Attachment_1_Plans_and_Specs.pdf

01 10 00-1 19047-81 August 16, 2018

01 00 00 - GENERAL REQUIREMENTS

SECTION 01 10 00 - SUMMARY

PART 1 - GENERAL

The purpose of this project is to abate the hazard from an abandoned coal mine feature located on the property of Mr. Ron Conradi and Mrs. Mary Conradi in Enumclaw, Washington (King County). The feature has been designated as:

KR-002. An approximately 7-foot long by 5-foot wide spherical depression that ranges in depth from about 1.5 to 2.5 feet. The surface expression of the feature is located on about a 13-degree slope (about 4 Horizontal to 1 Vertical [4H:1V]) within a wooded area of the property.

Maps showing the feature location are included on Plans C-1, C-2, and C-3. Work will consist of reclaiming the mine feature as summarized in Section 1.2 and as specified and shown on Plans C-4 and C-5.

1.1 Mine Feature Description and Location

Feature KR-002 Description. Feature KR-002 is a 5- by 7-foot oblong depression likely associated with historical mining operations of the Green River Mine. The feature is located approximately 29 feet up a 13-degree slope, east of the homeowner’s horse arena. Depths of the depression range from about 1.5 feet on the downslope end (west) to 2.5 feet on the upslope end (east). Observation of the depression showed soft/loose soil ranging in depth from 2.5 to 3 feet along the perimeter of the depression and increasing to approximately 4 feet at the center. Based on referenced mine maps, a rock access tunnel from the Green River Mine (assumed to be near-horizontal) runs directly beneath the feature.

Location/Property Owner and Access. Feature KR-002 is located at 27307 SE 384th Street, Enumclaw, Washington in the northeast quarter of Section 11, Township 20N, Range 06E, in an overgrown, sloped plane adjacent to a wooded area. The property is owned by Mr. Ron Conradi and Mrs. Mary Conradi. The general access route from Seattle to the feature is shown on Plans C-1, C-2, and C-3.

1.2 Mine Feature Reclamation Methods

Feature KR-002 The reclamation for Feature KR-002, as shown on Plan C-4, generally consists of the following tasks:

Excavate the feature to a depth of up to about 10 feet in an effort to reach the base of the anticipated rock tunnel (or caved material), as indicated on the plans.

Place ballast rock fill from the base of the excavation to approximately 2 feet below existing grade.

Place material to fully fill the exposed void from the bottom of the tunnel. Should the tunnel structure be observed to be open either upslope or downslope, then place and compact the ballast to run out at

19047-81 01 10 00-2 approximately a 2H:1V slope from the crown of the exposed tunnel opening and down the tunnel sections to the tunnel invert (see Plan C-4, detail 3).

Place 1 foot of concrete over the ballast, beginning 2 feet below the adjacent ground-surface grade, as identified in the plans. Slope the final concrete surface to drain downslope.

Place 1 to 2 feet of on-site backfill material over the concrete to bring the area up to meet the adjacent surrounding grade. Allow 16 hours for concrete to cure prior to placement of backfill.

Regrade and revegetate the surface of the feature excavation as well as any additional vegetated areas that were disturbed during construction.

1.3 Special Conditions

Work shall be accomplished in accordance with these specifications and the plans.

Contractor shall verify all levels, dimensions, and existing conditions in the field before proceeding.

Contractor shall notify the Office of Surface Mining Reclamation and Enforcement (OSMRE) of any discrepancies or field changes before installation or fabrication. In case of discrepancies between the existing conditions and the Contract Drawings, the Contractor shall obtain direction from the OSMRE Field Representative before proceeding. Any change resulting in additional cost would require authorization from the OSMRE contracting officer. The Contractor shall notify the OSMRE Field Representative immediately of conflicts or excessive variations from indicated dimensions. Noted dimensions take precedence over scaled dimensions. DO NOT SCALE DRAWINGS.

The Contractor is responsible for the location of and protection of all utilities in the work area and, if necessary, any the cost to repair damage that occurs as a consequence of the proposed work, is the contractor’s responsibility.

The Contractor shall immediately take action to notify the appropriate agencies including OSMRE to contain and clean up, at their own expense, all petroleum products or other hazardous substance releases that are on or near the project and that are caused by the Contractor’s employees, directly or indirectly.

The Contractor shall provide adequate erosion and sediment control, slope protection, shoring, and bracing as required to complete the work. Temporary erosion and sediment control, slope protection, shoring, and bracing shall not be removed until all related specified work has been completed.

The Contractor shall be responsible for all safety precautions and the methods, techniques, sequences, or procedures required to perform the work.

The Contractor shall be responsible for and hold all applicable Washington-required licenses, permits, etc., to perform the work as specified. At a minimum, contractor shall contact the City of Enumclaw to ensure all appropriate permits are obtained. All work shall be accomplished in accordance with all applicable local, state, and federal regulations.

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1.4 Site Location and Use by Others

The project feature is located on private property approximately 100 feet from a neighborhood street.

