Attch 1 SOW.docx

2020 Red Mountain AML Remediation Project Ridgecrest Field Office

SECTION A -- GENERAL STATEMENT OF WORK

Abandoned Mine Lands (AML) workings pose potential physical safety hazards to the public and our employees. There is a need to remediate these hazards to protect the public from dangerous abandoned mine workings (referred to as “features”).

SUMMARY

The BLM is soliciting proposals from businesses with abandoned mine land remediation experience. Specifically, we are looking for contractors who provide design, fabrication and installation of remediation of physical safety hazards associated with the abandoned mines. The project is located in Kern and San Bernardino County within jurisdiction of the Bureau of Land Management’s (BLM) Ridgecrest Field Office. The project area of mine sites being addressed with this contract are shown in the project map below which are near the town of Johannesburg, CA..

Project General Location Map:

TASK ITEM LIST FOR THIS CONTRACT

The work to be performed is within the BLM’s California Desert District (CDD), Ridgecrest Resource Area.

There are biological restrictions for the work, i.e., bat maternity season and desert tortoise protection measures. Contractors not having participated in the desert tortoise awareness training will have to do so. All work should be outside of the maternity season which typically spans between April 15 to August 15.

SECTION B – DEFINITIONS AND ACRONYMS

Definitions And Acronyms

B 1.1 Definitions.

Mine terms:

Adit – A horizontal mine passage driven in from the surface.

Back – (“roof” in coal mining) – The ceiling of an underground mine working.

Collar – The surface opening to a shaft.

Collar set – The timber, rock, steel or cement stabilizer of a shaft collar.

Country rock – The ground material around an ore body; the ground material into which an ore body was deposited.

Crosscut – A horizontal underground mine passage driven perpendicular to the strike of an ore body, often to intersect an ore body from a drift.

Decline – A mine passage driven from the surface at an upward or downward angle from horizontal; often called an incline when driven at an upward angle; in hardrock usage a decline or incline can be driven from an underground level.

Deadly Gases and Lack of Oxygen can be present in abandoned mines that are not ventilated. Pockets of methane, carbon dioxide, and other deadly gases can form or simply displace oxygen with no visible sign. When these gases enter the body, muscles stop responding normally, thinking becomes clouded, and unconsciousness and death can occur.

Demonstration Test Anchor - An anchor which is performance tested to verify design assumptions and installation practices.

Drift – Usually a horizontal underground mine.

Dump – Waste rock removed by mining and deposited on the surface.

Explosives and Toxic Chemicals were often left behind when an active mining operation was abandoned. Explosives such as dynamite and blasting caps become very unstable over time, and can explode if disturbed. Storage containers, boxes, barrels, and drums deteriorate allowing toxic chemicals to leak or combine into highly dangerous mixtures.

Face – The terminus of an adit, drift, or crosscut; usually the horizontal surface that is being advanced by mining (the working face).

Foot wall – The country rock below an ore body.

Hanging wall – The country rock above an ore body.

Hazardous Materials are a substances or materials that the Secretary of Transportation has determined are capable of posing an unreasonable risk to health, safety, and property when transported in commerce, and has designated as hazardous under section 5103 of Federal hazardous materials transportation law (49 U.S.C. 5103). The term includes hazardous substances, hazardous wastes, marine pollutants, elevated temperature materials, and materials designated as hazardous (see 49 CFR 172.101).

Highwalls and Open Pits are located where large areas of the surface have been disturbed to get at minerals near the surface. Open pits can be filled with water that can be highly acidic or laden with harmful chemicals. Highwalls can be unstable at the top and the bottom and are prone to collapse. When approached from the top, the vertical edge of a highwall may not be seen in time or may crumble, leading to a fatal fall.

Level – Horizontal workings at different elevations (typically numbered 1, 2, 3, etc.).

Manway – A vertical underground passage with ladder for upward or downward movement of miners; can be in a winze, raise, or shaft.

Muck – Waste rock broken in mining and hauled to the surface dump.

