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GENERAL DESIGN AND IMPROVEMENT STANDARDS; STANDARDS FOR LOTS
(A) Streets, sanitary sewer systems and water treatment and distribution represent major investments in a community. These improvements should be constructed in such a manner so that they become enduring assets to the community. In order to assure that improvements constructed by a subdivision developer for dedication to the public are resilient, this subchapter sets forth appropriate design and construction standards. The design and improvement standards set forth herein shall be deemed the minimum requirements for public health, safety and general welfare. Nothing contained in this subchapter shall be construed as preventing the subdivider from constructing improvements that exceed these requirements.
(B) (1) No land within the subdivision jurisdiction of the city, other than land that is specifically exempted from the requirements of the Illinois Plats Act (ILCS Ch. 765, Act 205, § l(b)), shall be subdivided or developed except in compliance with the regulations of this subchapter and the applicable provisions of state law (see ILCS Ch. 65, Act 5, § 11-12-8; ILCS Ch. 765, Act 205, §§ 1 et seq.).
(2) No lot in any subdivision shall be conveyed until:
(a) The final plat of the subdivision has been approved by the City Council and recorded with the County Recorder of Deeds; and
(b) The portion of the subdivision of which the lot is located has been improved in accordance with the requirements of this subchapter or until an irrevocable letter of credit or some other acceptable assurance has been posted to warrant the completion of the improvements.
(3) No building permit shall be issued to allow construction on any lot conveyed in violation of this section, and any so issued shall be made invalid by the violation.
(Ord. 2009-21, § 18.5-3-1, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
Land which the City Council determines to be unsuitable for development due to probable flooding, poor drainage, rough topography, adverse soil conditions, being identified as “open space” on the city's “Future Land Use Plan,” or other conditions that, in the opinion of the City Engineer, will prove detrimental to the health, safety and/or general welfare of the future inhabitants of the tract and/or surrounding areas shall not be subdivided or developed unless the developer submits plans and methods that the City Engineer deems adequate to resolve or avoid the problems caused by the adverse land conditions.
(Ord. 2009-21, § 18.5-3-2, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
(A) It is the intent of this chapter and the city to facilitate the design of new subdivisions and developments that are in compliance with the provisions and procedures outlined herein. As such, the city has developed the standard specification plan sheets in § 153.005.
(B) The plan sheets are included in Appendix A and made a part hereof by reference. The city shall make the plan sheets available to all subdividers/developers, who are thereafter encouraged to include them within the construction plans for the proposed development. By doing so, the subdivider/developer can more easily make the requirements of this chapter known to the contractors responsible for the construction and installation of improvements within the development.
(Ord. 2009-21, § 18.5-3-3, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
The planning and development of lots shall be done in such a manner so as to assure compliance with Chapter 154. In order to help achieve this result, every subdivider shall comply with the requirements herein.
(A) All lots in any subdivision within the city shall conform to the minimum lot area and dimension requirements of the zoning district in which the subdivision is located.
(B) All lots in any subdivision outside the city shall conform to the minimum lot area and dimension requirements of the city's zoning district which is most appropriate, as determined by the Administrator of this code.
(C) Land contained with natural lakefront lots that is under water when the lake is at its 100-year pool elevation, or land reserved for street improvements, shall not be counted in determining compliance with minimum lot size requirements.
(D) If possible, the creation of through lots should be avoided in all new subdivisions.
(E) Every corner and through lot shall be large enough to permit compliance with the zoning district's front setback requirement on every side of the lot that faces a street.
(F) All lot remnants shall be added to adjacent lots to avoid the creation of unbuildable or nonconforming parcels.
(G) All side lot lines shall be at right angles to straight street right-of-way lines or radial to curved street right-of-way lines, except where the City Engineer has determined that a deviation from this requirement will provide a street and lot design more beneficial to the city.
(H) All side lot lines of lots which front a cul-de-sac shall be at right angles to the centerline of the cul-de-sac until the point at which the centerline meets the center of the cul-de-sac turnaround. Side lot lines beyond that point shall be radial to the center of the cul-de-sac turnaround except where the City Engineer has determined that a deviation from this requirement will provide a street and lot design more beneficial to the city.
(I) Land contained within the 100-year pool elevation for stormwater detention/retention ponds shall not be counted in determining compliance with minimum lot size requirements.
