Attachment_1__Statement_of_Work_GDS_final.docx

STATEMENT OF WORK

for

HURRICANE SANDY RESILIENCY PROJECT #50 – Increasing Water Management Capability at Great Dismal Swamp NWR for the Benefit of Wildlife and People

DESIGN/BUILD

WATER CONTROL STRUCTURES

AT THE

GREAT DISMAL SWAMP NATIONAL WILDLIFE REFUGE

SUFFOLK, VA

December 2014

SECTION 1 - GENERAL REQUIREMENTS

The goal of this project is to implement a large scale Refuge water management plan for flood control, fire suppression and habitat management. This includes installing 23 water control structures at 22 sites (A1 to A12 and B1 to B10). Water management will increase water level control in high priority areas to expand groundwater storage and offset previous drainage impacts.

The Refuge was established in 1974 to preserve a large expanse (110,000 acres) of unique wetland habitat. Prior to the establishment of the Refuge, a 150-mile network of roads and drainage ditches was constructed to allow large areas of the swamp to be drained and logged. This drainage network has altered the natural hydrologic flow and storage capacity of the swamp. Rather than the relatively slow and diffuse overland and groundwater flow across long distances that existed in pre-development conditions, water now collects and drains locally through the ditch network in a relatively rapid manner. This altered hydrologic environment has contributed to several water and land management issues, including flooding of nearby communities and agriculture lands, insufficient prevention and suppression of wildfires, and alteration of the wetland habitats. During Hurricane Sandy although over five (5) inches of rain fell on the Refuge, approximately one-half of the water volume was lost within ten (10) days. Other extreme hurricane events have caused Dismal Swamp Canal overflow which resulted in lowering water quality in the Chesapeake Bay, flooding of roads, downing of rare forest trees and subsequent wildfires.

The overall objective of this project is to control water levels and water movement by operating a system of water control structures (WCS) in the ditches. This project will install, repair or replace water control structures and related ditch and access road work throughout the Refuge.

The water control structure installation shall be performed within the Refuge in cities of Suffolk and Chesapeake, Virginia. The proposed work may occur at 22 locations (A-1 to B-10) throughout the refuge as shown in Figure 1, described in Table 1 and Attachments 1-5. The exact structure locations (GPS coordinates) will be provided by the COR. The Contractor will prepare complete designs for all structures. Design work includes construction drawings, construction and material specifications, and cost estimates.

Access to the Refuge is from public roads and is limited to four locations as shown in Figure 1: Martin Johnson Road to Portsmouth Ditch Road (Portsmouth entrance); White Marsh Road to Jericho Ditch Road (Jericho entrance); Desert Road to Railroad Ditch Road (Railroad entrance) and; Desert Road to Corapeake Ditch Road Corapeake entrance).

All bridges and crossings within the Refuge are to be used in their current conditions without structural modifications. The Contractor may request to fortify any bridges or crossings (i.e. a bridge in Area A has low weight limitations) to increase their strength and load limits. The Contractor shall prepare and submit a detailed request to fortify any bridges or crossings (e.g. crane mats placed on the bridge) to the CO for approval.

Site Preparation: The Contractor shall be responsible for preparing the site to complete the work. Preparation includes (not limited to) clearing, erosion control, water control, removing existing damaged culverts, excavating, backfilling, and installing the water control structures and related work. The Contractor shall protect any existing structures at the sites and repair any damage caused by his operations at no additional cost to the U.S. Fish and Wildlife Service (USFWS), including any damage to the site or access roads.

See Table 1, Site Details, for proposed individual site work. During the Design Phase, the Contractor shall coordinate with the COR so that the COR is available to participate in all site visits and act as a member of the Contractor’s project team to ensure the Refuge needs are addressed.