Ore body – A mineral deposit removed for its mineral content.

Pillar – Usually a column of ore or coal left to support the back or roof or to support the hanging wall.

Portal – The surface opening of an adit or tunnel.

Polyurethane Foam. Polyurethane foam or “PUF” is a commercially available product consisting of a two part chemical system that is used to block mine openings.

Raise – An underground mine opening driven upward from below to access an overlying ore body or provide access to an upper level.

Rib – The side of an underground opening.

Shafts – Vertical mine openings that can extend hundreds of feet to the lower level of a mine. Open shafts can be concealed by mine debris, dirt, rock, and even water.

Stope – Spaces created in the rock where the ore vein is removed.

Subtle Hazards – More subtle hazards associated with AML’s include encounters with wild animals (e.g., rattlesnakes, Africanized bees, or mountain lions); exposure to bat droppings, hantavirus, radon and radiation; and toxic soil, water, and air contaminated with cyanide, lead, arsenic, mercury, and other toxins which may be inhaled through dust and particles or through contact with impounded acidic water. Africanized bees are common to the California Desert District. These hazards deserve special mention; sites containing bees should be dealt with cautiously or in cold weather.

Unstable Rock and Decayed Support include once solid beams and frameworks that may have been decaying for more than a hundred years. In many cases, there may be no support beams at all and the fractured roof or walls of the mine tunnel eventually collapse in response to vibrations and/or the force of gravity.

Winze – A winze is an opening in an underground mine that is sunk downward (as opposed to a raise, which is mined upward) from inside to connect lower levels. The top of a winze is located underground, in contrast to a shaft where the top of the excavation is located on surface.

B 1.2 Acronyms.

B 1.3 CONTRACTOR

The Contractor shall furnish all personnel, facilities, equipment, materials supplies, and services (except as may be expressly set forth in this contract as furnished by the Government), and otherwise do all things necessary for, or incident to, the satisfactory performance of this contract. Under this contract, the Contractor shall provide the items of work required to remediate physical safety hazards associated with Abandoned Mine Lands (AML). Nothing in this contract calls for work associated with the removal of hazardous materials (as defined by 49 CFR 105.5 (b)), or reclamation of lands which fall under the authority of the Comprehensive Response Compensation Liabilities Act (CERCLA) or the Resource Conservation and Recovery Act.

SECTION C -- REQUIREMENTS AND SPECIFICATIONS

C 1.0 Road Access.

The Contractor may access the project areas from roads indicated on the project maps. BLM will help identify access into each site. Contractors shall note that road conditions may be poorly maintained and should be reviewed for equipment access prior to attempted delivery to a project site.

C 1.1 Site Access.

The Contractor shall transport equipment, supplies and personnel from existing trails and/or roads to the AML features. Access into work areas may be limited in some cases. The Contractor should consider using small vehicles such as All-Terrain Vehicles (ATVs) or a helicopter to accomplish the work. All trail or road improvements shall obtain COR approval prior to construction. All mines are to be surveyed for person(s) living in the mines prior to construction.

C 1.2 Polyurethane Foam (PUF) A PUF closure consists of installing a bottom form, then installing PUF to specifications and backfilling over the PUF to the specified level with common fill (2-feet or more unless otherwise specified). In some instances a cast-in-place concrete slab, rock armoring, or construction of a rock wall may be used to prevent vandalism. Reclamation of disturbed areas may also be specified by the COR.

C 1.2.1 Materials PUF is designed for molding and void filling applications. Co-blown (245FA solvent and water) foams shall have a minimum core density of 2 pounds per cubic foot, closed cell content greater than ninety percent, compressive strength greater than twenty five pounds per square inch, and a minimum installed density of 1.85 pounds per cubic foot. Water (100%) blown foams shall have a minimum core density of 2.5 pounds per cubic foot, closed cell content greater than ninety percent, compressive strength greater than twenty eight pounds per square inch, and a minimum installed density of 2.0 pounds per cubic foot. Either system is ideally 1:1 by volume however pre-metered bags could use an off ratio system. Exothermic reaction rates shall be low for both systems.

