1240LU24Q0043 Attachment 4 - Rombo Campground Shoreline Stabilization Project - Technical Specifications.pdf

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 1

Technical Specifications

Rombo Campground Shoreline

Stabilization Project

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 2

LIST OF TECHNICAL SPECIFICATIONS

Section 01300 Submittals

Section 01400 Construction Staking

Section 01505 Mobilization and Demobilization

Section 01560 Environmental Controls

Section 01600 Protection of Materials

Section 01640 Owner Furnished Materials

Section 01720 Record Drawings

Section 02140 Dewatering, Fish Salvage and Work Area Isolation

Section 02160 Site Preparation

Section 02200 Earthwork

Section 02900 Seeding

Section 02929 Vegetative Cuttings

Section 02990 Willow Trench

Section 05000 Engineered Large Wood

Section 05001 Vegetated Wood Matrix

Section 05002 Engineered Streambank Fill

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 3

SECTION 01300

SUBMITTALS

PART 1 – GENERAL

1.1 SCOPE

Submittals covered by these requirements include manufacturers’ information, test procedures, test results, samples, requests for substitutions, and miscellaneous work‐related submittals. Submittals shall also include, but not be limited to, rock sources, coir fabric sources, and fabricated items. The Contractor shall furnish all drawings, specifications, descriptive data, certificates, samples, tests, methods, and schedules and other instructions as specifically required in the contract documents to demonstrate fully that the materials and equipment to be furnished and the methods of work comply with the provisions and intent of the contract documents.

1.2 CONTRACTOR’S RESPONSIBILITIES

A. The Contractor shall be responsible for the accuracy and completeness of the information contained in each submittal and shall assure that the material, equipment or method of work shall be as described in the submittal. The Contractor shall verify that all features of all products conform to the specified requirements. Submittal documents shall be clearly edited to indicate only those items which are being submitted for review. All extraneous materials shall be crossed out or otherwise obliterated. The Contractor shall ensure that there is no conflict with other submittals and notify the Engineer in each case where the submittal may affect the work of another contractor. The Contractor shall coordinate submittals among their subcontractors and suppliers including those submittals complying with unit responsibility requirements specified in applicable technical sections.

B. The Contractor shall coordinate submittals with the work so that work will not be delayed. The Contractor shall coordinate and schedule different categories of submittals, so that one will not be delayed for lack of coordination with another. No extension of time will be allowed because of failure to properly schedule submittals.

The Contractor shall not proceed with work related to a submittal until the submittal process is complete. This requires that submittals for review and comment shall be returned to the Contractor stamped “NO EXCEPTIONS TAKEN” or “MAKE CORRECTIONS

NOTED.”

C. The Contractor shall certify on each submittal document that they have reviewed the submittal, verified field conditions, and complied with the contract documents.

D. The Contractor may authorize in writing a material or equipment supplier to deal directly with the Engineer with regard to a submittal. These dealings shall be limited to contract interpretations to clarify and expedite the work.

1.3 STANDARD COMPLIANCE

A. When materials or equipment must conform to the standards of organizations such as, WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 4 but not limited to, the American National Standards Institute (ANSI), American Society for Testing and Materials (ASTM), National Electrical Manufacturers Association (NEMA) and Underwriter’s Laboratories (UL) documents showing, or proving, conformance shall be submitted.

B. If an organization uses a label or listing to indicate compliance with a particular standard, the label or listing will be acceptable evidence, unless otherwise specified in the individual Sections. In lieu of the label or listing, the Contractor shall submit a certificate from an independent testing organization, which is competent to perform acceptable tests, and is approved by the Engineer. The certificate shall state that the item has been tested in accordance with the specified organization’s standard. For materials and equipment whose compliance with organizational standards or specifications is not regulated by an organization using its own listing or label as proof of compliance, a certificate of compliance from the manufacturer shall be submitted for approval. The certificate shall identify the manufacturer, the product, and the referenced standard and shall state that the manufacturer certifies that the product conforms to all requirements of the project Specification and of the referenced standards listed.

1.4 REVIEW OF CONTRACTOR’S INFORMATION

A. When review and checking for acceptance is required of any drawing, or information regarding materials and equipment, the Contractor shall prepare or secure, and submit for review, two (2) copies. The Engineer, after taking appropriate action, will return (1) marked copies to the Contractor. Within 7 calendar days after receipt of said submittal copies, the Engineer will return the marked copies indicating one of the following four (4) actions:

1. If review and checking indicates no exceptions, copies will be returned marked “NO EXCEPTIONS TAKEN” and work may begin immediately on incorporating the material and equipment covered by the submittal into the work.

2. If review and checking indicates limited corrections are required, copies will be returned marked “MAKE CORRECTIONS NOTED”. Work may begin immediately on incorporating into the work the material and equipment covered by the corrected submittal.

3. If review and checking indicates insufficient, or incorrect data, has been submitted, copies will be returned marked, “AMEND AND RESUBMIT”. No work may begin on incorporating the material and equipment covered by this submittal into the work until the submittal is revised, resubmitted, and returned marked either “NO EXCEPTIONS TAKEN” or “MAKE CORRECTIONS NOTED”.

