Attachment_1_Specifications-_Statement_of_Work.pdf

DIVISION 1 SECTION 01009

GENERAL REQUIREMENTS GENEARL INFORMATION AND REQUIREMENTS

LFO BLM Lost Creek Basin Reservoir Gabion Baskets Installation.

PART 1: GENERAL

1.1 SUMMARY

A. Description of Work: Contractor shall furnish labor, tools, and equipment to place filter fabric, assemble, install, and fill 125 Reno mattresses (gabions) with rock according to manufacturer instructions. Installation shall consist of double rows of completed mattresses on the water side of Lost Creek Basin Reservoir. Filter fabric, wire mattresses, mattress rock filler, wire/hog rings, and rebar cut-rebar anchor stakes will be provided by the government.

B. Location: Project is SE of Lander. From Lander take Hwy 287/789 SE to Sweetwater

Station Rest area. Continue past the Rest area for approx. 1 mile. Turn south onto

Bison Basin County Rd 281. Continue to Intersection of County Bison Basin Rd and

BLM Bison Basin Rd 3221. Turn and travel southeast on BLM 3221 for approx. 8.5 miles. Turn onto 2 track that goes East on unnumbered road. After 2.5 miles arrive at

Lost Creek Basin Reservoir project site. The work location is shown on map.

1.2 REFERENCES

A. Referenced Specifications/Standards with Abbreviations and/or Acronyms: Wherever the following acronyms are used in these specifications or on the drawings, they are to be construed the same as the respective expressions represented. Copies of the referenced specifications/standards referred to herein may be procured by the Contractor, from the following:

1.3 DEFINITIONS

A. Approvals: Approval of the submittals is an indication that the Contractor's submittals have been reviewed and that there are no objections, except as noted. Approval of deviations shall apply only to those deviations or omissions from the requirements of the drawings and specifications brought to the Contracting Officer's attention in writing.

After approval of an item, submit a substitute for approval when the approved item cannot be purchased or delivered in time to avoid delay in completion of the project.

1.4 SUBMITTALS

A. Scope: Submittals include design computations, shop drawings, manufacturers' literature, as-built drawings, samples, and maintenance manuals.

LFO BLM Lost Creek Basin Reservoir Gabion Baskets Installation.

B. Requirements: Refer to specifications for submittals required. Allow at least ten (10) working days for review. Submittals shall be delivered to the Contracting Officer or

Contracting Office Representative.

C. Identification of Submittals: Completely identify each submittal by showing at least the following information:

1. Name and address of submitter, plus name and telephone number of the individual to contact for further information.

2. Name of project as it appears in these specifications.

3. Contract number, drawing number, and specification section number to which the submittal applies.

4. Whether this is an original submittal or resubmittal.

5. Each item shall clearly note the manufacturer's name and address, trade name, product, lot, style, color, catalog designation or model number, and locations of use.

1.5 CERTIFICATES OF CONFORMANCE

A. Requirements: The Contracting Officer may permit use, prior to sampling and testing, of materials when accompanied by Certificates of Conformance. Materials used on the basis of a Certificate of Conformance may be sampled and tested. Installation of materials on the basis of Certificates of Conformance shall not relieve the Contractor of responsibility for incorporating materials which conform to the requirements of the drawings and specifications. Material not conforming to those requirements will be subject to rejection, whether in place or not.

B. Format: The Certificate of Conformance provided by the supplier shall:

1. State that the named product conforms to the Contract requirements.

2. Either be accompanied with a certified copy of the test results or certify that such test results are on file with the manufacturer and shall be furnished to the

Contracting Officer upon request.

3. Provide the name and address of the manufacturer, the testing agency, and the date of tests.

4. Set forth the means of identification which permits field determination of the product delivered as being the product covered by the certification.

1.6 QUALITY ASSURANCE

A. Codes and Standards: The work shall comply with codes and standards applicable to each type of work and as listed in the individual sections of these specifications. This Contract incorporates materials, applications, and tests by reference, with the same force and effect as when they were given in full text.

