AttachmentJ2_SpecialProvisions_2019-06-05.docx

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Prepared for: Latah Soil and Water Conservation District 220 East 5th Street, Suite 208 Moscow ID 83843

And

Palouse Ranger District – Nez Perce-Clearwater National Forest 1700 Highway 6 Potlatch, ID 83855

June 5, 2019

Two-Mile Meadow Restoration Project Phase 2 Special Provisions

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Contents

Tables

Appendices Appendix A Ground Protection Mats A1 Acronyms and Abbreviations

Units

Two-Mile Meadow Restoration Project Phase 2 Special Provisions

Project Overview This project, referred to as the Two-Mile Meadow Restoration Project, is located in Latah County, Idaho in Sections 13 and 24 of Township 40 North, Range 01 West. The project area is located along the East Fork Potlatch River approximately 3 miles due east of Helmer, Idaho and includes only the Upper Two-Mile Meadow Site. Two-Mile Meadow is located directly east of Forest Road 3227, off Forks Road (Forest Road 3332). Refer to the Drawings (Sheet C1) for an illustration of the location and the overall project vicinity. This contract is for the second phase of this project. Phase 1 was completed in 2018. Phase 2 includes work in both the Upper Meadow and includes upgrades in the Phase 1 area.

As a result of past logging and railroad operations and associated extirpation of beavers, the East Fork Potlatch River through Two-Mile Meadow has been diverted out of its historic channel, negatively impacting the existing floodplain and riparian environment. The purpose of this project is to restore meadow hydrology to a state that supports healthy native meadow and riparian conditions and habitat for fish and wildlife, including restoring the stream to its historic channel and elevations. The project is designed to slow water and enhance groundwater recharge, prevent the introduction of sediment into East Fork Potlatch River from excessive streambank and bed erosion, and promote natural native vegetation and riparian and wetland areas.

This project takes place in a fragile and sensitive meadow ecosystem. Contractor shall take every precaution possible to protect this ecosystem environment.

In general, the project consists of the following components: development of temporary access routes; removal of railroad berms; earthwork operations for construction of a channel diversion structure, two ditch plugs, constructed channel segments, and fill areas; sod harvest, replant, and storage; construction of habitat structures; addition of floodplain logs and slash; installation and repair of fence; debris removal; and coordination with the Forest Service Contracting Officer (Government) or their representative for dewatering and fish salvage, revegetation, and adherence to various site controls.

General Work Description Contractor assumes full and sole responsibility for the capability of selected construction techniques to complete the Work specified herein. Contractor also assumes full and sole responsibility for safety and environmental protection with the selected construction techniques. Submittal review by Government in no way relieves Contractor of these responsibilities.

This project takes place in a sensitive meadow ecosystem. Construction for this project shall occur between July 15 and October 15, 2019. Work shall not commence until approved by the Government and shall be dependent on weather, road, and meadow conditions. In-stream work shall occur only between July 15 and September 15. The project will commence after Notice to Proceed (NTP) is issued by the Government. All equipment must be off Site by October 15, 2019. Contractor shall take every possible precaution to avoid excessive impacts to the meadow and shall plan and schedule Work under this project accordingly.

Prior to mobilization, Contractor shall prepare and submit to Government a project schedule, which shall be updated every two weeks throughout the project and whenever significant schedule changes occur (see Section 3 for additional details).

Construction shall proceed in three phases: Phase 1 was constructed in 2018; Phase 2 will occur in 2019 under this solicitation; and Phase 3 in 2020. Construction of this project is phased to minimize annual impacts to the meadow ecosystem. Because the construction season is relatively short, it is preferable to perform the floodplain Work over two years. Access to the site will remain open for one year after Phase 2 is complete, so the purpose of Phase 3 will be to complete decommissioning of temporary access routes.

This contract is solely for the construction of Phase 2.

Acceptance of the Work will be made when the Work is completed and will be determined by the Government through a Work area inspection. Work acceptance will be based on adherence to the Work specifications stated herein.

Revegetation, aside from clump planting and placement of harvested sod, will be completed by the Government, but will be coordinated with the Work specified under this project.

Contractor shall maintain existing drainage patterns unless otherwise specified in the Drawings or these Special Provisions.

Existing improvements, surfaces, and vegetation that are to be protected or are to remain, which are subsequently disturbed or removed, shall be replaced to conditions as good as or better than those encountered at Contractor’s expense.

