ATTACH_1_-_PLANS_AND_SPECS.pdf

0202993-016 August 22, 2025

Contents

DIVISION 01 00 00 - GENERAL REQUIREMENTS

SECTION 01 10 00 - SUMMARY

SECTION 01 20 00 - PRICE AND PAYMENT PROCEDURES

SECTION 01 32 00 - CONSTRUCTION OBSERVATION AND REPORTING

SECTION 01 33 00 - SUBMITTAL PROCEDURES

SECTION 01 35 29 - SITE SAFETY

SECTION 01 55 00 - VEHICULAR ACCESS AND PARKING

SECTION 01 56 39 - TEMPORARY TREE AND SHRUB PROTECTION

SECTION 01 57 13 - TEMPORARY EROSION AND SEDIMENT CONTROL

SECTION 01 71 13 - MOBILIZATION

SECTION 01 74 00 - SITE RESTORATION

SECTION 01 74 23 - DEMOBILIZATION AND SITE ABANDONMENT

SECTION 01 89 13 - SITE PREPARATION

DIVISION 02 40 00 - DEMOLITION AND STRUCTURE MOVING

SECTION 02 41 13.13 - PAVING REMOVAL

DIVISION 05 01 50 - MAINTENANCE OF METAL FABRICATIONS

SECTION 05 01 50.51 - MAINTENANCE OF BAR GRATINGS

DIVISION 31 00 00 - EARTHWORK METHODS

SECTION 31 20 06 - EARTHMOVING

SECTION 31 34 19 - GEOSYNTHETIC SOIL REINFORCEMENT

DIVISION 31 40 00 - SHORING AND UNDERPINNING

SECTION 31 41 33 - TRENCH SHIELDING

DIVISION 32 10 00 - BASES, BALLASTS, AND PAVING

SECTION 32 12 00 - FLEXIBLE PAVING

8.22.25

Contents | ii

August 22, 2025

ENCLOSURES

Plan C-1 - Regional Map, List of Plans, Symbols, and Notes Plan C-2 - Area Map Plan C-3 - Vicinity and Site Access Map Plan C-4 - Feature IS-010 Existing Conditions Plan Plan C-5 - Feature IS-010 Existing Conditions Section A-A’ Plan C-6 - Feature IS-010 Existing Conditions Section B-B’ Plan C-7 - Feature IS-010 Demolition and Construction Plan Plan C-8 - Feature IS-010 Utility Monitoring Plan Plan C-9 - Feature IS-010 Reclamation and Pavement Details Plan C-10 - Feature IS-010 Roadway Demolition and Tree Restoration Details Plan C-11 - Feature IS-010 Monument Detail

Attachment 1 - Geotechnical Boring Logs Attachment 2 - Geophysical Survey

OSMRE Project No. WA-25-002

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DIVISION 01 00 00 - GENERAL REQUIREMENTS

SECTION 01 10 00 - SUMMARY

PART 1 - GENERAL

The purpose of this project is to abate a subsidence hazard from an abandoned coal mine feature located in the roadway near 750 Valley View Place SW, Issaquah, Washington. This is a historical feature located in this residential street approximately 40 feet south of the intersection with Wildwood Boulevard SW and west of the residence at 750 Valley View Place SW.

• IS-010. In January 2025, when initially investigated, the feature consisted of a single shallow subsidence that generally spanned the width of the roadway in front of 750 Valley View Place SW in Issaquah, Washington. However, the main subsidence area was concentrated on the western side of the road. Subsequent geophysical surveys and geotechnical drilling investigations were conducted in June 2025 to further characterize the subsurface below the surface expression of the feature. A detailed feature description is provided in Section 1.1.

Maps showing the feature location are included on Plans C-1 though C-3. Work will consist of reclaiming the mine feature, as summarized in Section 1.2 and as specified herein and shown on Plans C-4 through C-11. The geophysical survey report and geotechnical drilling logs are provided as attachments following the Plans.

1.1 Mine Feature Locations, Descriptions, and Access

1.1.1 Location/Property Owner and Access

Feature IS-010 is located on Valley View Place Southwest, as noted above, in the northeast quarter of Section 33, Township 24N, Range 06E. The feature is located within the City of Issaquah (City) right-of-way.