C 1.2.2 PUF Safety, Handling and Transport Materials shall be stored per the manufacturer’s specifications. The Contractor shall be responsible for any lost or damaged equipment. In addition damages or claims arising from PUF overspray shall be the responsibility of the Contractor.

C 1.2.3 Backing and Bottom Forms An adit plugs backing or a shaft plugs bottom form and cross members shall consist of any commonly available building materials capable of sustaining an initial lift of 16 inches of PUF. Any combination materials listed in the material table will be acceptable. Alternate materials will be acceptable upon approval by the COR.

When a form is used to support the initial layers of foam, the bottom form and cross members may consist of any commonly available, non-toxic building materials capable of sustaining an initial lift of 16 inches of PUF. Acceptable cross member materials include, but are not limited to, reinforcing steel, 2x4's, dowels, cardboard tubes, and fabric air-inflated plugs. Acceptable bottom form materials include, but are not limited to, plywood, cardboard, paneling, and carpeting. Any combination of the above materials will be acceptable. Alternate bottom forms shall be reviewed with the COR prior to use. The formwork shall be installed at the depth in accordance with the manufacturer’s formula. The depth shall be approved by the COR prior to any formwork.

All forms shall be completed prior to the application of any PUF. The Contractor shall provide the COR with the installed depth to bottom forms for PUF closures. Any breach in the form caused by rock fall or other reason shall be repaired prior to the application of PUF. The Contractor shall be responsible for the integrity of the form and the loss of any polyurethane should it fail.

C 1.3 Portal closures with Wildlife-friendly Gates and Cupolas (Appendix 2-5) This work will consist of fabricating and installing a special gate consisting of steel bars with an inset series of gaps to allow for bat ingress and egress while excluding public access.

When work is being performed on shafts or adits with winzes (internal vertical shafts) workers must wear personal protective fall protection equipment including: a harness system and necessary attachments that meet OSHA fall protection requirements.

C 1.4.1 Materials Gates shall at a minimum consist of:

· 4-inch x 3/8-inch steel angle iron for horizontal bars

· 6-inch x 3/8-inch steel angle iron for horizontal bar hangers

· 4-inch by 3/8-inch steel square tubing for gate columns

· 4-inch by 1/4-inch flat bar for bracing

· Rebar metric Size 25 or Standard #8

· structural steel channel iron, 6-inch by 10.5 pound per foot (lb/ft)

· be constructed of structural steel that conforms to the requirements of ASTM A-36 (all purpose steel) or ASTM A276 (stainless steel); or better.

Structural “I” Beam

· be constructed of structural steel that conforms to the requirements of ASTM A36 / A572 Gr. 50, the standard specification for steel structural shapes for use in general construction.

Wood Lagging

· 3x10 or 3x12 sawmill rough cut lumber Guard rail

· W-rail the meet DOT requirements

C 1.4.2 Gate Installation:

The Contractor is responsible for site inspections and any testing or exploration necessary to ensure that the bid adequately reflects excavation conditions including any hand trimming and leveling required.

The work site shall be cleared and grubbed of vegetation, debris, loose rocks and other items which interfere with construction except items designated by the COR/PI. All trash and debris shall be disposed of at an approved disposal site.

Gates attached to Adit Walls - Wildlife-friendly gates shall be held in place by anchors that have been sunk into competent bedrock. At minimum, one anchor per column will be placed in the floor and ceiling of the mine and one anchor per side of the gate will be placed in the adit walls. Horizontal anchor attachments shall be spaced at 33% and 66% of the height for gates taller than 48 inches, as a general guideline. End anchors must be used on bars that extend more than 30 inches beyond the columns. Anchor holes will be drilled to a depth no less than 6 inches and should be 1-inch or metric equivalent in size. A Metric #25 rebar, or an equivalent steel substitute shall be driven to the depth of each hole and used as the anchoring mechanism. Standards for hole depth, size, and material shall be the same as specified herein.

