ATTACH_A_-_Plans_Specifications.pdf

0202993-014 27 August 2024

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 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 03 00 00 - CONCRETE

SECTION 03 20 00 - CONCRETE REINFORCING

SECTION 03 30 00 - CAST-IN-PLACE CONCRETE

DIVISION 05 01 50 - MAINTENANCE OF METAL FABRICATIONS

SECTION 05 01 50.51 - MAINTENANCE OF BAR GRATINGS

DIVISION 31 20 00 - EARTHWORK

SECTION 31 20 06 - EARTHMOVING

Contents | ii

27 August 2024

ENCLOSURES

Plan C-1 - Regional Map, List of Plans, Symbols, and Notes Plan C-2 - Area Map Plan C-3 - Red Town Trailhead Site and Vicinity Access Map Plan C-4 - Sky Country Trailhead Site and Vicinity Access Map Plan C-5 - Feature CC-064 Existing Conditions Plan and Sections Plan C-6 - Feature CC-064 Reclaimed Plan and Sections Plan C-7 - Feature CC-102A Existing Conditions Plan and Sections Plan C-8 - Feature CC-102A Reclaimed Plan and Sections Plan C-9 - Feature CC-102B Existing Conditions Plan and Sections Plan C-10 - Feature CC-102B Reclaimed Plan and Sections Plan C-11 - Feature CC-322 Existing Conditions Plan and Sections Plan C-12 - Feature CC-322 Reclaimed Plan and Sections Plan C-13 - Feature CC-333C Existing Conditions Plan Plan C-14 - Feature CC-333C Existing Conditions Sections Plan C-15 - Feature CC-333C Reclaimed Plan Plan C-16 - Feature CC-333C Reclaimed Sections Plan C-17 - Features CC-048, CC-049, CC-050, CC-051, CC-052, CC-056, CC-057, and CC-060 Existing

Conditions and Repaired Section and Detail Plan C-18 - Feature CC-118 Existing Conditions and Repaired Plan and Details Plan C-19 - Monument Pipe Detail

OSMRE Project No. WA-24-003 August 27, 2024

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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 hazards posed by three abandoned coal mine features located in King County, Cougar Mountain Regional Wildland Park (CMRWP) in Newcastle, Washington. The features are designated as:

• CC-048, CC-049, CC-050, CC-051, CC-052, CC-056, CC-057, CC-060. These features were previously reclaimed by the Office of Surface Mining Reclamation and Enforcement (OSMRE), and in July 2024 Haley & Aldrich representatives observed that the monument at each feature was illegible.

• CC-064. In July 2024 the feature consisted of a large subsidence.

• CC-102A. In July 2024 the feature consisted of a large subsidence.

• CC-102B. In July 2024 the feature consisted of a large subsidence.

• CC-322. In July 2024 the feature consisted of a large subsidence.

• CC-333C. In July 2024 the feature consisted of a large subsidence.

• CC-118. This feature was previously reclaimed by OSMRE using a welded rebar grate to cover the surface opening. In July 2024, Haley & Aldrich representatives observed an approximately 4-foot-long piece of rebar was missing from the central area of the grate.

Maps showing the feature locations are included on Plans C-1 though C-4. See feature descriptions in Paragraph 1.1 below for dimensions and condition at the time of the site visit. Work will consist of reclaiming mine Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C, as summarized in Paragraph 1.2, as specified herein, and shown on Plans C-5 through C-16, and C-19. Work will also consist of maintenance of monuments at Features CC-048, CC-049, CC-050, CC-051, CC-052, CC-056, CC-057, and CC-060, and the grate at Feature CC-118, as summarized in Paragraph 1.2, as specified herein, and shown on Plans C-17 through C-18. When the term “site” is used herein, it collectively refers to the CC-064, CC-102A, CC-102B, CC-322, CC-333C, CC-048 through CC-052, CC-056, CC-057, CC-060, and CC-118 work sites, access routes, and overall project area.

Important: The extent, depth, and stability of historical mine workings in the project vicinity are unknown. The area surrounding the features may contain unstable 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. See Section 01 35 29 for Site Safety.

