Attachment_1_Plans_and_Specs.pdf

19047-86 August 17, 2018

Contents

01 00 00 - GENERAL REQUIREMENTS

SECTION 01 10 00 - SUMMARY OF WORK

SECTION 01 20 00 - MEASUREMENT AND PAYMENT

SECTION 01 32 00 - CONSTRUCTION OBSERVATION AND REPORTING

SECTION 01 33 00 - SUBMITTALS

SECTION 01 35 29 - SITE SAFETY

SECTION 01 57 13 - EROSION AND SEDIMENTATION CONTROL

SECTION 01 71 13 - MOBILIZATION

SECTION 01 74 00 - REVEGETATION AND SITE RESTORATION

SECTION 01 74 23 - DEMOBILIZATION AND SITE ABANDONMENT

SECTION 01 89 13 - SITE PREPARATION

03 00 00 - CONCRETE

SECTION 03 20 00 - CONCRETE REINFORCEMENT

SECTION 03 30 00 - CAST-IN-PLACE CONCRETE

31 00 00 - EARTHWORK

SECTION 31 20 00 - EARTHWORK

ENCLOSURES

PLAN C-1 - REGIONAL MAP, LIST OF PLANS, SYMBOLS, AND NOTES

PLAN C-2 - AREA MAP

PLAN C-3 - SITE VICINITY AND ACCESS MAP

PLAN C-4 - FEATURE IS-205 SECTION

01 10 00-1 19047-86

01 00 00 - GENERAL REQUIREMENTS

SECTION 01 10 00 - SUMMARY OF WORK

PART 1 - GENERAL

The purpose of this project is to abate the hazard from an abandoned coal mine feature located in a residential lawn at 754 Sunrise Place SW, Issaquah, Washington (King County). The feature has been designated as:

IS-205. An approximately 2-foot-by-3.5-foot opening was located along the alignment of a 3.5-foot tall rockery landscaping wall on the northern edge of the 754 Sunrise Place property. From the lower side of the retaining wall, the sloughed soil in the center of the feature is about 2.5 to 4 feet deep. Using a stainless-steel peat probe, soft/loose soil was determined to extend another 1.5 to 8 feet below the top of the sloughed soil, with larger penetrations observed to the north.

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 the plans.

1.1 Mine Feature Description and Location

Feature IS-205 Description. Feature IS-205 is very likely a mine-related subsidence. A collapse in the workings of the Bagley No. 1 and No. 2 seams, or a connecting shaft between the two seams, is the most likely cause of this subsidence. Coal seams in the area are mapped to be dipping at about 26 degrees downward to the north. Based on elevations in maps of the Newcastle-Issaquah Mine, the Bagley No. 2 seam water level workings could be very shallow in this area, with the feature mapping near the projected outcrop of the Bagley No. 2 coal seam; however, the exact depth to the workings is unknown. The Bagley No. 1 seam is located roughly 30 feet below the No. 2 seam, with the May Creek seam another 50 feet lower. The network of shafts and tunnels, connecting up to three coal seams at different depths below the feature, supports the likelihood that the feature is mine-related.

Location/Property Owner and Access. Feature IS-205 is in the northeast quarter of the southeast quarter of Section 33, Township 24N, Range 06E, in a residential front yard at 754 Sunrise Place SW, Issaquah, Washington. The property is owned by Mr. Paul Gore. The general access route from Seattle is shown on Plans C-1, C-2, and C-3.

1.2 Mine Feature Reclamation Methods

Feature IS-205 The reclamation for Feature IS-205, as shown on Plan C-4, generally consists of the following tasks:

Excavate the feature to a depth of approximately 8 to 10 feet in an effort to define a specific opening or throat.

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If the excavation reveals a well-defined opening:

• Install a contractor-designed temporary bulkhead as shown on the plans.

• Place reinforcing steel in the void above the bulkhead as identified on the plans.

• Place structural concrete in the void above the bulkhead as identified on the plans. The top of the final concrete surface shall be sloped to shed water toward the street, Sunrise Place SW.

• Grade the ground surface and place topsoil and seed above the concrete in all lawn areas that have been disturbed by the construction activity.

• Rebuild the rockery to match its condition on each side of the subsidence.

If the excavation does not reveal a well-defined opening:

• Backfill the excavation with structural concrete as identified on the plans. The top of the final concrete surface shall be sloped to shed water toward the street, Sunrise Place SW.

• Grade the ground surface and place topsoil and seed above the concrete in all lawn areas that have been disturbed by the construction activity.

