06- 2402 OK Mine Standard Specifications Final~1.pdf

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ILLINOIS DEPARTMENT OF NATURAL RESOURCES (IDNR)

PROJECT REQUIREMENTS & SPECIFICATIONS

Project Name: OK Mine Project Number: AML-BScE-2402 Project Location(s): 451 White Oak Mine RD Marissa, IL 62257

PROJECT NARRATIVE:

O.K. Mine 200 Grant Project Environmental Narrative Abandoned Mine Division This abandoned mine site is located less than one-half mile southeast of Marissa in St. Clair county.

The site is readily visible and easily accessible as it lies adjacent to the edge of White Oak Mine Road. White Oak Mine Road passes a recreation area containing numerous ball fields before bending around the mine site. The Marissa O.K. Mine opened in 1885 and operated until April 7, 1952 (4/7/1952 Inspectors ledger). The ISGS mine index number is S-8. The mine sank a shaft 116 feet deep to reach the 7-8 foot thick No.6 Herrin coal seam. Problems at this site were first inventoried in 1981. It was recorded that gob sediment continually clogged the adjacent roadside ditches and they had been recently excavated by road personnel.

Presently, it appears that the site is still of source of sediment which is obstructing flow in the ditches. The 3 acres of refuse does support some weedy vegetation although a large percentage is covered with either gravel or junk. A second problem that has developed is a settled opening on the east edge of the site. According to the mine working map it appears that this settlement is in the area of the air shaft for the mine. The foundation and motor mount for the main shaft are still present in the center of the site. The motor mount is on the north side of the concrete shaft collar which shows signs of settling in its northwest corner. The mine had other names, Marissa O.K. (1937-48), O.K. Coal Co., Egyptian Coal Mining Co. "O.K.", Victoria Coal Co. "O.K.", Johnson Coal Co. "O.K.".

SCOPE OF WORK:

Reclamation will consist of excavation of the main shaft and the air shaft to install a concrete plug to seal them. Concrete pad and other concrete items to be buried in a pit onsite. Mine refuse to be removed and buried under good soil on site, with limestone added in between.

Appendix A contains the plans for this project.

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Project Requirements:

CONSTRUCTION PROJECT SIGN

A project construction sign will be furnished and installed by the Contractor prior to commencement of work at the site. The location, text and construction details for the sign are shown on the plans. Furnishing, erecting, and removal of the sign shall be the responsibility of the Contractor and considered incidental to the contract.

EXISTING PAVEMENTS

Existing on-site roadways may be used for construction traffic. The Contractor shall provide temporary additional roads needed for required construction access, maintain existing roads throughout construction, and restore to original or better condition at completion of work.

BASE AND TOPPING MATERIALS

For temporary construction which will be removed when no longer needed for construction purposes, and all affected areas restored to original or better condition at the completion of work, the selection of these materials is at the Contractor's option, unless otherwise specified.

FIELD ENGINEERING

The Contractor shall provide and pay for all field engineering services required for the project, including:

1. Lay-out and field stake the project’s construction limits, unless otherwise specified on the plans, to the satisfaction of the Engineer.

2. Survey work required in execution of the project.

3. Civil, structural or other professional engineering services specified, or required to execute the Contractor's construction methods.

Records:

The Contractor shall maintain complete, accurate records, computations and field books of all control and survey work as it progresses. These shall be kept on-site for use of and reference by the Engineer.

OWNER OCCUPANCY

Owners will occupy premises during entire construction period for conduction of their normal operations. The Contractor shall cooperate with Owners in scheduling operations to minimize conflict and to facilitate Owner's usage.

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Project Specifications:

Those Sections and Articles of the "Standard Specifications for Road and Bridge Construction," adopted January 1, 2022, by the Illinois Department of Transportation (IDOT); as amended and supplemented by the "Supplemental Specifications and Recurring Special Provisions," adopted January 1, 2025 (hereinafter referred to collectively as "Standard Specifications"), that are referenced in these bid documents are incorporated by reference. (The Standard Specifications are available on-line at IDOT’s web site or can be purchased from IDOT.)

In the application of the Standard Specifications to this Contract, references to the Department of Transportation shall be interpreted to mean the Illinois Department of Natural Resources;

Office of Mines and Minerals; Abandoned Mined Lands Reclamation Division (AMLRD).

The specification governing the contract pay items are indicated in the Summary of Quantities of Drawing Sheet 2 of 6. The following Sections of the IDOT Standard Specifications govern contract work at on this project:

SECTION 105 – Control of Work SECTION 250 – Seeding Class 1B SECTION 251 – Mulch SECTION 402 – Aggregate Surface Course, Type B

The following Sections of the IDOT Standard Specifications have been modified for this project by the AMLRD and are included below and on the following pages and govern contract work at or on this project:

SECTION 101 - Definition of Terms SECTION 107 – Legal Regulations and Responsibility to Public SECTION 201 – Special Clearing SECTION 202 – Earth and Rock Excavation SECTION 205 – Mine Site Compaction SECTION 215 – Special Excavation SECTION 216 – Mine Opening Filling and Sealing SECTION 255 – Mine Refuse Treatment SECTION 258 – Mowing SECTION 280 – Temporary Erosion and Sediment Control SECTION 501 – Removal of Existing Structures SECTION 666 – Mine Opening Markers SECTION 671 – Mobilization

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AMLRD SUPPLEMENTAL SPECIFICATION FOR

SECTION 101. DEFINITION OF TERMS

Whenever in these specifications or in other contract documents the following terms or pronouns in place of them are used, the intent of meaning shall be interpreted as follows:

101.03 Award. Revise as indicated:

The decision of the Illinois Department of Natural Resources; Office of Mines and Minerals;

Division of Abandoned Mined Lands Reclamation to accept the proposal of the lowest responsible bidder for the work, subject to the execution and approval of a satisfactory contract therefore and bond to secure the performance thereof, and to such other conditions as may be specified or otherwise required by law.