Contractor shall contain and store all solid and liquid wastes generated by or used during construction activities in a neat and orderly manner at an approved storage area. Contractor shall dispose all liquid wastes off Site in a legal manner. Liquid wastes may include, but are not limited to: grease, used motor oil, and sanitary waste. Store and handle all wastes in accordance with applicable regulations. All spills shall be reported to Government and cleaned up immediately. Contractor shall remove all solid wastes from the construction area upon completion of the Work and dispose at a licensed landfill.

No littering will be allowed on the meadow or construction area. Contractor shall provide and maintain suitable garbage receptacles at the staging area and other locations within the construction area as appropriate. The garbage receptacles shall be covered and physically secured to prevent loss of contents by weather, wildlife, or vandalism. Contractor shall empty the garbage receptacles as needed and ensure that the garbage is properly disposed of at a licensed landfill facility. Contractor shall inform employees and Subcontractors of garbage receptacle locations, instruct them not to litter, and require that all garbage generated on Site is properly disposed of.

Contractor shall obtain written approval from Government to work outside the designated project limits shown on the Drawings. Contractor shall comply with instructions of Government and the ordinances and codes of Government agencies regarding signs, traffic, fire restrictions, burning, explosives, danger signals, and barricades.

To promote fire safety, the following shall be observed on the project site:

· Building, maintaining, or using fire or campfire shall not be permitted

· Use or possession of fireworks shall not be permitted.

· The use of explosives is prohibited under this Contract.

To ensure safe driving Contractor must have citizens band (CB) radios in all vehicles to be used on USFS Road 3227 and meadow access routes. Government will designate a radio frequency, and radios shall be operational, turned on, and tuned to a designated frequency at all times when driving on USFS Road 3227 and meadow access routes.

Two gates on USFS Road 3227 shall be kept closed at all times.

A Government revegetation crew (Crew) will be working on site during the construction period. Contractor shall coordinate with Government to ensure the Work is not inhibited by Crew activities. Contractor shall coordinate with Government to facilitate efficiencies for both Contractor and Crew, as both activities are critical to the successful outcome of this project.

Contractor shall provide all labor, tools, equipment, materials, and incidentals necessary to complete the Work as specified herein.

Permits:

Government shall be responsible for stream construction-related permits and will provide copies of relevant information prior to the start of construction. Contractor shall develop a Stormwater Pollution Prevention Plan (SWPPP) and obtain required Construction General Permit for the Work, which will take two weeks, prior to starting construction. All costs necessary to obtain and comply with applicable permits are considered incidental to the Work. Copies of permits shall be submitted to Government prior to initiating construction activities.

Facilities:

Contractor shall provide all necessary mobile office and sanitation facilities for Contractor’s operations. Contractor shall locate facilities at the Site and as approved by Government.

Project Schedule and Notifications Contractor shall develop and submit to Government a project schedule prior to mobilization. All significant (more than 5 days) changes to the schedule must be communicated to Government. Scheduling will be of particular importance for water and fish management activities and for structures requiring Live Cuttings. Cuttings need to be harvested and soaked before they can be installed, so advance notice is paramount.

Contractor shall provide an updated schedule to Government every two weeks or when a significant (more than 5 days) change is anticipated. Contractor must notify Government prior to starting construction on certain project features. Table 1 shows required notification timelines.

Government Notifications

Health and Safety Plan Contractor and all on-Site personnel, including all Subcontractors and their employees, under Contractor’s supervision shall comply with all U.S. Department of Labor Occupational Safety and Health Administration (OSHA) regulations.

Contractor shall prepare and submit to Government a Site-specific Health and Safety Plan in accordance with the Submittals section (Section 11.0). Contractor shall prepare the Health and Safety Plan in accordance with the following OSHA standard practices: Safety and Health Standards 29 CFR 1926 (General Industry and Construction Industry). At a minimum, the Health and Safety Plan shall address the following elements: staff organization, responsibilities, and authorities; Site description and identification of hazards; hazard analysis for each Project task and operation; required general and Site-specific training; personal protective equipment (PPE); medical surveillance; personal and environmental exposure monitoring; standard operating safety procedures, engineering controls, and work practices (including a prohibition of single person work crews); communications; illumination; Site control measures; personnel hygiene; emergency equipment and first aid; emergency response and contingency procedures; and logs, reports, and record keeping. The Health and Safety Plan shall include a discussion of training, safety procedures, training certificates, and other requirements necessary to educate all workers and Subcontractors used on the Project.

Contractor shall address all specific safety and operational issues in the Site-specific Health and Safety Plan. At a minimum, Contractor shall comply with the following general safety requirements at all times:

Contractor’s employees and Subcontractor’s employees shall not operate cell phones or other hand-held devices while driving or operating machinery.