During construction, the mine feature and the construction site may be attractive to neighbors and pedestrians that may see the work from the nearby street. The Contractor shall be solely responsible for protecting work areas, underground workings accessible through the work areas, and material storage and staging areas from trespass for the duration of the contract. The Contractor shall be prepared and provide all safety measures necessary to complete the work.

1.5 Site Access

Site access for the project is addressed in Section 01100 (1.1) and is shown on the plans. Some brush removal will be necessary to complete the work. However, no tree removal or other clearing shall be accomplished without the owner’s and OSMRE’s approval. The limits of any tree removal and clearing at the site shall be discussed at the site prior to the start of construction. Any subsequent clearing shall be limited to only that necessary for construction and must be approved by OSMRE.

The Contractor shall access the site as shown on the plans. Contractor shall generally restore any disturbed areas at the end of construction to their pre-construction conditions.

1.6 Qualifications

The Contractor’s job superintendent and hired subcontractors shall be competent in working around abandoned mine workings, excavating soil, placing fill, and restoring lawn areas.

The Contractor’s equipment shall be capable of completing the required work as specified and shown on the plans.

1.7 Submittals

The Contractor shall submit personnel data, list of equipment, and Contractor qualifications and experience on similar projects as specified in Section 013300.

The Contractor shall submit a construction schedule as specified in Section 011000. Table 01100-1 presents a typical construction schedule format.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

3.1 Pre-Construction Meeting

The Contractor shall hold a pre-construction meeting with OSMRE to discuss the Contractor’s schedule, submittals, and coordination during construction. The pre-construction meeting will occur on site, allowing observation of the mine feature and access to the project site, and a discussion of the work.

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The Contractor’s designated Superintendent (who shall be on site and responsible for all work) shall be present at the pre-construction meeting, along with any person(s) who may be in charge of the Contractor’s work in the absence of the Superintendent. The Contractor staging area at the site will be identified at the pre-construction meeting.

3.2 Construction Schedule

The Contractor shall submit a project schedule showing the start date and estimated duration of construction for major activities at the feature. The project schedule shall show all work that will be performed concurrently.

The Contractor’s schedule will be used by OSMRE to determine when the OSMRE Field Representative will be on site to observe and measure the work to verify compliance with the plans and specifications and to document payment quantities. The Contractor shall be solely responsible for coordinating with OSMRE on schedule changes. OSMRE shall not be liable for any extra cost when work is delayed because the OSMRE Field Representative is not on site if the Contractor has not given at least two working days’ notice of schedule changes.

Contractor shall not be penalized in the event that work is delayed because of weather, but no increase in cost shall be approved for such delays.

The Contractor shall use the construction schedule format presented in Table 01100-1 and shall include at least the work items listed therein.

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Table 011000-1 – Construction Schedule Format

Date:

Feature Item Day: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 KR-002 Mobilize and Set Up at the Site

Excavate Feature

Place Ballast Fill

Place Structural Concrete

Regrade and Restore Site

Abandon Site and Demobilize

END OF SECTION 01 10 00

01 20 00-1 19047-81

SECTION 01 20 00 - MEASUREMENT AND PAYMENT

PART 1 - GENERAL

1.1 Description

The following sections outline payable items for this project. Each item will be measured as specified. The Contractor shall bid on each item on the Bid Schedule. The quantities listed in these specifications are estimates; actual quantities required shall be determined in the field and may vary from the estimates. The Contractor shall be responsible for verification of these quantities and documentation of quantities actually used for unit price items.

All other work required to complete the contract, including, but not limited to: tree and plant protection, dewatering and water control, disposal of any debris or construction materials, prevention of trespass, protection of materials, work in progress, safety, and installation and maintenance of erosion and sediment controls shall be considered incidental to work shown on the Bid Schedule, and no separate payment shall be made for such incidental work.

All applicable taxes shall be included in the bid prices.

1.2 Payable Work Items

(010) Mobilization, Site Preparation, and Site Access

Payment for “Mobilization, Site Preparation, and Site Access” shall be at the contract lump-sum price, which shall include full compensation for providing all labor, materials, and equipment necessary to prepare for the work and for providing all labor, materials, and equipment to establish, improve, and maintain the access routes to accomplish the work. This shall include preparation of submittals;

furnishing bonds (if any) and insurance; acquiring all federal, state, city, and any other local permits;

attending the pre-construction meeting; preparing the staging area; purchasing or renting equipment required for safety; transporting equipment and materials to the site; all mobilization costs; and other necessary work. The bid price for “Mobilization, Site Preparation, and Site Access” shall not be more than 20 percent of the total project bid price.

(020) Excavation and Grading

Payment for “Excavation and Grading” shall be at the contract lump-sum price, which shall include full compensation for providing all labor, materials, and equipment necessary for excavation and initial and final grading at the mine feature as specified and shown on the plans. All excavation is common.

No extra payment shall be allowed for excavation in differing materials whether it is in fill, native soil, rock, and/or debris. Rock is anticipated to be encountered as the excavation progresses through the slope soils and into the anticipated rock tunnel roof (estimated approximately 4 feet below ground surface). However, the contractor will not be required to remove hard, intact rock if it cannot be excavated with a large tracked excavator/bucket.