The general access route from Seattle to the feature is shown on Plans C-1, C-2, and C-3. There is vehicle access to the site via Wildwood Boulevard SW. City permits will be required for large equipment access for the Contractor during construction.

Important: The extent, depth, and stability of historic mine workings in the project vicinity are unknown.

The area surrounding the feature may contain unstable below-grade mine workings that may be prone to sudden collapse, leading to surface subsidence or collapse that could pose a risk to construction equipment and personnel. The Contractor is responsible for all site safety and should choose construction equipment and methods accordingly.

1.1.2 Feature IS-010 Description

Feature IS-010 is composed of an approximately 44-foot-long (north-south) and 22-foot-wide (east-west), shallow (2-inch-deep) depression/subsidence in the asphalt road that spans the width of Valley View Place SW. The most pronounced/deepest area of the feature (i.e., main subsidence area) is located on the western side of the road, measuring approximately 15 feet long by 8 feet wide. The main subsidence area is up to 2 inches deep at the deepest point, measured from the top of the asphalt curb. The shallow part of the subsidence runs east-west across the entirety of Valley View Place SW and extends a few feet west of the road surface. Slopes within the subsidence vary from approximately 2 to 9 percent with the steepest slopes in the south side of the main subsidence area. The western edge of Valley View Place SW is bound by a 2- to 3-inch-tall asphalt curb that has settled and is partially buried in soil adjacent to the subsidence. West of the curb is a vegetated strip with small trees that transitions to an approximately 3.5-foot-deep drainage ditch to the south. Valley View Place SW slopes approximately 33 feet vertically from its southern terminus down to the intersection with Wildwood Boulevard SW. There are several overhead powerlines along the eastern edge of the road.

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1.2 Mine Feature Reclamation Methods

1.2.1 Feature IS-010

The reclamation for Feature IS-010, as presented in the specifications and shown on the plans, generally consists of the following tasks:

Demolition of Existing Pavement

• Saw, cut, and remove asphalt in two phases, maintaining access for the residents as shown on Plans C-7 and C-10.

• Excavate soil within roadway prism to the depths and phasing specified on Plans C-7 and C-9. All excavated materials to be hauled and disposed of off site.

• Protect all existing active utilities in place and conduct utility monitoring as shown on Plan C-8.

Installation of Reinforced Subbase

• Install geosynthetic reinforcement and place/compact imported aggregate in layers as shown on Plans C-7 and C-9. Place the reinforced subbase in the phases shown on the plans.

• Place crushed surfacing top course (CSTC) on the import aggregate surface to maintain residential access during Phase II demolition and construction, prior to asphalt paving.

Hot Mix Asphalt Paving

• Place and compact crushed surfacing base course (CSBC) as shown on Plans C-7 and C-9.

• Place and compact hot mix asphalt (HMA) pavement as shown on Plans C-7 and C-9.

Site Restoration

• Revegetate the feature reclamation areas that were originally vegetated and disturbed by construction, as shown on Plan C-10.

• Regrade the gravel areas that were disturbed by 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 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 Contracting Officer’s Representative (COR) 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 shall locate utilities prior to work.

The Contractor is responsible for protecting Valley View Place SW, existing public and private utilities, and residential property (e.g., steel plates, lawn protection mats, etc.) to a reasonable degree and/or repairing damage incurred during construction, to its pre-construction condition. The site restoration portion of this design package covers repairs to the road, road shoulder, and adjacent items/landscaping.

The Contractor shall immediately take action 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

01 10 00-3 0202993-016 the Contractor’s employees, directly or indirectly. The Contractor shall notify the appropriate agencies, including OSMRE, of such releases.

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, the Contractor shall contact King County (County) and the City 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 located on a residential street. During construction, access will need to be maintained to the residences. The mine feature and the construction site may be attractive to neighbors and pedestrians that may see the work. 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 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 accomplished without 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, crew performing the work, and hired subcontractors, shall be competent in working around abandoned mine workings, excavating soil, installing geosynthetic and other imported aggregate materials, protecting active utilities and restoring vegetated and paved areas, including asphalt curb construction, as applicable to the work they are performing.

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, a list of equipment, and Contractor qualifications and experience on similar projects, as specified in Section 01 33 00.

The Contractor shall submit a construction schedule, as specified in Section 01 10 00 (3.2).