Contractor’s employees and Subcontractor’s employees shall obey speed limits when driving on public roads.

Contractor shall work only during daylight hours unless a lighting plan is included in the Health and Safety Plan.

Contractor’s employees and Subcontractor’s employees shall wear safety belts at all times when driving a vehicle or operating equipment.

First aid kits and fire extinguishers are required in all field vehicles and equipment.

No illegal drugs, alcohol, or firearms are allowed on Site or in employees’ vehicles.

Construction Staking Government will provide initial construction staking of project features. Contractor shall be responsible for elevation control throughout the Project. Contractor shall preserve all primary and other control coordinate stakes. Government costs for resetting control stakes carelessly or willfully destroyed or disturbed by Contractor will be charged to Contractor, and such costs will be deducted from the payment for the Work. Control points located within areas that must be disturbed can be removed without replacement at Government’s discretion.

Quality Control/Quality Assurance Quality control to assure that construction complies with the requirements of the Project Drawings and Special Provisions is the responsibility of Contractor. Quality assurance is the responsibility of Government. Government will perform quality assurance in the form of construction oversight and additional testing, as necessary, to ensure that the Work performed by Contractor meets all applicable requirements.

Specific Contractor quality control testing, sampling and analysis requirements, if applicable, are described for each Bid Item in the Work Description paragraph of these Special Provisions. Contractor shall be responsible for overall construction quality management. All submittals shall be reviewed and approved by Government in accordance with the Submittals section (Section 11.0) of these Special Provisions.

Construction grade tolerances shall be as specified below, unless noted otherwise in the Plans. Final grade for the floodplain surfaces shall be plus or minus 0.5 feet to allow for topographic variability and preservation of high-value vegetation as stated herein. Healthy native vegetation within 1 foot of final grade may be preserved. Final elevations shall be plus or minus 0.5 feet for in-stream and streambank structures. Structure locations noted on the plans are approximate and can be field-fitted to accommodate existing mature vegetation and site conditions as approved by Government. It is Contractor’s responsibility to construct to the established tolerances. Work resulting in grades and alignments not within the specified tolerances will be rejected. Contractor shall remove the rejected or defective Work and complete the Work to the specified requirements or tolerances at Contractor’s expense.

Undiscovered and Undocumented Historic Properties Contractor shall adhere to the following procedures for all undiscovered and undocumented historic properties encountered during construction.

During construction activities, previously undiscovered and undocumented historic properties may be encountered. In such an event, Contractor shall notify Government and stop construction activities in the immediate area of the find to the extent that stoppage will not create an undue risk of harm to human health or the environment. Any changes to the Work (other than construction sequencing) will be made in writing by Change Order.

General Measurement and Payment The total price for each Bid Item shall cover all Work shown on the Drawings and described herein. All costs in connection with the Work include: furnishing materials, equipment, supplies, and appurtenances; providing construction equipment, tools, and incidentals; and performing necessary labor and supervision to fully complete the Work, all of which shall be included in the unit and lump sum bid prices listed on the Bid Form. No item that is required by the Contract Documents for the proper and successful Work completion will be paid for outside or in addition to the prices submitted in the Bid.

Estimated Quantities:

All estimated quantities provided on the Bid Form and Project Materials List (Table 2) are approximate and are to be used only as a basis for estimating the probable cost of Work and for the purpose of comparing the Bids submitted for the Work. The actual quantity of Work performed may differ from the estimated quantities. The measurement method for determining final payment for each Bid Item will be by the Actual, Design, or Lump Sum Quantities, as described below and as shown on the Bid Form. Contractor will make no claim for damages, cost of materials, anticipated profits, or otherwise on account of any difference between the amount of Work actually performed and the estimated amount herein, unless disputing a Design Quantity Bid Item.

Design Quantities denote the final number of units to be paid for under the terms of the Contract. They are based upon the original design data available prior to the project’s advertisement. Original design data include the preliminary survey information, design assumptions, calculations, drawings, and the presentation in the Contract.

Actual Quantities are determined from measurements of completed work. Measurement will be made by the Government and/or authorized representative.

Lump Sum Quantities denote one complete unit of work as required by or described in the Contract, including necessary materials, equipment, and labor to complete the job. Lump Sum Bid Items based upon estimated quantities are not subject to adjustment for actual quantities. The lump sum price reflects a reasonable compromise of the Government and Contractor’s risk that the actual material quantity may be higher or lower than the estimate.

All estimated quantities designated as cubic yard (CY) shall be considered “bank” CY unless otherwise noted. An excavated “bank” CY is the quantity of material removed as measured in its original position. A placed “bank” CY is the quantity of material as measured in its final resting position.