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01 20 00-3 19047-81

(030) Hauling and Disposal of Excavated Material

Payment for “Hauling and Disposal of Excavated Material” shall be at the contract unit price per 10-yard dump truck load, which shall include full compensation for providing all labor, materials, and equipment necessary for hauling and disposal of excess excavated material or vegetation (trees or brush) from the site as specified and shown on the plans. All material haul and disposal is common. No extra payment shall be allowed for different materials whether they are fill, native soil, rock, trees, brush, and/or debris. Contaminated materials are not expected to be encountered and Contractor is not required to haul contaminated material from the site under this pay item.

Loads shall be determined and counted by the OSMRE Field representative at the time of hauling.

(040) Ballast Placement

Payment for “Ballast Placement” shall be at the contract unit price per ton, which shall include full compensation for all labor, materials, and equipment necessary to place and compact the ballast as specified and shown on the plans. Limits of the Ballast Placement shall be as indicated on the plans, or as determined by the OSMRE Field Representative in the field at the time of construction.

(050) Structural Concrete Placement

Payment for “Structural Concrete Placement” shall be at the contract unit price per cubic yard and shall include full compensation for all materials, equipment, and labor necessary to furnish and place the structural concrete as specified and shown on the plans. Limits of the structural concrete placement shall be as indicated on the plans, or as determined by the OSMRE representative in the field at the time of construction. Only the volume of concrete placed within the limits determined by OSMRE will be paid for; no payment shall be made for concrete placed beyond these limits or concrete that is wasted during delivery.

The volume of concrete needed is based on the estimate of OSMRE; the volume actually required may vary from the estimate. Mobilization and demobilization costs associated with Structural Concrete Placement shall be included in bid items No. 010 “Mobilization, Site Preparation, and Site Access” and No. 060 “Site Restoration and Demobilization.”

For pre-mix concrete delivered to the site in trucks, volume measurements shall be based on batch tickets documenting quantities delivered to and placed at the site. The quantity of concrete remaining in the truck (i.e., not placed) will be estimated by the OSMRE Field Representative.

OSMRE shall be liable for the cost of any unused structural concrete as long as:

OSMRE approves the amount of concrete the Contractor proposes to order before the order is placed;

and

Failure to place the concrete is solely the result of site conditions, such as the required volume of concrete.

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Payment shall not be made for concrete lost to failure or leakage of the Contractor’s delivery equipment or placing equipment, failure of the contractor to place adequate ballast fill, or waste due to blockage of a pump system or installation line.

The Contractor shall be solely liable for the cost of all concrete that is not placed within the time specified in Section 03300 for reasons such as failure or poor performance of the Contractor’s equipment, insufficient crew size, or poor direction by the Contractor’s superintendent.

Note that OSMRE, at its sole discretion, may elect to change the amount of concrete placed from the estimate, depending on conditions encountered as the work proceeds.

(060) Site Restoration and Demobilization

Payment for “Site Restoration and Demobilization” shall be at the contract lump-sum price, which shall include full compensation for all materials, equipment, and labor necessary to clean the work site of debris and surplus materials, backfill, regrade and revegetate disturbed areas as required, and abandon the site as approved by OSMRE.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

Not used.

END OF SECTION 01 20 00

01 32 00-1 19047-81

SECTION 01 32 00 - CONSTRUCTION OBSERVATION AND

REPORTING

PART 1 - GENERAL

1.1 OSMRE Field Representative's Responsibilities

A. An OSMRE Field Representative will be at the project site as appropriate to monitor construction activities and verify that each item is completed as specified.

B. The OSMRE Field Representative will document site activities in a daily field report to OSMRE. The OSMRE Field Representative will provide the field report to the Contractor each day for review and concurrence with information contained within the report.

C. The OSMRE Field Representative will submit Contractor’s and OSMRE Field Representative’s daily report forms to the OSMRE Contracting Officer’s Representative (COR) on a weekly basis.

D. Neither the presence of the OSMRE Field Representative nor the observation and/or testing by the OSMRE Field Representative/Representative’s company shall excuse the Contractor in any way for defects discovered in the Contractor’s work.

1.2 Contractor’s Responsibilities

A. The Contractor shall complete a daily report that shows work accomplished each day, and names and duties of workers, equipment, and materials used for each day’s work as work proceeds. The Contractor shall address any questions on the daily submittal as requested by the OSMRE Field Representative.

B. The Contractor shall be responsible for coordinating the project work with the OSMRE Field Representative to obtain approval of completed work items as required in these plans and specifications prior to initiating subsequent work items.

C. The Contractor’s on-site Superintendent or alternate preapproved by OSMRE shall be on site during all work.

1.3 Submittals

Contractor shall submit a blank copy of the Contractor’s daily report form to OSMRE in accordance with Section 013000. Contractor shall submit completed forms for each day’s work to the OSMRE Field Representative as work proceeds.

PART 2 - PRODUCTS

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PART 3 - EXECUTION

END OF SECTION 01 32 00

01 33 00-1 19047-81

SECTION 01 33 00 - SUBMITTAL PROCEDURES

PART 1 - GENERAL

This section describes the submittals that the Contractor shall provide OSMRE prior to and during execution of the specified work. Submittals shall include all information listed below and in the referenced section, and any other information necessary to show conformance with the contract documents.