101.14 Department. Revise as indicated:

The Department of Natural Resources of the State of Illinois with its principal offices of business at Springfield.

101.16 Engineer. Revise as indicated:

The Director of the Department of Natural Resources of the State of Illinois; or his authorized representative limited by the particular duties entrusted to him.

101.35 Right of Way. Revise as indicated:

Right of way shall be replaced by construction limits, except when used in conjunction with right of way markers or highways.

101.39 Roadway. Revise as indicated:

Roadway shall be replaced by site. Slope limits of embankments will be replaced by proposed lines and grades.

101.56 Gob. Add the following:

Coarse textured mine waste material, generally acidic, from a coal cleaning process. This material is composed of rock, shale, pyritic material and varying amounts of coal. The material varies considerably in its moisture content, texture, stable angle of repose and bearing capacity.

101.57 Mine Spoil. Add the following:

A mixture of various soil and rock material as a result of the removal of overburden to expose the coal in surface mining. The material varies considerably in its' moisture content, texture, stable angle of repose and bearing capacity.

101.58 Slurry. Add the following:

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A mixture of coal fines and fine coal waste material resulting from a coal cleaning process. This material is composed of water, silts, clays, pyritic material and coal. The material varies considerably in its' moisture content, stable angle of repose, shear strength and bearing capacity.

End of Revisions to SECTION 101.

SECTION 107. LEGAL REGULATIONS AND RESPONSIBILTY TO PUBLIC

Article 107.27 Insurance. (delete and replace with the following)

The Contractor shall obtain and thereafter keep in force the following insurance coverage provided by insurance companies acceptable to the Department and authorized to transact business under the laws of the State of Illinois. The insurance companies providing coverage shall be rated in the Best's Key Rating Guide. The Department will accept companies with a rating not lower than B+ provided the financial size category is VII or larger. Companies rated A- or better shall have a financial size category of not less than VI. Coverage limits shall be written at not less than the minimum specified in this Article. Higher minimum limits and additional coverage may be specified by a special provision elsewhere in the contract. Whether stated in this Article or elsewhere, the Department does not warrant the adequacy of the types of insurance coverage, or the limits of liability specified.

(a) Workers Compensation and Employers Liability.

(1) Workers’ compensation shall be provided in accordance with the provisions of the Illinois Worker's Compensation Act, as amended. Notwithstanding the rating and financial size categories stated in this Article, coverage may be provided by a group self-insurer authorized in Section 4(a) of the Act and approved pursuant to the rules of the Illinois Department of Insurance.

(2) Employers Liability

a. Each Accident $500,000

b. Disease - policy limit $500,000

c. Disease - each employee $500,000

(b) Commercial General Liability.

Required liability insurance coverage shall be written in the occurrence form and shall provide coverage for operations of the Contractor; operations of Sub-Contractors (contingent or protective liability); completed operations; broad form property damage and hazards of explosion, collapse and underground; and contractual liability. The general aggregate limit shall be endorsed on a per project basis.

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(1) General Aggregate Limit $2,000,000

(2) Products - Completed Operation Aggregate Limit $2,000,000

(3) Each Occurrence Limit $1,000,000

The coverage shall provide by an endorsement in the appropriate manner and form, the Department, to its officers, agents and employees shall be named as additional insureds with respect to the policies and any umbrella excess liability coverage for occurrences arising in whole or in part out of the work and operations performed. The Department may accept a separate owner's protective liability policy in lieu of the Department, its officers, and employees being insured on the Contractor's policy.

(c) Owners and Contractor’s Protective (OCP) Liability.

The Contractor shall provide an OCP policy covering the property owner(s) of the site where the work is to be performed. In the case of multiple owners, all the landowners may be listed as additional insurers on the same policy.

This project will require OCP Policy coverage for _1_ property owners.

If the Contractor chooses to put the Department on an OCP (in lieu of placing the Department as an additional insured on the Commercial General Liability - see (b) above), then the Department should be listed as the insured, with all landowners listed as additional insured(s). The amounts of insurance shall be as follows:

BODILY INJURY LIABILITY PROPERTY DAMAGE LIABILITY

Each Occurrence Each Occurrence Aggregate $1,000,000 $500,000 $1,000,000 or

COMBINED SINGLE LIMIT $1,000,000

The required OCP policy shall contain the following endorsement:

"Each named insured shall be provided full coverage under this policy without regard to the fact that such named insured is not in contractual privity with the Contractor. It is understood that the construction operations are performed for and on behalf of the Department, with the consent of the property owner(s)-insured(s). Coverage under this policy with respect to liability arising out of operations shall not be denied to any named-insured because of his passive relationship to the Contractor".