Channel iron (6”x10.5 lb/ft) spanning the width of the adit floor with pre-cut holes shall be placed tabs down over the anhors and welded in place. Six inch angle irons cut to a length of 6 inches with pre-cut holes are welded to anchors in the ceiling. Columns of the gate shall be welded into place.

Horizontal bars, evenly spaced with gaps equal to 5¾-inch intervals extending to the adit walls are welded in place on Contractor made hangers of each column. To finish the gate, a 4 inch flat iron is welded on the back of the horizontal bars.

Unless otherwise specified, gates are not coated, but any coatings that are applied should be brushed on, not sprayed, to avoid volatiles from entering the cave unless, the steel is pre-coated prior to construction. Adit and cave gates usually are constructed during a season when bats are not vulnerable, or when air is flowing out of the entrance.

Cupola Installation:

The Contractor is responsible for site inspections and any testing or exploration necessary to ensure that the bid adequately reflects excavation conditions including any hand trimming and leveling required.

The work site shall be cleared and grubbed of vegetation, debris, loose rocks and other items which interfere with construction except items designated by the COR/PI. All trash and debris shall be disposed of at an approved disposal site.

The location for a Wildlife-friendly cupola (typically 4-sided and 2 horizontal bars tall) shall be constructed on the perimeter of the mine shaft opening and attached to a concrete foundation (can also be referred to as a cast-in-place collar). A minimum of two concrete anchors shall be used per each side of the foundation. The depth and thickness of the concrete foundation shall be poured to a thickness of no less than 10-inches with at least 6-inches below the surface; exceptions may be made with prior COR approval. This will help prevent water from flowing under the foundation. The concrete may be mixed at the work site or delivered as ready mix at the Contractors option. If the concrete is mixed on site, equipment and mixing procedures shall conform to ACI 301. If ready mix is used it shall be mixed and transported in accordance with ASTM C-94. The concrete mix shall be designed to produce a minimum 3000 psi concrete at the 28 day test. If hot weather concreting is done it shall conform to the requirements of ACI-305. If cold weather concreting is done it shall conform to the requirements of ACI-306. The rate of depositing concrete in forms shall be controlled to prevent deflection of the form panels.

A sill plate consisting of 4-inch flat iron spanning the length and width of the foundation with pre-cut holes shall be placed on top of the concrete anchors and welded in place. This flat iron serves as the sill plate in preparation for the cupola attachment. The cupola columns are made of 4 inch square steel tubing is welded to the sill plate. Intermediate uprights that are not at the corners of the cupola can be made of angle iron. Horizontal bars, evenly spaced with gaps at 5¾" intervals extending the same length as the sill plate, are welded in place on Contractor-made hangers of each column. BLM will identify during the walk through if an access panel or removable bar is needed on the gate, cupola, or raised air-grate.

The Contractor will be responsible for determining where the columns and intermediate columns will be placed and welded on top of the sill plate; and for structure roof support. The roof of cupola’s less than 24 inches tall shall be capable of holding a point load of 6,000 pounds at the center of the roof. Cupola’s greater than 24 inches tall shall be capable of holding a load of 3,000 pounds at the center of the roof. Where possible, support columns should be placed perpendicular to level, no closer than 24 inches apart while maximum spacing should not be more than 120 inches.

To finish the cupola’s roof, structural iron spanning the two longest sides of the cupola and support beams are cut to length, mounted flush to the tops of the columns, and welded along each seam of the upright columns. Welded beads should be no shorter than 2 inches in length. Face plates are either 4 or 6-inch flat irons welded to the ends of the beams or channels to provide the finished look and ties the roof structure together. The cap plates are welded on top of the ends of the beams, perpendicular to the face plates. Cap plates can be either 4-inch or 6-inch flat iron depending on the dimensions of the top of the cupola and the efficiency of materials. Three pound (3 lb.) expanded metal cut-to-fit is then placed on top of the cupola and welded in place. Please grind or smooth all exposed sharp edges to prevent cuts.