1.1 Mine Feature Locations, Descriptions, and Access

1.1.1 Location/Property Owner

All the features are located in the CMRWP, which is owned by King County and operated by King County Parks. CMRWP is located east of the City of Newcastle, Washington, and south of Interstate 90.

The general access route to CMRWP from Interstate 90 (I-90) or Newcastle, Washington to the features is shown on Plans C-1 and C-2. Features CC-048 through CC-052, CC-056, CC-057, CC-060, CC-064, CC-322, and CC-333C, can be accessed from Red Town Trailhead parking lot shown on Plans C-2 and C-3. Features

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CC-102A, CC-102B, and CC-118 can be accessed from the Sky Country Trailhead parking lot via Clay Pit Road as shown on Plans C-2 and C-4.

Motorized vehicles and equipment over 5,000 pounds gross vehicle weight (GVW) are permitted to access Clay Pit Road and Red Town Trail. Motorized vehicles and equipment access on all other trails within the park shall be less than 5,000 pounds GVW. Vehicle and equipment type access is also dependent on the trail width. The Contractor shall verify construction access to each feature.

Approximate access routes to each feature to use for bidding purposes are shown on Plans C-3 and C-4.

The Contractor shall not clear and build new access roads to any of the features. Access to each feature shall be done in such a way that minimal disturbance is made to the existing trail system and vegetation.

1.1.2 Features CC-048 through CC-052, CC-056, CC-057, and CC-060 Description: In July 2024, these previously reclaimed features were generally covered in vegetation, and did not appear to need repair, except for the feature monuments missing their monument markers. The monuments at each feature were constructed similarly, consisting of an approximately 6 5/8-inch outside diameter black painted steel pipe embedded into the soil with about 2 feet of pipe extending above the ground surface. Each pipe was backfilled with concrete with an inlayed octagonal steel plate at the top. The steel plates appeared to have been painted, but the paint is mostly chipped off, and the monument markers are illegible. The existing monument pipes have the feature numbers scratched into the side of the pipe and may not be accurate.

Access to Features: These features can be accessed from the Red Town Trailhead parking lot. See Plan C-3 for the access route to the features.

Features CC-048 through CC-052 can be accessed by heading southwest on China Creek Trail for approximately 1,250 feet, and then turn east off the trail. Walk through the brush approximately 150 feet to reach the monuments for Features CC-048 and CC-049. Continue east another approximately 100 feet to reach Feature CC-050 monument. From there, walk southeast another approximately 75 feet to reach the access gate in the fence surrounding Features CC-051 and CC-052. Once through the gate, continue east, northeast another 50 to 100 feet to reach the monuments for Features CC-051 and

CC-052.

Features CC-056 and CC-057 can be accessed by following Red Town Trail for approximately 1,550 feet, and then turn west onto Rainbow Town Trail and continue for approximately 680 feet. The monument for Feature CC-057 is located approximately 40 feet north of the trail, up the hill. The monument for Feature CC-056 is approximately 30 feet west of the Feature CC-057 monument. The feature numbers scratched into the side of these monuments appear to be incorrect. Feature CC-056 should be west of Feature CC-057.

Feature CC-060 can be accessed via the Bagley Seam Trail from the Red Town Trailhead parking lot.

Follow the trail for approximately 500 feet, then the monument for Feature CC-060 is located about 20 feet east of the trail.

1.1.3 Feature CC-064

Description: In July 2024, Feature CC-064 consisted of an oval subsidence measuring approximately 38 feet long (east-west) by 35 feet wide, and up to 11 feet deep. The side wall of the subsidence is near vertical on the west to northwest side with overhanging vegetation and roots. The side walls around the

01 10 00-3 0202993-014 rest of the subsidence range from 1 Horizontal to 1 Vertical (1H:1V) to 0.5H:1V. The subsidence is surrounded by welded wire fencing that is down on the south side of the subsidence due to fallen trees.

See Plan C-5 for the existing conditions plan and sections.

Access to Feature: From the Red Town Trailhead parking lot, head southwest on China Creek Trail for approximately 260 feet, and then turn south onto the cleared gravel landing. From the edge of the landing there is construction access through brush (i.e., no trail), approximately 160 feet south and down the hill to Feature CC-064. See Plan C-3 for the access route to the feature.

