shall be graded and seeded in an approved manner. The seeding shall be completed prior to acceptance of the streets.

L. Curb corners. All curb comers shall have a minimum radius of not less than 30 feet.

M. Stormwater inlets. Stormwater inlets or outlets and culverts shall be provided within the roadway improvements at points so as to facilitate adequate stormwater runoff from the street pavement. The minimum design and specification for such structure shall be obtained from the Village Engineer.

N. Street name signs. A four-way metal street sign shall be installed at each street intersection. The letters shall be at least 3 1/2 inches high on a green background. The post shall be not less than two inches inside diameter galvanized iron water pipe or equal, 10 feet long. They shall be installed at a height of not less than seven feet and shall be placed not less than one foot nor more than 10 feet from the edge of the pavement.

O. Alleys. The aggregate surface shall be 20 feet wide and in accordance with the street specifications.

P. Pedestrianways. Five-foot wide portland cement concrete walks shall be installed.

Q. Survey monuments. All lot corners shall be marked with steel markers driven so as to be flush with the grade.

R. Public utility easements.

(1) All overhead utility services for telephone, electric service and similar installations shall be placed, insofar as possible, within the rear easement near the lot line for lots less than 43,560 square feet in area.

(2) All underground utility services for telephone, electric, gas and other similar services shall be placed within an easement or dedicated public way so that these utility service lines will not conflict with other underground services. Transformer boxes and similar installations shall be located so as not to be unsightly or hazardous to the public.

§ 263-40 Sewers. [1]

A. Each property or lot shall connect with a public sanitary sewer system, if accessible. A sewer shall be considered to be accessible for extension to a given area anytime after engineering studies have been authorized and completed, and the construction of facilities adequate to serve the area containing the subdivision have been programmed for completion within a reasonable time.

B. Individual sewage disposal systems.

(1) Where no public system is accessible, individual disposal systems shall be provided on each lot. A soil analysis of the soil on each lot shall be performed for determining whether or not the installation of individual private sewage disposal systems is feasible. Such tests shall be performed in accordance with the requirements of the Sangamon County Department of Public Health. The results of these tests shall be made known to the Planning Commission and the Sangamon County Department of Public Health. In the event that individual systems are not feasible, a group sewage disposal system may be required.

(2) Individual sewage disposal systems shall consist of a septic tank and tile absorption field or other approved sewage disposal methods. All such systems shall be constructed in accordance with the Sangamon County Department of Public Health's requirements, as in existence from time to time.

C. Sanitary sewers shall not be used to carry stormwater, surface water, subsurface water or discharge from sump pumps.

D. All principal sanitary sewer lines shall be located within the street right-of-way or public easement.

E. Each lot shall have an individual service line. The service line connection to the main shall be located at the front of the lot. Rear lot service line connections or service lines in excess of 100 feet shall not be permitted without a variance.

[1] Editor's Note: See also Ch. 235, Sewers, and Ch. 301, Water and Sewers.

§ 263-41 Water.

A. Where adequate public water supply is available, as determined by the Planning Commission, the subdivider shall construct a system of water mains not less than six inches in diameter. Water service connections shall be installed to the property line for each lot. When the lots are developed, the improvements shall be connected to the public water system.

B. Each lot line shall have an individual service line. The service line connection to the main shall be located at the front of the lot. Rear lot service line connections or service lines in excess of 100 feet shall not be permitted without a variance.

C. Fire hydrants which should be installed throughout the entire system at intervals of approximately 200 feet radius as a part of the same public water system. All fire hydrants in residential areas and in commercial areas should have at least a six-inch barrel and shall be provided with two 2 1/2 inch hose connections and one steamer connection. All fire hydrants shall meet National Standard specifications and shall be approved by the Village of Williamsville.

§ 263-42 Inspection at subdivider's expense.

All required improvements to be installed under the provisions of this chapter shall be inspected at the subdivider's expense. An Illinois registered professional engineer, approved by the Village Board, as agent for the subdivider or owner, shall conduct an inspection on the job during the process of construction. When the work is completed, the registered professional engineer shall certify to the Village Board of Trustees that the work complies in all respects with the approved plans and specifications. As part of the certification process, the registered professional engineer shall submit two copies of as-built plans to the Village Clerk. The Village Clerk shall retain one copy for his/her records and transmit one copy to the Village Engineer.