Attachment_J2_Newsome_Reach_2_Special_Provisions.docx

FINAL

Newsome Creek Reach 2 Stream Habitat Improvement Design Special Provisions

Prepared for:

Nez Perce-Clearwater National Forest 104 Airport Road Grangeville, ID 83530 and Nez Perce Tribe Fisheries P.O. Box 305 Lapwai, ID 83540

Prepared by:

TerraGraphics Environmental Engineering, Inc.

121 S. Jackson St.

Moscow, ID 83843 www.terragraphics.com

November 2016 Edited by FS 2/6/2017 and 3/13/2017

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Contents

Appendices Appendix A Stormwater Pollution Prevention Plan (SWPPP) Template A

Tables

Acronyms and Abbreviations

Units

Newsome Creek Reach 2 Special Provisions

Project Overview This project, referred to as the Newsome Creek Reach 2 Stream Habitat Improvement Project, is located on Newsome Creek in Idaho County, Idaho upstream of the Newsome Town Site, approximately 10 miles northwest of Elk City, Idaho. Refer to the Drawings in Appendix B (Sheet CS) for an illustration of the overall project vicinity. Access to the site is from Idaho State Highway 14 to Newsome Creek Road 1858 which passes through Newsome Townsite. Beyond Newsome Townsite, past MP 7 of Road 1858, a 0.9-mile long primitive access route to the right provides access to the project.

Newsome Creek Reach 2 has been diverted out of its historic channel as a result of past mining operations, negatively impacting the existing floodplain and riparian environment. The purpose of this project is to improve channel morphology and stream function utilizing as much of the restored valley bottom and floodplain as feasible and to increase fish habitat primarily through the use of stream habitat features (pools, riffles, glides, etc.) and large woody debris.

In general, the project consists of the following components: development and decommissioning of an access route; earthwork operations for construction of channel diversion structures, constructed channel segments, off-channel habitat, and floodplain swales; sod harvest, replant, and storage; construction of habitat structures; addition of floodplain roughness, logs, and slash; 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.

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, harvested sod, and plants integral to Brush Fascine (BF) treatments (see Bid Item 12), will be completed under a separate contract in a subsequent year.

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

Permits:

Government shall be responsible for all stream construction-related permits and will provide copies of all relevant information prior to the start of construction.

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.

Endangered Fish Species:

If a listed fish is found in imminent peril of death or harm, such as finding a live fish out of water in a drying pool, the Contractor shall take immediate steps to rescue the fish by transferring it to flowing water or other safe location, even if those efforts may accidentally kill the fish. If possible, or without further jeopardizing the fish, the Contractor should photograph the affected fish before moving it, and note the number, size, and location of fish rescued or killed. The finder must notify the CO as soon as possible.

If the Contractor encounters a steelhead that is sick, injured, or killed as a result of project-related activities, and if the fish would not benefit from rescue, the Contractor should leave the fish alone, make note of any circumstances likely causing the death or injury, location and number of fish involved, and take photographs, if possible. If the fish in question appears capable of recovering if rescued, photograph the fish (if possible), transport the fish to a suitable location, and record the information described above. Adult fish should generally not be disturbed unless circumstances arise where an adult fish has obviously been mortally injured or killed by project activities or some unnatural cause. The Contractor must contact the CO as soon as possible. The Contractor may be asked to carry out instructions provided by Law enforcement to collect specimens or take other measures to ensure that evidence intrinsic to the specimen is preserved.

Fish passage through the project area will be maintained at all times.

If Forest Service redd surveys locate steelhead, Chinook, or bull trout redds, at crossings on the designated access route, the Contractor will, under the direction of the CO, construct a temporary or alternate access at the site. If the above situation arises, a request for an equitable adjustment to contract price and the delivery deadline may be submitted to the CO for consideration.

Quality Control and 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 7.0 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 roughness and preservation of high-value vegetation as stated herein. Final elevations shall be plus or minus 0.2 feet for all stream channel construction, and in-stream or 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.