PART 2 - PRODUCTS

Required submittals are summarized in Table 013000-1.

Table 013000-1 - Summary of Submittal Requirements

Referenced Spec. Section Item Minimum Required Submittal Information

011000 Contractor’s Qualification Statement

Submit specified information to OSMRE with bid.

011000 Personnel Data and Proposed Equipment

Submit names of persons who will be working on project, along with their respective Davis-Bacon category and wage rate with bid.

Submit a list of the type of equipment that will be used on this project with the bid.

011000 Construction Schedule Submit daily schedule of work to be accomplished for this contract with bid.

013529 Health and Safety Plana and Name/Qualifications of Competent Person

Submit safety plan that meets requirements (of WAC-296-800-14005) 3 calendar days before pre-construction meeting.

013200 Contractor’s Daily Report Form

Submit blank copy of daily report form 3 calendar days before pre-construction meeting. Submit copies of completed forms daily as work proceeds.

017423 Hauling and Disposal of Excavated Material

Submit proposed hauling and disposal plan 3 calendar days before pre-construction meeting.

017423 Topsoil, Seed Mix, Fertilizer

Submit proposed seed mix and fertilizer at pre-construction meeting.

Submit a copy of the seed bag label, showing constituents, at time of placement.

033000 Concrete Submit concrete placement plan at pre-construction meeting. At time of placement, provide truck tickets to document the quantity delivered and concrete mix design. If concrete is mixed on-site, record and provide number of cement/redi-mix sacks and quantity of water per sack.

312000 Import Permeable Ballast for use as fill material

Submit a 5-gallon bucket sample to OSMRE’s field representative as specified at pre-construction meeting. Submit certification from manufacturer/supplier that shows the material conforms to its specified requirements (including grain size distribution), at pre-construction meeting.

Note:

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a. Neither OSMRE nor Hart Crowser will approve the health and safety plan or be responsible for its adequacy or implementation. Contractor shall be solely responsible for their adequacy and implementation.

PART 3 - EXECUTION

Each submittal shall show the specification section number to which it pertains. Submit information specified as follows:

3.1 Pre-Construction Submittals

Submit one copy to OSMRE via fax, mail, or e-mail:

Attn: Ms. Sherry Stuart U.S. Department of the Interior Office of Surface Mining Reclamation and Enforcement Western Region Denver Federal Center Kipling Street and West 6th Avenue Building 25, Room 1501 Denver, Colorado 80225-0065 Fax: (303) 236-0340 Telephone: (303) 236-0330, x253 Email: sstuart1@OSMRE.gov

Cc: Ms. Nicole Caveny Email: ncaveny@OSMRE.gov

3.2 Submittals during Construction

During construction, submit one original to the OSMRE Field Representative.

END OF SECTION 01 33 00

01 35 29-1 19047-81

SECTION 01 35 29 - SITE SAFETY

PART 1 - GENERAL

1.1 Description

The Contractor shall comply with all applicable local, state, and federal safety regulations during performance of all work, including, but not limited to:

Washington State Department of Labor and Industries Standards;

Federal Occupational Safety and Health Administration (OSHA) Standards; and

Washington State Department of Natural Resources (DNR) Standards.

The Contractor shall inspect the condition of the mine feature/excavation and surrounding area at the start of each work activity and thereafter as frequently as conditions require. The Contractor shall employ a Competent Person on site at all times when work is occurring within or adjacent to the mine feature/excavation. Contractor’s Competent Person shall inspect, sound, and scale the side walls and roof of the mine workings if applicable, as well as the adjacent slopes as necessary to ensure safety. The Contractor shall provide and maintain whatever shoring and/or rock supports are required to accomplish the work safely. The Contractor shall be solely responsible for safety at the site, including safety of employees and all others present. The Contractor shall use practices that protect workers and the public when performing all work.

Underground workings and an abandoned mine feature/opening at the ground surface are both in and adjacent to the Contractor’s work area. Dangerous gases from the mine workings may be present. Depth of cover and degree of underground support in the work area is generally unknown. The Contractor is advised that available information about the extent or condition of the mine workings or other underground hazards at the site may not be complete. The Contractor is advised that the work is in an area where sudden ground collapse may occur without warning.

1.2 Referenced Standards

Washington State Occupational Health Standards (WAC Title 296), and in particular WAC Chapter 296-

155 (Safety Standards for Construction Work).

1.3 Submittals

The Contractor shall submit a Health and Safety Plan to OSMRE, including the name and qualifications of the Contractor’s Competent Person responsible for safety, as specified in Section 013300.

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PART 2 - PRODUCTS

2.1 Health and Safety Plan

The Contractor is responsible for developing an Accident Prevention Program including a written Health and Safety Plan that conforms to WAC 296-800-14005. The plan shall include air monitoring procedures and action levels, fall restraint and/or fall arrest, and shall address the particular hazards of underground construction or working around an excavation as applicable.