4. If review and checking indicates the material and equipment submittal is unacceptable, copies will be returned marked “REJECTED‐RESUBMIT”. No work may begin on incorporating the material and equipment into the work until a new submittal is made and returned marked either “NO EXCEPTIONS TAKEN” or “MAKE CORRECTIONS

NOTED”.

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 5

B. Approval by the Engineer shall not relieve Contractor from responsibility for any errors or omissions in such drawings, nor from responsibility for complying with requirements of this Contract.

1.5 EFFECT OF REVIEW OF CONTRACTOR’S SUBMITTALS

Review of contract drawings, methods of work, or information regarding materials or equipment the Contractor proposes to provide, shall not relieve the Contractor of their responsibility for errors therein and shall not be regarded as an assumption of risks or liability by the Engineer, or by any officer or employee thereof, and the Contractor shall have no claim under the contract on account of the failure, or partial failure, of the method of work, material, or equipment so reviewed. A mark of “NO EXCEPTIONS TAKEN or MAKE CORRECTIONS NOTED” shall mean that the Engineer has no objection to the Contractor, upon his own responsibility, using the plan or method of work proposed, or providing the materials or equipment proposed.

PART 2 – PRODUCTS

2.1 MANUFACTURER’S DATA

Submittals for each manufactured item shall be comprised of manufacturer’s descriptive literature, drawings, diagrams, performance and characteristic curves, and catalog cuts.

Manufacturer’s name, trade name, model or catalog number, nameplate data, size, layout dimensions, capacity, project specification references, and any other additional information necessary to establish contract compliance shall be clearly indicated.

PART 3 – EXECUTION

3.1 SUBMITTAL PROCEDURE

A. At least 7 calendar days prior to the Contractors need for approval, contractor shall forward to the Engineer all submittals required by the individual Sections of the Specifications.

B. All submittals shall be identified by submittal number and specification section number on the letter of transmittal. Submittals shall be numbered consecutively and resubmittals shall have a letter suffix. For example:

1. First submittal: 05001

2. Resubmittal: 05001A

3. Second resubmittal: 05001B, etc.

3.2 CONTRACTOR SUBMITTALS

Items to be submitted are specified in individual Sections of these Specifications. Submittals

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 6 for each Section shall be bound together in one book. Book shall have numbered tab dividers for each item. Submittals that are related to, or affect, each other shall be forwarded simultaneously as a package to facilitate coordinated review. Uncoordinated submittals will be rejected. Do not combine unrelated materials in the same submittal. Submittals shall be arranged in same order as they appear in the Specification Section. Items shall be clearly marked with the same identification number as indicated on the drawings. The Contractor shall include submittal time appropriate within each item of work on the Construction Schedule.

The Engineer will receive submittals at the preconstruction meeting.

***END OF SECTION***

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 7

SECTION 01400

CONSTRUCTION STAKING

1.1 CONSTRUCTION STAKING

The Contractor shall provide survey staking for construction. The Engineer will provide survey control and grading surfaces for equipment with GPS machine control capability. When the Contractor requires horizontal and vertical control the contractor shall notify the Engineer of this requirement a minimum of three working days in advance of this need.

1.2 STAKEOUT AND MEASUREMENT TO BE PERFORMED BY CONTRACTOR

A. The Engineer will provide an initial layout of the restoration design in consultation with the Contractor. After the initial layout, the Contractor shall be responsible for staking reference points/markers to complete the work from the initial control points and grading surfaces provided by the Engineer, and shall be responsible for all measurements required for the execution of the work. The Contractor shall protect all stakes and shall pay for the time and materials required to replace stakes that have been disturbed or obliterated if necessary.

B. The Contractor shall use information provided by the Engineer to stake the boundaries of construction extents, access roads, staging areas, materials salvage areas, vegetation preservation areas, grading extents and structure locations. The Engineer shall approve staking boundaries prior to commencement of work.

C. The Contractor shall furnish at the Contractor’s own expense, such stakes, equipment, tools, materials, and all labor as required in stakeout of any parts of the work from the control points and grading surfaces provided by the Engineer.

D. The Engineer may require that work be suspended at any time when location and limit marks established by the Contractor are not reasonably adequate to permit checking of the work.

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 8

SECTION 01505

MOBILIZATION AND DEMOBILIZATION

1.1 MOBILIZATION

A. Mobilization shall consist of preparatory work and operations, including, but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidentals to the site; for the establishment of all facilities necessary for work on the project; and for all other work and operations which must be performed, or costs incurred prior to beginning work, on the various items on the project site. Mobilization includes obtaining any permits not provided by the Contracting Agency, and obtaining project‐specific bonds.

B. Mobilization shall also include the construction of temporary ramps and access ways, temporary roads, grading, temporary fencing including highly visible fencing of all wetland edges adjacent to construction limits as marked by Engineer, salvaging of weed free topsoil, removing noxious weeds from areas within the construction limits, and the necessary preparatory work required to allow for the safe and stable movement of all vehicles that are required to construct the improvements outlined in the Contract Documents.