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

The Contractor shall hold a pre-construction meeting with OSMRE, Haley & Aldrich, Inc. (Haley & Aldrich), and the City to discuss the Contractor’s schedule, submittals, and coordination during construction. The pre-construction meeting will occur on site to allow observation of the mine feature, access to the project site, and a discussion of the work.

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 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 COR and Haley & Aldrich 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 any 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 01 10 00-1 and shall include at least the work items listed therein.

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Table 01 10 00-1 - Construction Schedule Format

Date Feature Item Work Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

IS-010 Mobilize equipment

Access site and prepare work area (staging, TESC, etc.)

Demolish asphalt within Phase I

Excavate in roadway prism within Phase I

Place geosynthetic and backfill layers, and compact backfill within Phase I

Demolish asphalt within Phase II

Excavate in roadway prism within Phase II

Place geosynthetic and backfill layers, and compact backfill within Phase II

Place and compact crushed surfacing base course

Place and compact new Hot Mix Asphalt (HMA) pavement

Replace asphalt and concrete curb in-kind, as needed

Restore site

Demobilize and abandon site

Final Site Walk

Valley View Place SW- Partial Closure Days

END OF SECTION 01 10 00

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SECTION 01 20 00 - PRICE AND PAYMENT PROCEDURES

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 of the items listed on the Bid Schedule. The quantities listed in the bid schedule and 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 (to OSMRE’s satisfaction) and documentation of actual quantities used for unit price items.

All other work required to complete the contract, including, but not limited to: tree and shrub protection, groundwater and surface water control, prevention of trespass, protection of materials, protection of equipment, 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.

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

Contractor shall notify OSMRE of any discrepancies or field changes before installation or fabrication. In case of discrepancies between the existing field conditions and the Contract Drawings, the Contractor shall obtain direction from the OSMRE COR before proceeding. Any change resulting in additional cost would require authorization from the OSMRE contracting officer (CO). The Contractor shall notify the OSMRE COR immediately of conflicts or excessive variations from indicated dimensions.

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, provide traffic control, 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. This bid item also includes all labor, materials, and equipment to clear the site as well as stockpiling and covering the excavated material.

(020) Demolition of Pavement, Excavation, and Disposal of Materials

Payment for “Demolition of Pavement, Excavation, and Disposal of Materials” shall be at the contract lump sum price, which shall include full compensation for all materials, equipment, and labor necessary to remove and haul offsite existing asphalt and underlying soil as specified and shown on the plans. Costs also include labor and equipment related shoring and protection of existing utilities. No extra payment shall be allowed for excavation in different materials whether asphalt, fill, native soil, rock, coal, abandoned utilities, and/or debris.

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(030) Survey and Monitoring of Existing Utilities

Payment for “Survey and Monitoring of Existing Utilities” shall be at the Contractor lump sum price, which shall include full compensation for providing all labor, materials, and equipment necessary for displacement monitoring of existing utilities as specified and shown on the plans.

(040) Import Aggregate

Payment for “Import Aggregate” shall be at the contract unit price per ton, which shall include full compensation for providing all labor, materials, and equipment necessary for import, placement, and compaction of Gravel Borrow.

Measurement shall be based on the weight of material placed, using documentation provided by truck weight tickets to verify the quantity of aggregate material delivered. The weight of the material used shall be documented in the field by the Haley & Aldrich Field Representative based on the truck tickets.

The dimensions of the reinforced subbase to be filled with import aggregate material are OSMRE’s best estimate based on limited information. The actual tonnage of material to be placed shall be determined in the field.

OSMRE shall be liable for the cost of any unused Import Aggregate as long as:

• OSMRE approves the amount of Import Aggregate the Contractor proposes to order before the order is placed, and

• Failure to place the Import Aggregate is solely the result of site conditions, such as the required volume of material needed.

(050) Installation of Geosynthetic Fabric

Payment for “Installation of Geosynthetic Fabric” shall be at the contract unit price per square foot, which shall include full compensation for providing all labor, materials, and equipment necessary for placing the geosynthetic fabric. Limits of placement shall be confirmed by the OSMRE representative in the field at the time of installation.

The area of geosynthetic fabric needed is based on the best estimate of OSMRE and the actual quantity required may vary from the estimate.

Measurement shall be based on the area of continuous intact strips of fabric placed, as measured and documented by the Haley & Aldrich Field Representative.