Incidentals The Work Description, Measurement, and Payment section below does not necessarily name all the incidental items and tasks required by the Contract Documents to complete the Work. Incidentals are Work activities, labor, materials and/or tools, and equipment necessary to complete the Work for which there is no additional charge to the Government. The cost of all such incidentals shall be included in the various related Bid Item(s).

Several known incidentals to the Work are described as follows.

Harvest Alluvium:

Harvest of native alluvium from the East Fork Potlatch River and floodplain involves excavation of river rock material from banks, exposed point bars, river bed of the existing channel, and from depths below approximately 2-4 feet in the floodplain. Exact locations for alluvium harvest will be determined in the field by the Contractor and approved by Government. Alluvial material may be harvested in areas approved by Government prior to dewatering, however harvesting in flowing water can produce significant turbidity, and Contractor must adhere to turbidity standards as delineated in Bid Item 1. Close coordination with Government will be required to ensure fish are isolated from any work in flowing water. Material may be sourced from wetted locations after dewatering and fish removal operations are complete in accordance with Bid Item 3 – Water Management. Bed material should be harvested in as few areas as possible. Alluvium shall meet as closely as possible the sizes indicated in the Bid Items and shall be approved by the Government. Contractor shall segregate material as needed to achieve the general material sizes needed for the project features, as indicated under each Bid Item’s materials section. Staging areas for alluvium must be approved by Government.

Two small piles of alluvium were stockpiled on-site during Phase 1 construction and shall be used in Phase 2. The total volume of these piles is estimated to be 10 – 20 cubic yards.

Alluvium material will be used for rock armoring for channel diversion structure (Bid Item 10 – Channel Diversion Structure) and ditch plugs (Optional Bid Item 22 – Ditch Plugs), constructed channel substrate (Bid Item 11 – Constructed Channel), boulders for habitat structures (Bid Item 14 – Habitat Structures), and rock for in-stream rock and wood structures (Bid Item 15 – In-stream Rock and Wood Structures) and will be paid for under each of these respective Bid Items. Alluvium may also be mixed with native material excavated on Site for use as structural (compactable) fill for channel diversion structure (Bid Item 10 – Channel Diversion Structure) and ditch plugs (Optional Bid Item 21 – Ditch Plugs).

Slash:

Slash, when laid on the ground surface, creates roughness, provides shelter and organic matter for reestablishing plants, and deters future use of decommissioned travelways. Slash shall be used on all disturbed areas including excavation/embankment areas on floodplain; decommissioned meadow travelways; staging areas; around and on the ditch plugs, fill areas, and the channel diversion structure; and at the top of temporary access routes to upper and lower meadows (see Drawings, Sheet C7). As requested by Government, Contractor shall leave slash in piles rather than distributing it prior to demobilization for later use by Government.

Suitable slash is defined as any woody material smaller than 6 inches in diameter. Slash also contains live or dead vegetation and other miscellaneous vegetative material (e.g., wood, stumps, brush, roots, branches, and bushes). Slash does not include stripped topsoil or herbaceous vegetative material (e.g. grasses, weeds, and non-woody plants). Removal of dead standing trees is expressly prohibited. Slash shall be obtained through Bid Item 5 – Tree and Slash Removal and Stockpiling and through other specified Work. Contractor shall place slash at the spacing and densities described herein and as shown on the Drawings (Sheet D9). Contractor shall place slash at a 50 percent to 70 percent coverage rate over slash areas.

Contractor shall place slash on areas shown on the Drawings (Sheet C7), the meadow area temporary access routes (Bid Item 4), on and around channel diversion structure (Bid Item 10) and ditch plugs (Optional Bid Item 21), and on all disturbed areas. Slash will be paid for under each of these respective Bid Items and/or other Bid Items which require slash to cover disturbed areas.

Work Description, Measurement, and Payment The Work, measurement methods, and payment methods for each Bid Item are discussed below. The Drawings, in their entirety, are applicable to the Work. Contractor shall perform the Work described in this section. A list of materials to be generated and used on this project is shown in Table 2.

Materials staging within the Site must not impact the riparian environment or interfere with other Work.

Staging areas must be approved by the Government.

All materials shall be approved by the Government prior to their use.

Project Materials List (2 pages) Note: Quantities in this table are estimates and not necessarily used in pay items.