C. Equipment

1 All construction equipment shall be staged in a location and manner to minimize air, soil and water pollution. All equipment shall be washed prior to mobilization to the site to minimize the introduction of foreign materials and fluids to the project site. All equipment shall be free of oil, hydraulic fluid, and diesel fuel leaks. To prevent invasion of noxious weeds or the spread of whirling disease spores, all equipment shall be power washed or cleaned to remove mud and soil prior to mobilization into the project area. It will be the contractor's responsibility to ensure that adequate measures have been taken.

2 Equipment shall be in a well‐maintained condition to minimize the likelihood of a fluid leak. If a fluid leak does occur, the Engineer shall be notified immediately, and all work ceased until the leak has been rectified. At all times during the construction phase, fluid spill containment equipment shall be present on‐site and ready for deployment should an accidental spill occur.

3 Storage of fuel and lubricants ‐all fuel and lubricants shall be stored in containers and areas that are in conformance with the State Department of Environmental Quality, biological opinion or biological assessment terms and conditions, and local, state and federal regulations.

4 Servicing and refueling equipment ‐all fuel and lubricants used in the servicing of construction equipment shall be done in a manner that avoids spills and over filling and shall be done at least 150 feet from all waterbodies. The State Department of

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 9

Environmental Quality shall be notified immediately of any spill and the operator shall contain the spillage.

5 If a spill of chemical pollutants such as fuel or hydraulic fluid should occur, immediately attempt to contain the spilled material. The following procedures shall be followed:

(a) for spillage on land, construct earthen berms or use other suitable barricade material of sufficient size to contain the spill and keep it from spreading.

(b) for spillage on water, attempt to isolate and contain the spilled material.

Commercial booms or other suitable materials shall be kept on site during construction to contain fuel and oil spills on water.

6 Sanitary facilities ‐sanitary facilities such as chemical toilets shall be located at least 150 feet from water bodies to prevent contamination of surface or subsurface water.

1.2 DEMOBILIZATION AND SITE RECLAMATION

A. Demobilization shall consist of work and operations necessary to disband all mobilized items and clean up the site. The removal of all temporary ramps, access ways, roads, signs, temporary fencing, construction debris including rock chips, wood debris, construction stakes, and other construction‐related refuse, and temporary facilities or works and the restoration of surfaces to an equal or better than existing condition, including replacement of salvaged or other topsoil, fertilization based on soil testing, and seeding with a landowner‐approved seed mix, shall also be included as part of demobilization.

B. Site reclamation is included under demobilization. Site reclamation includes reclamation of any other areas not included under A that are disturbed during construction including replacement of salvaged or other topsoil, fertilization based on soil testing, and seeding with a landowner‐approved seed mix, to pre‐project conditions or better.

C. All damaged or disturbed streambanks are to be restored to a natural slope pattern and profile for establishment of permanent woody vegetation.

D. All disturbed streambank and wetland vegetation is to be replaced. Use a variety of species native to the project area, region or as specified on project drawings and specifications. Replant or reseed each area requiring re‐vegetation before the end of the first planting season following construction.

E. Boulders, rock, woody materials and other natural construction materials used for the project shall be obtained beyond the bankfull elevation and at least 150 feet from any water bodies, except for native materials obtained from within the project footprint to be stockpiled and reused on site. Leave native materials, e.g., down wood, where they are found, if possible. If native materials (e.g., downed wood) are destroyed, replace them with a functional equivalent during site restoration.

F. Stockpiled materials (i.e. trees, vegetation, sand, topsoil, and other excavated

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 10 material from restoration project areas) shall be used to rehabilitate areas disturbed by equipment to pre‐work conditions. Short‐term stabilization measures will be implemented until permanent erosion control measures (plant restoration) are effective, and include seeding and planting as specified on project drawings and specifications. Reclamation planting shall be completed no later than spring planting season of the year following completion of construction.

1.3 RELATED WORK:

A. Section 01300 Submittals

B. Section 01560 Environmental Controls

C. Section 01600 Protection of Materials

D. Section 02160 Site Preparation

E. Section 02900 Seeding

Materials and product specifications are included on drawings and in related specifications.

PART 3 ‐EXECUTION

Not used.

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 11

SECTION 01560

ENVIRONMENTAL CONTROLS

1.1 SITE MAINTENANCE

A. The Contractor shall keep the work site, staging areas, and Contractor’s facilities clean and free from rubbish and debris. The Contractor staging area is noted on the drawings.

Materials and equipment shall be removed from the site when they are no longer necessary. Equipment removed as part of demolition shall not be stored on site. Upon completion of the work and before final acceptance, the work site shall be cleared of equipment, unused materials, and rubbish to present a clean and neat appearance.

B. Waste material of any kind will not be permitted to remain on the site of the work or on adjacent roads. Immediately upon such materials becoming unfit for use in the work, they shall be collected, carried off the site, and properly disposed of by the Contractor.

C. The Contractor may provide temporary restroom and cleanup facilities for Contractor’s employees and shall keep these areas clear of all refuse, rubbish, and debris that may accumulate from any source and shall keep them in a neat condition to the satisfaction of the Engineer.