When any named insured is a corporation, insurance coverage under the OCP policy shall extend to the Corporation, its officers, agents, and employees.

(d) Commercial Automobile Liability.

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The policy shall cover owned, non-owned and hired vehicles.

BODILY INJURY & PROPERTY DAMAGE LIABILITY

Each Occurrence $1,000,000

(e) Umbrella Liability.

Any policy shall provide excess limits over and above the other insurance limits stated in this Article. The Contractor may purchase insurance for the full limits required or by a combination of primary policies for lesser limits and remaining limits provided by the umbrella policy.

When work is to be performed within railroad right-of-ways, the requirements of Article 107.11 of the Standard Specifications will also apply.

All insurance shall remain in force during the period covering occurrences happening on or after the effective date and remaining in effect during performance of the work and at all times thereafter when the Contractor may be correcting, removing or replacing defective work until notification of the date of final inspection. Termination or refusal to renew shall not be made without 30 days prior written notice to the Department by the insured(s) and the policies shall be endorsed so as to remove any language restricting or limiting liability concerning this obligation.

Certified copies of the original policies or certificate(s) of insurance by the insurer(s) issuing the policies and endorsements setting forth the coverage, limits and endorsements shall be filed with the Department before the Department will execute the contract. A certificate of insurance shall include a statement that, "the coverage and limits conform to the minimums required by Article

107.27 of the Standard Specifications for the Road and Bridge Construction". Any exception or deviation shall be brought to the attention of the Department for a ruling of acceptability. In no event shall any failure of the Department to receive polices or certificates or to demand receipt be construed as a waiver of the Contractor's obligation to obtain and keep in force the required insurance.

All costs for insurance as specified herein will be considered as included in the cost of the contract. The Contractor shall, at its own expense and risk of delay, cease operations if the insurance required is terminated or reduced below the required amounts of coverage. Coverage in the minimum amounts set forth herein shall not be construed to relieve the Contractor from its obligation to indemnify in excess of the coverage in accordance with the contract.

End of Revisions to SECTION 107

DIVISION 200 - EARTHWORK, LANDSCAPING, EROSION CONTROL

SECTION 201: CLEARING, TREE REMOVAL AND PROTECTION CARE AND REPAIR OF EXISTING PLANT MATERIAL (revise and add the following as indicated)

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Article 201.01 Description - (add the following)

(f) Trash and Debris Removal -- Trash and debris removal shall consist of the removal and disposal of all trash and debris that is within the area to be graded inside the construction limits to an approved landfill off-site.

Article 201.09 Disposal of Materials - (delete and replace with the following)

The Contractor, at his/her own expense, shall dispose of all surplus, unstable and unsuitable materials, including those which result from the work included in Section 201 and 501 of these Special Provisions, and Section 440 of the Standard Specifications in such a manner that public or private property will not be damaged or endangered.

Whenever possible, stones and boulders naturally occurring within the construction limits shall be placed in fills or embankments in layers and compacted. Broken concrete without protruding metal bars, bricks, rock, stone, or uncontaminated dirt or sand generated from construction or demolition activities shall be disposed of off-site in a location approved by the Engineer. All other construction and demolition debris or waste shall either be disposed of in a licensed landfill, or recycled, reused, or otherwise disposed of as allowed by State or federal solid waste disposal laws and regulations and solid waste determinations of the Illinois Environmental Protection Agency

(IEPA).

Organic waste (i.e., plant refuse resulting from pruning or removal of trees or shrubs), or other construction debris shall be removed from the site and disposed of as allowed by State or federal solid waste disposal laws and regulations and solid waste determinations of the Illinois Environmental Protection Agency (IEPA). Organic waste originating within the construction limits may NOT be left on-site.

Surplus excavated material, including unstable and unsuitable soils, shall be disposed of by the Contractor outside of the construction limits in a location approved by the Engineer. These materials shall be placed or disposed of by the Contractor at his/her own expense.

Article 201.10 Method of Measurement - (delete paragraphs (b) through (d) and replace with the following)

All Clearing, Tree Removal, Protection of Existing Plant Material, Care of Existing Plant Material and Trash and/or Debris Removal that is necessary to perform the grading work within the construction limits shall be classified as SPECIAL CLEARING and will not be measured for payment.

Any of these items associated within the designated areas of Special Excavation shall not be considered here, but shall be covered under Section 215 - Special Excavation.

Any special areas of trees within the construction limits to be preserved will be specified in the plans and shall not be removed unless approved by the Engineer.

All trees outside the construction limits shall not be disturbed.

Article 201.11 Basis of Payment - (delete all and replace with the following)

All Tree Removal, Protection of Existing Plant Material, Care of Existing Plant Material and Trash/Debris Removal within the construction limits shall be paid for at the contract lump sum

Page | 9 price for SPECIAL CLEARING. No payment for any of the items associated within the limits of Special Excavation will be made. Payment for those shall be in accordance with Section 215 -

SPECIAL EXCAVATION.