1.1.4 Feature CC-102A

Description: In July 2024, Feature CC-102A consisted of a near-circular subsidence with a diameter ranging from 65 to 75 feet. The side walls of the subsidence were generally 0.5H:1V to near vertical in some locations. Haley & Aldrich representatives measured depths of the subsidence between 23 to 30 feet deep. However, line of sight to the base of the subsidence is obscured by vegetation and woody debris, so it was not clear if the depth measurements were taken at the deepest point of the subsidence. The edges of the subsidence are heavily vegetated, which obscured line of sight to the edge of the subsidence. It is unknown if the base of the subsidence is open to mine workings. See Plan C-7 for the existing conditions plan and sections.

Access to Feature: From Sky Country Trailhead parking lot, go through the access gate and head southeast on Clay Pit Road. After approximately 1,450 feet, turn south onto Cave Hole Trail, and continue for approximately 1,075 feet. Feature CC-102A is located approximately 95 feet west of the trail, and is west of Feature CC-102B. See Plan C-4 for the access route to the feature.

1.1.5 Feature CC-102B

Description: In July 2024, Feature CC-102B consisted of an oblong subsidence measuring approximately 64 feet wide (northeast/southwest) by 75 feet long (northwest/southeast), and up to 30 feet deep. The side walls of the subsidence were generally about 1H:1V slopes. There was light vegetation and several large confers surrounding the edge of the subsidence. The subsidence was not open to mine workings at the time of the site visit. See Plan C-9 for the existing conditions plan and sections.

Access to Feature: From Sky Country Trailhead parking lot, go through the access gate and head southeast on Clay Pit Road. After approximately 1,450 feet, turn south onto Cave Hole Trail, and continue for approximately 1,075 feet. Feature CC-102B is located approximately 20 feet west of the trail. See Plan C-4 for the access route to the feature.

1.1.6 Feature CC-322

Description: In July 2024, Feature CC-322 consisted of a near-circular subsidence with a diameter of approximately 45 feet. The side walls of the subsidence were generally 0.5H:1V on the north side to 1H:1V on the south side. Haley & Aldrich representatives measured depths of the subsidence between 15 to 22 feet deep on the low and high sides of the subsidence, respectively. However, line of sight to the base of the subsidence is obscured by vegetation and woody debris. The edges of the subsidence are heavily vegetated, which obscured line of sight to the edge of the subsidence. It is unknown if the base of the subsidence is open to mine workings. See Plan C-11 for the existing conditions plan and sections.

Access to Feature: From the Red Town Trailhead parking lot, head east on Red Town Trail for approximately 1,550 feet, and then turn west onto Rainbow Town Trail and continue for approximately

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370 feet. Feature CC-322 is located approximately 100 feet north of the trail, and can be accessed from around either the west or the east side of feature CC-082. However, the access to the east of Feature CC-082 is flatter and has less brush. Feature CC-322 shall not be accessed through the Feature CC-082 subsidence. See Plan C-3 for the access route to the feature.

1.1.7 Feature CC-333C

Description: In July 2024, Feature CC-333C consisted of a near-circular subsidence with a diameter ranging from 45 to 55 feet. The side walls of the subsidence were generally 0.5H:1V on the southeast side and 1H:1V on the northwest side. Haley & Aldrich representatives measured depths of the subsidence between 15 to 20 feet deep. The base of the subsidence has a smaller subsidence that may be open to mine workings, but was not safely accessible at the time of the site visit. See Plans C-13 and C-14 for the existing conditions plan and sections.

Access to Feature: From the Red Town Trailhead parking lot, head east on Red Town Trail for approximately 850 feet, and then turn east onto Cave Hole Trail and continue for approximately 1,370 feet. From this point the feature can be accessed through the brush from a low point and natural drainage path east of the trail that leads to the feature over a distance of approximately 250 feet. The drainage path provides access around the north side of the subsidences adjacent to Feature CC-333C.

Feature CC-333C is located approximately 150 feet due east of Cave Hole Trail. See Plan C-3 for the access route to the feature.