3, 10

3, 14

800 LF (100 mat placements)

30,000 SF

6,000 SF

10' X 12' 6,000 SF (50 tarps)

30" Width

6,000 SF

See Drawings Sheets C6

30 EA

2,100 LF

As Needed

100,000 GAL

Bid Item 1 – Mobilization and Demobilization Description:

Contractor shall perform the preparatory Work and operations necessary for the movement of personnel, equipment, supplies, and incidentals to and from the project Site. This Bid Item includes preparing, moving, and setting up all structures and equipment for on-Site facilities; establishing and decommissioning the staging area(s) and Contractor’s facilities; performing Site control measures; providing construction vehicles and equipment that are free of weeds and weed seeds; controlling fuel, oil, and other fluids on the Site in accordance with Contractor’s Site-specific Spill Prevention, Control, and Countermeasures (SPCC) Plan; removing all garbage, debris, equipment, leftover materials, and incidentals from the Site; cleaning up the Site; and all other Work and operations that must be performed before beginning Work on the various other Bid Items. Contractor’s cost for administration, bonding, insurance, permitting, and site documents is included in this Bid Item and no separate payment will be made.

Staging Area(s):

Equipment and materials staging areas shall be established by Contractor in locations approved by the Government. Staging areas and any additional space needed or modifications to the staging area(s) boundaries shall be subject to approval by the Government.

Contractor shall limit equipment and materials storage to the staging area(s), unless specifically approved otherwise by the Government. Materials staging within the Site must not impact the riparian environment or interfere with other Work.

Contractor will be responsible for hazardous material containment and cleanup, providing weed-free equipment and controlling spread of weeds at the Site, erosion control measures, and security of the staging area(s).

Any construction debris and/or domestic waste shall be disposed off site at an approved landfill by the Contractor. Trash that may attract insects or other animals shall not be left on Site.

A portable toilet shall be located at or near staging area for the project’s duration. Portable toilet shall be positioned on a level surface to prevent tipping and shall be serviced on a regular basis throughout the duration of the contract.

Immediately following construction completion, the staging area(s) shall be thoroughly cleaned of all trash, debris, and construction materials, decompacted as requested by Government, re-graded to match adjacent topography, and covered with slash.

Weed Control:

During construction operations, the Contractor shall control the spread of noxious weeds within, onto, and from the Site in accordance with the following stipulations. Specifically, the Contractor shall:

Decontaminate all construction equipment including vehicles, heavy equipment, and pumps to prevent the spread of noxious weeds by cleaning with high-pressure water before moving equipment into the Site. Only clean construction equipment inspected by the Government will be allowed to operate within the work area.

Decontaminate each piece of equipment used coming from established haul and access routes each time it enters the Site if it has been used at sites other than the construction area since it was last decontaminated.

Clean all wheels, tracks, undercarriages, fenders, blades, buckets, and the exterior body of vehicles/equipment to remove any weed seeds, fuel, and oil prior to entering the Site.

Provide a parking area for Contractor, employees, suppliers, Government and other persons in an area free from weed infestations.

Site Control:

The Contractor shall be responsible for providing adequate safeguards, safety devices, protective equipment, flaggers, and any other needed site control actions to protect the life, health, and safety of the public, and to protect property in connection with the performance of Work covered by the Contract Documents.

The Contractor is responsible for preservation and protection of existing vegetation. Contractor shall make every effort to minimize disturbance and impacts to existing vegetation during the Work. Existing vegetation that is to be protected or is to remain, which is subsequently disturbed or removed, shall be replaced to a condition as good as or better than that encountered at Contractor’s expense.

The Contractor shall be responsible for the protection of all existing monuments and any other survey markers during construction. Survey control points are shown on the Drawings (Sheet C2). All such monuments or markers destroyed during construction shall be replaced at Contractor’s expense.

Contractor shall inspect construction equipment daily for leaks, seeps, and general condition. Any leaks of fuel, oil, lubricants, hydraulic fluid, or other fluids will be repaired before equipment is used for further work. Every vehicle used on the construction Site will have absorbent materials capable of absorbing a minimum of 10 gallons of fuel, oil, or hydraulic fluid on board.

Refueling of equipment shall take place only in Government-approved refueling areas.

All equipment that is used in flowing water shall be equipped with biodegradable hydraulic oil.

Site security and public safety shall be the responsibility of Contractor. Contractor shall limit public access to the Site during construction. At a minimum, this includes ensuring the locked gates on Forest Road 3227 are maintained and kept closed and locked at all times.

Debris Removal:

Contractor shall remove and load debris found within the construction extents. Expected debris may include wire, cable, railroad ties and track, and similar metal items.

Contractor shall be responsible for any disposal fees associated with the debris disposal.