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 all materials, equipment, supplies, and appurtenances; providing all construction equipment, tools, and incidentals; and performing all 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 (Table 1) 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 (see below).

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. Changes in the number of units DESIGNATED ON THE BID FORM may be authorized under any of the following conditions:

1. Changes in the Work authorized by the Government.

1. A determination by the Government that errors exist in the original design that cause a Bid Item quantity to change by 15 percent or more.

1. A written request by the Contractor submitted to the Government showing evidence of errors in the original design that cause the Bid Item quantity to change by 15 percent or more. The evidence must be verifiable and consist of calculations, drawings, or other data that show how the designed quantity is in error.

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.

Bid Form (2 pages)

Construction Access Items 4-5

Large Wood Structures Items 13-15

Equipment Rental Items 19-20

Total Bid Price in Words:

BID Total ($)

AC = Acre EA = Each LF = Linear Feet LS = Lump Sum SF = Square Feet HR = Hour BCY = Bank Cubic Yard

Incidentals Unless otherwise provided, Contractor shall furnish all labor, materials, equipment, tools, transportation, and supplies and perform all work required to complete the project in accordance with drawings, specifications, and provision of the contract. Payment for contract work will be made only for and under those pay items included in the Schedule of Items. All other work and materials will be considered incidental to and included in the payment for the items shown.

Three known incidentals to the Work are described as follows.

Provide Water:

Contractor shall obtain and apply water for dust control at the Site, moisture conditioning for compaction during filling operations, to water brush fascines, to keep harvested sod and wetland sod damp as required, and to water surfaces prior to sod installation. Water can be pumped from Newsome Creek with an appropriate pump.

If a pump is used, 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.

Floodplain Roughness:

All disturbed or constructed floodplain surfaces shall be left in a roughened condition upon completion of the Work. This treatment creates areas to trap seed, water, and organic matter for new plant growth.

Floodplain roughness shall be incidental to the Work described herein and no additional payment shall be made.

Slash and Logs:

Slash and logs, when laid on the ground surface, create roughness, provide shelter and organic matter for reestablishing plants, and help deter future use of access routes. Slash and logs shall be used on disturbed areas, channel fill areas, decompacted access routes, and around and on channel diversion structures.

Large logs found on the Site will be used to build Brush Fascines (Bid Item 12) and Large Wood Structures (Bid Items 13-15) and will be placed throughout the floodplain in accordance with Bid Item 16. In addition to these specific Work items, slash and logs will be used to provide roughness in areas that are disturbed or that require additional protection from erosion. Suitable slash and logs for this purpose are defined as any woody material including dead woody vegetation and miscellaneous vegetative material such as logs, stumps, brush, roots, branches, and dead bushes. Slash and logs currently cover the existing floodplain surface at the Site. Slash and logs shall be obtained through specified Work that requires moving these materials out of the Work area including but not limited to: Floodplain Temporary Access Routes (Bid Item 5), Constructed Channel (Bid Item 9), and Off-Channel Habitat (Bid Item 11). Contractor shall place slash and logs at the spacing and densities described herein.

Contractor shall place slash and logs on those areas disturbed by heavy equipment, the decompacted Floodplain Temporary Access Routes (Bid Item 5), on and around Channel Diversion Structures (Bid Item 8) and in Fill Areas (Bid Item 10). Slash and logs are incidental to each of these respective Bid Items and any other Bid Items that require slash and logs 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. All materials shall be approved by the Government prior to their use by the Contractor. 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

Specification

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 Stormwater Pollution Prevention Plan (SWPPP) Plan (see below); removing all garbage, 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. 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. Staging areas must be approved by the Government.

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 that do not meet the Site-specific waste disposal criteria shall be disposed of off-Site at an approved landfill by the Contractor.

A portable toilet shall be located on Site for the project’s duration. Portable toilet shall be positioned on a level surface so that it cannot be tipped.