End of Revisions to SECTION 201: CLEARING, TREE REMOVAL AND PROTECTION CARE AND REPAIR OF

EXISTING PLANT MATERIAL

SECTION 202: EARTH AND ROCK EXCAVATION

SECTION 202: ABANDONED MINE SITE EXCAVATION (delete entire section and replace with the following)

Article 202.01 Description

Abandoned mine site excavation shall consist of the excavation, removal, placement, and satisfactory disposal of materials taken from within the construction limits for the reshaping and disposal of mine refuse; the covering of mine refuse with soil; the construction of embankments, ditches, waterways, entrances, field roads and incidental work.

CONSTRUCTION REQUIREMENTS

Article 202.02 Clearing, Tree Removal, Hedge Removal

Prior to starting excavation operations in any area, all clearing, tree removal, hedge removal and trash and debris removal in that area shall be performed according to SECTION 201.

Article 202.03 Removal and Disposal of Surplus, Unstable and Unsuitable Materials and Organic Waste

The Contractor, at his/her own expense, shall dispose of all surplus, unstable and unsuitable materials, including those which result from the work included in SECTIONS 201, 440, and 501 in such a manner that public or private property will not be damaged or endangered.

Whenever possible, stones and boulders naturally occurring within the construction limits shall be placed in fills or embankments in layers and compacted, in accordance with SECTION 205.

Broken concrete without protruding metal bars, bricks, rock, stone, or uncontaminated dirt or sand generated from construction or demolition activities may be used in embankment or in fill.

These materials shall be placed as approved by the Engineer; shall be compacted to the satisfaction of the Engineer; shall be buried a minimum of 3 ft (900 mm) below finished grade unless specified otherwise in the plans (except when the materials include only uncontaminated dirt and sand); and shall not create an unsightly appearance or detract from the natural topographic features of an area. Broken concrete without protruding metals bars, bricks, rock, or stone may be used as riprap as approved by the Engineer. If the materials are used for fill in locations within the mine site but outside project construction limits the Contractor must specify to the Engineer, in writing, how the landscape restoration of the fill areas will be accomplished.

Placement of fill in such areas shall not commence until the Contractor's landscape restoration plan is approved by the Engineer.

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Aside from broken concrete without protruding metal bars, bricks, rock, stone, or uncontaminated dirt or sand used in embankment, for fill, or for riprap, as appropriate, all other construction and demolition debris or waste shall either be disposed of in a licensed landfill, or recycled, reused, or otherwise disposed of as allowed by State or Federal solid waste disposal laws and regulations, and solid waste determinations of the Illinois Environmental Protection Agency

(IEPA).

A permit shall be obtained from the IEPA and made available to the Engineer prior to open burning of organic waste (i.e. plant refuse resulting from pruning or removal of trees or shrubs) or other construction or demolition debris available to the Engineer. Organic waste originating within the construction limits may be left on-site for use by the landowner, stockpiled for use as wildlife habitat, as determined by the Engineer, in locations designated by the Engineer. When landscape plantings are included in the project, organic waste originating within the construction limits may be chipped or shredded and placed as mulch around landscape planting within the construction limits when approved by the Engineer. Chipped or shredded material to be placed as mulch shall not exceed a depth of 6 in. (150 mm).

When specified, surplus excavated material, including excavated stable and suitable material from special excavation, sewer trenches or other underground construction, shall be used to increase soil cover thickness, construct embankments, flatten slopes, or be disposed of otherwise within the project construction limits as approved by the Engineer. Surplus excavated material shall not be disposed of by the Contractor outside of the construction limits.

All unstable and unsuitable material, including excavated material from special excavation, sewer trenches, or other underground construction shall be excavated or removed and replaced with material acceptable to the Engineer. Unstable and unsuitable material shall not be used in embankments. If unsuitable material is present at or below the finished grade, it shall be removed and replaced with suitable material, in accordance with Articles 205.04 and 205.05. Unsuitable material shall be placed or disposed of by the Contractor at his/her own expense outside of the construction limits as specified herein.

Article 202.04 Grading the Site

The Contractor shall excavate earth materials to the lines, grade, cross-sections and elevations shown on the plans or designated by the Engineer. Mine refuse shall be graded, hauled to, and/or incorporated into the configuration as shown on the plans. Cover material shall be graded, excavated, hauled, and/or placed to the configuration as shown on the plans. Cover material shall be uniformly spread in layers not to exceed nine inches individually to the total depth specified in the plans. All mine refuse, grading, and/or excavation shall be completed prior to applying cover material.

The mine refuse is to be excavated to the lines, grade, cross-sections and elevations shown on the plans or designated by the Engineer. If mine refuse remains below those lines, grade, cross-sections and elevations and was not specified for soil cover on the plans or by the Engineer, then after receiving written approval of the Engineer the Contractor shall excavate the remaining mine refuse to a depth of 2 ft (600 mm) below the adjacent proposed grade or to soil, which ever occurs first. The area affected by the additional mine refuse excavation shall be backfilled with soil to original plan proposed grade or to the lines, grades, elevations specified by the Engineer. All

Page | 11 additional mine refuse excavation and earth excavation necessary due to encountering these conditions will be paid for at the contract unit price for Earth Excavation and Mine Refuse Excavation as described herein.

Article 202.05 Classification

Abandoned mine site excavation shall be classified as earth excavation or mine refuse excavation.