OSMRE shall not be liable for the cost of any material rendered unusable due to damage caused by the Contractor, or mismeasurement of the required continuous geosynthetic strip lengths.

(060) Import Crushed Surfacing Base Course

Payment for “Import Crushed Surfacing Base Course” shall be at the contract unit price per ton and shall include full compensation for all materials, equipment, and labor necessary for import, placement, and compaction of material.

Measurement shall be based on the weight of material placed, using documentation provided by truck weight tickets to verify the quantity of raw materials delivered. The weight of the material used shall be documented in the field by the Haley & Aldrich Field Representative, based on the truck tickets.

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The dimensions of the paved area where the import aggregate material shall be placed are OSMRE’s best estimate, based on limited information. The actual tonnage of material to be placed shall be determined in the field.

OSMRE shall be liable for the cost of any unused Import Crushed Surfacing Base Course, as long as:

• OSMRE approves the amount of Import Crushed Surfacing Base Course the Contractor proposes to order before the order is placed, and

• Failure to place the Import Crushed Surfacing Base Course is solely the result of site conditions, such as the required volume of material needed.

(070) Hot Mix Asphalt Paving

Payment for “Hot Mix Asphalt Paving” shall be at the contract unit price per ton and shall include full compensation for all materials, equipment, and labor necessary to restore the roadway section, including import, placement, and compaction of Hot Mix Asphalt (HMA) as specified.

Measurement shall be based on the weight of material placed, using documentation provided by truck weight tickets to verify the quantity of raw materials delivered. The weight of the material used shall be documented in the field by the Haley & Aldrich Field Representative, based on the truck tickets.

The dimensions of the pavement area are OSMRE’s best estimate based on limited information.

The actual tonnage of material to be placed shall be determined in the field.

OSMRE shall be liable for the cost of any unused Hot Mix Asphalt Pavement as long as:

• OSMRE approves the amount of Hot Mix Asphalt Pavement the Contractor proposes to order before the order is placed, and

• Failure to place the Hot Mix Asphalt Pavement is solely the result of site conditions, such as the required volume of material needed.

(080) Monument

Payment for “Monument” shall be at the contract lump sum price, which shall include full compensation for all materials, equipment, and labor necessary for installation of the monument at Feature IS-010, as specified and shown on the plans.

(090) Site Restoration & Demobilization

Payment for “Site Restoration & 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, revegetate disturbed areas, restore remaining areas of the site to their pre-construction condition, and abandon the site as approved by OSMRE.

PART 3 - EXECUTION

END OF SECTION 01 20 00

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SECTION 01 32 00 - CONSTRUCTION OBSERVATION AND REPORTING

PART 1 - GENERAL

1.1 Haley & Aldrich Field Representative's Responsibilities

• A Haley & Aldrich Field Representative will be at the project site as appropriate to monitor construction activities and verify that each item is completed, as specified.

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

• The Haley & Aldrich Field Representative will submit Contractor’s and Haley & Aldrich Field Representative’s daily report forms to the OSMRE COR on a weekly basis.

• Neither the presence of the Haley & Aldrich Field Representative nor the observation and/or testing by the Haley & Aldrich 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

• The Contractor shall complete a daily report that shows work accomplished each day, and lists 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 Haley & Aldrich Field Representative.

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

• The Contractor’s on-site Superintendent or alternate pre-approved 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 01 33 00.

Contractor shall submit completed forms for each day’s work to the Haley & Aldrich Field Representative as work proceeds in accordance with Section 01 33 00.

PART 2 - PRODUCTS

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

PART 3 - EXECUTION

END OF SECTION 01 32 00

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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 01 33 00-1.

Table 01 33 00-1 - Summary of Submittal Requirements

Referenced Section Item Minimum Required Submittal Information

01 10 00 Contractor’s Qualification Statement Submit specified information to OSMRE with the bid.

01 10 00 Personnel Data and Proposed Equipment

Submit names of persons who will be working on the project, including subcontractors along with their qualifications and 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.

01 10 00 Construction Schedule Submit a daily schedule of work to be completed for this contract with bid.

01 32 00 Contractor’s Daily Report

Form Submit a blank copy of daily report form three working days before pre-construction meeting and completed forms daily as work proceeds.