D. In the event that waste material, refuse, debris, and/or rubbish are not so removed from the work by the Contractor, the Engineer reserves the right to have the waste material, refuse, debris, and/or rubbish removed and the expense of the removal and disposal charged to the Contractor.

1.2 AIR POLLUTION CONTROL

The Contractor shall not discharge smoke, dust, and other contaminants into the atmosphere that violate the air pollution regulations for the area. The Contractor shall maintain construction vehicles and equipment in good repair. Exhaust emissions that are determined to be excessive by the Engineer shall be repaired or replaced. If determined to be necessary by the Project Inspector, Contractor shall provide a water truck to manage project area dust.

1.3 NOISE CONTROL

A. The Contractor shall comply with all local controls and noise level rules, regulations, and ordinances which apply to any work performed pursuant to the Contract. If the requirements of this Section are more restrictive than those of the local regulations, the requirements of this Section shall govern.

B. Each internal combustion engine, used for any purpose related to this Contract, shall be enclosed and be equipped with a muffler of a type recommended by the manufacturer. No internal combustion engine shall be operated on the project without said muffler and enclosure.

1.4 STORMWATER AND EROSION CONTROL

A. A Stormwater and Erosion Control Plan for construction activities shall be prepared and

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 12 carried out by the Contractor to prevent pollution related to construction operations.

B. Erosion control measures shall be in place prior to commencing construction. During construction, all erosion controls shall be inspected by the contractor daily to ensure they are working adequately.

1. If inspection shows that the erosion controls are ineffective, work crews will be mobilized immediately to make repairs, install replacements, or install additional controls as necessary.

2. Sediment must be removed from erosion controls once it has reached 1/3 of the exposed height of the control.

C. Contractor shall provide measures to prevent movement of soil into waterways or wetlands identified on the Drawings using filter bags, sediment traps or catch basins, vegetative strips, berms, jersey barriers, fiber blankets, bonded fiber matrices, geotextiles, mulches or compost, wattles or sediment fences.

D. Contractor shall provide measures to prevent stockpile erosion during rain events or when the stockpile site is not moved or reshaped for more than 48 hours, by surrounding piles with compost berms, covering piles with impervious materials or other equally effective methods.

E. Contractor shall provide measures to prevent construction vehicles from tracking sediment offsite or onto roadways where it is subject to washing into storm drains, waterways, or wetlands; including gravel access pads, wheel wash stations, or other equally effective methods.

F. Contractor shall install removable pads or mats to prevent soil compaction in all temporary construction access points and staging areas in riparian or wetland areas.

1.5 SUBMITTALS

A. A Stormwater and Erosion Control Plan for construction activities shall be prepared and carried out by the contractor to prevent pollution related to construction operations.

The plan will include a drawing and narrative that addresses:

1. Site‐specific practices to prevent erosion and sedimentation associated with access roads, stream crossings, construction sites, borrow pit operations, haul roads, equipment and material storage sites, fueling operations and staging areas.

2. Site‐specific practices to prevent construction debris from dropping into any stream or water body, and to remove any material that does drop with a minimum disturbance to the streambed and water quality.

B. Submit in accordance with 01300.

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 13

PART 3 ‐ EXECUTION

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 14

SECTION 01600

PROTECTION OF MATERIALS

Contractor furnished materials shall be shipped, handled, stored, and installed in ways that will prevent damage to the items. Damaged items will not be permitted as part of the work, except in cases of minor damage that have been satisfactorily repaired and are acceptable to the Engineer. Materials supplied by the Owner shall be protected as contractor furnished materials upon delivery to the project site.

PART 2 ‐ PRODUCTS

3.1 DELIVERY OF MATERIAL

The Owner’s and Engineer’s personnel will not accept material deliveries for the Contractor.

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 15

SECTION 01640

OWNER FURNISHED MATERIALS

Owner will designate items and materials for Contractor to harvest and deliver to the work area. The Contractor shall coordinate handling, delivery, and storage for each material.

The Owner will not supply but provide the location to obtain the following materials:

• Category 1 wood

• Category 2 wood

• Category 3 wood

• Rock

• Vegetative cuttings

• Backfill

• Seed mixes

The Owner may provide additional materials as needed.

3.1 DELIVERY OF MATERIAL

Wood materials will be delivered to the staging areas and will be placed into piles of like material. The Owner shall deliver product data, samples, tests, and certificates to the Contractor. The Contractor shall handle products once on‐site, including storage and transportation to points of installation. The Engineer will not accept material deliveries for the Owner or Contractor.

3.2 PROTECTION OF MATERIALS

Materials supplied by the Owner shall be protected as contractor furnished materials upon delivery to the project site as per Section 01600.

3.3 CONSTRUCTION DELAY

If Owner furnished items cause delay in the critical path schedule, the Contractor shall notify the Owner in writing. Only changes to the critical path shall be considered as evidence for changes in contract time.

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 16

SECTION 01720

RECORD DRAWINGS

This section describes requirements for the preparation and maintenance of the project record drawings used to document as‐built conditions based on field changes and modifications.