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

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 shall be responsible for the protection of all existing permanent survey monuments during construction. Permanent survey control points are shown on the Drawings (Sheet C1). All such monuments or markers destroyed during construction shall be replaced at Contractor’s expense. Temporary turning points may be destroyed during construction.

Equipment that will be used in live water shall utilize hydraulic fluid that is non-toxic to salmonids. The following criteria should be met to determine if a hydraulic fluid is nontoxic to salmonids during acute exposure: (a) The test species used should be a salmonid (most often this will be rainbow trout, but occasionally Chinook salmon or Coho salmon are tested); (b) The test duration should be 96 hours; (c) The test should be conducted using the water accommodated fraction (WAF) (the WAF is used in testing hydrophobic materials to provide a "worst case scenario" for exposure to aquatic organisms). According to guidance provided by the National Oceanic and Atmospheric Administration, the following products meet the required criteria:

· Chevron Clarity Hydraulic Oil A W

· Ecoterra Hydraulic Oil

· GreensCare Plus

· Mobil EAL 224H

· ENVIRON™ AW HYDRAULIC FLUIDS

The government does not endorse any of these specific products and urges contractors to perform independent research regarding the performance characteristics of each product.

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 gate at the entrance to the project access road is maintained.

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 instream. Excavation equipment will avoid working on undercut banks. Damage to riparian areas will 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 set by the Department, shall not exceed background turbidity by more than (50) NTU instantaneously or more than twenty-five (25) NTU for more than (10) consecutive days and/or for up to 3 continuous hours. When/If (50) NTUs above background levels are detected, the contractor will cease instream work. Activities will be allowed to proceed once the readings return to background levels or (10) NTUs.

Stormwater Controls:

Contractor shall submit to Government a completed Stormwater Pollution Prevention Plan (SWPPP) based on Government-provided template (see SWPPP template in Appendix A). Additional data required includes, at a minimum, names and contact information for project personnel, list of subcontractors, and project schedule and sequence.

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 stipulated in the SWPPP including installation, maintenance, and removal (if not permanent) Best Management Practices (BMPs) for stormwater control in the event that precipitation is predicted or expected during the project Work window. Contractor shall have a supply of basic erosion control materials on site before work begins. Such materials include but are not limited to water pumps and weed free straw bales, 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.

Turbidity monitoring including personnel and equipment will be provided by the Contracting Officer.

If turbidity levels exceed 50 NTUs over background levels 600 feet downstream of the point of discharge, the Contractor must stop work and take measures to reduce turbidity before continuing.

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 maintenance of equipment and machinery.

Contractor shall obtain and comply with all provisions of the USEPA 2012 Construction General Permit (CGP). Refer to the following website for information on the 2012 CGP, including guidelines on how to apply for and obtain permit coverage: http://cfpub.epa.gov/npdes/stormwater/cgp.cfm.

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 – Construction Staking Contractor shall provide all construction staking of project features including, but not limited to: constructed channel alignment (Bid Item 9), swale perimeter (Bid Item 11), side channel alignment (Bid Item 11), brush fascine limits (Bid Item 12), flow deflecting habitat structure locations (Bid Item 13), channel-spanning key structure locations (Bid Item 14), and foot trail location (Bid Item 18). Conduct all construction staking under the direction of a licensed professional engineer or land surveyor who is closely associated and familiar with construction staking. Government will provide electronic files in XML format containing design features and control point locations.

Measurement:

No measurement for Bid Item 2 – Construction Staking will be made.

Payment:

Payment for Bid Item 2 – Construction Staking will be by the lump sum price bid as shown on the Bid Form of the Contract Documents.

Bid Item 3 – Water Management Description:

This Bid Item describes the Work required to provide and install channel dewatering systems and provide water control and dewatering for construction. Water management is needed to dewater portions of the existing Newsome Creek channel to build a Channel Diversion Structure (Bid Item 8) and fill the old creek channel (Bid Item 10) and to ensure turbidity standards are met as described in Bid Item 1– Mobilization.