The proposed work is to:

· Remove one culverted half-moon riser

· Repair one half-moon riser

· Replace three existing culverted half-moon risers and replace two culverts with culverted half-moon risers

· Install 10 culverted half-moon risers, five fixed weirs, one earthen plug and one low water crossing

· Improve 2,895 feet of road

Water Control Structures and related work

See Attachment 1 (Water Control Structure and Fixed Weir Dimensions) for specific design requirements. All WCS (except fixed weirs) shall be a minimum of 10 gauge corrugated aluminum meeting H20 loading. Helical CMP shall have re-rolled ends. The COR will provide elevations for all structures. All WCS will include a permanent staff gauge referenced to North American Vertical Datum (NAVD) 88. See Section 2-C.5. Attachments 2-6 and 10 provide general information for each water control structure.

The Contractor shall be responsible for maintaining security for his operations at the site, verifying current gate lock combinations with the Refuge office each week and locking all access gates after entry and exit. The Contractor shall pull the gate shut at Interior and West Ditches to prevent the public from travelling down the southern half of West Ditch during construction south of Interior Ditch.

The Contractor shall coordinate with the COR to locate all work sites. Work shall be performed during normal Refuge operating hours (Monday – Friday 7:00am to 5:00pm), unless otherwise authorized. During the first three (3) Fridays in October and November, the Railroad, Jericho, and Corapeake entrances will be closed to construction access. Construction access is available at Portsmouth during those days.

The Contractor shall plan and execute the work to utilize construction access from the same entry point for any work occurring simultaneously on more than one site within the Refuge (i.e. work occurring on two structure sites at the same time must utilize the same access point).

Damage to Government Property: In the event of damage, including damage by contamination, to any Government property by the Contractor, its officers, agents, servants, employees, subtenants, licensees or invitees, the Contractor, at the election of the Government, shall promptly repair, replace, clean-up, or make monetary compensation for the repair, replacement, or clean-up of such property to the satisfaction of the government.

The following structures and features constituting Government Property are located within and adjacent to the work area: culverts, bridges, water control structures, gates, signs, gravel roads, canals, ditches, and wetlands. This list is not intended to be inclusive and damage to other Government property located within the work area but not listed herein is covered by this provision.

Great Dismal Swamp 1 of 57 January 13, 2015 Figure 1 Proposed Water Control Structure Installation Sites Table 1 Site Details

Table 1 (continued) Site Details

Additional Site Data for Water Control Structures and related work

All sites:

See Attachments 1-5 and 10-11 for specifics and example details for Water Control Structures and related work.

The COR will furnish desired elevations for all water control structures, low water crossings, sheet pile weirs, and road fill elevations.

Clear and grub work area and remove trees/stumps within 25 feet of structure footprint.

Contractor shall furnish, install and remove road signs to direct personnel and equipment to the work sites within the Refuge.

Additional information (typical plans titled Great Dismal Swamp NWR Install WCS, Plans and Details (Sheet 1 of 3) Sections and Details (Sheet 2-3 of 3), dated February 2014 for the stoplog water control structures are provided as Attachment 10 and U.S. Fish & Wildlife Vinyl Sheet Pile Standard Fixed Weir Plans and Notes (Sheet 1 of 2) and Details and Notes (Sheet 2 of 2), dated April 16, 2014 ) for the vinyl sheet pile fixed weir water control structures with timber pile supports are provided as Attachment 11.

The Contractor shall furnish for approval a separate shop drawing for each structure prior to fabrication. Each structure and culvert shall be inspected prior to installation. All structures shall be protected from damage during installation and checked for level of the riser board frames. All water control structures must be protected against flotation by an aluminum base plate (10 gauge minimum) attached to the bottom of the water control structure in lieu of concrete pad indicated in Attachment 10 drawings. The Contractor shall determine the required base plate size using a factor of safety of 1.5. Water tight coupling bands shall be used for any connections. A 10 gauge aluminum anti-seepage collar (9 ft. x 9 ft.) must be attached to the midpoint of each culvert in a secure and water tight manner preventing seepage along the culvert. Some WCS may require anti-seepage collars with a shorter top dimension above the top of pipe to ensure a minimum of six (6) inches of fill between the anti-seep collar and finish grade. The Contractor shall determine the appropriate dimensions.