(Ord. 2009-21, § 18.5-3-4, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
In accordance with “An Act to revise the law in relation to plats,” ILCS Ch. 765, Act 205, §§ 1(a) et seq., as amended from time to time, reference monuments shall be erected by each subdivider as follows.
(A) In the field. Stone or reinforced concrete reference monuments, set in the ground in such a manner that they will not be moved by frost, shall be placed in the field, at opposite corners of the subdivision.
(B) At lot corners.
(1) Every lot corner shall be marked by an iron pin or pipe, at least one-half inch in diameter and not less than 24 inches long, driven into the ground deep enough that they do not protrude above the surface more than one and one-half inches.
(2) No lot in any subdivision shall be sold unless the corners of the lot are marked as specified above at the time of sale.
(C) Front lot corners. Front lot corners abutting a platted street shall be extended to the street and marked in the curb by a saw cut “T” (minimum of one-fourth inch deep and maximum of one-half inch deep) in addition to the lot pins required above.
(Ord. 2009-21, § 18.5-3-6, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
GENERAL STANDARDS FOR STREETS
(A) All grading necessitated for the construction of pavement, curb and gutter, sidewalks, right-of-way and drainage facilities shall be done in such a manner so as to assure a uniform subgrade with adequate bearing capacity to properly support the loading/structures to be superimposed.
(B) All topsoil shall be removed from areas proposed for the construction of pavement, curb and gutter, or sidewalks, and under no circumstances shall the improvements be constructed on topsoil or on any other soil not capable of meeting the specifications for compaction specified herein.
(C) Construction specifications. Work shall be completed according to the following sections in the IDOT Standard Specifications:
(1) Section 201 for clearing;
(2) Section 202 for earth excavation;
(3) Section 204 for borrow and furnished excavation; and
(4) Section 205 for embankment.
(Ord. 2009-21, § 18.5-3-11, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
Subgrade is the unimproved earth below the pavement structure, shoulders, or other appurtenances.
(A) All city streets and sidewalks shall be constructed with a four inch thick minimum layer of granular subgrade beneath the pavement.
(B) Construction specifications. The contractor is responsible to prepare subgrades properly graded to the lines and grades shown on the plans for the given project and according to IDOT Standard Specifications Section 301 except as otherwise noted.
(C) The standard laboratory density shall be the A minimum 95% compaction as determined by ASTM Specifications D-698 for clayey materials and a minimum relative density of 95% as determined by ASTM Specifications D2049 for granular materials.
(D) Compaction shall be achieved with a roller capable of properly compacting the given type of embankment material; in the case of fine-grained soils, a sheepsfoot roller is required.
(Ord. 2009-21, § 18.5-3-12, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
This work shall consist of modifying the subgrade with water and a modifier to increase resiliency.
(A) All city streets shall be constructed with an improved subgrade, which will consist of a 12 inch thick layer of lime, cement modified subgrade, or aggregate granular material as recommended by a geotechnical engineer.
(B) Construction specifications. The contractor is responsible to prepare modified subgrades properly graded to the lines and grades shown on the plans for the given project and according to IDOT Standard Specifications § 302 except as otherwise noted.
(C) Proportioning. If lime or cement modified soil is proposed, a mix design for the proportions of modifier, soil, and water is required. The mix design should be based on actual soil samples and prepared by a geotechnical engineer licensed in the State of Illinois. Modifiers shall be proportioned within a range of 2% to 6% of the weight of soil based on the oven dry basis.
(D) Lime or cement modifiers shall not be applied when wind conditions are such that blowing modifiers become objectionable to adjacent property owners, or creates a hazard to traffic on adjacent highways. In a densely developed area - especially a residential area - the code enforcement official may require lime or cement modifiers be applied in a slurry form to avoid blowing.
(E) A rotary speed mixer is required for tilling the modifier (i.e., lime or cement).
(F) Water and the modifier shall be directly injected into the soil with equipment capable of measuring the application rate to ensure adherence to the mix design.
(G) Substitutions. If subgrade soil modification is impractical, the City Engineer may allow a 12 inch thick granular (i.e., rock) subbase according to § 153.038.
(Ord. 2016-29, passed 11-7-2016)
The subbase is the improved layer constructed on the prepared subgrade below the pavement.
(A) Construction specifications. Where granular subbase is required, the subdivider/developer shall use “subbase granular material, Type A,” conforming to Section 311 - Granular Subbase of the IDOT Standard Specifications except as otherwise noted.