(a) Earth Excavation - Excavation of any earth materials except mine refuse as defined in Articles 101.56 and 101.58.

(b) Mine Refuse Excavation - All excavation of mine refuse materials as defined by Articles

101.56 and 101.58.

Article 202.06 Construction of Ditches and Waterways

Ditches and waterways shall be constructed and maintained to the lines, grades and cross-sections shown on the plans. Ditches and waterways so constructed shall be kept free from debris until acceptance. All suitable materials excavated from inlet, outlet and intercepting ditches, and waterways within the construction limits shall be used for cover soil as far as practicable. Roots, stumps and other objectionable material in the slopes or bottoms of ditches shall be removed and the holes backfilled with suitable material.

Article 202.07 Drainage

The site shall be maintained so that it will be well drained at all times. If, during the prosecution of the work, it is necessary to interrupt existing sewer or under drainage, temporary drainage facilities shall be provided until the permanent drainage work has been completed. Such temporary drainage facilities will be paid for in accordance with the provisions of Article 109.04, unless otherwise provided for in the contract.

The Contractor shall be responsible for, and shall take all necessary precautions to preserve and protect all existing tile drains, sewers and other sub-surface drains or parts thereof which may be affected by his operations, and which may be continued in use without change. He shall repair, at his own expense, any and all damage to such drainage facilities resulting from negligence on his part.

Article 202.08 Method of Measurement

(a) Contract Quantities:

When the project is constructed essentially to the lines, grades or dimensions shown on the plans and the Contractor and the Engineer have agreed in writing that the plan quantities are accurate, no further measurement will be required and payment will be made for the quantities shown in the contract for the various items involved except that if errors are discovered after work has been started, appropriate adjustments will be made.

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When the plans have been altered or when disagreement exists between the Contractor and the Engineer as to the accuracy of the plan quantities, either party shall, before any work is started which would affect the measurement, have the right to request in writing and thereby cause the quantities involved to be measured as hereinafter specified.

(b) Measured Quantities:

Earth Excavation and Mine Refuse Excavation will be measured in its original position, and the volume in cubic yards computed by the method of average end areas. The volume of any unstable or unsuitable material removed, and the volume of the replacement material, will both be measured for payment in cubic yards.

Excavated material used for purposes other than designated in the Specifications, and material excavated beyond slope lines, will not be measured for payment.

Article 202.09 Basis of Payment

Mine site excavation will be paid for at the contract unit prices per cubic yard for EARTH EXCAVATION and MINE REFUSE EXCAVATION, measured as specified herein, which prices shall include payment for other items incidental to the work included under the general heading of Earthwork for which no payment item is included in the contract.

End of Revisions to SECTION 202.

SECTION 205: EMBANKMENT

SECTION 205: MINE SITE COMPACTION

Article 205.01 Description

This work shall consist of the compaction of earth fill area(s) or mine refuse disposal area(s) and cover soil by depositing, placing and compacting mine refuse and earth fill areas and all cover soil over mine refuse except the top 12 in. (300 millimeters) of cover soil.

Article 205.02 Equipment

Equipment shall meet the requirements of the following Article of SECTION 1100:

Item Article

(a) Disk Harrow 1101.02

(b) Tamping-Type Roller shall consist of one or more cylindrical sections having studs or feet projecting not less than 6 1/2 in. (162.5 millimeters) from the surface of the drum. The number of tamping feet and the area of feet shall be such that the pressure on a single row of feet approximately parallel to the axis of the drum is not less than 200 psi (1.38 kPa) when supporting the full weight of the roller.

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Article 205.03 Preparation of the Subgrade for Earth Cover

Before fill material is placed, all clearing, tree removal and hedge removal over the fill area shall be performed as provided in SECTION 201, and the top 6 in. (150 mm) of the existing ground surface shall be disked and then compacted to the satisfaction of the Engineer. If the fill areas are being constructed during the winter, snow and ice shall be removed from the areas to be covered by fill material. Fill material shall not be placed on frozen earth. When construction is resumed after any winter shutdown period, the top 8 in. (200 mm) of all partially completed fill areas shall be reprocessed and compacted to the minimum specified density prior to placing more fill material in the areas.

When earth fill area(s) are to be constructed on hillsides or slopes, the existing slopes shall be plowed deeply; or if additional precautions for binding the fill materials together are justified, steps shall be cut into the existing slopes before the construction of the fill area is started. If the existing surface is within 6 in. (150 mm) of the elevation of the subgrade or the completed earth surface, it shall be plowed or otherwise broken up to a depth of not less than 6 in. (150 mm).

When the mine refuse disposal area(s) has been graded to the subgrade shown in the plans, MINE REFUSE TREATMENT - LIMESTONE shall be performed on the subgrade in accordance with SECTION 255. The subgrade shall then be compacted with a roller until the tamping feet of the roller penetrate not more than 2 in. (50 mm) into the subgrade or to the satisfaction of the Engineer.

Article 205.04 Placing Earth Cover Material

Fill material shall be placed in accordance with the following requirements:

(a) General. Fill areas shall be constructed of materials that will compact and develop a stability satisfactory to the Engineer. No sod, frozen material or any materials which, by decay or otherwise, might cause settlement, shall be placed or allowed to remain in the fill areas. Fill areas shall be constructed to the height and width deemed necessary to provide for shrinkage during compaction. Upon completion, they shall conform to the lines, grades and cross sections shown on the plans, with proper provision for shrinkage.