Road Protection and Maintenance:

Primitive Forest Road 3227 leads to the construction access routes as shown on the Drawings (Sheet C2). Maintenance typical to this primitive road such as downed tree removal, road grading, and/or road surfacing may be required to gain access to the construction access routes. Such maintenance shall be incidental to this Bid Item and shall be accounted for by the Contractor as appropriate in their Bid. Floodplain construction access routes will be paid for separately under Bid Item 4 – Construction Access.

Turbidity:

All state and local water quality regulations will be met. The Contractor will limit turbidity by strategic location of equipment; for example, by working from stream banks with stable banks, rather than in-stream. Contractor shall avoid working on undercut banks to the extent possible. Damage to riparian areas shall be avoided. State of Idaho (IDAPA 58.01.02 page 148(e)) Department of Environmental Quality turbidity criterion for water quality standards are as follows: Turbidity, below any applicable mixing zone shall not exceed background turbidity by more than fifty (50) NTU instantaneously or more than twenty-five (25) NTU for more than ten (10) consecutive days and/or for up to 3 continuous hours. If 50 NTUs above background levels are detected, Contractor shall cease in-stream work. Activities will be allowed to proceed once the turbidity returns to background levels or 10 NTUs. Turbidity monitoring, including personnel and equipment, will be provided by the Government.

Stormwater Controls:

Contractor shall submit to Government a completed SWPPP. Contractor shall be responsible for securing a Construction General Permit for this work.

SWPPP shall include Contractor’s plan for controlling erosion and sedimentation during construction. Contractor shall maintain on site at all times adequate numbers of certified weed-free biodegradable straw wattles or certified weed-free straw bales to provide sediment control for all exposed surfaces in the event of rainfall in accordance with the SWPPP. Contractor shall be responsible for adhering to all conditions in the SWPPP including installation, maintenance, and removal (if not permanent) of Best Management Practices (BMPs) for stormwater control if precipitation is predicted or expected during the project Work window.

Contractor shall document, provide, install, and maintain all necessary BMPs that will be used during construction activities for erosion control and stormwater management purposes. All BMPs installed by Contractor shall meet the applicable requirements of the Drawings, Special Provisions, and permits. Depending on actual Site conditions encountered during construction, additional BMPs may be necessary to adequately complete the Work. Contractor shall install any additional BMPs at Government’s discretion and in accordance with the guidance documents listed below:

Idaho Department of Environmental Quality, Catalog of Stormwater Best Management Practices for Idaho Cities and Counties, September 2005.

U.S. Environmental Protection Agency (USEPA), Storm Water Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practices, October 1992.

Contractor is responsible for control and cleanup of all materials including, but not limited to: gasoline, diesel fuel, motor oil, hydraulic and transmission fluid, antifreeze, brake fluid, and all other materials and chemicals used in the operation and maintenance of equipment and machinery.

Contractor shall obtain and comply with all provisions of the USEPA 2017 Construction General Permit (CGP). Refer to the following website for information on the 2017 CGP, including guidelines on how to apply for and obtain permit coverage:

https://www.epa.gov/npdes/epas-2017-construction-general-permit-cgp-and-related-documents Measurement:

No measurement for Bid Item 1 – Mobilization and Demobilization will be made.

Payment:

Payment for Bid Item 1 – Mobilization and Demobilization will be based on the lump sum price bid as shown on the Bid Form. Fifty percent (50%) payment for this Bid Item will be allowed once Contractor fully mobilizes to the Site and obtains approval on all submittals required before starting construction. Full payment for this item will be allowed once Contractor completes the specified Work and fully demobilizes equipment and materials from the Site. The lump sum bid price for this item must not exceed ten percent (10%) of the total bid price.

Bid Item 2 – Provide Water Description:

This Bid Item covers all Work necessary to obtain and apply water for plant maintenance and dust control at the Site. Water will also be used for moisture conditioning for compaction during filling operations; to keep burlap for harvested sod and wetland sod damp as required; to water all seeded, mulched, and planted areas; and to water surfaces prior to sod installation. Water can be pumped from East Fork Potlatch River with an appropriate pump.

Equipment:

Contractor shall provide and have available at all times during construction at least one truck capable of spreading water uniformly across the surface to be watered and available to all active work areas. Water truck shall be equipped with spray nozzles capable of fire suppression and hoses as needed to fill water shuttles.

Water truck shall have capacity and water supply sufficient to complete the Work specified herein.

Contractor shall provide a pump with a screened inlet for pumping water from the river. Pump water inlet must have a 3/32-inch mesh screen or other Government-approved device to prevent fish entrainment or impingement.