1.1.8 Feature CC-118

Description: Feature CC-118 was previously reclaimed by OSMRE and the grate cover was repaired in 2001. The reclamation consisted of an approximately 29-foot square steel rebar grate embedded in concrete surrounding the perimeter of the feature opening. The rebar was approximately 1-inch diameter and spaced at approximately 6-inches on-center in each direction. In July 2024, Haley & Aldrich representatives observed an approximately 4.5-foot-long piece of rebar missing from near the center of the grate.

Access to Feature: From Sky Country Trailhead parking lot, go through the access gate and head southeast on Clay Pit Road. After approximately 4,680 feet, turn south onto Mine Shaft Trail, and continue for approximately 430 feet. Feature CC-118 is located approximately 50 feet west of the trail.

See Plan C-4 for the access route to the feature.

1.2 Mine Feature Reclamation Methods

1.2.1 Features CC-048 through CC-052, CC-056, CC-057, and CC-060 The maintenance at Features CC-048 through CC-052, CC-056, CC-057, and CC-060 as presented in the specifications and shown on Plan C-17, generally consists of the following tasks for each feature:

• Pre-fabricating the concentric steel pipes with the OSMRE-provided brass monument marker embedded in concrete in the smaller steel pipe and concrete-filled annular space (hereafter referenced as a prefabricated monument piece).

• Cleaning the top of each existing monument pipe and inlayed steel plate with a wire brush to remove moss, rust, and flaking paint.

• Welding a prefabricated monument piece to the top of each existing monument pipe.

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1.2.2 Feature CC-064

The reclamation for Feature CC-064, as presented in the specifications and shown on Plan C-6, generally consists of the following tasks:

• Placing structural concrete in the subsidence as backfill in either one or two phases, at Contractor’s own risk. Roughly place the surface of the structural concrete to slope to drain surface water to the northeast.

• Grading the edges of the remaining sidewalls of the feature to provide egress as shown on the plans. Using on-site soil, construct a berm and ditch around the feature, and a ditch starting from the northeast side the feature to direct water away from the feature.

• Installing a steel monument pipe in the structural concrete used to backfill the subsidence.

• Regrading the surface of trails and areas disturbed during construction and revegetating the feature reclamation area and other areas disturbed by construction.

1.2.3 Features CC-102A and CC-102B

The reclamation for Feature CC-102B shall be completed before the reclamation of Feature CC-102A, as presented in the specifications and shown on Plans C-8 and C-10. Feature reclamation generally consists of the following tasks:

• Installing a Contractor-designed temporary bulkhead, or placing the first of two phases of structural concrete in the base of the feature. OSMRE may elect to eliminate the bulkhead based on field conditions during construction.

• For Feature CC-102A only, being prepared to place rebar reinforcement within the first lift of the structural concrete at the discretion of OSMRE.

• Placing remaining structural concrete in the subsidence as backfill. Roughly place the surface of the structural concrete to slope to drain surface water generally to the south, as shown on the plans.

• Grading the edges of the remaining sidewalls of the feature to provide egress as shown on the plans. Using on-site soil, construct a berm and ditch around the north side of the features, and the west side of Feature CC-102A. Construct a berm and ditch starting from the south side of the features to direct water away from the features, as shown on the plans.

• Constructing rolling grade dips across Cave Hole Trail as shown on the plans to limit feature drainage from running along the trail.

• Installing a steel monument pipe in the structural concrete used to backfill the subsidence.

• Regrading the surface of trails and areas disturbed during construction and revegetating the feature reclamation area and other areas disturbed by construction.

1.2.4 Feature CC-322

The reclamation for Feature CC-322, as presented in the specifications and shown on Plan C-12, generally consists of the following tasks:

• Installing a Contractor-designed temporary bulkhead, or placing the first of two phases of structural concrete in the base of the feature. OSMRE may elect to eliminate the bulkhead based on field conditions during construction.

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• Being prepared to place rebar reinforcement within the first lift of the structural concrete at the discretion of OSMRE.

• Placing remaining structural concrete in the subsidence as backfill. Roughly place the surface of the structural concrete to slope to drain surface water to the southeast, as shown on the plans.