(B) When constructing the subbase, if a soft spot in the soil subgrade is discovered, it shall be undercut to remove the unsuitable soft or spongy areas to the satisfaction of the city. The excavation shall be backfilled with CA-1 aggregate to bring the subject area back up to the subgrade elevation.
(C) To avoid segregation, a suitable spreader box or paver shall be used to place granular subbase.
(Ord. 2009-21, § 18.5-3-14, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
The developer shall be responsible for providing soils testing results to the City Engineer to verify compliance with compaction requirements listed in the IDOT Standard Specifications.
(A) In general, soils tests shall be taken every 200 feet, eight feet off of the centerline; at intersecting streets; and at sag (low) points.
(B) A written report from a registered professional engineer, certifying that soils throughout the embankment and subgrade material uniformly meet the compaction requirements, shall be provided to the city at least 24 hours prior to paving or pouring curb and gutter.
(Ord. 2009-21, § 18.5-3-15, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
All streets under the jurisdiction of the city shall be classified by the city and the classification shall determine the standards to which the streets must be constructed. If the proper classification of any street is unknown, or if a new street is proposed for construction, the city shall review the existing or proposed street and thereafter establish a classification using the criteria listed in § 153.008 for local, collector, and arterial streets, or according to the city’s “Future Land-Use Plan.”
(A) The design of all streets within any subdivision shall be according to the policies outlined in the IDOT Bureau of Local Roads and Street Manual and properly integrated with the city’s street system.
(B) Measurement of pavement width for streets shall be made from back-to-back of the curbs. Measurement of pavement width for alleys, where curbs are not required, shall be from edge to edge.
TABLE 153.040: STREET CLASSIFICATION
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TABLE 153.040: STREET CLASSIFICATION
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Arterial/Industrial | |
Minimum right-of-way width | 80 feet |
Minimum pavement width | 31 to 51 feet (depending on required options) |
Collector (Commercial) | |
Minimum right-of-way width | 70 feet |
Minimum pavement width | 41 to 46 feet (depending on required options) |
Collector (Residential) | |
Minimum right-of-way width | 60 feet |
Minimum pavement width | 36 feet |
Local (Commercial) | |
Minimum right-of-way width | 60 feet |
Minimum pavement width | 34 feet |
Local (Residential) | |
Minimum right-of-way width | 50 feet |
Minimum pavement width | 32 feet |
Local (Residential - R-1E) | |
Minimum right-of-way width | 50 feet |
Minimum pavement width | 20 feet with 2 foot gravel shoulders |
Alley | |
Minimum right-of-way width | 25 feet |
Minimum pavement width | 18 feet |
(C) Profile Grade. Grades of streets shall conform as closely as possible to the natural topography and be between 0.5% (min.) and 8.0% (max). Building sites shall be at least one foot above street grade.
(D) Lane cross-slope. The transverse slope across the driving lanes shall be 1.5% minimum to 2.0% maximum.
(E) Design speed. Arterials shall be designed using a design speed of 45 mph. Commercial collectors shall use a design speed of 40 mph. All other streets will be posted 30 mph.
(F) All streets shall be constructed of Portland cement concrete or hot mix asphalt pavement. The developer may select the pavement type for the City Engineer’s approval.
(G) Construction Specifications. Work shall be completed according to the following sections in the IDOT standard specifications, unless otherwise directed by the City Engineer. Other sections may apply.
(1) Section 407 for hot-mix asphalt pavement.
(2) Section 420 for Portland cement concrete pavement.
(3) Section 424 for Portland cement concrete sidewalk.
(4) Section 606 for concrete gutters, curbs, and medians.
(H) Alleys may be provided in single-family residential districts at the option of the developer, but may be required in other districts in the absence of other provisions for service access.
(1) When provided, alleys shall not intersect with each other or change sharply in alignment.
(2) Adequate vehicular turnaround space shall be provided at the terminus of every dead-end alley.
(Ord. 2009-21, §18.5-3-16, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016; Am. Ord. 2020-15, passed 6-15-2020)
If selecting flexible pavement, all streets and alleys shall be constructed, solely at the expense of the subdivider/developer, in conformance with the requirements set forth in Table 153.042 with the provisions outlined herein, and with the standard specification plan sheets.
(A) Revised pavement design. Should the City Engineer determine that the city's minimum pavement standards are not adequate for a given condition, including, vehicle volume, size of loads, truck volume, subgrade support or drainage, a revised pavement design shall be proposed by the developer's engineer, subject to all provisions and procedures of the current pavement design which remain applicable, and subject to the review of the City Engineer.