The bottom 2.0 feet of the front of the riser on culverts 48” or larger is blocked with a welded plate. The culvert invert is 1.0 feet above the base of the riser. The Contractor shall determine the exact height of the riser after completing their site investigations. Shop drawings for all WCS shall be submitted to the CO for approval prior to fabrication.

The Contractor shall furnished aluminum flashboards and all accessories to facilitate leak proof installation and operation for each pre-fabricated aluminum riser. The Contractor will determine the number of 2x6 inch flashboards for each riser to provide complete blockage of the riser from bottom to top. Stoplogs for all water control structures shall have the same lifting peg configuration (spacing and size). The Contractor shall supply each pre-fabricated aluminum riser with a steel stoplog lifting hook that matches peg configuration and is the length of the riser plus twelve (12) inches. Each flashboard will be permanently marked with the structure number (e.g. A5).

Class I riprap will be used to provide bank protection on the inlet and outlet slopes and ditch bottoms of installed water control structures.

Use of roads for hauling of materials and access within the Dismal Swamp must be coordinated with the Refuge personnel to prevent conflicts with other Refuge activities.

Roads must be maintained in passable conditions for 4 wheel drive vehicles at all times. Any road damage shall be the responsibility of the Contractor and the Contractor shall return all Refuge roads to pre-construction conditions upon completion of the work utilizing those roads. After several days of heavy rainfall the roads conditions can rapidly deteriorate.

Water remains in the refuge ditches year-round. Water levels are highest in the late winter, early spring (February, March) and typically lowest in the late summer (August, September). The Contractor is responsible for the removal of surface water and groundwater as necessary to perform the installation of the water control structures.

The majority of the work areas are remote. The Contractor is responsible for providing and maintaining adequate sanitation facilities to its employees while work is in progress.

Black bears frequent the Refuge and may damage supplies, material and equipment or personal items left unattended. The Refuge is not responsible for any damage resulting from animal activity. The Contractor is responsible for removing and properly disposing of all food related trash from the site at the end of each work day, including any food items in work vehicles or temporary construction offices.

Contractor is be responsible for the disposal of all debris and other unusable material generated by the construction of this project and compliance with all local, state and federal laws for proper disposal of these materials. Woody material can be cut and left on site, provided the material is scattered and not stacked in piles. Any stumps removed shall be agitated to remove the majority of soil prior to sidecasting.

Contractor is responsible for ensuring that the exterior surfaces of all vehicles and equipment are thoroughly cleaned prior to entering the refuge each time to prevent the introduction of non-native invasive plant and insect species to the refuge.

All equipment will be washed (following the best management practices (BMP) for washing described at http://dnr.wi.gov/topic/Wetlands/documents/WetlandInvasiveBMP.pdf) prior to arriving at the refuge and prior to leaving any site to avoid cross contamination of the habitats. Thorough washing of all equipment and reusable materials used at Site B1 (Interior Ditch) is required prior to transport from the B1 site to prevent the spread of alligator weed to other areas of the refuge. COR will provide additional specifics.

Fueling, changing oil, hydraulic fluid or lubricating equipment shall be done in an area and in a manner so as to prevent any oil, grease or fluids from contaminating soil on the construction site or reaching the ditches or groundwater.

The Contractor will prepare complete designs for all structures and the three road improvements. Design work includes construction drawings, construction and material specifications, and cost estimates. Construction drawings and specifications shall include proposed access, limit of disturbance (LOD), staging area(s) and plans to manage water during installation of the water control structures. Costs will include providing construction management / project management and quality control / assurance as well as documents and information to support the USFWS in obtaining all permits necessary for construction of the project.

The anticipated cost range for these projects will be provided by the Contracting Officer, which shall include design and construction.

Bonding and insurance, as required, will be obtained by the Contractor.

Davis-Bacon wages also apply to this project.

Additional site information:

Site A1:

Site A1 is located immediately south of the gated entrance to Portsmouth Ditch Road, where Portsmouth Ditch intersects Big Entry Ditch (Figure 1). The work consists of the repair of the existing 120-inch half-moon riser bottom well by pouring concrete into the well flush with the top of the well.