• Grading the edges of the remaining sidewalls of the feature to provide egress as shown on the plans. Using on-site soil, construct a berm and ditch around the feature. Construct a berm and ditch starting from the southeast side the feature to direct water away from the feature, as shown on the plans.

• Constructing water bars in the access route north of the trail to disperse surface water into vegetated areas above the trail.

• Installing a steel monument pipe in the structural concrete used to backfill the subsidence.

• Regrading the surface of trails and areas disturbed during construction and revegetating the feature reclamation area and other areas disturbed by construction.

1.2.5 Feature CC-333C

The reclamation for Feature CC-333C, as presented in the specifications and shown on Plans C-15 and C-16, generally consists of the following tasks:

• Installing a Contractor-designed temporary bulkhead in the base of the subsidence.

• Placing structural concrete in the subsidence as backfill. Roughly place the surface of the structural concrete to slope to drain surface water to the north, as shown on the plans.

• Grading the edges of the north and south sidewalls of the feature to provide egress as shown on the plans. Minimize disturbance of the east and west feature sidewalls shared with the adjacent features. Using on-site soil, construct a berm and ditch around the east side of Feature CC-333D.

Construct a berm and ditch starting from the north side the feature to direct water away from the feature, as shown on the plans.

• Constructing water bars in the vegetated area east of the trail to disperse surface water.

• Installing a steel monument pipe in the structural concrete used to backfill material the subsidence.

• Regrading the surface of trails and areas that were disturbed during construction and revegetating the feature reclamation area and other areas disturbed by construction.

1.2.6 Feature CC-118

The maintenance at Feature CC-118, as presented in the specifications and shown on Plans C-18, generally consists of the following tasks:

• Taking appropriate safety precautions due the potential presence of explosive mine gases in this feature that is open to workings before, during, and after the work.

• Cleaning the top of each existing rebar along the planned welding length with a wire brush to remove moss and rust.

• Welding new rebar segments to existing rebar using additional rebar pieces on each side of main replacement rebar piece at each connection (i.e., lap splice).

• Welding intersections of new and existing rebar.

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• Welding intersections of existing rebar where existing weld is cracked or broken, as directed by an OSMRE COR.

• Regrading the surface of trails and areas disturbed during construction and revegetating the feature reclamation area and other areas disturbed by construction.

1.3 Special Conditions

Work shall be accomplished in accordance with these specifications and the plans. Noted dimensions take precedence over scaled dimensions. DO NOT SCALE DRAWINGS.

The Contractor shall locate utilities prior to work.

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 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, rock fall 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 or the King County Parks 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 features are located within 20 to 150 feet of popular, maintained hiking trails and social trails (i.e., unmarked and unmaintained trails used by recreationists) within the CMRWP. The mine features and the construction site may be attractive to pedestrians and other recreationists that may see the work from the trail. The Contractor shall be solely responsible for protecting work areas, underground workings accessible through the work areas, equipment, 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 Paragraph 1.1 and is shown on the plans. No tree removal or other clearing shall be accomplished without OSMRE’s prior 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. King County Parks must approve removal of trees greater than 10-inch diameter at breast height (DBH).

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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, placing concrete, and other fill materials, installing fencing, scaling rock and debris, fall arrest/rope access if needed, and tree removal, 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 Paragraph 3.2. Table 01 10 00-1 presents a typical construction schedule format.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

3.1 Pre-Construction Meeting

The Contractor shall hold a pre-construction meeting with OSMRE, Haley & Aldrich, and King County Parks 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 features, 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 each feature. The project schedule shall show all work that will be performed concurrently.

There is a trail run scheduled in the CMRWP on 27 October 2024. The Contractor shall remove all equipment and vehicles from the trails and restore any construction-related damage or disturbance to the trails prior to the race date, such that all trails within CMRWP are accessible to the public.