When mine refuse disposal areas are constructed of crushed material, broken concrete, stones, or rocks and earth, such materials shall be well distributed and sufficient earth or other fine material shall be incorporated with them when they are deposited to fill the interstices and provide solid embankment. No rock, stones or broken concrete more than 6 in. (150 mm) in largest dimension shall be permitted within a vertical distance of 12 in.

(300 mm) below the surface of the subgrade.

Pieces of concrete, not exceeding 2 sq ft for any area of surface, and large rocks and boulders may be placed in fills without being broken up, provided they are well embedded, and interstices filled with smaller pieces or smaller material in a manner to give a density satisfactory to the Engineer. The layers of the smaller pieces or smaller material shall not exceed 12 in. (300 mm) in depth.

So far as practicable, each layer of material shall extend the entire length and width of

Page | 14 the mine refuses disposal area. The material shall be leveled by means of bulldozers, blade graders or other equipment approved by the Engineer. Each layer shall be not more than 9 in. (225 mm) thick when in loose condition, shall be uniform in cross section, and shall be thoroughly compacted before the next layer is started.

The use of dragline excavators or similar equipment which excavate and deposit material in large unit masses will not be permitted, unless all materials excavated in this manner are spread as provided herein and compacted as required in Article 205.05, or as directed by the Engineer.

Article 205.05 Compaction

Each layer of mine refuse or earth fill material shall be disked sufficiently to break down oversized clods, mix the different materials, secure a uniform moisture content, and ensure uniform density and compaction. Disking may be omitted if the fill consists of non-cohesive material.

All lifts of earth fill or mine refuse will be considered compacted when the tamping feet of the roller penetrates not more than 3 in. into a 9-in. lift or one-third of the depth of the layer being placed. If, after making four passes the required compaction is not yet achieved, the Engineer shall take necessary steps to analyze and test the soil conditions. If tests indicate that the material is above 115 percent or below 90 percent of the standard optimum moisture content then the material shall be dried or wetted as necessary to fall within this range. The layer shall then be recompacted until the desirable results are obtained or an additional four passes are made. If the material is determined to be within the specified optimum moisture content range and four passes have been made, no further compaction efforts are necessary.

All lifts of cover soil shall be compacted except the top 12 in. (300 mm). Compaction will not be required on the top 12 in. (300 mm) of cover soil.

The fill areas shall be sprinkled with water when it is necessary to increase the moisture content of the soil to permit the fill areas to be constructed to the densities indicated above.

Compacting equipment and compacting operations shall be coordinated with the rate of placing the earth materials so that the required density is obtained.

Article 205.06 Maintaining and Trimming Embankments

The Contractor shall replace, at his own expenses, any portions of the fill areas which have been damaged or displaced by reason of carelessness or negligence on his part. After the fill areas have been constructed as specified herein, their sides shall be trimmed to the proper slopes where required, and they shall be maintained by the Contractor to the proper elevation and cross-section until they have been accepted.

Article 205.07 Method of Measurement

Mechanical compaction will not be measured for payment.

Article 205.08 Basis of Payment

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Compaction and any additive or water applied will not be paid for directly, but shall be considered as incidental to the various items of excavation and the cost of their construction shall be included in the unit prices for these items.

End of Revisions to SECTION 205.

SECTION 215: SPECIAL EXCAVATION (add this section)

Article 215.01 Description

Special Excavation shall consist of the removal and disposition of any and all materials encountered within the areas of the mine opening(s), sinkholes, voids, or depressions as specified in the plans. Some of these materials include (but are not limited to): materials listed in Section 201 of the Special Provisions, existing foundation, mine related material such as cribbing, stairs, etc., mine refuse, spoil, and/or earth materials.

Construction Requirements

Article 215.02 Classification

Special excavation shall include all materials encountered within the mine opening(s) as specified in the plans, except water, to be removed prior to filling operations. Excavated material shall be classified by the Engineer prior to handling as:

(a) Unsuitable material to be removed from the site according to Section 201 of the Special

Provisions. The cost of removal and disposal of all unsuitable material off-site shall be considered as incidental to the contract and the cost shall be included in the unit price bid per cubic yard for Special Excavation.

(b) Suitable fill material is to be used in refilling the special excavation(s) and/or disposed of as specified in the plans.

Article 215.03 Overhaul

No work is classified as overhaul.

Article 215.04 Excavation

(a) All materials shall be excavated from within the concrete lining (collar) or around the mine opening(s) to a configuration and depth as specified in the plans to attain a stable base.

The Engineer will determine the configuration and depth of the Special Excavation to attain a stable base in the field.

(b) The concrete lining (collar) of shafts shall not be removed until after the special excavation of the shaft is filled. It shall then be removed or covered in-place so that it is at least 900 millimeters (three feet) below proposed grade.

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(c) Any holes, voids, or open shafts created by these operations shall be secured by the Contractor to prevent entry upon completion of a day's work. No openings shall be allowed to remain unsecured overnight, weekends, holidays, or any other time when work is not in progress.