2.1 PROJECT RECORD DRAWINGS

The Contractor shall maintain a neatly and accurately marked set of record drawings showing the final locations and layout of all structures, grading, planting and other facilities. Drawings shall be kept current weekly, with all work instructions and change orders; and construction adjustments. Drawings shall be subject to the inspection of the Owner and Engineer at all times, and progress payments, or portions thereof, may be withheld if Drawings are not accurate and current. Prior to acceptance of the work, the Contractor shall deliver to the Engineer one (1) set of neatly marked record drawings, accurately showing all the information required above.

The record drawings shall include the final locations and details of the project with changes/modifications clearly marked in red.

***END OF SECTON***

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 17

SECTION 02140

DEWATERING, FISH SALVAGE AND WORK AREA ISOLATION

1.1 DESCRIPTION

A. This section provides performance standards for dewatering systems and it is intended that the Contractor will provide site specific details as to their proposed way of dewatering the site during construction.

B. Fish salvage provisions are included in this section.

C. The Contractor shall comply with all applicable Tribal, federal, state, and local laws and regulations concerning environmental pollution arising from construction activities. All permit conditions must also be adhered to by the Contractor.

1.2 SUBMITTALS

A. Before dewatering is commenced, the Contractor shall obtain the acceptance of the Engineer for the method, installation, and details of the proposed dewatering system.

The Contractor shall submit plans in accordance with Section 01300 (Submittals) setting forth any deviations or additions to the proposed dewatering channel. If applicable, the dewatering system plans, at a minimum, shall indicate the following:

1. Sizes of pumps, discharge piping, and piping appurtenances.

2. The personnel responsible for monitoring the dewatering system and dewatered excavations. The contact person must be available at all times or a designated person must be specified in their absence.

3. Provisions to confine fuel and oil spills in the event of their occurrence.

4. Plans to segregate construction water (contaminated with form oils, concrete residues, etc.) from clean water.

5. Plans to dispose of the construction water and residue solids.

6. A contingency plan must be provided as part of the approved plan that outlines next steps if the initial plan does not work satisfactorily.

B. The Contractor’s dewatering plan must include the designed bypass channel and be approved by the Engineer, and those provisions in place, prior to in‐water excavation.

In addition, in accordance with Section 01300 (Submittals), the Contractor shall submit a plan to coordinate and participate in the fish salvage operations. The Owner will provide fisheries biologists and fish capture equipment to lead the fish salvage effort.

The fish salvage plan, at a minimum, shall indicate the following:

1. List of equipment and materials that the Contractor will provide to be used in fish salvage.

2. A personnel and staffing plan to aid in fish salvage, including a description of staff roles and responsibilities in fish salvage. The plan shall outline how the Contractor

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 18 will facilitate the Owner's fisheries biologist fish salvage operations on‐site to ensure safe personnel working conditions around the construction site.

C. The Contractor’s Fish Salvage plan must be approved prior to in‐water excavation.

1.3 QUALITY ASSURANCE

A. The Owner and Engineer shall be notified at least 48 hours in advance of commencing dewatering activities.

B. The Engineer or representative shall be present during initial dewatering.

C. The Owner and Engineer shall be notified at least 72 hours in advance of commencing fish salvage operations.

D. Fish salvage operations shall not commence until dewatering systems are in place and operating.

PART 2 – MATERIALS

Not Used

3.1 GENERAL

A. The Contractor shall furnish, install, operate, and maintain all machinery, appliances, and equipment to maintain all excavations free from moving water during construction, and shall dewater and dispose of the water so as not to cause injury to public or private property, or to cause a nuisance or menace to the public.

B. The control of groundwater shall be such that softening of the bottom of excavations, or formation of “quick” conditions or “boils,” does not occur. Dewatering systems shall be designed and operated to prevent removal of the natural soils.

C. Dewatering systems shall operate continuously until project construction has been completed, or at a minimum, construction within a reach has been completed.

D. The Contractor shall be fully responsible and liable for all damages, including flotation of structures, which may result from failure to adequately keep excavations dewatered.

3.2 DISPOSAL OF WATER

A. The Contractor shall dispose of water resulting from the dewatering operation in a suitable manner without damage to adjacent property and in accordance with all federal, state, and local laws and regulations. Sediment‐laden water should be discharged to adjacent ground and not allowed to return to the stream until sediments have been removed from the sediment‐laden water.

B. Clean, uncontaminated water resulting from dewatering operations must be returned to the stream.

3.3 FISH SALVAGE

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 19

The Contractor shall assist in the salvage of fish and aquatic organisms from the isolated work areas in cooperation with the Owner’s fisheries biologist. Isolation of the work area, fish removal, and release of fish will be conducted or directed by the Owner's fisheries biologist who possesses the competence to ensure safe handling of all Endangered Species Act (ESA) listed fish and other aquatic organisms, and who is also experienced with work area isolation techniques.

A. Species of Concern

From a fish salvage standpoint, the primary focus will be on species of concern as identified by ESA listing and as classified as game fish by fisheries agencies. However, a reasonable attempt will be made to salvage all aquatic species and fish with the available resources.