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The Contractor’s schedule will be used by OSMRE to determine when the OSMRE Contracting Officer’s Representative (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 26 27

CC-064 Deliver sanitary facilities and mobilize

Access site and prepare work area

Lay concrete line for pumping

Place first phase of structural concrete as backfill

Place optional second phase of structural concrete

Place monument

Grade subsidence edges, construct drainage features

Break down concrete line

Restore site and access

Abandon site and demobilize

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 26 27

CC-102A Deliver sanitary facilities and mobilize

Access site and prepare work area

Lay concrete line for pumping

Install temporary bulkhead at OSMRE's discretion

Install rebar reinforcement at OSMRE's discretion

Place first phase of structural concrete as backfill

Potential second phase of structural concrete placement (see Section 01 20 00)

Place monument

Grade subsidence edges, construct drainage features

Break down concrete line

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 26 27

CC-102B Deliver sanitary facilities and mobilize

Access site and prepare work area

Lay concrete line for pumping

Install temporary bulkhead at OSMRE's discretion

Place first phase of structural concrete as backfill

Potential second phase of structural concrete placement (see Section 01 20 00)

Place monument

Grade subsidence edges, construct drainage features

Break down concrete line

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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 26 27

CC-322 Deliver sanitary facilities and mobilize

Access site and prepare work area

Lay concrete line for pumping

Install temporary bulkhead at OSMRE's discretion

Install rebar reinforcement at OSMRE's discretion

Place first phase of structural concrete as backfill

Potential second phase of structural concrete placement (see Section 01 20 00)

Place monument

Grade subsidence edges, construct drainage features

Break down concrete line

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 26 27

CC-333C Deliver sanitary facilities and mobilize

Access site and prepare work area

Lay concrete line for pumping

Install temporary bulkhead

Place structural concrete as backfill

Place monument

Grade subsidence edges, construct drainage features

Break down concrete line

Features 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 26 27

CC-048,

CC-049,

CC-050,

CC-051,

CC-052,

CC-056,

CC-057, and

CC-060,

Deliver sanitary facilities and mobilize

Access site and prepare work area

Repair existing monuments

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 26 27

CC-118 Deliver sanitary facilities and mobilize

Access site and prepare work area

Weld replacement rebar on grate, and repair existing grate intersections as directed by OSMRE

Restore site and access

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 plant 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

1.2.1 Features CC-048 through CC-052, CC-056, CC-057, and CC-060

(010) Mobilization, Site Preparation, and Site Access – Features CC-048 through CC-052, CC-056, CC-057, and CC-060

Payment for “Mobilization, Site Preparation, and Site Access – Features CC-048 through CC-052, CC-056, CC-057, and CC-060” shall be at the contract lump sum price, which shall include full compensation for providing all labor, materials, and equipment necessary to prepare for the work and for providing all labor, materials, and equipment to establish, improve, and maintain the access routes to accomplish the work. This shall include preparation of submittals;

furnishing bonds (if any) and insurance; acquiring all federal, state, city, and any other local permits; attending the pre-construction meeting; preparing the staging area; purchasing or renting equipment required for safety; transporting equipment and materials to the site; all mobilization costs; and other necessary work.

(020) Monument Repair – Features CC-048 through CC-052, CC-056, CC-057, and CC-060

Payment for “Monument Repair – Features CC-048 through CC-052, CC-056, CC-057, and CC-060” shall be at the contract unit price per monument, which shall include full compensation for all materials, equipment, and labor necessary for each monument repair at Features CC-048 through CC-052, CC-056, CC-057, and CC-060, as specified and shown on the plans.

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(030) Demobilization and Site Restoration – Features CC-048 through CC-052, CC-056, CC-057, and

CC-060

Payment for “Demobilization and Site Restoration – Features CC-048 through CC-052, CC-056, CC-057, and CC-060” shall be at the contract lump sum price, which shall include full compensation for all materials, equipment, and labor necessary to remove equipment and abandon the site, as approved by OSMRE.

1.2.2 Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C

(040-080) Mobilization, Site Preparation, and Site Access – Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C

Payment for “Mobilization, Site Preparation, and Site Access – Features CC-064, CC- 102A, CC-102B, CC-322, and CC-333C” shall be at the contract lump sum price per feature, which shall include full compensation for providing all labor, materials, and equipment necessary to prepare for the work and for providing all labor, materials, and equipment to establish, improve, and maintain the access routes to accomplish the work. This shall include preparation of submittals; furnishing bonds (if any) and insurance; acquiring all federal, state, city, and any other local permits; attending the pre-construction meeting; preparing the staging area; purchasing or renting equipment required for safety; transporting equipment and materials to the site; all mobilization costs; and other necessary work.