Only one creek segment shall be dewatered at any one time. Contractor shall notify Government two (2) business days before starting any dewatering operation. Coordination of this Work with the Government will be necessary as the Government conducts fish salvage operations in the dewatered river section. Fish salvage may cause delay of in-stream work by up to three (3) calendar days per creek segment. Work outside the active stream channel can continue during in-stream delay. Government will install fish isolation features as appropriate upstream and downstream of dewatering area before dewatering begins.

Contractor shall submit to Government its Water Management Plan in accordance with the Submittals Section 7.0 of these Special Provisions. Water management shall be executed in accordance with the Water Management Plan 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 a coffer dam, water control device(s), and pumps as needed for water reduction and water adjustment during fish salvage operations.

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.

Execution:

Work includes, at a minimum:

Contractor shall provide water control devices capable of an estimated flow rate of 0 to 40 cubic feet per second (cfs) based on historical flow records. Actual flow rate in the existing creek shall be verified prior to the start of the work and water control devices sized accordingly at no additional cost to the Government.

Contractor shall implement a water control device(s) and reduce or increase flow in the existing channel as requested by Government and in accordance with the procedure outlined below.

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 all constructed project features in the design channel alignment prior to diverting water into that reach of the design channel alignment.

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 or into a reach equipped with sediment capture devices such as a Sedimat®, rather than discharging to fish-bearing waters.

2. Starting in the early morning, 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. In this case, 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.)

3. Contractor shall coordinate with Government on turbidity monitoring.

4. Once turbidity meets the standard, move on to the next watering stage.

5. Prepare to introduce the second 1/3 of the flow (up to a total of 66%) to the new channel by installing seine at upstream end of old channel in order to prevent fish from moving into a partially dewatered channel. Introduce the second 1/3 of the flow over the next 1-2 hours.

6. 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. (Note that fish will be temporarily blocked from moving downstream into either channel until 2/3 of the flow has been transitioned to the new channel. This blockage to downstream fish passage is expected to persist for roughly 12 to 14 hours, but fish will still be able to volitionally move out of the channel in the downstream direction.)

7. After the second 1/3 of flow is introduced over 2 hours, and if turbidity criteria are met, Government will remove seine nets from the new channel and allow fish to move downstream into that channel. Introduce the final 1/3 of flow. Once 100% of the flow is in the new channel, Government will pull nets from old channel.

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

Contractor shall coordinate this Bid Item with Bid Item 8 – Channel Diversion Structure and Bid Item 10 – Fill Areas.

Measurement:

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

Payment:

Payment for Bid Item 3 – Water Management will be by the lump sum price bid as shown on the Bid Form of the Contract Documents.

Bid Items 4 & 5 – Construction Access This general category of work is separated into Bid Item 4 – Construction Access Route and Bid Item 5 – Floodplain Temporary Access Routes.

Contractor shall provide an Access Improvement Plan, which describes how the project access routes will be improved, maintained, and decommissioned throughout the performance period to provide for construction equipment transportation and crew/fuel access. Include measures that will be taken to mitigate, minimize or eliminate the introduction of sediment into the stream system and other detrimental effects of equipment/personnel accessing the project area. Describe the manner and methods in which the project area will be accessed throughout the period of performance including methods and locations for Temporary River Crossing Structures. Include a description of the types of equipment to be used for crew/fuel transport and measures planned to cross Newsome Creek as needed to complete the Work Bid Item 4 – Construction Access Route Description:

A primitive access route off NF-1858 (Newsome Creek Road) leads to the Site as shown on the Drawings (Sheet C2).

The access route was water-barred and slash was placed to minimize erosion during the spring after completion of the 2015 project phase. Contractor shall remove slash, regrade water-bars, and repair any water damage. Large rocks that were placed in front of the gate shall be moved off the access route for the work period.

Upon project completion, from Reach 2 to gate, Contractor shall reconstruct water bars and surface drainage to minimize winter and spring erosion damage to the access route and place brush on the outside edge of the access leaving a 50-inch wide trail. The gate shall remain and Contractor shall replace barrier rocks in close proximity to discourage ATV access.