B. Conflict: Where a conflict occurs between reference documents and project specifications, the project specifications shall govern.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Delivery: Project materials will be supplied by the government and will be delivered onsite at the start of the project. See section 01019 Government Furnished Property for the full list of project materials.

B. Storage: After delivery according to contractor’s provided schedule, security and storage of materials becomes the responsibility of the contractor. Storage area shall permit access for inspection and handling.

C. Handling: Contractor shall unload and load products protecting them from damage.

1.8 PROJECT/SITE CONDITIONS

A. Access to the Work: Project is SE of Lander. From Lander take Hwy 287/789 SE to

Sweetwater Station Rest area. Continue past the Rest area for approx. 1 mile. Turn south onto Bison Basin County Rd 281. Continue to Intersection of County Bison Basin

Rd and BLM Bison Basin Rd 3221. Turn and travel southeast on BLM 3221 for approx.

8.5 miles. Turn onto 2 track that goes East on unnumbered road. After 2.5 miles you arrive at Lost Creek Basin Reservoir project site. The work location is shown on map.

B. Environmental Considerations: Work shall be contained within the boundaries of the project. No off-road vehicle traffic is allowed. Work can be conducted during wet and muddy conditions as long as damage to roads, terrain, or other environmental resources can be avoided. Repair/restoration/reclamation of damages to roads, terrain, or other environmental resources by the contractor or any of their personnel or entities shall be restored, at the Contractor’s expense, to the same condition they were in at the commencement of work.

1. As the work area is directly adjacent to a sensitive habitat area to the south of the project location, no contracted personnel or equipment shall be allowed in the restricted area at any time. Restricted area is clearly identified by map included with this contract and will also be clearly marked by pin flags, lath, marking tape and/or temporary barriers set by BLM before the start of the project.

C. In order to prevent the spread of noxious weeds, all equipment and vehicles mobilized for the project must be cleaned of mud, debris, and seeds prior to moving to the work site.

LFO BLM Lost Creek Basin Reservoir Gabion Baskets Installation.

1.9 SEQUENCING AND SCHEDULING

A. Work Schedule: The schedule shall be submitted at the pre-work conference. When requested, submit an updated schedule within 3 calendar days. As a minimum, the estimated start and completion dates shall be shown in the estimate.

PART 2: PRODUCTS

Filter fabric, wire mattresses, mattress rock filler, wire/hog rings, and rebar stakes will be provided by the government according to section 01019 Government Furnished Property.

PART 3: EXECUTION

3.1 PROJECT MEETINGS

A. Pre-Work Conference:

1. Will be held prior to the start of work. The Contractor shall be notified in advance of meeting time, date and place. The purpose of the pre-work conference is to review required work, project drawings and specifications, construction schedules, payroll and payments, and administrative provisions of the Contract.

2. The Contractor, subcontractors and the persons responsible for coordination of the work shall be present at the meeting.

3. Be prepared to summarize and explain procedures planned for the project [and present the submittals requested in the specifications].

B. Progress Meetings:

1. To be held at the project site, or as determined by the Contracting Officer.

2. May be called by either the Contracting Officer or the Contractor. Request shall state who should attend and include an agenda.

C. Final Inspection:

1. To be held at the project site, or as determined by the Contracting Officer.

2. Notify the Contracting Officer in writing at least three (3) working days before the completion date so the Government can schedule final inspection.

3. The superintendent shall be present during this inspection.

3.2 PREPARATION

A. Work Limits: Will be established by the Contracting Officer.

B. All dirt prep work and staking of midline and beginning and ending will be performed by

BLM prior to contract start date.

3.3 DISPOSAL OF DEBRIS

A. Requirements: Items or debris not designated as salvage for the Government shall become the responsibility of the Contractor. Disposal of materials in a legal manner and payment of fees required is the Contractor's responsibility. Sale of material onsite is not allowed. When hazardous materials are encountered during demolition operations, comply with applicable federal, state, and local regulations, laws, and ordinances concerning removal, handling, and protection against exposure or environmental pollution. Burning of removed materials is not permitted on the work site.