Information can be obtained from the Occupational Safety and Health Administration (www.osha.gov) and the Washington State Department of Labor and Industries (www.lni.wa.gov). The Contractor must submit a copy of the plan to OSMRE, but neither OSMRE nor Hart Crowser shall approve the plan or be responsible for its adequacy or implementation.

PART 3 - EXECUTION

3.1 Personal Safety Protection

The Contractor shall be solely responsible for safety at the site, including safety of employees and all others present. The Contractor shall take appropriate precautions to prevent access to the excavation, underground mine workings, and other work areas by the general public at all times during the project. At a minimum, the Contractor shall surround work areas with orange plastic construction safety mesh and warning signs whenever the area is left unattended. The Contractor shall be responsible for the safety of the public at the construction site during the course of the project, including those times when active work is not in progress.

The Contractor shall use practices that protect workers and the public when performing all work, and especially the following:

Personnel working over, near, or within the abandoned mine workings;

Personnel working on, around, and/or below steep slopes and excavations;

Personnel using equipment over and near mine-related features; and Personnel exiting and entering private haul and access roads and public roads with equipment and supplies.

The Contractor shall assess the risk to personnel and equipment and perform the work in a manner that, in the Contractor’s sole judgment, is safe. The Contractor assumes all risk and liability of damage to equipment or harm to personnel during the course of the work.

The Contractor shall provide all personnel working around the abandoned mine feature with appropriate safety equipment such as safety harnesses, ropes, and anchorage and shall implement appropriate fall protection measures.

Surface excavations shall be sloped as needed according to regulations for safety and stability. If applicable, provide ground support for work underground that conforms to WAC 296-155-730 (19). The http://www.osha.gov/ http://www.lni.wa.gov/

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Contractor shall remove loose or unstable material and/or provide rockfall protection and shoring in order to complete the work safely and to allow OSMRE to observe the work safely.

3.2 Mine Gas Monitoring

The Contractor shall be responsible for properly testing the work area for gas concentrations before starting work near or within the abandoned mine feature and shall continuously monitor thereafter while work is occurring in the area. Mine gas monitoring shall conform to WAC 296-155-730(14).

Tests shall be made for, but not limited to, the following gases and/or atmospheres:

Methane;

Hydrogen sulfide;

Oxygen; and Carbon monoxide.

If hazardous levels of gases or atmospheres are encountered, personnel shall be removed from the work area and the test(s) repeated. If hazardous gas levels persist, personnel shall be removed from the area until ventilation is provided and acceptable gas levels and/or atmospheres are achieved. Ventilation shall conform to WAC 296-155-730(15). The Contractor shall periodically check the condition of the workers in the area. If there is a potentially explosive level of methane or other unsafe air conditions are detected in or near the work area, immediate measures shall be taken to clear the gas or otherwise remedy conditions before continuation of work.

3.3 Fire Protection

Hot work such as welding, cutting, and grinding within or over the mine opening shall conform to WAC 296-155-730(18) (b) [use non-combustible barrier] and WAC Chapter 296-155 (Part H).

The Contractor shall take care to avoid risk of fire from on-site activities. The contractor shall comply with the forest fire protection requirements of Washington State Statute RCW 76.04, and Washington State DNR regulation WAC Chapter 332-24. The DNR fire protection program is summarized in the DNR publication, Forest Fire Protection: Requirements for Operations on or near Forest Land (July 1993).

The Contractor shall be responsible for providing fire protection and/or preventing any potential for fires.

The Contractor shall call the DNR IFPL hotline to determine fire danger and comply with local requirements.

3.3.1 Fire Restrictions and Liability

The Contractor agrees, at the Contractor’s sole cost and expense, to prevent, detect, and extinguish fires of any origin whatsoever originating at the project site.

The Contractor shall establish and maintain a fire warning and detection program specifically applicable to the project site. The Contractor agrees to promptly abate any fire hazards at the project site. During the entire project duration, the Contractor shall monitor activities at the project site and shall take necessary

19047-81 01 35 29-4 actions to either extinguish or control emergencies such as fire, and shall notify the property owner and local authorities in a prompt and expeditious manner.

3.4 Construction Traffic

The Contractor shall be responsible for maintaining a safe flow of traffic around work areas at all times, including to and from staging areas and from staging areas to work areas. Staging of material, delivery trucks, and construction equipment on or adjacent to access roads shall be the responsibility of the Contractor. The contractor shall be responsible for acquiring any city road permits necessary for completing this work.

The Contractor shall provide fencing and/or a barricade around work areas at the end of each day to prevent public access to the site.

END OF SECTION 01 35 29

01 71 13-1 19047-81

SECTION 01 57 13 - TEMPORARY EROSION AND SEDIMENT

CONTROL

PART 1 - GENERAL

1.1 Description

Work covered in this section includes installation of erosion controls. The Contractor shall install, maintain, and remove temporary erosion and sediment controls as needed. Temporary erosion controls include, but are not limited to, straw bales or wattles, drainage ditches, and silt fences, as necessary and requested by the OSMRE Field Representative.

The Contractor shall complete all construction activities in a manner that minimizes surface disturbance and sediment generation.