(d) If subsidence occurs or mine gas is detected, work shall cease immediately and the

Engineer shall be notified.

(e) Any water encountered shall be treated if necessary to meet IEPA Mine Discharge Standards and pumped from the Special Excavation to assure maximum stability. Any cost for this shall be considered incidental and included in the unit price per cubic meter (cubic yard) for Special Excavation.

(f) Prior to shaft filling the base shall be compacted as determined by the Engineer to assure a stable base.

Article 215.05 Method of Measurement

(a) Contract Quantities:

When the project is constructed essentially to the lines, grades or dimensions shown on the plans and the Contractor and the Engineer have agreed in writing that the plan quantities are accurate, no further measurement will be required and payment will be made for the quantities shown in the contract for the various items involved except that if errors are discovered after work has been started, appropriate adjustments will be made.

When the plans have been altered or when disagreement exists between the Contractor and the Engineer as to the accuracy of the plan quantities, either party shall, before any work is started which would affect the measurement, have the right to request in writing and thereby cause the quantities involved to be measured as hereinafter specified.

(b) Measured Quantities:

Special Excavation will be measured in its original position, and the volume in cubic yards computed by the method of average end areas. The volume of any unstable or unsuitable material removed, and the volume of the replacement material, will both be measured for payment in cubic meters (cubic yards).

Excavated material used for purposes other than designated in the Specifications, and material excavated beyond slope lines, will not be measured for payment.

Article 215.06 Basis of Payment

Special Excavation will be paid for at the contract unit price per cubic meter (cubic yard) for SPECIAL EXCAVATION, measured as specified herein.

End of SECTION 215: SPECIAL EXCAVATION

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SECTION 216. MINE OPENING FILLING AND SEALING (add this section)

Article 216.01 Description

This shall include furnishing all labor, materials, equipment, and services to properly fill the mine opening(s), sinkholes, voids, or depressions, as specified in the plans.

Article 216.02 Material

Material for filling and sealing the mine openings shall meet the following material requirements descriptions or Articles in the Standard Specifications:

Item Article

(a) Portland Cement 1001

(b) Fine Aggregates 1003.01

(c) Coarse Aggregates 1004.01

(d) Stone for Rockfill / Rockfill 1005.01

(e) Class SI Concrete 1020

(f) Polyvinyl Chloride (PVC) Pipe 1040

(g) Filter Fabric Material 1080.03

(h) Cement Grout

Cement Grout shall be one part cement to three parts sand (no gravel) - 9 Sack Portland Cement mixture.

(i) Earth

This material shall be soil excavated on-site as specified in the plans and approved by the Engineer. If none is available on-site, the soil material may come from an off-site source and must be approved by the Engineer. This may include material excavated from the shaft that has been approved by the Engineer as suitable fill.

(j) Rubble

This material shall be defined as structure rubble or stone ranging in size from 24 to 36

in. (600 to 900 mm) in any direction. Structure rubble may consist of broken concrete, brick, or stone as designated in the plans and must be approved by the Engineer.

(k) Shot Rock

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Shot rock shall be stone quarried from undisturbed, consolidated deposits of rock reasonably free of shale and shaly stone. The ledges shall be sufficiently thick to produce the desired dimensions. The stone shall be reasonably free of lamination, seams, cracks and other structural defects or imperfections tending to destroy its resistance to weather.

Field stone or boulders will not be accepted.

Gradation: The stone shall have a maximum thickness of 30 in. (750 mm) measured in any direction. Fifty percent of the material shall weigh 60 lb (27.2 kg) or more per piece.

Not more than ten percent shall weigh less than 3 lb (1.4 kg) per piece.

Article 216.03 Submittal and Notification

The Contractor shall notify the Engineer at least three days in advance of starting shaft filling operations. The Contractor shall provide the Engineer with all weight tickets, letters of installation of fill material.

Article 216.04 Construction Requirements

(a) Any water pumped or discharged from within the mine openings shall be tested and treated, if necessary, to meet Illinois Environmental Protection Agency (IEPA) Mine Pollution Discharge Standards. Filling into a flooded shaft shall be permitted provided it does not result in a discharge or release of polluted water.

(b) Open shafts, holes, or voids shall not remain unprotected overnight, weekends, holidays, or any other time when work is not in progress. It shall be the Contractor's responsibility to properly secure from entry any portion of the work remaining at the end of a work day.

(c) On shafts with an existing cap to be removed, the Contractor shall notify the Engineer three working days prior to removing the cap so that an inspector can be present to check for methane and to visually inspect the shafts interior.

(d) On shafts where Special Excavation is required, backfilling or plugging operations shall not commence until the Engineer has inspected the excavated shaft area and approved the satisfactory completion of the Special Excavation.

(e) On shafts where a concrete plug is specified, the placement of the concrete shall not exceed a maximum free fall of 4 ft (1200 mm). No fill materials may be placed on top of the concrete plug until it has been allowed to cure for a minimum of 48 hours. After the required curing period has elapsed the Contractor shall place the remaining fill materials in accordance with the plans and specifications.