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT

A. Units: The work described in this section will not be measured for payment.

4.2 BASIS OF PAYMENT

A. Payment: No direct payment for the work described under this section will be made.

Consideration for this item shall be included in the bid price for other items of the

Contract.

END OF SECTION

DIVISION 1 SECTION 01019

GENERAL REQUIREMENTS GOVERNMENT-FURNISHED PROPERTY

GOVERNMENT-FURNISHED PROPERTY

1.1 SUMMARY:

A. Section Includes: Project materials to be furnished by the Government and their locations.

1.2 DELIVERY, STORAGE, AND HANDLING:

A. Location: The Government-furnished property will be provided by the Bureau of Land

Management and will be brought onsite as arranged by the contractor prior to commencement of the project. Once materials are delivered to the site, contractor will take responsibility for security and protection of the materials for the duration of the project.

B. Time: Property will be available onsite during the period of performance of the contract.

C. Return of Unused Property: Return unused material to BLM Lander Field Office

Project Inspector at the completion of the project

D. Loading, Offloading and Transporting Property: The Contractor shall be responsible for providing the necessary material-handling equipment to load and offload all materials required for the project.

2.1 MATERIALS:

A. Materials to be Furnished by the Government:

Specification Section Materials Description Qty Unit

02373 Gabions Gabion Mattresses w/ Tops

Geotech Fabric

Lacing Wire

Hog Rings

Anchoring Stakes (rebar)

EFP*

EFP*

EACH

FEET

ROLL

BOX

EACH

DIVISION 1 SECTION 01019

GENERAL REQUIREMENTS GOVERNMENT-FURNISHED PROPERTY

GOVERNMENT-FURNISHED PROPERTY

Rock Filler** 333.33 YD3

*EFP = Enough for project. All extra will be returned to the BLM.

**Unused gabion rock will be left on site after project completes.

There are no applicable requirements.

4.1 METHOD OF MEASUREMENT:

4.2 BASIS OF PAYMENT:

The Contractor shall include consideration for this item in the bid price for other items of the Contract.

DIVISION 1 SECTION 01500

GENERAL REQUIREMENTS TEMPORARY FACILITES AND CONTROLS

A. Section Includes: Requirements for temporary utilities for construction, sanitary facilities, vehicular access, temporary barriers and controls, and project identification.

1.4 QUALITY ASSURANCE

A. Regulations: Comply with applicable local regulations for haul routes over public highways, roads, or bridges. Comply with industry standards and applicable laws and regulations of authorities having jurisdiction including, but not limited to the following:

1. Health and safety regulations.

2. Environmental protection regulations.

3. Prevention and control of water pollution.

B. Manuals: Comply with latest Manual on Uniform Traffic Control Devices (MUTCD), Part VI.

1.5 EXPLOSIVES

A. Explosives: Shall not be permitted.

1.6 PROJECT CONDITIONS

A. Access Routes: Use only established roadways, areas, and haul routes, or pre-approved temporary roadways, areas, or haul routes .

2.1 UTILITIES

A. General: Electrical power, telephone, heat, and water are not available on the site and will not be provided by the Government.

2.2 TOILET UNITS

A. Temporary Toilet Units: At least one portable, self-contained, single-occupant toilet unit must be provided by, and is the responsibility of the contractor, and must be of the chemical, aerated recirculation, or tank contained type. No combustion type units will be allowed on the work site. Provided units must be properly vented and fully enclosed with a glass-fiber-reinforced polyester shell or similar nonabsorbent material.

2.3 PROJECT IDENTIFICATION

A. Construction Signs: Only signs to expedite deliveries, maintain traffic flow, promote safety, and caution against danger shall be erected, as necessary.