Layout of temporary erosion controls shall be coordinated in the field with the OSMRE Field Representative as the work proceeds.

PART 2 - PRODUCTS

2.1 Straw Bales or Wattles

Tightly bound bales or wattles of fresh (i.e., not rotten) straw or other recently cut, locally available grass shall be used, as necessary, for erosion control.

2.2 Siltation Fence

The siltation fence shall consist of a geosynthetic filter fabric manufactured for sediment control, installed with supporting wire fence and posts.

PART 3 - EXECUTION

3.1 Installation

The Contractor shall have adequate erosion control materials on site during all construction activities.

The Contractor shall:

A. Install adequate erosion and sediment control before any surface disturbance to limit any possible sediment runoff from the work areas. The erosion and sediment controls shall remain in place and shall be maintained throughout construction.

B. Locate silt fence or straw bales/wattles downslope of disturbed areas to intercept potential sediment flow.

C. Excavate ditches as needed to divert runoff during construction.

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D. Control discharge from water flow diversion or dewatering to prevent erosion and turbidity.

3.2 Maintenance and Removal

The Contractor shall maintain temporary erosion and sediment controls adjacent to disturbed and work areas until completion of the work. The Contractor shall monitor the condition of siltation fences and straw bales/wattles and remove accumulated sediment. Dispose of accumulated sediment on site only as approved by the OSMRE Field Representative. Deteriorated or missing items shall be repaired or replaced immediately.

The Contractor shall remove or abandon in-place erosion and sediment control items as requested by OSMRE when the project is completed.

3.3 Preservation of Natural Drainage Pattern

The Contractor shall maintain natural drainage patterns. Direct clean runoff (i.e., free of sediment) away from disturbed areas to natural flow locations to the extent possible.

END OF SECTION 01 57 13

01 71 13-1 19047-81

SECTION 01 71 13 - MOBILIZATION

PART 1 - GENERAL

1.1 Description

This work includes preparing submittals and participating in the pre-construction meeting. This work also includes performing all tasks necessary before mine hazard abatement work begins. This preparatory work shall include furnishing bonds (if any) and insurance; preparing access roads and staging areas; providing safety equipment; transporting personnel, equipment, and materials to the site; and other necessary work.

1.2 Site Facilities

Minimum facilities to be provided by the Contractor include sanitary facilities and garbage containers at the construction site. Fencing to protect material stored in the staging areas is at the Contractor’s sole discretion and risk.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

The Contractor shall minimize disturbance at the work site during this project. The Contractor shall be responsible for suppression of dust resulting from operations. The Contractor shall provide erosion protection before any disturbance of work areas, or staging areas.

3.1 Equipment, Materials, and Facilities Storage

The Contractor shall store equipment, materials, and any facilities moved on the site, within the boundaries of the staging and storage areas established at the pre-construction meeting with the Contractor and OSMRE present at the sites, or as requested by the OSMRE Field Representative.

3.2 Garbage Container

The Contractor shall provide a temporary garbage container at the work site/staging area. Garbage shall be removed daily and disposed of in accordance with state and local regulations.

3.3 Sanitary Facilities

Before work begins on the sites, Contractor shall provide sanitary facilities as required to meet applicable federal, state, and local regulations. Contractor shall keep these facilities in sanitary condition. The portable toilet shall be placed in an inconspicuous and convenient on-site location that will be established at the pre-construction meeting. The sanitary facilities shall be maintained for the duration of construction. Upon completion of construction, the facilities and contents shall be removed.

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END OF SECTION 01 71 13

01 74 00-1 19047-81

SECTION 01 74 00 - SITE RESTORATION

PART 1 - GENERAL

1.1 Description

Work in this section consists of restoring areas disturbed during construction.

1.2 Submittals

Contractor shall submit the following to OSMRE in accordance with Section 013000:

A. Proposed topsoil, B. Proposed seed mix, C. Copy of the bag label for grass seed mix showing constituents, and

D. Proposed starter fertilizer.

PART 2 - PRODUCTS

2.1 Topsoil

Topsoil shall be a commercially available product intended for lawn restoration.

2.2 Seed

Contractor shall use a commercially packaged mixture of rye and fescue grass seed approved by OSMRE.

All seed shall conform to the current rules and regulations of the U.S. Department of Agriculture. Seed shall be thoroughly premixed and delivered to the work site in bags or containers clearly tagged showing the name and address of the supplier, the net weight for each species of seed in the mix, the percent of weed seed content, and the guaranteed percentage of purity and germination for each species furnished.

2.3 Starter Fertilizer

Starter fertilizer shall be a commercially available product intended for lawn restoration.

PART 3 - EXECUTION

3.1 Site Restoration

The working areas disturbed during construction shall be regraded and restored to conditions equivalent to their pre-construction condition. Disturbed areas shall be smooth-graded to blend into the adjoining terrain. In areas that require revegetation, Contractor shall obtain OSMRE approval of final smooth-grading before revegetation.

19047-81 01 74 00-2

3.2 Revegetation

Vegetated areas disturbed during construction shall be revegetated by Contractor. Seeding shall not be done during periods of high wind or heavy rain. Seeding and planting shall be done in accordance with manufacturer’s recommendations.