B. Isolation

The quickest and safest way to minimize potential harm to fish and aquatic resources is effective isolation of the work areas. Work area isolation shall comply with provisions listed on the drawings, and described in these specifications.

C. Removal

In cofferdam work areas and other isolated areas, the first step will be to reduce the volume of water to the fullest extent possible to help consolidate fish and improve salvage efforts. By reducing the water volumes, it will be easier to improve capture and salvage success using seine nets and electrofishing equipment, if necessary. Reducing water volume will be done using powered pumps with appropriate pumping capacity.

To reduce fish exposure, pump intakes will be set near the water surface and fitted with approved wire fish screens that prevent impingement or entrainment of fish.

Water will be drawn down in a controlled manner with fish salvage crews continuously monitoring the pumps, newly exposed areas, and fish numbers for crowding and stranding. If isolated pockets or pools are uncovered, they will be de‐fished with dip nets and electrofishing equipment will be used if necessary. Pumping will be reduced once manageable water levels are obtained that can easily be waded and de‐fished.

After waters are reduced to a manageable level, seine nets will be used in order to remove fish from the isolated in‐water work site. An on‐site biologist will determine the pass methods and the number of times each area will be seined. Once the seining becomes ineffective, areas conducive to electrofishing may be electrofished by the on‐ site biologist. If electrofishing is necessary to adequately de‐fish the area the following requirements will be in place:

Electrofishing will only be conducted when a biologist with 100 hours of electrofishing experience is on‐site to conduct or direct all activities associated with capture attempts in accordance with "Guidelines for Electrofishing Waters Containing Salmonids Listed under the Endangered Species Act" (NMFS 2000).

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 20

SECTION 02160

SITE PREPARATION

This section specifies site preparation which consists of clearing, grubbing, and disposal of materials.

1.2 JOB CONDITIONS

A. Existing Conditions

The Contractor shall determine the actual condition of the site as it affects this portion of work.

B. Protection of Existing Facilities

Site preparation shall not damage existing structures, landscaping, fencing, gates, or vegetation adjacent to the areas designated for site preparation. The Contractor shall repair or replace any and all damaged property.

1.3 RELATED WORK:

Section 01400 Construction Staking

Section 01505 Mobilization and Demobilization

Section 01560 Environmental Controls

3.1 CLEARING AND GRUBBING

A. General

All areas comprising the work shall be cleared and grubbed in accordance with the requirements of this section.

B. Clearing and Grubbing

Preservation of existing vegetation and trees is of utmost importance. The Project Inspector will flag and walk the entire site with the Contractor's representative to clearly mark the clearing limits and vegetation to be saved or salvaged as specified on project drawings and specifications. Within the limits of clearing, the areas below the natural ground surface shall be grubbed to a depth necessary to remove all stumps, roots, buried logs and all other

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 21 objectionable material of any kind.

C. Noxious and Invasive Species

Noxious or invasive species shall be marked in the field by the Engineer prior to mobilization and these areas shall either be avoided if possible or material shall be grubbed and handled in accordance with applicable Tribal, state and local laws regarding handling of noxious or invasive weed species.

D. Top Soil Salvage

Where clearing and grubbing requires removal of top soil, this material shall be salvaged from areas free of noxious or invasive species, or where noxious and invasive species have been effectively treated prior to removal of the soils, and stockpiled for later use in site reclamation.

3.2 PROTECTION

The Contractor shall provide protection devices or demarcation of areas outside the project site to be avoided and protected.

3.3 CLEANUP

Debris, rubbish, and excess material resulting from the clearing and grubbing process shall be removed from the site in a manner that will prevent spillage on streets or adjacent areas.

Spillage shall be removed from streets and adjacent areas. Applicable Tribal, Federal, State, and local hauling disposal regulations shall be complied with. Cleanup shall be an on‐going activity throughout the contract period.

3.4 DISPOSAL OF MATERIALS

All debris, rubbish, and excess material removed during clearing and grubbing work shall become the property of the Contractor and shall be removed from the project site at the Contractor’s cost. Contractor shall make his own arrangements for disposing of these materials outside the project site and he shall pay all costs involved. Arrangements shall include, but not be limited to, entering into agreements with property owners and obtaining necessary permits, licenses, and environmental clearances.

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 22

SECTION 02200

EARTHWORK

1.1 DESCRIPTION OF WORK

The Contractor shall furnish all labor, materials, equipment, and incidentals necessary to perform all excavation, backfill, grading, hauling, and compaction required to complete the work shown on the Drawings, and specified herein. The work shall include, but not necessarily be limited to excavation, backfilling and grading for structures; excavation, backfill and grading for streambanks and channels; placement of rock materials for channels and structures;

disposal of surplus and unsuitable materials; and all incidental related work.

1.2 QUALITY ASSURANCE

A. The Contractor shall use equipment with survey‐grade GPS capability, and the Engineer shall furnish the Contractor with computer files representing finished ground surfaces and structure subgrade for use with GPS equipment. The Contractor is responsible for checking grade to assure grading is in accordance with design surface provided by the Engineer.