SECTION D--SPECIAL CONTRACT REQUIREMENTS

D 1.0 Environmental Interruption of Work The Contracting Officer, by issuance of a suspend work order, may direct the Contractor to shut down any work that may be subject to damage due to weather conditions, fire danger, or because it is impracticable to work during the winter season. The Contractor will be given a resume work order, which will document the date the work suspension ends. An allowance has been included in the contract time for all environmental delays. The count of contract time will therefore continue during all periods of suspension due to normal weather conditions, including fire danger. The Contractor will not be entitled to additional contract time for any suspensions except to the extent that they are due to unusually severe weather conditions. The Contractor will not be entitled to additional monetary compensation for such suspensions regardless of duration.

D 2.0 Safety The Contractor shall be responsible for providing and maintaining a safe working environment in accordance with all applicable Department of Labor, national consensus standards (including supplements) and the Hearing Conservation Program. Before beginning work at the site the Contractor shall be responsible for thoroughly investigating surface and underground site conditions where workers may encounter health and safety hazards, and scheduling and directing his equipment, equipment operations, personnel and safety procedures to prevent accidents and injuries.

D 3.0 Superintendent/Foreman The Contractor shall designate a superintendent/foreman for work performed under this contract.

D 4.0 Fire Prevention

D 4.1 Fire Restrictions The Contractor shall comply with Federal Fire Prevention Regulations and State of California Special Fire Orders applicable to the area. Depending on weather conditions, the Contractor shall be restricted from performing certain operations such as welding or cutting. A copy of these fire restrictions may be obtained upon request at the local BLM Office.

D 4.2 Contractor-Caused Fires The Contractor, whether or not directed by the BLM, shall immediately extinguish, without expense to the Government, all fires on or in the vicinity of the project which are caused by Contractor's employees, whether set directly or indirectly as a result of Contractor operations. The Contractor may be held liable for all damages and costs of additional labor, subsistence, equipment, supplies, and transportation resulting from fires set or caused by the Contractor's employees or resulting from contract operations.

D 4.3 Spark Arresters Each internal combustion engine shall be provided with a spark arrester or spark arresting device approved by the BLM. Exceptions where the BLM may approve mufflers or other equipment in lieu of spark arresters qualified are: (a) small multi-position engines, such as chainsaws, shall meet Society of Automotive Engineers J335b standards; (b) passenger-carrying vehicles and light trucks may have baffle-type mufflers with tail pipe; (c) heavy-duty trucks may have a vertical stack exhaust system and muffler, provided the exhaust stack extends above the cab of the vehicle. An exhaust-driven turbocharger is considered to be a satisfactory spark arrester. Internal combustion engine exhaust systems, arresters, and other devices must be properly installed and maintained.

D 4.4 Power saws For each power saw used in connection with this contract, the following will be provided: Any fueling or refueling of a power saw shall only be done in an area which has first been cleared or is free of all material capable of carrying fire; power saw shall be moved at least 10 feet from place of fueling before starting.

D 4.5 Smoking Smoking shall not be permitted within the contract area except on surfaced or dirt roads, at landings, within closed vehicles, in camps, or at other posted places, and shall never be allowed while working or traveling on foot.

D 4.6 Storage of Fuel and Flammable Products Gasoline, oil, grease, or other highly flammable material will be stored either in a separate building used exclusively for such storage, or at a site where all combustible debris and vegetation is cleared away within a radius of 25 feet. Fire extinguishers and/or sand barrels may be required at such locations specified by the BLM when unusually hazardous conditions exist.

D 4.7 Welding Welding or use of cutting torches will be permitted only in areas that have been cleared or are free of all material capable of carrying fire. Flammable debris and vegetation must be removed from within a minimum of 10 feet radius of all welding and cutting torch operations. A shovel and a 5-gallon standard backpack water container (filled) with hand pump attached shall be immediately available for use in the event of a fire start.

D 4.8 Burning.