3.2.1 Seeding Preparation

Disturbed areas shall be prepared as needed for broadcast seeding. Contractor shall remove and dispose of foreign materials and debris collected during revegetation preparation. Seeding preparation shall include loosening compacted areas with hand tools if needed.

Seeding preparation shall be suspended when soil moisture conditions are not suitable for the preparation of a satisfactory seedbed as determined by OSMRE. Seeding preparation shall not precede seeding by more than 1 day.

3.2.2 Seeding and Planting

Seeding shall be broadcast by hand or broadcaster. Broadcast seed shall be lightly raked into the native soil. Seed shall be applied only after satisfactory preparation of seedbed accepted by OSMRE, and with an OSMRE Field Representative on site to observe seeding.

3.2.3 Starter Fertilizer Placement

Starter fertilizer shall be placed over topsoil in disturbed areas before seeding. Starter fertilizer shall be applied the same day that seeding has been completed.

END OF SECTION 01 74 00

01 74 23-1 19047-81

SECTION 01 74 23 - DEMOBILIZATION AND SITE

ABANDONMENT

PART 1 - GENERAL

1.1 Description

The Contractor shall clean the work site of debris and surplus materials, remove supplies and equipment, remove temporary structures, and abandon the site as required by OSMRE. Site abandonment shall be deemed complete only after review and approval by OSMRE.

1.2 Submittals

Contractor shall submit proposed hauling and disposal plan of excavated material to OSMRE in accordance with Section 013000.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

3.1 Removal of Waste, Debris, And Unused Materials

Before site abandonment, the Contractor shall legally dispose of all waste and unused materials. Burning on site is not permitted.

Excess vegetation and excavated soil and/or rock may not be left on the site, except as directed by the OSMRE representative.

3.2 Removal of Temporary Structures and Equipment

Upon completion of construction and acceptance of revegetation by OSMRE, the Contractor shall remove temporary structures, facilities, and equipment. Removed temporary structures, facilities, and equipment remain the property of the Contractor and shall be disposed of in a legal manner.

3.3 Site Abandonment

All disturbed areas shall be smooth-graded to blend into the adjacent terrain. The Contractor shall obtain OSMRE approval of final smooth grading before revegetation.

Contractor shall leave all areas of the work site in a condition comparable to or better than at the start of the work.

19047-81 01 74 23-2

Subsequent to completion of all other work, Contractor shall review the condition of the site with OSMRE prior to final abandonment. Final site abandonment shall be accomplished to the satisfaction of OSMRE.

END OF SECTION 01 74 23

01 89 13-1 19047-81

SECTION 01 89 13 - SITE PREPARATION

PART 1 - GENERAL

1.1 Description

Site preparation includes improvements as needed to provide access to the feature for personnel, materials, and equipment.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

Contractor shall limit clearing of the construction areas. Trees, stumps, and other vegetation shall be cleared only as necessary to perform construction as presented herein and/or for safety reasons. All clearing must be approved by the OSMRE Field Representative on site during construction.

3.1 Clearing

The Contractor shall avoid damage to living trees; if tree removal is absolutely necessary, approval from OSMRE and the owner is required.

3.1.1 Clearing

The Contractor shall remove shrubs and other obstructions within the limits of the work areas as established and flagged at the pre-construction meeting. If additional clearing is necessary, the Contractor shall bring it to the attention of OSMRE and obtain approval before proceeding. Contractor may not leave cleared vegetation, soil, or rock on site. Contractor shall legally dispose of all waste materials from clearing operations off site.

END OF SECTION 01 89 13

03 30 00-1 19047-81

03 00 00 - CONCRETE

SECTION 03 30 00 - CAST-IN-PLACE CONCRETE

PART 1 - GENERAL

1.1 Description

Structural cast-in-place concrete shall be used for the feature cap above the crushed rock. The concrete shall be placed as shown on the plans. A permanent monument to mark the location of the completed work shall be installed as shown on the plans prior to curing of concrete.

1.2 Referenced Standards

The publication, codes, and standards listed below form a part of this section to the extent referenced.

They are referred to in the text by basic designation only; the most current version of the reference shall be used unless a specific date is shown.

2018 WSDOT Standard Specifications for Road, Bridge, and Municipal Construction.

1.3 Submittals

A. The Contractor shall submit a concrete placement plan to OSMRE in accordance with Section

013000. The plan shall include the following information:

Mix proportions, including type and quantity of any admixtures, and associated mix design number;

Method of mixing and placing concrete;

Proposed equipment to be used to consolidate (vibrate) concrete during placement; and

Proposed disposal location of excess concrete and truck clean-out upon completion of concrete placement, if applicable. On-site disposal of excess concrete and truck clean-out will not be allowed.

B. At the time of construction, if concrete is mixed on-site, Contractor shall provide and record the number of cement/redi-mix sacks and quantity of water per sack. If redi-mix concrete is delivered, truck tickets shall be submitted to the OSMRE Field Representative.