B. The Engineer shall inspect excavation, backfill, and re‐graded surfaces, and will either approve or reject grading based on conformance with design surface, the Drawings, and these specifications.

1.3 APPLICABLE PUBLICATIONS

USDA NRCS. 2017. Practice Code 582 – Open Channel.

1.4 RELATED WORK

A. Section 01560 Environmental Controls B. Section 02160 Site Preparation C. Section 05000 Engineered Large Wood D. Section 05001 Vegetated Wood Matrix

2.1 EXCAVATION AND BACKFILL VOLUME ESTIMATES

All volumes reported on the Drawings are based on estimates from terrain model surfaces.

Earthwork quantities reported on the Drawings do not include subgrade quantities or quantities of imported materials such as logs and rock. Earthwork quantities reported on the Drawings do not include adjustment factors to account for moisture or compaction. The Contractor shall use the surfaces provided by the Engineer to confirm earthwork quantities.

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3.1 GENERAL

A. Control of Water

The Contractor shall keep excavations free from water during construction.

B. Surplus Material

Unless otherwise specified, surplus excavated material shall be disposed of at the Contractor’s expense. The Contractor shall confirm that there is sufficient material available for the completion of the work before disposing of any material inside or outside the site. Shortage of material, caused by premature disposal of any material by the Contractor, shall be replaced at the Contractor's expense.

C. Hauling

When hauling is done over highways or streets, the loads shall be trimmed and the vehicle shelf areas shall be cleaned to avoid spillage.

D. Maintenance of Roadways

All earthwork operations shall be performed in a manner which does not disrupt the continuous flow of traffic on existing roadways. All public streets shall be swept clean daily where dirt and debris result from Contractor’s operations.

E. Finish Grading

Finish grades and existing or natural grades in the area of work are indicated on the plans.

The Contractor shall do all grading, filling or excavating as required to completely grade the site to lines and grades shown. Where finished grade corresponds practically with existing grade, the ground shall be worked up and graded off evenly with existing grade. Filled areas shall be compacted so as to prevent settlements and the Contractor shall be responsible for a period of one year after final acceptance of the project to provide additional fill as necessary to bring to grade any areas which settle below the indicated grades and to replace or repair any planting or work damaged by such settlement.

G. Tolerances

Finished grade shall be to the line and grade shown on the plans to within a vertical tolerance of plus or minus 0.3 feet for general grading and for structures. Allowance for topsoil and grass cover, and sub‐base and pavement thickness shall be made so that the specified thickness can be applied to attain the finished grade. Horizontal tolerance shall be plus or minus 1.0 feet for grading and structures.

H. Control of Erosion

The Contractor shall maintain earthwork surfaces true and smooth and protected from erosion.

I. Over‐excavation of Unsuitable Soils Where organic materials, yielding subgrade, or other deleterious materials are encountered during excavations, they shall be removed, as directed by the Engineer. The

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 24 resulting excavation shall be backfilled with material approved by the Engineer. The Contractor shall promptly notify the Engineer if these materials are encountered and over‐ excavation shall not proceed without approval of the Engineer.

3.2 EXCAVATION

A. General

Excavation shall be in accordance with the grading plan indicated on the Drawings and as required for construction. Excavations shall be kept free from water while construction is in progress. The Engineer shall be notified immediately in writing in the event that it becomes necessary to remove soft, weak, or wet material.

Soil disturbed or weakened by the Contractor’s operations and soils permitted to soften from exposure to weather shall be excavated to firm foundation and refilled with material approved by the Engineer. All work of this nature will be at the Contractor’s expense.

3.3 SUBGRADE PREPARATION

Ground surfaces receiving engineered fill shall be prepared by clearing and grubbing as specified in Section 02160, Site Preparation, and by removing soil which is high in organic content and other deleterious material. Removed topsoil that is high in organic content and not occurring within areas of existing weed infestations, or is otherwise suitable as growth media, should be stockpiled for later use in site reclamation as described in Section 02160, Site Preparation.

3.4 SALVAGE, SORTING AND STAGING SPECIFIED CATEGORIES OF SUBSTRATE

A. The Contractor shall salvage specified materials prior to excavation or backfilling.

B. The Contractor shall sort and mix excavated materials to generate volumes of specified substrate categories identified on the Drawings. Sorting and mixing shall occur in conformance with gradations specified in Section 05001 Engineered Streambed Fill.

C. The Contractor shall stage at an approved staging area salvaged and sorted materials for use during construction.

3.5 FILLING OPERATIONS

Filling operations must comply with criteria specified in the Drawings.

3.6 COMPACTION

Compaction requirements for individual fill components shall comply with specifications listed on the Drawings. Compaction for finished ground surfaces created from fill shall be in one foot lifts using the weight of equipment with minimum weight of 15 tons, unless specified otherwise on the Drawings. Compaction of fill within structures shall be by equipment bucket compaction unless specified otherwise on the Drawings.

3.7 CLEAN UP

After completing all earthwork, the Contractor shall leave the site in a neat and clean condition, doing such grading as is required by the plans. Any existing features, structures, and other facilities damaged or affected by the work shall be replaced, repaired, or restored to their original condition or better.