(090-120) Temporary Bulkhead – Features CC-102A, CC-102B, CC-322, and CC-333C

Payment for “Temporary Bulkhead – Features CC-102A, CC-102B, CC-322, and CC-333C” shall be at the contract lump sum price per feature, and shall include full compensation for all materials, equipment, and labor necessary to construct and install the Contractor-designed temporary bulkhead. For bidding purposes, the Contractor may assume that the bulkhead must span an opening as shown on the plans.

At the discretion of OSMRE, this pay item may be eliminated from the features depending on actual conditions encountered during construction, except Feature CC-333C. If OSMRE selects the bulkhead, the Contractor may elect to complete a two-phased concrete placement in lieu of a bulkhead at the Contractor’s sole risk of concrete loss into mine workings.

(130-170) Structural Concrete – Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C

Payment for “Structural Concrete - Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C” shall be at the contract unit price per cubic yard for each feature and shall include full compensation for all materials, equipment, delivery, and labor necessary to furnish and place the concrete, as specified and shown on the plans. Limits of the concrete placement shall be as indicated on the plans, or as determined by the OSMRE COR 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.

01 20 00-3 0202993-014

The volume of concrete needed is based on the estimate of OSMRE; the actual volume required may vary from the estimate. Mobilization and demobilization costs associated with “Structural Concrete - Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C”, including placement and removal of concrete conveyance pipe, shall be included in Bid Items No. 040-044, “Mobilization, Site Preparation, and Site Access - Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C,” and No. 060-064, “Site Restoration and Demobilization - Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C.”

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 COR or Haley & Aldrich Field Representative. For concrete mixed on-site, volume measurements shall be based on the cement/redi-mix sacks and quantity of water per sack mixed and placed on-site.

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

• OSMRE approves the amount of concrete the Contractor proposes to order before the order is made; 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.

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.

(180-190) Reinforcing Steel Bars – Features CC-102A and CC-322 – OSMRE Determined

Payment for “Reinforcing Steel Bars – Features CC-102A and CC-322” shall be at the contract unit price per lineal foot of reinforcing steel bar placed for each feature and shall include full compensation for all materials, equipment, and labor necessary to furnish and install the reinforcing bars as shown on the drawings. At the discretion of OSMRE, this pay item may be eliminated depending on actual conditions encountered.

(200-240) Monuments – Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C

Payment for “Monuments – Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C” shall be at the contract lump sum price per feature, which shall include full

01 20 00-4 0202993-014 compensation for all materials, equipment, and labor necessary for installation of each monument at Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C, as specified and shown on the plans.

(250-290) Excavation and Grading – Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C

Payment for “Excavation and Grading – Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C” shall be at the contract lump sum price per feature, which shall include full compensation for all materials, equipment, and labor necessary to grade the remaining side slopes of the features for egress, placing soil cover over the concrete backfill material, and constructing the drainage management around the features or on nearby trails (e.g., berms, ditches, and rolling grade dips).

(300-340) Demobilization and Site Restoration – Features CC-064, CC-102A, CC-102B, CC-322, and

CC-333C

Payment for “Demobilization and Site Restoration – Features CC-064, CC-102A, CC-102B, CC-322, and CC-333C” shall be at the contract lump sum price per feature, which shall include full compensation for all materials, equipment, and labor necessary to remove equipment and abandon the site, as approved by OSMRE.

1.2.3 Feature CC-118

(350) Mobilization, Site Preparation, and Site Access – Feature CC-118

Payment for “Mobilization, Site Preparation, and Site Access – Feature CC-118” shall be at the contract lump sum price, which shall include full compensation for providing all labor, materials, and equipment necessary to prepare for the work and for providing all labor, materials, and equipment to establish, improve, and maintain the access routes to accomplish the work. This shall include preparation of submittals; furnishing bonds (if any) and insurance; acquiring all federal, state, city, and any other local permits; attending the pre-construction meeting;

preparing the staging area; purchasing or renting equipment required for safety; transporting equipment and materials to the site; all mobilization costs; and other necessary work.