Access improvement will be accomplished commensurate with the Contractor’s need for equipment access, materials staging, mobilization and crew transportation, such that sediment introduced to the stream is minimized. The contractor shall conduct operations in a manner that minimizes travel across the designated access route.

Contractor shall accomplish all Work carefully to minimize disturbance outside of work areas and operate heavy equipment between existing shrubs and trees in the riparian zone and floodplain to the extent possible to avoid unnecessary damage.

Such maintenance, reopening, and closing the route shall be incidental to this Bid Item and shall be accounted for by the Contractor as appropriate in their Bid.

Contractor shall take all necessary precautions to prevent damage to all roads including federal, city, state, and county roads during construction due to heavy vehicle loading (including bridges and cattle guards). Contractor shall repair any such damage resulting from construction activities (including grading the road to eliminate ruts caused by heavy vehicle loading).

Materials:

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

Execution:

Work includes, at a minimum:

· Contractor shall re-open the access route from Newsome Creek Road to Reach 2 as needed for construction access.

· Upon project completion Contractor shall reconstruct water bars and surface drainage and place slash on access route leaving a 50-inch wide trail.

· Contactor shall replace rocks at gate to discourage ATV access to the site.

Measurement:

No measurement for Bid Item 4 – Construction Access Route will be made.

Payment:

Payment for Bid Item 4 – Construction Access Route 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 5 – Floodplain Temporary Access Routes Description:

In the floodplain areas, the location and layout of temporary access routes to the project features shall be selected by the Contractor and approved by the Government. Moving numerous downed trees and slash and minor filling of holes may be required, in addition to providing some method for crossing Newsome Creek as needed to access the Work. Decompaction and addition of floodplain roughness, slash, and logs to floodplain access routes will be required after construction. Decompaction promotes water infiltration, improves air movement through the soil, and helps establishment of vegetation.

Contractor shall ensure full access to the site, including across the flowing channel as needed, in accordance with the terms of all permits.

Materials:

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

Execution:

Work includes, at a minimum:

Contractor shall select the location and layout of floodplain area temporary access routes to the project features, to be approved by the Government.

Contractor shall minimize the total length of temporary access routes in an effort to prevent unnecessary disturbance of existing floodplain areas. Temporary access routes shall be utilized only as required for adequate movement around the Site to complete the specified Work.

Upon completion of the Work, Contractor shall decompact the full length and width of temporary access routes. Decompaction shall consist of loosening all of the soil in the utilized construction access road and temporary access route footprint to a minimum depth of 12 inches.

No decompaction Work shall be done during wet weather or when the ground is frozen or otherwise unsuitable as determined by the Government.

Contractor shall incorporate floodplain roughness on all decompacted access routes after the final grade surface is completed.

Contractor shall install slash and logs on all decompacted access routes after the floodplain roughness is completed. .

Contractor shall harvest and install clump plantings as specified in Bid Item 5 – Floodplain Shrub Salvage and Transplant and at the direction of the Government.

Measurement:

No measurement for Bid Item 5 – Floodplain Temporary Access Routes will be made.

Payment:

Payment for Bid Item 5 – Floodplain Temporary Access Routes 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 6 – Floodplain Shrub Salvage and Transplant Description:

There will be occasions when shrubs must be removed in the floodplain for construction. When removed alive, these shrubs can be transported and replanted on Site. Live shrubs are valuable for revegetating project Site areas such as constructed channels and floodplain access routes. The Government will mark shrubs for salvage and locations for transplant at the Site. It is estimated that 50 small shrubs will be transplanted during this Project. Shrubs for transplant shall be no taller than 6 feet.

Materials:

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

Execution:

Work includes, at a minimum:

Government will flag or mark all shrubs to be transplanted.

Contractor shall trim branches prior to transplant at Government’s request.