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

Submit a safety plan that meets requirements of Washington Administrative Code (WAC) 296 800 14005; three working days before pre-construction meeting.

01 35 29 Traffic Control Plan Submit City approved traffic control plan, including items noted in Section 01 35 29, five working days before pre-construction meeting.

01 74 00 Seed Mix and Fertilizer Submit proposed seed mix and fertilizer and list of trees at pre-construction meeting. Submit a copy of the seed bag label, showing constituents, and size and species of new trees three working days before delivery to site.

31 20 00 Geosynthetic Fabric Submit proposed geosynthetic fabric manufacturer specifications at pre-construction meeting. Submit manufacturer cut sheet and label from delivered geosynthetic fabric upon delivery to site.

31 23 00 Import Aggregate for Reinforced Subbase

Submit two 5-gallon bucket representative samples of import aggregate for reinforced subbase along with the results of grain-size analyses, in accordance with ASTM D 488 to Haley & Aldrich Office for testing at least five working days prior to delivery to site.

32 11 00 Import Aggregate for

CSBC

Submit the results of grain-size analyses, in accordance with ASTM D 488 three working days before delivery to site.

02 41 13.13 31 41 33 32 12 00

Construction Work Plan Submit City approved work plan documenting the phased demolition, shoring, and asphalt paving plan five working days before pre-construction meeting.

32 12 00 Asphalt Contractor Submit the name and experience of the asphalt subcontractor to OSMRE with the bid. The asphalt subcontractor shall demonstrate five years of experience on curb installation projects.

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Referenced Section Item Minimum Required Submittal Information

32 12 00 Hot Mix Asphalt Mix Design

Submit the HMA mix design, including, but not limited to, mix plant name and contact information, aggregate gradation, percent of aggregate in mix, asphalt binder type, percent of asphalt binder in mix, mix plant recommended placement/compaction temperature, emulsified liquid asphalt (tack coat) type, and manufacturer recommended application rate three working days before delivery to site.

Note:

a. Neither OSMRE nor Haley & Aldrich will approve the health and safety plan or be responsible for its adequacy or implementation. Contractor shall be solely responsible for its 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: Cathy Boulware Contracting Officer Acquisition Branch Manager Office of Surface Mining Reclamation and Enforcement U.S. Department of the Interior Denver Federal Center - Bldg. 41 Lakewood, Colorado 80215 Telephone: (303) 236-2935 Email: cboulware@osmre.gov

Cc: Cody Yankey Email: cyankey@osmre.gov

3.2 Submittals During Construction

During construction, submit one original to the Haley & Aldrich Field Representative.

END OF SECTION 01 33 00

mailto:cboulware@osmre.gov mailto:cyankey@osmre.gov

01 35 29-1 0202993-016

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 (L&I) 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 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 01 33 00.

• The Contractor shall submit a general traffic control plan indicating what methods, signs, and anticipated use restrictions (i.e., schedule) will be necessary, as specified in this section and Section 01 55 00. Also submit evidence of City approval of the traffic control plan. Submittals shall be in accordance with Section 01 33 00.

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, and shall address the particular hazards of underground construction or working around an excavation, as applicable.

01 35 29-2 0202993-016

Information can be obtained from Occupational Safety and Health Administration (OSHA; www.osha.gov) and Labor and Industries (L&I, www.lni.wa.gov). The Contractor must submit a copy of the plan to OSMRE, but neither OSMRE nor Haley & Aldrich will 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 temporary orange construction fencing 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 Contractor shall remove loose or unstable material and/or provide rockfall protection and shoring 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.

01 35 29-3 0202993-016

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), as applicable.

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 Revised Code of Washington (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 2018).

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

The Contractor shall call the DNR Industrial Fire Precaution Levels (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 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 Control

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 and/or traffic control plans necessary for completing this work.

The Contractor shall submit a traffic control plan, including any materials used as specified in the submittals Section 01 35 29 1.3. The Contractor shall keep access open to the public as specified in Section 01 55 00. The Contractor should provide adequate traffic control to keep vehicles and pedestrians safe passing through the work area during the entire construction duration, during the day and night.