(B) Conformance to standards. If required, the revised pavement design shall be according to Section 44-4 of the IDOT “Bureau of Local Roads and Street Manual.”
(C) Bituminous prime coat materials. A bituminous prime coat shall be used on all granular subbases. No hot-mix asphalt shall be placed directly upon a granular subbase. Prime coat shall be according to IDOT Standard Specifications, Section 406.
TABLE 153.041: BITUMINOUS MATERIALS
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Type of Construction | Bituminous Materials |
Prime (tack) on brick, concrete or HMA bases | SS-1, SS-1h, CSS-1, CSS-1h, HFE 90, RC-70, SS-1hP, CS-1hP |
Prime on aggregate bases | MC-30 |
(D) Hot-mix asphalt mixtures. All mixes shall be manufactured in state-based plants and within the tolerance limits of the mixing formula provided by IDOT to the plants for the mixture.
(E) Hot-mix asphalt binder course shall conform to IDOT Standard Specifications, Section 406 and shall conform to the following mix design:
(1) Asphaltic content/ performance grade (AC/PG): PG 64-22;
(2) Thickness (min): overall thickness listed in Table 153.042 exclusive of surface course;
(3) RAP % (max): 10%;
(4) Design air voids: 4.0% at Ndes=70;
(5) Mix composition: IL-19.0; and
(6) Friction aggregate: Mixture “B.”
(F) Hot-mix asphalt surface course shall conform to IDOT Standard Specifications, Section 406 and shall conform to the following mix design:
(1) Asphaltic content/ performance grade (AC/PG): PG 64-22;
(2) Thickness (min): 2 inch;
(3) RAP % (max): 10%;
(4) Design air voids: 4.0% at Ndes=70;
(5) Mix composition: IL - 9.5; and
(6) Friction aggregate: mixture “C.”
(Ord. 2009-21, § 18.5-3-17, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
(A) Hot-mix asphalt pavement shall be laid with a self-propelled paver as specified in Section 407 of the IDOT Standard Specifications to the following thicknesses:
TABLE 153.042: STRUCTURAL COMPOSITION - FLEXIBLE PAVEMENT
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TABLE 153.042: STRUCTURAL COMPOSITION - FLEXIBLE PAVEMENT
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Arterial | |
Overall thickness | 13 inch minimum design based on traffic estimates |
Collector (Commercial) | |
Overall thickness | 10 inch minimum design based on traffic estimates |
Collector (Residential) | |
Overall thickness | 9 inch minimum design based on traffic estimates |
Local (Commercial) | |
Overall thickness | 8 inch minimum design based on traffic estimates |
Local (Residential) | |
Overall thickness | 8 inch minimum |
Local (Residential - R-1E) | |
Overall thickness | 8 inch minimum |
Alley | |
Overall thickness | 6 inch minimum |
(B) The minimum width of any single pass of the spreader/ paver shall be capable of producing a lane width equivalent to Y2 of the roadway width, with no single pass being less than 15 foot-wide in variable width areas such as cul-de-sacs.
(C) The final surface course shall be placed so that following compaction the roadway surface is above the gutter flag by 1/4-inch.
(1) Care shall be taken to assure that the final surface course properly meets drainage grates, manhole frames and valve boxes.
(2) The final surface shall be neat and uniform in appearance.
(Ord. 2009-21, §18.5-3-18, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016; Am. Ord. 2020-15, passed 6-15-2020)
If selecting rigid pavement, all streets and alleys shall be constructed, solely at the expense of the subdivider/developer, in conformance with the requirements set forth in Table 153.044, with the provisions outlined herein, and with the standard specification plan sheets.
(A) Revised pavement design. Should the City Engineer or Administrator of this code determine that the city's minimum pavement standards are not adequate for a given condition, including vehicle volume, size of loads, truck volume, subgrade support or drainage, a revised pavement design shall be proposed by the developer's engineer, subject to all provisions and procedures of the current pavement design which remain applicable, and subject to the review of the City Engineer.
(B) Conformance to standards. If required, the revised pavement design shall be according to Section 44-4 of the IDOT "Bureau of Local Roads and Street Manual".
(C) Concrete admixtures. Concrete admixtures shall conform to Section 1021 - Concrete Admixtures of the IDOT Standard Specifications; provided, however, that chloride based accelerators shall not exceed 0.3% by mass.