Contractor shall dig live shrubs for replanting at the Site. Contractor shall dig plant in a single scoop with excavator or other approved method ensuring that the majority of root material is contained in the scoop. Shrub shall be replanted in the same action and shall not be placed in an interim location.

Contractor shall take care to minimize transport distances from original plant location Contractor shall prepare a hole at the Government-approved planting site and replant the live shrub in its new location by placement with excavator.

Contractor shall place loose soil in the hole and thoroughly water within 2 hours to ensure all roots are in contact with soil.

Measurement:

Measurement for Bid Item 6 – Floodplain Shrub Salvage and Transplant will be by the actual number of plants transplanted, as measured by Government.

Payment:

Payment for Bid Item 6 – Floodplain Shrub Salvage and Transplant will be based on the unit price bid per plant as shown on the Bid Form of the Contract Documents. This price shall constitute full compensation for all labor, equipment, tools, supplies, materials, and incidentals necessary to accomplish the work.

Bid Item 7 – Sod Harvest and Replant Description:

This Work consists of the removal, handling, and replacement of existing sod. Harvesting and reusing sod at the Site is a valuable revegetation method. This Bid Item specifically pertains to harvested sod that will be replanted by the Contractor during the Work.

Sod removal will occur at various locations throughout the Site in association with other specified Work items including, but not limited to: Bid Item 9 – Constructed Channel, Bid Item 10 – Fill Areas, and Bid Item 11 – Off-Channel Habitat. Approximately 3,000 square feet of total sod harvest is anticipated in conjunction with this Bid Item. Contractor shall also harvest existing sod at any other areas identified by the Government.

Government will locate and mark sod to be harvested and replanting areas. Coordinate and schedule this work with the Government.

Materials:

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

Execution:

Work includes, at a minimum:

Contractor shall harvest sod in accordance with Sheet D5, Detail 4 of the Drawings and as specified herein.

Sod shall be harvested by removing the top 3 inches of material, keeping vegetation and sod intact in the largest sections possible.

In areas designated by the Government, Contractor shall replace harvested sod. Contractor may be required to immediately replace discrete harvested sod amounts in a nearby or adjacent location.

Contractor shall ensure that the replaced sod’s roots are in direct contact with the soil. Avoid replacing sod over large rocks, tree branches, very rough ground, or anything that prevents root-to-soil contact. Sod placed over such items or without solid root-to-soil contact will be rejected.

During replacement, Contractor shall ensure that harvested sod edges are fully covered with topsoil or adjacent sod, preventing exposure to the air.

Measurement:

Measurement for Bid Item 7 – Sod Harvest and Replant will be by the actual number of square feet (to the nearest square foot) of existing sod harvested and replaced by the Contractor, measured after placement, as measured by the Government.

Payment:

Payment for Bid Item 7 – Sod Harvest and Replant will be based on the unit price bid per square foot as shown on the Bid Form.

Bid Item 8 – Channel Diversion Structures Description:

This Work consists of excavating, backfilling, compacting, and all other tasks associated with channel diversion structure construction. Channel diversion structures, when complete, will divert water from the existing Newsome Creek channel into the design channel alignment on the floodplain. Per the Drawings, there are 3 channel diversion structures.

Materials:

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

Rock/soil fill shall be structural, compactable material. Rock/soil fill shall have rocks up to a maximum size of 6 inches, with a fines content that is suitable for compaction as described below. Materials may be sourced from Site if specification is met. Materials sourced off site must originate from a weed-free pit.

Rock armoring shall be angular, competent material of the approximate gradation in Table 3.

Rock Armor Gradation

Rock filter layer shall be of the approximate gradation shown in Table 4.

Filter Layer Gradation

Topsoil shall consist of natural, friable soil that is representative of soils in the vicinity that produce heavy vegetation growth and is reasonably free from underlying subsoil, clay lumps, cobbles or boulders, noxious weeds, litter, brush, and matted roots. Topsoil material shall be generated from on-site stockpiles shown on Sheet C1 of the Drawings.