3.1 INSTALLATION

A. Toilets: Install self-contained toilet units specified in Part 2 of this specification section.

Shield toilets to ensure privacy. Use of pit-type privies will not be permitted.

1. Provide toilet tissue, paper towels, paper cups, and similar disposable materials for each facility. Provide covered waste containers for used material.

3.2 HAUL ROUTES, ROADWAYS, PARKING AREAS, AND STORAGE/STAGING

AREAS

A. Examination: Investigate the condition of available public or private roads for clearances, restrictions, bridge-load limits, bond requirements, and other limitations that affect or may affect access and transportation operations to and from the jobsite.

B. Established Roadways as Haul Routes: Use existing available public highways, roads, or bridges as haul routes subject to the applicable local regulations.

3.3 MAINTENANCE AND REMOVAL

A. Maintenance: Maintain temporary structures, facilities, and controls as long as needed for safe and proper completion of the work and as directed by the Contracting Officer.

B. Removal: Remove temporary structures, facilities, and controls as rapidly as progress of the work will permit and as approved by the Contracting Officer.

3.6 CLEANUP

A. Restoration of Storage Area: Upon completion of the project and after removal of materials and equipment from within the area. Restore areas used by the Contractor for the storage of equipment or material, or other use, to the original or better condition.

4.1 METHOD OF MEASUREMENT

4.2 BASIS OF PAYMENT

DIVISION 2 SECTION 02373

GENERAL REQUIREMENTS GABIONS

A. Section Includes: Installing gabions with Contractor-furnished equipment and labor and

Government-furnished property.

2.1 ASSEMBLY AND INSTALLATION (AS PER MANUFACTURER)

Reno (gabion) mattresses are supplied folded flat and packed in bundles. The units shall be assembled individually by erecting the sides, ends, and diaphragms ensuring that all panels are in the correct position (see Fig. 1). Assembly and connections shall be accomplished using lacing wire and/or overlapping fasteners (see Fig. 2).

The procedure for using lacing wire consists of cutting a sufficient length of wire, and first looping and/or twisting to secure the lacing wire to the wire mesh. Proceed to lace with alternating double and single loops through every mesh opening approximately every 6 in. (150 mm) pulling each loop tight and finally securing the end of the lacing wire to the wire mesh by looping and/or twisting.

Stainless Steel overlapping fasteners (hog rings) may be used in lieu of, or to complement, lacing wire for basket assembly and installation.

2.2 Installation

After assembly, the gabion mattresses are carried to their final position and are securely joined together along the vertical and top edges of their contact surfaces using the same connecting procedure(s) described in Section 3.1.

2.3 Filling

Mattresses shall be filled with rock as specified in Section 2.5. During the filling operation some manual stone placement is required to minimize voids. It is also recommended to overfill the baskets by 1 to 2 inches to allow for settling and so that the rock is tightly confined by the Reno mattress lid, thereby minimizing any movement of ht rock under hydraulic load. Care shall be taken when placing fill material to ensure that the sheathing on the PVC coated baskets is not damaged.

2.4 Lid Closing

Once the Reno mattresses are completely full, the lids will be pulled tight until the lid meets the perimeter edges of the basket. A tool like a lid closer can be used. The lid must then be tightly laced and/or fastened along all edges, ends and tops of diaphragm(s) in the same manner as described in Section 3.1.

3.1 MATERIALS

A. SEE SECTION 01019 Government Furnished Property.

PART 4: EXECUTION

4.1 PREPARATION

A. Clearing: Clearing and grubbing will not be required by the contractor.

4.2 INSTALLATION

A. Assembly: Bind together unbound vertical edges with a continuous piece of connecting wire laced around the vertical edges (lacing shall include the heavy perimeter wires), as shown on the drawings. Anchor lacing and lace adjacent gabions along the perimeter of contact surfaces as shown on the drawings. Hooking (hog) rings may be used at 6-inch spacing for basket assembly and connection.