Site A2:

Site A2 is approximately 9,960 feet (1.88 miles) south of the gated entrance to Portsmouth Ditch Road, where Portsmouth Ditch road intersects Rosemary Ditch (Figure 1). The work consists of the replacement of the existing deteriorated 60 inch culvert with a 96-inch half-moon riser with a 60-inch culvert adjacent to existing concrete headwall. The work consists of removing and disposing of the existing culvert. The concrete headwall attached to the existing structure will be left in place and the pipe opening blocked and pumped with concrete. Additional fill will be necessary to fill the voids left from the loss of bank material resulting from the failure of the previous structure.

Site A3:

Site A3 location is approximately 9,650 feet (1.83 miles) east of the gated entrance to Portsmouth Ditch on Big Entry Ditch Road (Figure 1). There are two design and construction components for this site. The easternmost 1,000 feet of Big Entry Ditch Road requires clearing of shrubs and saplings and filling and grading to repair areas of the road washed out by previous storm events. After road construction is complete (15 ft. width), one 96-inch half-moon riser with a 60-inch culvert shall be installed at the mouth of Rosemary Ditch where it flows into Big Entry Ditch.

Site A4:

Site A4 is on Rosemary Ditch approximately 12,300 feet (2.33 miles) east of Portsmouth Ditch and 22,260 feet (4.22 miles) south of the gated entrance to Portsmouth Ditch Road (Figure 1). The work consists of removing and disposing of the existing timber bridge and installing a 96-inch half-moon riser with a 60-inch culvert in Rosemary Ditch where an old bridge crosses the ditch.

Site A5:

Site A5 is on Northeast Ditch at the junction with Portsmouth Ditch, approximately 12,104 feet (2.29 miles) south of the gated entrance to Portsmouth Ditch Road (Figure 1). The work consists of installing an 84-inch half-moon riser with a 48-inch culvert under Portsmouth Ditch Road to connect Portsmouth Ditch with Northeast Ditch.

Site A6:

Site A6 is at the southern terminus of Hardwood Ditch at its junction with Portsmouth Ditch, approximately 20,480 feet (3.9 miles) south of the gated entrance to Portsmouth Ditch Road (Figure 1). The work consists of the removing and replacement of the existing failing 36-inch half-moon riser and culvert with a 96-inch half-moon riser with a 60-inch culvert. The half-moon riser will be installed within the footprint of the existing structure to connect Portsmouth Ditch with Hardwood Ditch.

Site A7:

Site A7 is at the southern terminus of Hardwood Ditch at its junction with Portsmouth Ditch, approximately 20,480 feet (3.9 miles) south of the gated entrance to Portsmouth Ditch Road (Figure 1). The work consists of the removal of the existing failing 36-inch half-moon riser and culvert draining from Hardwood into Portsmouth Ditch (immediately north of structure A6). Additional earth fill will be necessary to fill in the void where the structure was located and raise the grade of the berm to approximately one foot above existing berm elevation once the water control structure is removed.

Site A8:

Site A8 location is on Portsmouth Ditch, approximately 20,480 feet (3.9 miles) south of the gated entrance to Portsmouth Ditch Road (Figure 1). One 96-inch half-moon riser with a 60-inch culvert will replace an existing road crossing/dam. The concrete, wood and earthen structure is to be removed. The half-moon riser will be installed in the same location in Portsmouth.

Site A9:

Site A9 is on Portsmouth Ditch approximately 125 feet south of the junction with Juniper Ditch and 10,815 feet (2.04 miles) south of the gated entrance at Portsmouth Ditch Road (Figure 1). The work consists of removal of trees, shrubs and saplings to provide access to the site, removal of existing deteriorated weir materials and any loose material within the ditch and the construction of an earthen plug (berm).