Burning of trash and/or debris is not permitted under this contract.

D 4.9 Fire Tools Required during High Fire Danger Season The operator/contractor shall have available the following fire tools for distribution to all personnel on-site:

Number of personnel 1- 4 5 6 7 Type/Number of tools required

In addition to the above handtools, the operator/contractor will provide a backpack pump can filled with water in a readily available area at the project area. All shovels are to be size 0 or larger, long handled. All tools shall be sharp and ready for service.

Fire extinguishers as follows:

D 5.0 Preservation of Pre-Historic, Historic and Archeological Data Public Law 93-291, May 24, 1974, provides for the preservation of scientific, prehistorical, and archeological data (including relics and specimens) which might otherwise be lost due to alteration of the terrain as a result of any Federal project.

The Contractor agrees that should any contractor employee, in the performance of this contract, discover evidence of possible scientific, prehistorical, historical, or archeological data the contractor will notify the COR immediately by phone and then document in writing the location and nature of the findings that shall be submitted to the CO.

Where appropriate by reason of discovery, the CO may order delays in the time of performance and/or changes in the work. If such delays and/or changes are ordered, the time of performance and contract price shall be adjusted in accordance with the applicable clauses in the Contract Clauses Section of this contract.

The Contractor agrees to insert this requirement in all subcontracts which involve the performance of work on the terrain of the site.

D 6.0 Drawings Drawings which appear in this package may are to be used by the contractor when developing a final product. Accordingly, measurements and dimensions should also be provided by the contractor.

D 7.0 Conferences and Meetings

D 7.1 Pre-work Conference Prior to commencement of work, the Contractor shall attend a pre-work conference call to discuss the contract terms, work performance requirements, and safety. Also at this meeting such items as work progress schedule, quality control, camping/worksite plan, and fire prevention plans shall be finalized in writing.

D 7.2 Performance Evaluation Meetings The CO may require the contract manager to meet with the CO, COR and other Government personnel as deemed necessary. The Contractor may request a meeting with the CO when the Contractor believes such a meeting is necessary. Written minutes of any such meetings shall be recorded by the Government in the contract file and signed by the contract manager and the CO or contract administrator. If the Contractor does not concur with any portion of the minutes, much non-concurrence shall be provided in writing to the CO within 10 calendar days following receipt of the minutes.

D 8.0 Camping and Worksite Conditions

D 8.1 Camping and Worksite Plan The Contractor shall provide a general plan with the technical proposal, and shall provide a more specific plan based on items awarded, prior to start work. The Contractor shall be aware of and abide by local BLM camping rules.

D 8.2 Camping Guidelines Except for "special areas" with specific camping regulations, Contractors are welcome to camp anywhere on BLM managed land. Please follow these common sense rules:

D 9.0 Compliance with Applicable Laws All activities conducted under this contract must conform to all applicable Federal, State and Local environmental standards.

In the event environmental laws/regulations/requirements change during the term of this contract, the Contractor shall comply with such law/regulation as changed. If there is an increase or decrease in cost as a result of the change, the Contractor shall immediately inform the CO for possible modification of the contract.

D. 10.0 Hazardous Waste

The Contractor shall manage and dispose of all hazardous waste derived from any work performed under this contract. The hazardous waste shall not be stored on Government property. Federal regulatory requirements include the Resource Conservation and Recovery Act (40 CFR 260- 279) and OSHA worker protection (29 CFR 1910.120).

If the Contractor spills or releases any substance listed in 40 CFR 302 into the environment, the Contractor shall immediately report the incident to the COR. The Contractor shall be liable for any costs associated with the spill or release of such substances.

D 11.0 Wildlife The Contractor at all times shall take appropriate measures to protect wildlife from threat or harm. The Contractor’s employees shall not harass or intentionally cause harm to any wildlife encountered during the activities covered by this contract. Specifically:

· Contractor’s employees shall not feed animals, ie., Chupacabra.