B. Gabions

1. Tiers: Set 2 staggered tiers of assembled gabion units running lengthwise across the dam at locations and to lines and grades as staked by the government prior to the project commencement. Each tier shall be set in place, laced and/or hog ringed, filled with rock filler, and approved by the Project Inspector before lids are laced and/or hog ringed down and successive tiers are placed. Lacing will be required by Project Inspector when baskets assembly, placement, and fill is adequate but less than optimal for prolonged exposure to wave wash.

2. Diaphragms: Where the length of the gabion exceeds its horizontal width, the gabion shall be equally divided by diaphragms, of the same mesh and gauge as the body of the gabions, into cells the length of which does not exceed the horizontal width. Diaphragms shall be tied on the vertical sides. Use lacing wire or hog rings to join adjacent baskets together.

3. Interconnections: Interconnect gabions and check alignment carefully before placing rock filler.

4. Basket Completion: When filling is complete, set lids over to close the basket, and secure lid firmly by lacing shut with connecting wires and/or hog rings according to specifications. The completed gabion mattress midline structure shall be within ± 3 inches of the midline elevations as staked. The surface alignment, including bulges, shall not vary more than 3 inches.

C. Geotextile

1. Placement: The geotextile shall be placed so as to form a filter membrane between soil and gabion mattress. The textile shall be set on previously prepared smooth ground free of obstructions, depressions, and debris. The cloth shall not be laid in a stretched condition but shall be laid loosely with the long dimension perpendicular to the channel centerline. The panels shall be overlapped a minimum of 12 inches.

2. Securing Staples: Shall be placed along a line approximately 2 inches in from the edge of the outer limits of the completed filter cloth area at intervals not greater than 6 feet unless otherwise shown on the drawings. Additional staples shall be installed as necessary to prevent slippage of the filter cloth, regardless of location. Each securing staple shall be inserted through the cloth until the washer or grommet bears against the cloth and secures it firmly to the foundation. Overlaps on vertical faces shall be staggered a minimum distance of 1500 mm (5 feet) between adjacent sheets or sections. The alternate style "U-shaped" staple shall not be used where it cannot be pushed into the ground its full length. If gabions are placed and staked immediately after filter fabric placement, fabric staples will not be needed.

D. Reno Mattress (Gabion) Placement and Alignment

1. Reno Mattresses (gabions) will be two tiered, staggered at the halfway point to the length of the mattresses of the previous row, running lengthwise across the dam, on top of the filter fabric. The gabions will be secured to one another with lacing wire and/or hog rings every six inches on the top edges of all contacting sides across the entire dam. Three rebar stakes will be driven at the top inside edge of each mattress and through the underlying filter fabric to secure all materials of the structure to the dam face. Placement of the stakes will be one stake 24 inches from each corner and one stake in the middle. Stakes will be driven in until only 3 inches remain above the ground. The two bottom end gabions will have two additional stakes put in on the baskets where there is no overlap to the baskets in the previous row to prevent sliding or movement.

E. Rock Filler Placement

1. Do not begin placing of rock filler until installation of the gabion baskets has been inspected and approved by the Project Inspector. Fill gabion baskets with the specified rock material; place rock filler carefully to avoid dislodging internal tie wires, creating voids, or causing bulging or crushing of the basket fabric. Rock shall not be dropped from a height greater than 2 feet. Rock filler will need to be arranged manually to minimize voids and settling. Once the fill has been accepted by the Project Inspector, Gabion lids will be able to be placed.

F. Reno Mattress (Gabion) Lids

1. Gabion Lids will be attached by wire lacing and/or hog rings as determined by the

Project Inspector dependent on how secure the mattress placement and fill has been assembled. Hog rings will be placed at 6 inch intervals across the top of the lid at every point where contact to the basket should be made around the whole of the perimeter and the inner divider(s).

PART 5: MEASUREMENT AND PAYMENT

5.1 BASIS OF PAYMENT

Payment: No direct payment for the work described under this section will be made.

Pay Item Pay Unit

02373(01) Gabion Mattresses Lump Sum