(D) Concrete haul time. The maximum haul time for concrete transported in truck mixers or truck agitators shall be in accordance with the following:
TABLE 153.043(D): CONCRETE HAUL TIME
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Concrete Temperature at Point of Discharge | Maximum Haul Time |
50–64°F | 1 hour, 30 minutes |
65–90°F | 1 hour (without retarder) |
65–90°F | 1 hour, 30 minutes (with retarder) |
(E) Portland cement specifications. Portland cement concrete shall be Class PV as specified in Section 1020 - Portland Cement Concrete of the IDOT Standard Specifications.
(F) Pavement reinforcement. For those street classifications in Table 153.044 for which standard reinforcement: wire mesh is required, the subdivider/developer shall use welded wire fabric conforming to AASHTO M 55.
(1) The wire fabric shall be six inches by 12 inches with W4 wire transversely and W6.5 fabric longitudinally.
(2) The fabric shall be lapped 12 inches on the transverse laps and six inches on the longitudinal laps.
(3) Reinforcement shall be placed on the subgrade and supported by proper chairs and spacers prior to paving.
(G) Membrane curing compound.
(1) After the concrete has been finished and immediately after the water sheen has disappeared from the surface of the concrete, the surface shall be sealed with membrane curing compound as approved by IDOT.
(2) Under no circumstances shall polyethylene sheeting be placed on the pavement prior to initial set that would cause marking on the pavement surface.
(H) Load transfer devices.
(1) Dowel bars shall be smooth, plain, round bars conforming to the requirements of AASHTO M-227 grades 70 through 80.
(2) Tie bars (deformed) shall conform to the requirements of AASHTO M-31 Grade 40.
(I) Joint sealer. Joint filling compound shall be rubberized asphalt conforming to the requirements of AASHTO M-173.
(J) Underlayment. When required, underlayment shall be of one-fourth inch thick fabric such as “bidmin,” “Petromat” or equal.
(Ord. 2009-21, § 18.5-3-19, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
(A) Construction specifications. This work shall consist of constructing rigid (Portland cement concrete pavement) according to Section 420 of the IDOT Standard Specifications, except as modified as follows:
(1) The finishing machine shall be of a type approved by the City Engineer, and shall be capable of striking off, consolidating and finishing concrete to the consistency required by the specifications to the proper crown and grade.
(2) A mechanical longitudinal float will not be required.
(3) Hand held fogging equipment capable of spraying a uniform application of membrane curing compound and maintaining constant pressure meeting the approval of the Engineer, will be allowed.
(4) Longitudinal float hand method will be permitted if approved by the City Engineer.
(5) Type A final finish shall be used throughout the project unless directed otherwise by the City Engineer.
(B) Subgrade preparation. Prior to placement of concrete on the subgrade/subbase, the grade shall be checked for proper depth with a template or a string line (if forms are used), or with before and after elevation shots for slip-form work.
(1) Dry subgrades shall be made wet in advance of concrete placement.
(2) Under no circumstances shall concrete be placed on a frozen subgrade.
(C) Pavement thicknesses. Concrete pavement shall be construction to the following thicknesses:
Arterial/Industrial | |
Thickness | 10 inch minimum design based on traffic estimates |
Reinforcement | Wire mesh required |
Traverse joints | 40 foot o.c. with 18 inch long no. 6 dowels every 12 inch o.c. |
Longitudinal joints | 30 inch no. 6 tie bars every 30 inch o.c. |
Collector (Commercial) | |
Thickness | 9 inch minimum design based on traffic estimates |
Reinforcement | Wire mesh required |
Traverse joints | 40 foot o.c. with 18 inch long no. 6 dowels every 12 inch o.c. |
Longitudinal joints | 30 inch no. 6 tie bars every 30 inch o.c. |
Collector (Residential) | |
Thickness | 8 inch minimum design based on traffic estimates |
Reinforcement | None |
Traverse joints | 15 foot un-dowled transverse contraction joints |
Longitudinal joints | 30 inch no. 6 tie bars every 30 inch o.c. |
Local (Commercial) | |
Thickness | 8 inch minimum design based on traffic estimates |
Reinforcement | None |
Traverse joints | 15 foot un-dowled transverse contraction joints |
Longitudinal joints | 30 inch no. 6 tie bars every 30 inch o.c. |
Local (Residential) | |
Thickness | 8 inch minimum |
Reinforcement | None |
Traverse joints | 15 foot un-dowled transverse contraction joints |
Longitudinal joints | 30 inch no. 6 tie bars every 30 inch o.c. |
Alley | |
Thickness | 7 inch minimum design based on traffic estimates |
Reinforcement | None |
Traverse joints | 15 foot un-dowled transverse contraction joints |
Longitudinal joints | 30 inch no. 6 tie bars every 30 inch o.c. |
(D) Placement and finishing. Plastic Portland cement concrete shall be deposited on the grade in successive batches as a continuous operation and in such a manner so as to require a minimal amount of rehandling or segregation.