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SECTION 02900

SEEDING

DESCRIPTION:

This section specifies seeding including seed acquisition, seed bed preparation, broadcast seeding, and drill seeding. The Contractor shall provide all labor, tools, equipment, and incidentals necessary to complete the Work as specified.

1.1 RELATED WORK:

A. Section 01300 Submittals B. Section 01505 Mobilization and Demobilization C. Section 01560 Environmental Controls D. Section 01600 Protection of Materials E. Section 01640 Owner Furnished Materials F. Section 02160 Site Preparation

1.2 QUALITY ASSURANCE:

A. The Engineer shall mark by flags or stakes the outer extent of each seeding location prior to seeding.

B. The Engineer shall be notified at least 48 hours in advance of seeding.

1.3 SUBMITTALS:

A. Submit in accordance with Section 01300, Submittals.

B. Proposed substitutions if species included in the Drawings are not available.

Alternative seed mixes shall be approved by the Engineer.

C. Seeding equipment and contractor qualifications shall be approved by the Engineer.

D. Seed bed preparation shall be inspected and approved by the Engineer prior to seed application.

1.4 APPLICABLE PUBLICATIONS:

ANSI Z60.1‐2014 American Nursery and Landscape Association: American Standard for Nursery Stock

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2.1 SEED

The Contractor will specify the seed mix specified by the Contracting Officer. If species are not available, any changes in seed mix must be approved by the Engineer prior to purchase of seed.

If species substitutions are requested, the Engineer shall provide the Contractor with updated seed mixes that include the approved substitutions and updated seeding rates.

The Contractor shall keep seed cool, dry, and rodent free after delivery.

2.2 GROWTH MEDIA

Growth media shall consist of salvaged and stockpiled topsoils as described in Section 02160, Site Preparation, or other approved on‐site or off‐site sources of topsoil, with similar texture and chemistry properties as the native soil, that is approved by Engineer.

PART 3 – EXECUTION

3.1 SEED BED PREPARATION

The Engineer shall mark seeding areas with flags and/or stakes, indicating extents for each seed mix. The final seeding acreage shall be provided to the Contractor by the Engineer prior to seeding.

The Contractor shall ensure that all surfaces to be seeded are properly prepared. Seed bed preparation methods vary depending on the final grading surface conditions, the seed application method, and the final restoration or reclamation surface designs.

Reclaimed access routes and staging areas shall be decompacted and left without large clumps or blocks of soil prior to seeding. Equipment traffic on access routes with fine textured soils may compact lower soil layers and additional topsoil may be needed to achieve the pre‐ project elevation and to match the elevation of adjacent undisturbed surfaces.

Seedbed preparation within restoration seeding areas, with or without floodplain roughness, shall ensure that the soil surface is firm but not overly compacted, and free of equipment tracks prior to application of seed. Within restoration areas, seeding shall occur after floodplain roughness is complete and approved by the Engineer, and after plant materials, browse protectors, and fence posts are installed. All ruts and compaction resulting from plant installation activities shall be removed prior to seed application. This sequence is necessary ensure proper seed bed preparation and to limit equipment or foot traffic over seeded areas.

3.2 BROADCAST SEEDING

Sow seed at rate as indicated on the Drawings. The Contractor shall plant seed using broadcast methods, whereby seed is scattered on the surface of the ground instead of planted in the ground. Broadcast seeding methods shall use a hand operated broadcast seed spreader or other similar tools as approved by the Engineer.

3.3 DRILL SEEDING

Drill seeding is an application method where the seed is placed in the ground, resulting in better protection and seed to soil contact. Drill seeding is the preferred method for seeding

WF Bitterroot River – Rombo Campground Shoreline Stabilization Project 28 construction disturbance areas such as materials staging areas and temporary access roads, following project implementation. Specific locations and total area to be drill seeded will be determined following project implementation.

The seed drill shall be capable of accurately seeding native grass and forb species. This requires a seed drill with multiple seed boxes for different seed sizes or an in‐box seed agitator.

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SECTION 02929

VEGETATIVE CUTTINGS

1.1 DESCRIPTION:

This section specifies the acquisition, transport, and staging of vegetative cuttings from collection sites to the project area.

1.2 RELATED WORK:

A. Section 01300 Submittals B. Section 01560 Environmental Controls C. Section 01600 Protection of Materials D. Section 02990 Willow Trench E. Section 05000 Engineered Large Wood F. Section 05001 Vegetated Wood Matrix

1.3 QUALITY ASSURANCE:

A. The Engineer shall be notified at least 48 hours in advance of vegetative cutting harvest.

1.4 SUBMITTALS:

A. Submit in accordance with Section 01300, Submittals.

B. Written information providing the location(s) of proposed collection site(s), descriptions of species present and their health.

C. Written description identifying staging area for cuttings.

D. Alternative collection sites and on‐site staging area submittals shall be approved by the

Engineer.

1.5 APPLICABLE PUBLICATIONS:

USDA‐NRCS Plant Materials Technical Note #29: Collecting Willow,…