• Rebuild the rockery to match its condition on each side of the subsidence.

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. 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.

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

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

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.

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

01 10 00-3 19047-86

Contractor shall be responsible for and hold all applicable Washington-required licenses, permits, and so forth needed to perform the work as specified. Contractor shall contact the City of Issaquah to ensure all appropriate permits are obtained. All work shall be accomplished in accordance with all applicable local, state, and federal regulations.

1.4 Site Location and Use by Others

The project feature is in a residential neighborhood with no restrictions on public access. During construction, the mine feature and the construction site may attract the public and may be a serious safety hazard. 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. Contractor shall prepare and provide all safety measures necessary to complete the work.

1.5 Site Access

Site access for the project is addressed in Section 01 10 00 (1.1) and is shown on the plans. No tree removal or other clearing shall be done 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 those necessary for construction and approved by OSMRE.

Contractor shall access 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

Contractor’s job Superintendent and hired subcontractors shall be competent in working around abandoned mine workings, excavating soil, placing reinforced concrete, restoring lawn areas, and rebuilding rockeries.

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

1.7 Submittals

A. Contractor shall submit personnel data, list of equipment, and Contractor qualifications and experience on similar projects as specified in Section 01 33 00.

B. Contractor shall submit a construction schedule as specified in Section 01 33 00. Table 01 10 00-1 presents a typical construction schedule format.

PART 2 - PRODUCTS

Not used.

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PART 3 - EXECUTION

3.1 Pre-Construction Meeting

Contractor shall hold a pre-construction meeting with OSMRE to discuss Contractor’s schedule, submittals, and coordination during construction. The pre-construction meeting will be on site.

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 Contractor’s work in the absence of the Superintendent. 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. Contractor staging area at the site will be identified at the pre-construction meeting.

3.2 Construction Schedule

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.

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. 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 Contractor has not given at least two working days’ notice of schedule changes.

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

Contractor shall use the construction schedule format presented in Table 01 10 00-1 and shall include at least the work items listed therein.

01 10 00-5 19047-86

Table 01 10 00-1 - 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

IS-205 010 - Mobilization, Site Preparation, and Site Access

020 - Excavation and Grading

030 - Placement of Temporary Bulkhead

040 - Placement of Reinforcing Steel Bar

050 - Placement of Structural Concrete

060 - Site Restoration

070 - Demobilization

END OF SECTION 01 10 00

01 20 00-1 19047-86

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.

Contractor shall bid on each item on the Bid Schedule. Quantities listed in these specifications are estimates; actual quantities required shall be determined in the field and may vary from the estimates.

Contractor shall be responsible for verifying these quantities and documenting 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 and protection of materials and 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 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 needed 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; providing the sani-can;

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 different materials whether fill, native soil, rock, and/or debris. No excavation of hard intact rock will be required.

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(030) Temporary Bulkhead

Payment for “Temporary Bulkhead” shall be at the contract lump sum price and shall include full compensation for all materials, equipment, and labor necessary to construct and install the contractor-designed temporary bulkhead. For bidding purposes, it should be assumed that the bulkhead needs to cover an opening no larger than 6-feet-by-6-feet in plan dimensions (measured perpendicular to the axis of the opening).

(040) Reinforcing Steel Bar Placement

Payment for “Reinforcing Steel Bar Placement” shall be at the contract unit price per lineal foot of reinforcing steel bar placed and shall include full compensation for all materials, equipment, and labor necessary to furnish and install the reinforcing bars as shown on the drawings.

(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.

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

Payment shall not be made for concrete lost because of failure or leakage of Contractor’s delivery equipment or placing equipment, failure of Contractor-designed temporary bulkhead, or waste due to blockage of a pump system or installation line.

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Contractor shall be solely liable for cost of all concrete not placed within the time specified in Section 03 30 00 for reasons such as failure or poor performance of Contractor’s equipment, insufficient crew size, or poor direction by Contractor’s Superintendent.

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

(060) Site Restoration

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, regrade disturbed areas, place topsoil, revegetate any areas where vegetation was disturbed, replace fruit trees and shrubs, rebuild rockery segments, and abandon the site as approved by OSMRE.

(070) Demobilization

Payment for “Demobilization” shall be at the contract lump sum price, which shall include full compensation for all materials, equipment, and labor necessary to remove the sani-can, any surplus debris or materials, and equipment from the site.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

END OF SECTION 01 20 00

01 32 00-1 19047-86

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

C. An OSMRE Field Representative will submit Contractor’s and OSMRE Field Representative’s daily report forms to OSMRE Contracting Officer’s Representative (COR) weekly.