(1) No batch/load shall be incorporated that has been in the truck longer than the maximum allowed haul time, as stated herein.
(2) The operation shall be coordinated in such a manner so as to have the mixture struck off and consolidated within 30 minutes of being deposited on grade.
(3) The finishing floats shall be passed across the entire surface a minimum of two times with an overlap of 50% between successive locations along the pavement.
(E) Straightedge testing.
(1) After the operation of the slip-form paver, the finishing machine or the longitudinal float, but while the concrete is still plastic, the pavement surface shall be tested with a ten-foot straightedge.
(a) High areas shall be cut down and refinished with a five-foot float.
(b) The corrected area shall be checked again with the ten foot straightedge.
(2) The straightedge shall be held in successive positions parallel to the pavement centerline in contact with the surface.
(F) Pavement joints.
(1) All pavement joints shall be according to the standard details.
(2) All bars shall be epoxy coated.
(3) All joints (transverse or longitudinal) shall be sealed with an approved hot-pour joint sealer according to Sections 451 and 452 of the “Standard Specifications for Road and Bridge Construction,” except the crack sealant shall be Crafco Sealant or approved equal according to ASTM D5167.
(a) Prior to traffic being allowed on newly placed concrete pavement, all sawed joints are to be thoroughly cleaned of all foreign material, including membrane curing compound prior to sealing operations.
(b) The joint faces shall be clean and surface dry when the seal is applied.
(4) Contraction joints.
(a) Transverse construction joints.
1. All transverse construction joints shall be formed by means of a suitable header, accurately set and securely held in place in a plane perpendicular to the surface of the pavement.
2. All transverse construction joints shall be “tied” with no. 6 deformed bars, 30 inches long, spaced at 24-inch centers.
(b) Longitudinal construction joint. When adjacent lanes of pavement or pavement and curb and gutter are constructed separately, the subdivider/developer shall install epoxy-coated deformed steel tie bars across the longitudinal construction joint, as detailed in the standard specification plan sheets, in order to tie the lanes together.
1. The epoxy coated tie bars shall be installed in preformed or drilled holes along the vertical edge of the first pour, using an approved non-shrink grout or chemical adhesive to provide a minimum pull requirement of 11,000 lbs. for no. 6 bars.
2. As an option, a trapezoidal metal joint type C (preformed keyway) as specified by IDOT and shown in the standard specification plan sheets may be utilized in lieu of tie bars.
(c) Construction joints must be at least five feet from a contraction joint.
(5) Sawed joints.
(a) Longitudinal sawed joint. The developer shall install longitudinal joints along the centerline of two lane pavements, assuring that the joints are no closer than eight feet or farther than 15 feet apart according to the standard details.
(b) Transverse sawed contraction joints. The developer shall install transverse sawed contraction joins, consisting of planes of weakness created by cutting grooves in the surface of the pavement as specified in the standard drawings. Where specified in Table 153.044, load transfer devices consisting of dowel bars supported on an approved dowel bar assembly shall be provided.
(c) The joints shall be sawed within 24 hours of concrete placement or as soon as the concrete has hardened sufficiently to permit sawing without excessive raveling.
(6) Expansion joints.
(a) To prevent street creep, type A3 four-inch seamless rubber expansion joints shall be installed as depicted on Standard Specifications Plan Sheet T-2A.
(b) Expansion joints at driveways, entrances and the like. All entrances, driveways and accessways where concrete abuts the pavement or curb and gutter shall be provided with a 3/4-inch thick pre-molded expansion joint at the interface of the street pavement (or back of curb) and driveway pavement, entrance pavement or accessway pavement. In addition, a 3/4-inch expansion joint shall be provided at all interfaces between the driveway or entrance pavement and proposed residential or commercial structure.