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

END OF SECTION 01 35 29

01 55 00-1 0202993-016

SECTION 01 55 00 - VEHICULAR ACCESS AND PARKING

PART 1 - GENERAL

1.1 Description

Work covered in this section includes provisions for maintaining vehicular access to the residences adjacent to the construction area. Keep one lane of the road open to the public to provide residents with access to their homes. If unavoidable, coordinate and gain City and OSMRE approval for any closure of both road lanes at least three days in advance of closure. Install, maintain, and remove temporary controls as needed. Vehicular access controls may include, but are not limited to, dividing the construction schedule into two phases, shoring, steel plates, and traffic control, as necessary and requested by the Haley & Aldrich Field Representative, OSMRE, and the City. Construction equipment and vehicular parking shall be planned such that resident access and vehicular traffic is not blocked, and shall be within City right-of-way, unless approved by OSMRE.

PART 2 - PRODUCTS

Not Used.

PART 3 - EXECUTION

3.1 Installation

The Contractor shall have adequate traffic control materials and staff on site during all construction activities.

The Contractor shall

• Provide vehicular access to all residents near the site throughout construction; and

• Provide traffic control as indicated in Section 01 35 29.

• 3.2 Maintenance and Removal

The Contractor shall maintain vehicular access to all residents. The Contractor shall remove vehicular access materials at the end of construction unless approved by OSMRE and the Haley & Aldrich Field Representative.

END OF SECTION 01 55 00

01 56 39-1 0202993-016

SECTION 01 56 39 - TEMPORARY TREE AND SHRUB PROTECTION

PART 1 - GENERAL

1.1 Description

Work covered in this section includes protection of designated trees and shrubs. The Contractor shall install, maintain, and remove temporary controls as needed. Temporary erosion controls include, but are not limited to, delineation fencing, as necessary and requested by the Haley & Aldrich Field Representative and the City.

The Contractor shall complete all construction activities in a manner that minimizes tap root and drip line root disturbance.

Layout of temporary tree and shrub protection shall be coordinated in the field with the Haley & Aldrich Field Representative as the work proceeds.

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 or staging areas.

3.1 Installation

The Contractor shall have adequate delineation around all trees and shrubs that are to remain during all construction activities.

The Contractor shall:

• Minimize work in areas near large roots to prevent damage to existing trees and shrubs.

3.2 Maintenance and Removal

The Contractor shall maintain delineation controls adjacent to disturbed and work areas. The Contractor shall monitor the condition of vegetation and remove any accumulated sediment or equipment from the root zones. Deteriorated or missing items shall be repaired or replaced immediately.

END OF SECTION 01 56 39

01 57 13-1 0202993-016

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, silt fences, or other means necessary and as requested by the Haley & Aldrich 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 Haley & Aldrich 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:

• 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.

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

• Excavate ditches as needed to divert runoff during construction.

• 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. The Contractor shall monitor the condition of siltation fences and straw bales/wattles and remove accumulated sediment. Dispose of accumulated sediment off-site in accordance with state and local requirements, only as approved by the Haley & Aldrich Field Representative. Deteriorated or missing items shall be repaired or replaced immediately.

01 57 13-2 0202993-016

The erosion control measures shall be left in place following the completion of work to discourage erosion prior to the next phase of reclamation work.

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 0202993-016

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, a hand washing or hand sanitizing station, 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

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 COR present at the site, or as requested by the Haley & Aldrich 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 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.

END OF SECTION 01 71 13

01 74 00-1 0202993-016

SECTION 01 74 00 - SITE RESTORATION

PART 1 - GENERAL

1.1 Description

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

1.1 Submittals

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

• Proposed seed mix;

• Copy of the bag label for grass seed mix showing constituents;

• Proposed starter fertilizer; and

• Plant list to replace-in-kind any designated trees or shrubs.

PART 2 - PRODUCTS

2.1 Seed and Fertilizer

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 (USDA).

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.

2.2 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.

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 or supplier’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 of compacted areas with hand tools, if needed.

01 74 00-2 0202993-016

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 an OSMRE Field Representative or Haley & Aldrich Field Representative on site to observe seeding. Any trees removed during construction, as approved by the City and OSMRE, shall be replaced in kind as designated during the pre-construction meeting and approved by OSMRE.

3.2.3 Starter Fertilizer Placement

Starter fertilizer shall be raked into the existing ground surface 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 0202993-016

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 the OSMRE COR.

1.2 Submittals

Not used.

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.

3.2 Removal of Temporary Structures and Equipment

Upon completion of construction and…