1.4 Mixing and Time Until Placement

All concrete used shall be thoroughly mixed either in a delivery truck, by hand, or with a small portable mechanical mixer (if selected by the Contractor) to produce a uniform distribution of the materials with a suitable consistency.

19047-81 03 30 00-2

Concrete shall be placed no more than 90 minutes after mixing, unless the mix approved by OSMRE includes a retarding agent or other admixture to extend the working time. No admixture or extension of the time before placement shall be allowed except for that included in the mix design that is preapproved by OSMRE. Under no circumstances shall concrete be placed if it is no longer plastic and workable, or if it is of questionable quality.

PART 2 - PRODUCTS

2.1 Concrete Mix

The Contractor shall use Type I, Type II, or Type III Portland cement that conforms to ASTM C 150 in all concrete. The Contractor shall proportion the mix to accommodate placement techniques and produce a minimum of 3,000 and 4,000 pounds per square inch (psi) unconfined compressive strength after 7 and 28 days, respectively.

2.2 Permanent Monument

OSMRE will supply a brass monument marker. All other materials needed for installation shall be commercially available products as indicated in the plans, and furnished by the Contractor.

PART 3 - EXECUTION

3.1 Feature Concrete Placement

All concrete shall be placed in the presence of the OSMRE Field Representative. Place concrete as soon as possible after mixing and only while the concrete is plastic and workable.

Concrete shall not be placed:

1. In standing water;

2. Until OSMRE Field Representative has observed and accepted the excavation work performed by the contractor; and

3. When air temperature is below 35o F or above 90o F.

Concrete shall be placed and consolidated by methods that do not segregate aggregates or displace forms or reinforcements. Placement shall be accomplished to produce compact, dense concrete with an even surface that is free of depressions and high areas.

Concrete shall be placed as defined on the plans. A minimum of 16 hours of curing time is required before subsequent soil is placed above concrete or traffic allowed over the new pavement.

3.2 Waste Disposal

All concrete waste produced from placement, spilled concrete, or excess concrete shall be promptly removed from the site by the Contractor unless specifically approved by the COR.

03 30 00-3 19047-81

All other materials such as excess reinforcement or form material shall be removed and disposed of legally.

3.3 Monument Installation

The Contractor shall install a permanent monument at the feature to mark the location of the completed closure. The Contractor shall install the brass marker as shown on Plan C-5.

END OF SECTION 03 30 00

31 20 00-1 19047-81

31 00 00 - EARTHWORK

SECTION 31 20 00 - EARTHMOVING

PART 1 - GENERAL

1.1 Description

Work covered by this section includes: excavation within and around the mine feature that is necessary to accomplish the work; stockpiling excavated material; reuse of site soil; placement and compaction of soil and rock fill materials; and final grading. Means and methods of accomplishing the work shall be the responsibility of the Contractor.

1.2 Standard Specifications

All work to be performed and materials to be used shall be in accordance with the 2018 Washington State Department of Transportation (WSDOT) Standard Specifications for Road, Bridge, and Municipal Construction (2018 WSDOT Standard Specifications hereafter), unless otherwise indicated herein.

The 2018 WSDOT Standard Specifications apply only to products and execution and how they are to be incorporated into the work. The legal/contractual relationship sections and the measurement and payment sections do not apply to this document.

1.3 Submittals

The Contractor shall submit the proposed source of all imported aggregate materials.

The Contractor shall submit a 5-gallon bucket sample of permeable ballast along with the results of grain-size analysis in accordance with ASTM D 488 to OSMRE’s local field representative. Additional samples shall be submitted if the material type changes sufficiently, as determined by OSMRE and their field representative.

PART 2 - PRODUCTS

2.1 Ballast

Ballast shall meet the requirements of Permeable Ballast as described in Section 9-03.9(2) of the 2018 WSDOT Standard Specifications and should not be contaminated.

PART 3 - EXECUTION

3.1 Excavation

Excavation shall be accomplished as required by plans and specifications and to provide safe and stable conditions during construction. Contractor shall be prepared to excavate soil and rock up to the depth noted on the plans and place it in stockpile(s) for use in final grading or remove it from the site. All mine

19047-81 31 20 00-2 feature excavations shall be performed in the presence of the OSMRE Field Representative. Contractor shall keep the disturbed areas free of water while construction is in progress. Excavated material from the upper 1 to 2 feet of the excavation shall be stockpiled separately for re-use as backfill over the top of the concrete as a growing medium for the revegetation.

3.2 Grading

3.2.1 General

Any material used in the uppermost 1 to 2 feet for grading shall consist of stockpiled excavated material, as required. Limits of grading will be established during the pre-construction meeting. Any modifications in grading limits shall be limited to only those necessary for construction and must be approved by OSMRE.

The Contractor shall not use any material deemed unsuitable by the OSMRE Field Representative.

3.2.2 Final Surface around the Mine Features

All grading work shall be performed in the presence of the OSMRE Field Representative. The OSMRE Field Representative shall approve grading before any required revegetation activities.

3.3 Ballast Placement

The Contractor shall only import uncontaminated soil and aggregates for use on site.

END OF SECTION 31 20 00

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