Site A10:

Site A10 is on Juniper Ditch approximately 450 feet west of the junction with Portsmouth Ditch and 10,660 feet (2.02 miles) south of the gated entrance at Portsmouth Ditch Road (Figure 1). There are two design and construction components for this site. The site requires the clearing and grading of approximately 450 feet of ditch berm for access including the filling and grading of breach in the berm. After the access road is complete (15 ft. width), two 96-inch half-moon risers with 60-inch culverts shall be installed in Juniper Ditch where an old bridge crosses the ditch.

Site A11:

Site A11 is located on Portsmouth Ditch immediately south of the junction with Juniper Ditch and 10,690 feet (2 miles) south of the gated entrance at Portsmouth Ditch Road (Figure 1). The work consists of the excavation of the existing earthen plug in Portsmouth Ditch, the installation of a 96-inch half-moon riser with a 60-inch culvert within the remaining plug and backfilling.

Site A12:

Site A12 is on Big Entry Ditch west of Portsmouth Ditch. The exact location for the fixed weir will be determined by COR in the field at time of construction. The weir location is anticipated to be approximately 5,590 feet (1.06 miles) west of the gated entrance at Portsmouth Ditch Road (Figure 1).

Vinyl sheet pile water control structure specifications are shown in Attachment 1 Table 3. The COR will provide critical elevations for the fixed weir. See typical details in Attachment 3.

Site B1:

Site B1 is approximately 27,289 (5.17) miles and 32,275 feet (6.11 miles) southeast of the gated entrance to Railroad Ditch Road at two locations on Interior Ditch east of its junction with West Ditch (Figure 1). Install two fixed weirs on Interior Ditch. Weir 1 is located at the midpoint and Weir 2 is located near Lake Drummond. The Refuge will remove the temporary sheet pile weirs post construction.

Vinyl sheet pile water control structure specifications are shown in Attachment 1 Table 3. The COR will provide GPS locations and critical elevations for the fixed weir. See typical details in Attachment 3.

Site B2:

Site B2 is approximately 29,257 feet (5.54 miles) southeast of the gated entrance to Railroad Ditch Road, where West Ditch Road intersects Lateral Ditch (Figure 1). Work consists of the installation of a 72-inch half-moon riser with a 36-inch culvert under West Ditch Road to connect West Ditch with Lateral Ditch. Minor clearing of vegetation will be required to place the eastern section of culvert.

Site B3:

Site B3 location is approximately 33,243 feet (6.3 miles) southeast of the gated entrance to Railroad Ditch Road just east of the junction of West and South ditches (Figure1). Work consists of the installation of two 96-inch half-moon risers with 60-inch culverts in South Ditch.

Site B4:

Site B4 is on Riddick Ditch approximately 56,263 feet (10.66 miles) southeast of the gated entrance to Railroad Ditch Road (Figure 1). There are two design and construction components for this site. The work consists of the filling, compacting, grading and the placement of gravel over geotextile on approximately 1,445 feet of degraded roadbed. After road construction is complete (15 ft. width), one 96-inch half-moon riser with 60-inch culvert shall be installed in Riddick Ditch where an earthen berm is currently located.

Typical plans titled Site B4 for road restoration are shown on Attachment 6.

Site B5:

Site B5 is on South Martha Washington Ditch north of Persimmon Ditch. The work consists of the installation of a fixed vinyl sheet pile weir.

Vinyl sheet pile water control structure specifications are shown in Attachment 1 Table 3. The COR will provide critical elevations for the fixed weir. See typical details in Attachment 3.

Site B6:

Site B6 is located on Railroad Ditch east of its junction with West Ditch and the low water crossing site (B7), approximately 12,695 feet (2.4 miles) east of the gated entrance to Railroad Ditch Road (Figure 1). The work consists of the installation of a fixed vinyl sheet pile weir.

Vinyl sheet pile water control structure specifications are shown in Attachment 1 Table 3. The COR will provide critical elevations for the fixed weir. See typical details in Attachment 3.