Contractor shall ensure that all water supplies and watering equipment are prepared and readied for use prior to beginning any Work and remain available continuously throughout the project.

Execution:

Work includes, at a minimum:

Contractor shall propose and Government shall approve the water source location(s) at the East Fork Potlatch River prior to start of construction. Contractor may use alternative water source locations upon approval from Government.

No more than 10 gallons per minute at any time may be removed from the East Fork Potlatch River for this Bid Item.

Contractor shall provide dust control during the Work to the Government’s satisfaction. Contractor shall apply water for dust control on dust-generating surfaces as often as necessary to prevent visible dust. Water shall be applied on all gravel and/or dirt haul roads and routes and at locations identified by the Government or specified elsewhere in these Special Provisions.

Contractor shall apply water at the locations and in the amounts needed to properly complete the Work. Over-watering or under-watering, as determined by Government, shall not be permitted.

Contractor shall apply water to subgrades, embankments, and backfill in the correct quantity and in a manner that ensures subgrade, embankment, and backfill are compacted in accordance with these Special Provisions.

Contractor shall apply water to burlap covering harvested sod in storage (see Bid Item 8) Contractor shall apply water to burlap covering Government-installed wetland sod and keep burlap damp for the duration of the project.

Contractor shall apply water to topsoil of Channel Diversion Structure (Bid Item 10), Ditch Plug (Optional Bid Item 21), Fill Areas (Bid Item 12), and other locations as requested by Government prior to sod placement.

Contractor shall fill water shuttles staged on site by Government as needed. During intensive watering period, expected for duration of approximately 3 weeks, Contractor shall provide up to 3,000 gallons per day, up to 4 days per week. During non-intensive watering period, expected duration of approximately 7 weeks, Contractor shall provide up to 3,000 gallons per week.

Measurement:

No measurement will be made for Bid Item 2 – Provide Water Payment:

Payment for Bid Item 2 – Provide Water will be made at the lump sum price as shown on the Bid Form. This lump sum price shall constitute full compensation for all labor, equipment, tools, supplies, materials, and incidentals necessary to accomplish the Work.

Bid Item 3 – Water Management Description:

This Bid Item describes the Work required to provide and install channel dewatering systems, provide water control, and provide work area isolation and dewatering for construction. Water management is needed to dewater portions of the existing East Fork Potlatch River channel to build a channel diversion structure (Bid Item 10), install ditch plug (Optional Bid Item 21), build in-stream rock and wood structures (Bid Item 15), and build habitat structures (Bid Item 14). Water management may also be needed to dewater wet areas in the meadow for construction. Coordination of this Work with the Government will be necessary as the Government conducts fish salvage operations in the dewatered river section and in isolated pools on the floodplain. Water management and fish salvage in the existing active channel shall commence on a Monday, and shall delay in-stream work by no more than five (5) calendar days. Government will install fish isolation features as appropriate upstream and downstream of dewatering area before dewatering begins. Only one river segment shall be dewatered at any one time.

Contractor shall notify Government a minimum of 10 calendar days (on Friday) before flow diversion begins to allow Government to assemble and mobilize fish isolation team.

Live river access may be required to harvest alluvium and install water management. If required, access or crossing shall be made only in a time and location approved by Government. Contractor shall cross perpendicular to flow, and limit crossings to the fewest number possible. Live river crossing shall not be permitted unless the crossing reach has been defished by Government.

The installation of habitat features, bank repair, and other Work may be completed in the wet if turbidity levels remain below 50 NTUs and work areas are isolated from flow and defished. The Contractor shall isolate the work area by installing coffer dams around the area and pumping the water to keep turbidity levels below 50 NTUs. As turbidity levels approach 50 NTUs the Contractor must stop instream work activities until levels return to near baseline.

Prior to any work being done in the wet, Contractor shall provide 48 hours notice and fish will be removed (by the government) from the isolated area. Notification provisions apply. Fish salvage operations may cause a delay of up to 2 hours per structure.

Contractor shall submit to Government its Water Management Plan in accordance with the Submittals section (Section 11.0) of these Special Provisions. Water management shall be executed in accordance with the Water Management Plan, the Drawings (Sheet C9), and as described below.

Materials:

Contractor shall provide all labor, equipment, tools, materials, and incidentals necessary to complete the Work as specified.

Contractor shall provide water control (sandbags, ecology blocks, bulk bags, etc.) and pumps in accordance with Contractor’s Water Management Plan and as needed for water flow reduction and adjustment during fish salvage operations in the existing river channel and for work area isolation as needed to construct in-stream features.