· All trash and debris (especially edible trash) shall be contained in such a way as to prevent the intrusion of animals and all trash shall be removed from public lands at the end of each shift.

· Equipment shall be operated in a safe and reasonable manner to prevent injury to animals crossing haul roads or traversing work areas.

· Features that have a gate prescribed shall have an internal inspection performed prior to the installation to ensure that bats are not hibernating at the gate location and that desert tortoise are not residing inside the mine at the time of installation.

· For features that have an exclusion prescribed the contractor shall take precautions to exclude any wildlife that may be present. The process, which takes several days, allows any wildlife to leave the mine (but not return) at dusk prior to the installation of the closure. If the exclusion has been compromised by the time construction is ready to begin, work must stop and the COR & PI shall be contacted. The COR will discuss this requirement and provide guidance at the pre-bid job walk while on-site at each feature.

D 12.0 Threatened or Endangered Species.

The CDD has consulted with the US Fish and Wildlife Service on small acreage disturbances (< 2 acres) and a Biological Assessment (BA) is in place that will be used for activities in this contract and is referenced in the TO. The Contractor is bound by the specific instruction in the TO as these instructions are based on the site specific BA. A copy of the Small Acreage BA will be made available to bidders upon request.

· The Contractor shall notify BLM of the construction start date.

· Handling of desert tortoise is prohibited.

· As an awardee of this contract you will receive information on the desert tortoise and its conservation, its status, the protection it receives under the Endangered Species Act, and the actions that can be taken to avoid killing or injuring desert tortoises when working or recreating in the desert.

· The Contractor must ensure that construction activities do not result in harm of desert tortoises. This includes abiding by a 25 mph speed limit in wash zones, avoidance of all wildlife burrows in open wash zones, checking underneath vehicles and equipment prior to moving them, disposal of trash in predator-proof containers, and limiting use of open wash zones during tortoise active season.

The Contractor must contact the BLM immediately if a desert tortoise is injured or killed by activities associated with the contract. Construction may continue pending a review of the incident by the BLM and the U.S. Fish and Wildlife Service, provided all other stipulations of this contract have been adhered to.

D 13.0 Contract References It is recognized that in conjunction with many tasks set forth therein, reference is made to United States Department of Interior, Bureau of Land Management, and other directives, instructions and other guidance. It is also recognized that because these documents are written for Government personnel, they may contain language that indicates performance is to be by Government personnel. Whenever such guidance is referenced, the Contractor is to use such references as direction (coded mandatory) or suggested guidance (coded advisory) as appropriate in the performance of the required duties set forth herein and in other sections of the SOW as if such references had been written toward performance by Contractor personnel.

D 13.3 Conflicting References.

Should there be a conflict between or among two or more such references, those coded as mandatory by the contract shall have precedence over those coded advisory; between or among those similarly coded, those issued by a higher authority shall control over those issued by a lower authority; and between or among or among those issued at the same level of authority, those with a later date of issue shall control over those with earlier dates of issue.

D 13.4 Government Authority.

Any duty set forth in the cited references which shall call for the exercise of non-delegable discretionary governmental authority shall be subject to the final approval of the Government official having such authority, notwithstanding that the Contractor may be required thereby to perform duties and render advice at a level below such final approval.

Appendix 1 - Drawing and picture of a Wildlife-friendly Gate

Appendix 2 - Drawing and picture of a Wildlife-friendly cupola

Appendix 3 - Drawing and picture of a Wildlife-friendly stealth cupola lock

Appendix 4 – Drawing and picture of a Raised Air-Grate

Concrete foundation

Appendix 5 – Drawing and picture of a Culvert Gate

Mine Adit culvert Poly Urethane Foam - filler

Appendix 6 – Drawing and picture of a backfill and puf plug

Surface Mine Shaft image4.jpeg image5.png image6.jpg image7.jpeg image8.jpeg image9.jpg image10.jpeg image11.jpeg image12.jpeg image13.jpg image14.png image15.jpeg image16.jpeg image17.jpeg image18.jpeg image2.png image3.JPG