Site B7:

Site B7 is located on Railroad Ditch east of West Ditch. The work consists of constructing a low water crossing and involves excavation of the existing roadbed. Slopes entering and exiting the crossing from existing roadbed will be a minimum of 15:1. Slopes grading to adjacent side slopes will be a minimum of 5:1. Geotextile is required under the low water crossing. Typical plans titled Site B7 for a low water crossing are shown on Attachment 5. Details for the low water crossing are:

Site B8

Site B8 location is on Railroad Ditch west of its junction with West Ditch, approximately 8,976 feet (1.7 miles) of the gated entrance to Railroad Ditch Road (Figure 1). An existing deteriorated 24-inch culvert under Railroad Ditch Road will be replaced with a 48-inch half-moon riser and 24-inch culvert in the same location.

Site B9

Site B9 location is on Camp Ditch at its junction with East Ditch, approximately 43,510 feet (8.24 miles) of the gated entrance to Jericho Ditch Road (Figure 1). The work consists of the removal of an existing deteriorated 36-inch culvert and the installation of a 96-inch half-moon riser with 60-inch culvert.

Site B10

Site B10 location is on Camp Ditch at its junction with Jericho Ditch, approximately 31,552 feet (5.9 miles) of the gated entrance to Jericho Ditch Road (Figure 1). The work consists of the removal of an existing deteriorated 48-inch half-moon riser and culvert and the installation of a 96-inch half-moon riser with 60-inch culvert.

1.02 GENERAL SITE DESCRIPTION

The Great Dismal Swamp National Wildlife Refuge (Refuge) is located in southeastern Virginia and northeastern North Carolina. The work shall be performed within the Refuge in Cities of Suffolk and Chesapeake, Virginia. The goal of this project is to control water levels and water movement by operating a system of water control structures in the ditches. This project will install, repair or replace water control structures and related ditch and access road work throughout the Refuge.

This project will allow implementation of a large scale Refuge water management plan for flood control, fire suppression and habitat management. Water management will increase water levels control in high priority areas to expand groundwater storage and offset previous drainage impacts.

The goals of this project are to:

1.03 SCHEDULES FOR PROJECT

A. Within 15 days after receipt of notice to proceed from the Contracting Officer, the Contractor shall prepare and submit a proposed detailed schedule with milestones for all aspects of the project for review and approval by CO. Milestones should include the data collection, design phases at 60%, 90% and completion. The timeline should also incorporate the required regulatory reviews and permitting.

B. Within 120 calendar days after receipt of notice to proceed from the Contracting Officer, the Contractor shall complete the designs for all structures and the three road improvements, including construction drawings, construction and material specifications, and cost estimates.

C. The timeframe for construction will be determined after the designs are completed, and the extent of work is defined; however, the design and construction of the water control structures shall be completed by September 2, 2016 and final payment made by October 31, 2016.

D. The Contractor shall prepare a proposal and perform the work in two phases, as listed below:

1. Phase I- Design Services: The design phase shall chart the following sequence: investigations of the sites, design of the structures, the three road improvements, and related work, review and approval of the 60%, and 90% designs, final approved designs, cost estimates, construction drawings, construction and material specifications, and operation and maintenance plan. Design services include documents and information to support the USFWS in obtaining all permits necessary for construction of the project. Design and permit review meetings will be scheduled to coincide with these milestones.

No activity involving ground disturbing alteration or disturbance, including test pits or other activities subject to compliance with Section 106 of the National Historic Preservation Act (NHPA), may occur until the USFWS has obtained State Historic Preservation Office (SHPO) clearance and has consulted with the Tribal Historic Preservation Officers (THPOs) as appropriate. Phase 1 investigations requiring the staggered 8-meter interval shovel test grid are not required under design services.

During design phase the Contractor shall submit to the CO the location(s), type/methods and activities involving ground disturbing alterations or disturbances for geotechnical investigations or other Section 106 triggering activities. The USFWS will use that information to obtain State Historic Preservation Office (SHPO) clearance and consult with the Tribal Historic Preservation Officer (THPO).

2. Phase II- Construction: Using the approved designs and drawings and specifications, the selected water control structures and related work will be completed at each location. No activity involving ground disturbing alteration or disturbance (including test pits) may occur until the USFWS has SHPO clearance and consulted with the Tribal Historic Preservation Officer (THPO).