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 Contractor in any way for defects discovered in Contractor’s work.

1.2 Contractor’s Responsibilities

A. 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. Contractor shall address any questions on the daily submittal as requested by the OSMRE Field Representative.

B. 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 before initiating subsequent work items.

C. 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 Contractor’s daily report form to OSMRE in accordance with Section 01 33 00. Contractor shall submit completed forms for each day’s work to the OSMRE Field Representative as work proceeds.

PART 2 - PRODUCTS

19047-86 01 32 00-2 August17, 2018

PART 3 - EXECUTION

END OF SECTION 01 32 00

01 33 00-1 19047-86

SECTION 01 33 00 - SUBMITTALS

PART 1 - GENERAL

This section describes submittals Contractor shall provide OSMRE before 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 contract documents.

PART 2 - PRODUCTS

Required submittals are summarized in Table 01 33 00-1.

Table 01 33 00-1 - Summary of Technical Submittal Requirements

Referenced Specification

Section Item Minimum Required Submittal Information

01 10 00 Contractor’s Qualification Statement

Submit specified information to OSMRE with bid.

01 10 00 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 bid.

01 10 00 Construction Schedule Submit daily schedule of work to be accomplished for this contract at pre-construction meeting with bid.

01 35 29 Health and Safety Plan1 and Name/Qualifications of Competent Person

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

01 32 00 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.

01 74 00 Seed, Mulch, Topsoil, Shrubs, and Trees

Submit proposed seed mix and mulch type at pre-construction meeting.

Submit type and description of fruit trees for replacement at pre-construction meeting. Submit a copy of the seed bag label, showing constituents, at time of placement. Submit proposed topsoil source and description and shrub variety and size prior to placement.

03 20 00 Concrete Reinforcing Steel

Submit certification of size and grade of steel at pre-construction meeting.

01 10 00 Temporary Bulkhead Submit proposed temporary bulkhead design and construction plan prior to construction of the bulkhead.

03 30 00 Structural 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.

Note:

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

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PART 3 - EXECUTION

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

3.1 Pre-Construction Submittals

Submit one copy to OSMRE by fax, mail, or email:

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

mailto:sstuart1@OSMRE.gov

01 35 29-1 19047-86

SECTION 01 35 29 - SITE SAFETY

PART 1 - GENERAL

1.1 Description

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.

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

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 01 33 00.

PART 2 - PRODUCTS

2.1 Health and Safety Plan

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

19047-86 01 35 29-2 action levels, fall restraint and/or fall arrest, and shall address the particular hazards of underground construction.

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). 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

Contractor shall be solely responsible for safety at the site, including safety of employees and all others present. Contractor shall take appropriate precautions to prevent access to the underground mine workings and other work areas by the general public at all times during the project. At a minimum, Contractor shall surround work areas with orange plastic construction safety mesh and warning signs as well as cover any holes in the roadway more than 3-inches deep with steel plates whenever the areas are left unattended. 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.

Contractor shall use practices that protect workers and the public when Contractor is performing any work, especially these individuals:

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

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

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.

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

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, Contractor shall provide ground support for work underground that conforms to WAC 296-155- 730 (19). Contractor shall remove loose or unstable material and/or provide rockfall protection and shoring as applicable and needed to complete the work safely and to allow OSMRE to observe the work safely.

http://www.osha.gov/ http://www.lni.wa.gov/

01 35 29-3 19047-86

3.2 Mine Gas Monitoring

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).

The following gases and/or atmospheres shall be tested for:

Methane, Hydrogen sulfide, Oxygen, and Carbon monoxide.

Tests are not limited to these gases.

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). Contractor shall periodically check condition of 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 work continues.

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).

Contractor shall take care to avoid risk of fire from on-site activities. Contractor shall comply with 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 (March 2013).

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

Contractor shall call the DNR Industrial Fire Precaution Levels hotline to determine fire danger and comply with local requirements.

3.3.1 Fire Restrictions and Liability

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

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

19047-86 01 35 29-4 extinguish or control emergencies such as fire, and shall notify property owner and local authorities in a prompt and expeditious manner.

3.4 Construction Traffic

Contractor shall be responsible for maintaining a safe flow of traffic around the work areas at all times, including to and from staging areas and from staging areas to work areas. Traffic flow should be in accordance with any required traffic control plans and permits. Staging of material, delivery trucks, and construction equipment on or adjacent to access roads shall be Contractor’s responsibility.