Contractor shall provide pump(s) capable of completing the Work described herein. Pump water inlet must have a 3/32-inch mesh screen or other Government-approved device to prevent fish entrainment or impingement. Pumps shall be onsite before any instream work begins and shall remain onsite until the instream work is complete.

If a bulk bag coffer dam is used for isolation or diversion, the contractor must meet the following conditions. Bulk bags should only be used in moderate water depths (typically between 1.5 and 5 feet). Mechanical placement of bags can be done in standing or flowing water with minimal turbidity generation. Bags should be filled with a well graded mixture of sand and washed rock.

Bulk Bag Fill Gradation

If above mixture cannot be obtained, a more readily available mixture of sand and washed rounded gravel may be substituted. Sand should meet ASCTM 33 standards. Washed gravel should be rounded three-quarter minus or larger, but not exceed two-inch minus. The percentage of sand to gravel should be split 60% to 40%. If material is brought onto the Site for use in bulk bags, it must be either used in construction or transported off site when no longer needed.

Smaller sand bags, if used, should be filled with sand or pea gravel, not soil.

Where the bottom grade is uneven or covered with large material, limited mechanical smoothing of the area where bags will be placed may be allowed if turbidity remains below permissible levels.

Once the bulk bags are in place for isolation and diversion, and if additional reduction in seepage is required, plastic sheeting may be placed around the bags.

Where two or more layers of bulk bags are used, plastic sheeting may be pinned between the layers as the bags are placed. Alternatively, tall (2-CY) bulk bags may be used if needed.

Execution:

Work includes, at a minimum:

Contractor shall refer to the Drawings (Sheet C9) for approximate locations of channel dewatering structures.

Contractor shall implement a water control device(s) and reduce or increase flow in the existing channel as approved by Government.

Contractor shall provide water reduction by approximately 1/3 to 2/3 of the initial flow on the first day of dewatering. In coordination with the Government, water level shall be reduced to nearly dry (isolated pools) on the second or third day. Contractor shall have the capability to adjust the water to provide more or less water into the dewatered reach as requested by Government. Upon completion of fish salvage operations, and upon approval by Government, Contractor can begin work in the dewatered reach or the area isolated from flow.

Contractor shall coordinate and work closely with Government to provide dewatering and rewatering as requested as they conduct fish salvage in the dewatered reach and to control water and sediment flowing in the constructed channel.

Contractor shall receive from Government approval of constructed project features in the design channel alignment prior to diverting water into the design channel alignment.

Water shall be diverted into the constructed design channel alignment.

1. Introduction of water into newly constructed channel shall be conducted according to the following procedure:

1. Contractor shall pre-wash the newly excavated channel before re-watering. Turbid wash water will be detained and pumped to the floodplain rather than discharged to fish-bearing waters.

1. Starting in the early morning in coordination with Government, introduce 1/3 of the flow into the new channel over a period of 1-2 hours. If turbidity is approaching 50 NTU, modify the activity to reduce turbidity. This might mean decreasing the amount of flow entering the new channel and/or correcting any other issues that are causing turbidity (for example – correct a bank that is sloughing, install or correct a BMP, etc.)

1. Government will conduct turbidity monitoring.

1. Once turbidity meets the standard, and in consultation with Government, Contractor may introduce the second 1/3 of the flow over the next 1-2 hours.

1. Government will salvage fish from the old channel at this time, so that the old channel is fish-free before dropping below 1/3 of the flow.

1. After the second 1/3 of flow is introduced over 2 hours, de-fishing is completed, and turbidity criteria are met, Contractor may divert the final 1/3 of flow. Once 100% of the flow is in the new channel, Government will pull nets from old channel.

1. Contractor can now proceed with required Work in the old (Existing) channel.

Contractor shall use a pump or other Government-approved water reduction measure to draw down water from isolation areas at a rate and to a level that is accepted by the Government.

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 so as to prevent removal of the natural soils.

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

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.

Contractor shall provide isolation dewatering of the existing East Fork Potlatch River channel if work is to be conducted in flowing water and as needed to construct habitat structures (Bid Item 14).

Contractor shall coordinate isolation dewatering in the East Fork Potlatch River existing channel with the Government as they conduct fish salvage.

Contractor shall use a pump or other Government-approved water reduction measure to draw down water from the isolation areas at a rate and to a level that is accepted by the Government.

Contractor shall coordinate this Work with other Bid Items as needed.

Measurement:

No measurement for Bid Item 3 – Water Management will be made.

Payment:

Payment for Bid Item 3 – Water Management will be made at the lump sum price as…