Wetland Sod Mats shall be approximately 16 feet X 3 feet coir mat with embedded and rooted native wetland plants such as those provided by North Fork Native Plants or approved equivalent. Sod mats must be installed within 2 days after delivery to the site. Sod mats shall include at least three of the following plant species:

1. Carex nebrascensis

2. Carex lanuginosa

3. Carex aquatilis

4. Carex utriculata

5. Juncus arcticus

6. Eleocharis palustris Pointed Wooden stakes 1” X 2” X 18” Slash and logs as defined in Section 5.0 Incidentals.

Execution:

Work includes, at a minimum:

Contractor shall install channel diversion structures in the existing Newsome Creek channel at the locations shown on the Drawings (Sheet C3, C5, and C7).

Contractor shall dewater the Work area in accordance with Bid Item 3 – Water Management. Work shall occur during dry conditions, and water management shall conform to all permit and environmental requirements and be approved by the Government. Standing water within the channel diversion structure footprint shall be removed before any fill material is placed.

Channel diversion structure shall be constructed in accordance with the details and typical dimensions shown on the Drawings (Sheet D5).

Contractor shall excavate existing ground within the channel diversion structure footprint to a 12-inch minimum depth prior to placing fill material as shown on the Drawings (Sheet D5).

Contractor shall place and compact rock/soil fill in 6-inch maximum lifts until the final top elevation is at least 6 inches higher than the adjacent existing channel top of bank, with upstream and downstream slopes no steeper than 2:1 (horizontal:vertical) slope.

Rock/soil fill shall be adjusted to a moisture content that is suitable for compaction. Operate vibratory compaction equipment over the full width of each 6-inch lift with three complete passes minimum or until visual displacement ceases.

Contractor is responsible for ensuring that compaction requirements are met as specified herein. Testing and results will only be required at the Government’s request.

Contractor shall install a key trench and rock armoring along the channel diversion structure’s upstream and downstream toes. Refer to the Drawings (Sheet D5) for key trench dimensions.

For rock armoring, Contractor shall underlay rock armoring material with a finer rock referred to as the rock filter layer. Extend rock armoring up the channel diversion structure side slope on the upstream side as shown on the Drawings (Sheet D5).

Rock armoring shall be compacted using an excavator bucket or similar compaction method. Compaction shall yield a surface with binding, interlocking rock.

Contractor shall place topsoil over the rock/soil fill to a minimum 12-inch thickness. Taper topsoil down to adjacent existing ground at a 5:1 (horizontal:vertical) slope in all directions. The channel diversion structure’s finished top elevation shall not be greater than 1.5 feet above the surrounding floodplain but shall not be less than 1 foot above the surrounding floodplain. Avoid topsoil compaction to the extent possible to allow for optimal vegetation and growth. Do not drive heavy equipment over topsoil surface.

Contractor shall provide and install wetland sod mats along the channel diversion structure faces as shown on Drawings Sheet D5. Ensure roots are in direct contact with topsoil.

Contractor shall maintain wetland sod mats by watering regularly to keep them moist until Contractor demobilizes from the site or plants are completely dormant as determined by Government.

Contractor shall place harvested sod along the channel diversion structure top in accordance with Bid Item 7 – Sod Harvest and Replant.

After harvested sod and wetland sod mats are in place, Contractor shall place slash and logs on the channel diversion structure at the direction of the Government. Contractor shall develop floodplain roughness and place slash and logs on those disturbed areas surrounding the channel diversion structure.

Measurement:

Measurement for Bid Item 8 – Channel Diversion Structures will be by the design number of bank CYs (to the nearest CY) of material placed for the channel diversion structures, as listed on the Bid Form. Excavation of alluvium within each channel diversion structure footprint is not accounted for in the provided design quantity.

Payment:

Payment for Bid Item 8 – Channel Diversion Structures will be based on the unit price bid per design CY as shown on the Bid Form.

Bid Item 9 – Constructed Channel Description:

This Work covers new channel construction including excavation, haul, and all other tasks associated with completing the Work as specified.