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 57 13-1 19047-86

SECTION 01 57 13 - EROSION AND SEDIMENTATION

CONTROL

PART 1 - GENERAL

1.1 Description

Work covered in this section includes installation of erosion controls. 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.

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 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

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

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.

19047-86 01 57 13-2

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

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

3.2 Maintenance and Removal

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

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

Contractor shall maintain natural drainage patterns and direct clean runoff (i.e., runoff 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 19047-86

SECTION 01 71 13 - MOBILIZATION

PART 1 - GENERAL

1.1 Description

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

providing a sani-can; transporting personnel, equipment, and materials to the site; and other necessary work.

1.2 Site Facilities

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

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

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

3.1 Sanitary Facilities

Before work begins on the site, 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.

3.2 Equipment, Materials, and Facilities Storage

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

3.3 Garbage Container

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.

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END OF SECTION 01 71 13

01 74 00-1 19047-86

SECTION 01 74 00 - REVEGETATION AND SITE

RESTORATION

PART 1 - GENERAL

1.1 Description

Work in this section consists of restoring the on-site rockery, chain link fencing, and vegetating areas disturbed during construction. The revegetation applies only to areas that were vegetated before construction.

1.2 Submittals

Contractor shall submit the following to OSMRE in accordance with Section 01 33 00:

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

D. Proposed replacement fruit trees type and source.

E. Proposed replacement shrub variety and size.

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 Peat Moss

Peat moss shall be a commercially available product intended for lawn restoration.

19047-86 01 74 00-2

2.4 Fruit Trees

Fruit trees should be removed and replaced where practical or otherwise replaced in kind with an approved commercially available similar fruit tree variety and size.

2.5 Shrubs

Shrubs should be removed and replaced where practical or otherwise replaced in kind with an approved commercially available similar shrub variety and size.

2.6 Mulch

Mulch should be similar to the existing mulch.

2.7 Rockery Components

Rockery rocks should be similar in size, look, and quality as those components that make up the existing rockery adjacent to the feature. Existing rockery rocks may be reused as available.

Select fill shall meet 2018 WSDOT Standard Specification 9-03.12(2) Gravel Backfill for Walls with 100 percent passing the 1.5-inch sieve, or equivalent approved by the OSMRE Field Representative.

Quarry spalls shall meet 2018 WSDOT Standard Specification 9-13.1(5) or equivalent approved by the OSMRE Field Representative.

2.8 Fence Components

Chain link fence components should be similar in size, look, and quality as those components that make up the fencing on adjacent sides of the reclamation area.

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.

3.2 Revegetation

Vegetated areas disturbed during construction shall be revegetated by Contractor. Seeding and spreading of peat moss shall not be done during periods of high wind or heavy rain. Seeding, planting, and peat moss placement 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 and constructing surface water diversion structures to control erosion, as directed by the OSMRE Field Representative.

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 one 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 the OSMRE Field Representative on site to observe seeding.

3.2.3 Peat Moss Placement

Peat moss shall be placed over topsoil in disturbed areas after seeding. Peat moss shall be applied the same day that seeding has been completed.

3.2.4 Fruit Tree Placement

Fruit trees shall be placed in topsoil in disturbed areas after restoration. Fruit trees shall be placed the same day that restoration has been completed or when it is permissible to plant trees. Trees shall be replanted in accordance with the supplier’s recommendations or generally accepted professional landscaping practices.

3.2.5 Shrub Placement

Shrubs shall be placed in topsoil in disturbed landscaped areas after restoration. Shrubs shall be placed the same day that restoration has been completed or when it is permissible to plant shrubs. Shrubs shall be replanted in accordance with the supplier’s recommendations or generally accepted professional landscaping practices.

3.3 Rockery Restoration

Rockery restoration work should be consistent with Figure C-4 and of similar or better quality and look as the existing rockery adjacent to the feature.

3.4 Fence Restoration

Chain link fence restoration should be of similar or better quality and look as the existing fence adjacent to the feature

END OF SECTION 01 74 00

01 74 23-1 19047-86

SECTION 01 74 23 - DEMOBILIZATION AND SITE

ABANDONMENT

PART 1 - GENERAL

1.1 Description

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.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

3.1 Removal of Waste, Debris, and Unused Materials

Before site abandonment, 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 site.