(G) Curing procedures. Following the application of the finished texture, and as soon as possible without marring the surface, the pavement shall be coated with membrane curing compound as required.
(1) In doing so the contractor shall ensure that adequate and uniform coverage is achieved.
(2) Two separate applications applied at least one minute apart, each at the rate of not less than one gallon per 250 square feet will be required upon the surface.
(3) Type III compound shall be agitated immediately before and during the application.
(4) Membrane curing is not permitted where a protective coat or waterproofing is to be applied, or at any area where rubbing or a normal finish is required, or at construction joints other than those necessary in pavement or base course.
(5) Curing shall be maintained for a minimum of 72 hours.
(H) Cold weather protection. When the National Weather Bureau forecast for the construction area predicts a temperature of 32°F or lower, or if the actual temperature drops below 32°F or lower, concrete less than 72 hours old shall be protected in the following manner:
(1) If the temperature is predicted to fall or falls to 25°F to 32°F, protection shall consist of two layers of polyethylene sheeting or one layer of polyethylene and one layer of burlap, or two layers of waterproof paper.
(2) If the temperature is predicted to fall or falls below 25°F, protection shall consist of six inches of straw covered with one layer of polyethylene sheeting or waterproof paper placed after initial set of the concrete.
(I) Traffic restriction. Traffic shall be restricted on newly placed concrete streets by barricades and appropriate signs for a period of 14 days, provided that the City Engineer may increase the time period depending upon site location and conditions such as weather.
(J) Protective coat.
(1) Whenever pavement is constructed after October 15 and it will be opened to traffic prior to the following April 15, or whenever directed to do so by the City Engineer or Administrator, the subdivider/developer shall apply a protective surface treatment consisting of two coats of boiled linseed oil mixture to the surface of the pavement and all appurtenances.
(2) The protective coat shall conform to Section 1023 - Protective Coat of the IDOT Standard Specifications, and is to be applied when the concrete is at least 14 days old and before the pavement is opened to traffic.
(Ord. 2009-21, § 18.5-3-20, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
It is the intent of this section to establish minimum quality control requirements for Portland cement concrete construction used in areas other than pavement, in order to assure durable and functional installations that are workmanlike in appearance.
(A) Mix proportions. Portland cement concrete to be used for the construction of structures such as sidewalks, paved ditches, drainageways and medians, and shall conform to the specific mix design criteria as listed Table 153.045 below.
(B) Concrete admixtures.
(1) Concrete admixtures shall conform to Section 1201 - Concrete Admixtures of the IDOT Standard Specifications.
(2) Calcium chloride shall not be added to concrete mixtures except during cold weather construction, and at that time shall not exceed 2%.
TABLE 153.045: PORTLAND CEMENT CONCRETE SPECIFICATIONS
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TABLE 153.045: PORTLAND CEMENT CONCRETE SPECIFICATIONS
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All Non-Pavement Areas IDOT Class of Concrete | SI |
Mix Design: | Type I, Cement |
Minimum Compressive Strength: | 3,500 psi |
Minimum Flexural Strength: | 650 psi |
Coarse Aggregates Permitted: | CA-7 and CA-11 |
Or | CA-14 |
* Slump in inches: | 2 in. to 4 in. |
Air Content: | 5–8% |
Cement Factor (cwt/c.y.): | 6.05 |
* A slump above the maximum specified may be used with the City Engineer’s approval, up to a maximum of 3 inches provided the water/cement ratio does not exceed 0.42 | |
(C) All Portland cement concrete shall be placed in an acceptable and workmanlike manner and at such a consistency that the plastic mixture is workable but does not exceed the slumps stated herein.
(1) No batch/load shall be incorporated that has been in the truck longer than the maximum allowed haul time, as stated in § 153.043(D).
(2) The mixture shall be properly consolidated by vibrator or spading prior to or concurrently with the strike-off operation.
(3) All concrete shall be worked sufficiently to bring one-eighth inch to one-fourth inch of mortar to the surface to allow for proper finishing.
(4) Care shall be exercised to avoid segregation of the mixture.
(D) Subgrade. Under no circumstances shall concrete be placed on a spongy or frozen subgrade.
(E) Forms.
(1) Forms shall be of wood or metal, straight and free from bend or warp, and be clean and securely staked and braced prior to placement of concrete in order to prevent vertical movement during placement and finishing operations.