(360) Grate Welding – Feature CC-118

Payment for “Grate Welding – Feature CC-118” shall be at the contract unit price per linear foot of welded length, which shall include full compensation for all materials, equipment, and labor to fortify the grate welding as specified and shown on the plans and measured in the field by the OSMRE COR or Haley & Aldrich Field Representative. Mobilization and demobilization costs associated with “Grate Welding – Feature CC-118” shall be included in Bid Item No. 110, “Mobilization, Site Preparation, and Site Access – Feature CC-118”, and Bid Item No. 130, “Site Restoration and Demobilization – Feature CC-118”.

(370) Site Restoration and Demobilization

Payment for “Site Restoration and Demobilization” shall be at the contract lump-sum price, which shall include full compensation for all materials, equipment, and labor necessary to clean

01 20 00-5 0202993-014 the work site of debris and surplus materials and revegetate disturbed areas as required, and abandon the site as approved by OSMRE.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

END OF SECTION 01 20 00

01 32 00-1 0202993-014

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 preapproved by OSMRE shall be on site during all work.

1.3 Submittals

Contractor shall submit a blank copy of the Contractor’s daily report form to OSMRE in accordance with Section 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

01 33 00-1 0202993-014

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 bid.

01 10 00 Personnel Data and Proposed Equipment

Submit names of workers for 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 with the bid.

01 32 00 Contractor’s Daily Report Form

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

01 35 29

Health and Safety Plana 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 74 00 Seed Mix Submit proposed seed mix at pre-construction meeting. Submit a copy of the seed bag label, showing constituents, three working days before delivery to site.

03 02 00 Concrete Reinforcing Steel

Submit certification of size and grade of steel three working days before delivery to site.

03 30 00 Concrete Placement Plan

Submit a concrete placement plan that includes mix proportions, type and quantity of any potential admixtures, and associated mix design number, mixing method, proposed consolidation equipment/plan, and proposed disposal location, pump and hose layout, and other pumping requirements three working days before pre-construction meeting.

05 01 51.51 Grate Welding Submit the following three working days before delivery to site: name and qualifications of Contractor’s certified welder who will perform the welding; and certification of the replacement rebar size and grade of steel.

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.

01 33 00-2 0202993-014

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 e-mail or electronic file transfer:

Attn: Cathy Boulware Contracting Officer F&A Division of Acquisition Management Office of Surface Mining Reclamation and Enforcement U.S. Department of the Interior Denver Federal Center - Building 41 Lakewood, Colorado 80215 Telephone: 303.236.2935 Email: cboulware@osmre.gov

Cc: Lori Ford Email: lford@osmre.gov

3.2 Submittals During Construction

During construction, submit one original to the Haley & Aldrich Field Representative with an email copy to Lori Ford and Haley & Aldrich project manager, except for the Contractor’s Daily Report Forms.

END OF SECTION 01 33 00

01 35 29-1 0202993-014

SECTION 01 35 29 - SITE SAFETY

PART 1 - GENERAL

1.1 Description

The Contractor is responsible for all site safety and should choose construction equipment and methods accordingly. 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/overhang of the mine workings, if applicable, as well as the adjacent slopes, as necessary to ensure safety. The Contractor shall provide and maintain whatever shoring and/or rock supports are required to accomplish the work safely. The Contractor shall be solely responsible for safety at the site, including safety of employees and all others present. The Contractor shall use practices that protect workers and the public when performing all work.

Underground workings and an abandoned mine feature/opening at the ground surface are both in and adjacent to the Contractor’s work area. Dangerous gases from the mine workings may be present.

Depth of cover and degree of underground support in the work area is generally unknown. The Contractor is advised that available information about the extent or condition of the mine workings or other underground hazards at the site may not be complete. The Contractor is advised that the work is in an area where sudden ground collapse may occur without warning.

1.2 Referenced Standards

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

Chapter 296-155 (Safety Standards for Construction Work).

1.3 Submittals

The Contractor shall submit a Health and Safety Plan to OSMRE, including the name and qualifications of the Contractor’s Competent Person responsible for safety, as specified in Section 01 33 00.

PART 2 - PRODUCTS

2.1 Health and…