(f) On shafts designated to be filled with stone and spanned with a concrete cap, the filling operations shall continue as un-interrupted as possible. Once the shaft has been filled to within 2 ft (600 mm) of the proposed grade, the Contractor shall secure the area with temporary fencing for a 30-day period to allow for settlement. If settlement occurs within that time, the Contractor shall backfill the void with additional aggregate fill material prior to the installation of the concrete cap. The concrete cap shall be constructed and installed in accordance with SECTION 425.

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(g) Filling operations shall be a continuous procedure in accordance with the fill type materials as specified in the plans. Earth fill material shall be placed in lifts of 8 to 12 in.

(200 to 300 mm), and shall be compacted to the Engineer's satisfaction.

(h) If cement grout is specified on the plans, it shall be evenly distributed over the fill, after the filling is complete at the location as shown on the plans the cement grout shall be allowed two days to cure before placing the remaining fill materials. During this time the Contractor shall secure the area with temporary fencing and direct all surface drainage away from the opening.

(i) If no cement grout is specified on the plans, once the shaft has been filled to the proposed grade, the Contractor shall monitor the site for a 30-day settlement period. If settlement occurs within that time the Contractor shall backfill the settled volume with additional fill material.

(j) If earth fill is specified on the plans, geotechnical filter fabric shall be installed over the coarse aggregate fill when no cement grout is required, in accordance with SECTION 282.

(k) The Engineer reserves the right to increase or decrease any or all quantities required for this project. If additional materials are needed, they will be paid for at the contract unit prices as specified, which cost shall include transportation and handling.

Article 216.05 Method of Measurement

Stone fill materials will be measured for payment in tons of Fine Aggregate, Coarse Aggregate, Rockfill, or Shot Rock, or as specified herein. Measurement shall be on weight tickets or receipts provided to the Engineer.

Cement grout will be measured for payment in tons of Cement Grout as specified herein.

Measurement shall be on weight ticket or receipts provided to the Engineer.

Class SI Concrete plugs will be measured for payment in cubic yards.

Polyvinyl Chloride (PVC) Pipe will be measured for payment in lineal feet.

No measurement will be made for Earth fill or Rubble fill.

Filter Fabric Material will be measured for payment in square yards in accordance with Article 282.08.

No measurement will be made for any treatment and/or discharge of water from mine openings.

This shall be considered incidental to filling mine openings but included in the contract unit prices for fill material.

Concrete caps will be measured for payment in cubic yards in accordance with Article 425.11.

Article 216.06 Basis of Payment

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No separate payment will be made for any pumping and/or discharge of water from mine openings.

Stone fill materials will be paid for at the contract unit price per ton as specified herein for FA FILL, CA FILL, ROCKFILL, and SHOT ROCK FILL, and of the class (stone quality and gradation) specified.

Portland Cement concrete caps will be paid for at the contract unit price per cubic yard for PORTLAND CEMENT CONCRETE CAP in accordance with Article 425.12.

Filter Fabric Material will be paid for at the contract unit price per square yard for FILTER FABRIC FOR USE WITH FILL in accordance with Article 282.09.

Cement Grout will be paid for at the contract unit price per ton of CEMENT GROUT.

Rubble fill will not be paid for directly, but shall be considered as incidental to SECTION 501, and the cost of this work shall be included in the unit price for that item.

Earth fill will not be paid for directly, but shall be considered as incidental to SECTION 202 and SECTION 215, and the cost of this work shall be included in the unit price for those items.

Class SI Concrete plugs will be paid for at the contract unit price per cubic yard for CLASS SI

CONCRETE PLUG.

Polyvinyl Chloride (PVC) Pipe will be paid for at the contract unit price per lineal foot for x"

DIAMETER PVC PIPE.

End of SECTION 216.

SECTION 255. MINE REFUSE TREATMENT

Article 255.01 Description

This work shall consist of furnishing, transporting and incorporating agricultural ground limestone required in the treatment of mine refuse. Multiple applications of agricultural ground limestone may be required, as specified in the plans.

Article 255.02 Materials

Agricultural ground limestone used for treatment of mine refuse shall meet the requirements of Article 1081.07.

Article 255.03 Equipment

Equipment used for incorporating agricultural ground limestone and the 3 inches (75 millimeters) of cover material specified in the plans into the upper surface of the mine refuse shall consist of a tractor drawn offset disk. The disk shall have the capability of cutting to the depth of 6 inches

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(150 millimeters). The minimum diameter of the disks shall be 24 inches (600 millimeters). The offset disk shall consist of two rows, or gangs, of disks set at an angle to each other. Each gang shall have a separate frame and axle assembly. The angle shall be adjustable for varying conditions.

Article 255.04 Construction Requirements

Once the specified elevation and desired topography is obtained, agricultural ground limestone will be uniformly spread over the regraded mine refuse area at the rates of application as shown on the plans. Application(s) will be applied only to the areas receiving the cover material over buried mine refuse as specified in the plans. Three inches (75 millimeters) of cover material shall then be spread over the mine refuse treatment area. This cover material shall be incorporated into the upper three inches (75 millimeters) of the mine refuse surface with an offset disk. This blending of six inches (150 millimeters) of soil, agricultural ground limestone, and mine refuse shall be completed to the satisfaction of the Engineer (minimum of two passes required) prior to the placement of the remaining cover material.

Article 255.05 Method of…