(2) Forms may deviate from true straightness over a ten-foot length no more than three-eighths inch horizontally or one-fourth inch vertically, as determined with a string line.
(F) Finished texture. Subsequent to initial set, and prior to hardening of the surface, the concrete shall be given a broomed finish at right angles to the centerline of the road, or to the flow line, so that the surface is indented to a nominal depth of one-sixteenth inch.
(G) Curing procedures. Following the application of the finished texture, and as soon as possible without marring the surface, the pavement shall be coated with membrane curing compound as required.
(1) In doing so the contractor shall ensure that adequate and uniform coverage is achieved.
(2) Two separate applications applied at least one minute apart, each at the rate of not less than one gallon per 250 square feet will be required upon the surface.
(3) Type III compound shall be agitated immediately before and during the application.
(4) Membrane curing is not permitted where a protective coat or waterproofing is to be applied, or at any area where rubbing or a normal finish is required, or at construction joints other than those necessary in pavement or base course.
(5) Curing shall be maintained for a minimum of 72 hours.
(H) Cold weather protection. When the National Weather Bureau Forecast for the construction area predicts a temperature of 30°F or lower, or if the actual temperature drops below 32°F or lower, concrete less than 72 hours old shall be protected in the following manner:
(1) If the temperature is predicted to fall or falls to 25°F to 32°F, protection shall consist of two layers of polyethylene sheeting or one layer of polyethylene and one layer of burlap, or two layers of waterproof paper.
(2) If the temperature is predicted to fall or falls below 25°F, protection shall consist of six inches of straw covered with one layer of polyethylene sheeting or waterproof paper.
(Ord. 2009-21, § 18.5-3-21, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)
All streets shall be constructed with curbs and guttering of Portland cement concrete. Exception: The construction of curbs and guttering along streets classified as Local (Residential - R-1E) and as permitted in the Single-Family Residential R-1E zoning district shall not be required.
(A) Those streets classified as arterial, industrial, or collector commercial, shall be constructed with a vertical combination curb and gutter in accordance with the standard specification plan sheets, the dimensions depicted thereon and the IDOT Standard Specifications.
(B) Those streets classified as alley, local residential or collector residential shall be constructed with a mountable curb and a V-type gutter in accordance with the standard specification plan sheets, the dimensions depicted thereon, and the IDOT Standard Specifications.
(C) (1) Curb and/or gutter may be constructed either integrally or separately in conjunction with Portland cement concrete pavement.
(2) If constructed separately, the gutter flag shall be “tied” to Portland cement concrete pavement with no. 6 reinforcing bars at least 24 inches long and spaced at 24-inch centers.
(D) (1) Contraction joints and expansion joints shall be installed in the curb, or curb and gutter, in prolongation with joints in adjacent Portland cement concrete pavement or base course, except that dowel bars shall not be required in contraction joints.
(2) Contraction joints, when sawed or template formed, shall be sealed according to § 153.044.
(E) (1) When curb and gutter is constructed adjacent to flexible pavement, a one-inch expansion joint shall be installed at points of curvature for short-radius curves and at construction joints.
(2) Contraction joints shall be placed between expansion joints at distances not to exceed 25 feet.
(F) (1) All expansion joints shall be constructed with a minimum one-inch thick performed expansion joint filler conforming to the cross section of the curb and gutter, and shall be provided with a one and one-fourth-inch diameter by 18-inch long, coated smooth dowel bar conforming to standard specifications.
(2) The dowel bar shall be fitted with a cap having an inched stop that will provide a minimum one inch of expansion.
(3) All expansion joints shall be sealed according to § 153.044.
(G) Construction joints constructed in curb and gutter adjacent to Portland cement concrete pavement and Portland cement concrete base course, shall be provided with no. 6 deformed steel tie bars at least 30 inches long, and placed on nine-inch or more centers with a minimum of two bars per joint.
(Ord. 2009-21, §18.5-3-22, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016; Am. Ord. 2020-15, passed 6-15-2020)
Along streets classified as Local (Residential - R-1E) and as permitted in the Single-Family Residential R-1E zoning district, a drainage swale, ditch or channel with a vegetative lining may be used for conveyance of stormwater runoff when approved in advance by the City Engineer. Such ditches shall be designed as a stable trapezoidal or parabolic channel with a suitably protective vegetation lining to slow down concentrated runoff and prevent erosion.
(Ord. 2020-15, passed 6-15-2020)
DESIGN STANDARDS
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