3.2 Removal of Temporary Structures and Equipment

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

3.3 Site Abandonment

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

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

After completing all other work, Contractor shall review condition of site with OSMRE before final abandonment. Final site abandonment shall be accomplished to the satisfaction of OSMRE.

END OF SECTION 01 74 23

01 89 13-1 19047-86

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 construction areas. Rockery components, 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

Contractor shall obtain approval from OSMRE before any tree removal. Contractor shall avoid damage to living trees and prepare fruit trees for removal and replacement if appropriate.

3.1.1 Clearing

Contractor shall remove rockery components, trees, shrubs, and other obstructions within the limits of the work area as established and flagged at the pre-construction meeting. If additional clearing is necessary, 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 20 00-1 19047-86

03 00 00 - CONCRETE

SECTION 03 20 00 - CONCRETE REINFORCEMENT

PART 1 - GENERAL

1.1 Description

This section provides instructions for fabricating and installing steel for the reinforced concrete.

1.2 Referenced Specifications

The publications listed below form a part of this section to the extent referenced. The publications are referred to in the text by basic designation only and, unless otherwise specified, refer to the most current version of the publication.

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM):

ASTM A 615 Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

AMERICAN CONCRETE INSTITUTE (ACI):

ACI 318 Building Code and Commentary

1.3 Submittals

Submit to OSMRE the following in accordance with Section 01 33 00:

Certification of reinforcing bars size and grade.

PART 2 - PRODUCTS

2.1 Reinforcing Steel

Concrete reinforcing shall consist of steel-reinforcing bars or welded wire mesh. Reinforcing bars shall be the size and grade indicated on the plans and conform to ASTM A 615, and be free of loose, flaky rust, loose scale, oil, or other objectionable materials.

19047-86 03 20 00-2

PART 3 - EXECUTION

3.1 Concrete Reinforcing

Contractor shall position the steel reinforcing bars as shown on the plans and secure steel so it does not move as concrete is placed. Lap splices shall be in accordance with ACI 318. Welding of reinforcing steel shall not be allowed. The OSMRE Field Representative shall approve placement of reinforcing steel before placement of concrete.

END OF SECTION 03 20 00

03 30 00-1 19047-86

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 backfill. The concrete shall be placed as shown on the plans. The concrete shall cure a minimum of 16 hours before soil is placed on top of it.

1.2 Referenced Standards

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

They are referred 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. Contractor shall submit a concrete placement plan to OSMRE in accordance with Section 01 33 00.

The plan shall include the following information:

Details of Contractor-designed temporary bulkhead and its method of construction;

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, 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 Contractor) to produce a uniform distribution of the materials with a suitable consistency.

19047-86 31 20 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

Contractor shall use Type I, Type II, or Type III Portland cement that conforms to ASTM C 150 in all concrete. 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.

PART 3 - EXECUTION

3.1 Placement

All concrete shall be placed in the presence of the OSMRE Field Representative. Contractor shall 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 inspected and approved the excavation work performed by

Contractor,

3. Until OSMRE Field Representative has inspected and approved reinforcement, or

4. When air temperature is below 35 oF or above 90 oF.

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.

3.2 Waste Disposal

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

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

3.3 Contractor-Designed Temporary Bulkhead

The temporary bulkhead shall be designed and constructed by Contractor to confine the structural concrete. Loss of any concrete due to an insufficient temporary bulkhead shall be the responsibility of Contractor and OSMRE shall not be charged for any additional concrete required. Staged concrete placement shall be used at the discretion of Contractor.

The bulkhead shall be anchored adequately into the surrounding material to prevent movement and escape of concrete during placement. The bulkhead shall be installed from the surface or outside the actual mine entry where concrete is required.

The surfaces of the feature to be filled shall be as free as possible of loose dirt, loose rock, debris, and/or wet surfaces. Concrete shall not be applied to surfaces with standing or running water. Obtain approval of the OSMRE Field Representative prior to concrete placement. Concrete shall only be placed in the presence of the OSMRE Field Representative.

Contractor shall confirm placement of the bulkhead with the OSMRE Field Representative. Contractor shall install a bulkhead that is sufficient to contain concrete. Contractor is responsible for the integrity of the bulkhead, and for the loss of any concrete if it fails.

END OF SECTION 03 30 00

03 30 00-1 19047-86

31 00 00 - EARTHWORK

SECTION 31 20 00 - EARTHWORK

PART 1 - GENERAL

1.1 Description

Work covered by this section includes excavation within and around the mine feature necessary to accomplish the work; stockpiling excavated material; reuse…