SECTION 2 - DESIGN SERVICES

A. DESIGN SERVICES:

For the purposes of obtaining field information for design development, the Contractor shall visit the work areas described above and provide a report on the existing conditions at the sites. The report shall include findings and recommendations to complete the work outlined in this statement of work.

B. The Contractor shall prepare designs, technical specifications, final drawings and construction cost estimates as defined within this scope of work.

C. DESIGN REQUIREMENTS

1. The Contractor is responsible for obtaining the necessary field information to properly analyze, design, and construct the project. The design must be engineered for the specific environment of the site, specific site data, specific water control structure sizes provided by the Service, and existing site conditions. The Contractor is responsible for all design and drawings detailing the project as well as all aspects of the construction work. The Contractor is responsible for the quality control of its own work and work performed by its subcontractors and their subcontractors.

2. Compliance with codes and standards. Project design shall be in compliance with all applicable Federal, State of Virginia, and local standards and codes, including environmental compliance.

3. The project costs shall include all expenses required for the project, including travel, lodging and meals, overhead costs, such as telephone, fax, in-house reproductions, and U.S. mailings.

4. Subsurface Investigations- Subsurface investigations, including geotechnical investigations, soil borings and test pit excavations, are not included or required to complete the work.

5. The Contractor is responsible for all survey work required to complete the work. Install permanent Benchmarks monuments at each proposed site A1 thru B10. All installed monuments may be established with survey-grade static occupation according to NGS standards. All elevations shall be determined using surveying equipment registered to NAVD 88 datum. All information collected will be made available to USFWS in electronic format. Existing structures, roads, ditches, wetlands, and other vegetated areas found within the limits of disturbance (LOD) shall be delineated on the Drawings.

The Service has established vertical reference marks at the construction sites that will be used as an elevation reference for setting the inverts of the water control structures. The Service will provide the desired elevations of the upstream and downstream inverts of the water control structure. The Contractor will ensure the invert elevations are within +/- 0.10-ft of the desired elevation.

The staff gages installed at each newly constructed water control structure will be installed upstream of the new structures so water level observations are not affected by velocity head drawdown during high flow events. Staff gages will be referenced NAVD 88 by differential leveling to permanent benchmarks installed under 5, above. Results of differential leveling between staff gage and permanent benchmarks will be provided to USFWS. Only US Geological Survey (USGS) Style A plates will be used. Gage plates will be numbered so water level observations in the field will be relative to NAVD 88.

6. Prior to construction, the Contractor shall prepare and submit written plans for:

7. The Contractor shall submit all design reports and design documentation along with As-Built construction drawings stamped by Professional Engineer licensed in Virginia, construction inspection and material certification records.

D. PERMITS

1. Permits required to perform work within the Refuge, including environmental permits, shall be obtained by the Refuge, except as noted below. The Contractor will perform all services necessary to assist the USFWS to obtain these permits necessary to complete the project. The proposal shall include all costs associated with assisting USFWS to obtain all permits.

The Contractor shall, without additional costs to the Government, be responsible for obtaining all licenses and permits necessary to comply with Federal, State, and municipal laws, codes and regulations applicable to supplying labor, materials and all other support to construct the work. Included are any costs for licenses and permits necessary to disposal of excess or unusable materials.

Permits required before construction can begin include (but are not limited to):

The Contractor will perform all services necessary to assist the USFWS to comply with the National Historic Preservation Act (Sec. 106). As needed and directed by the CO, the Contractor will perform the background research, field investigations and prepare reports for USFWS use in coordinating with SHPO and consulting with the THPO. The cultural resource studies performed to assist USFWS to comply with the National Historic Preservation Act (Sec. 106) shall conform to USFWS Region 5 and SHPO standards. USFWS Region 5 standards are available upon request to the CO. The more stringent standard shall apply where there are any differences between the USFWS Region 5 standard and the SHPO standard (Attachment 6, Standards for Archaeological Resource Identification Studies on Region 5, U.S. Fish & Wildlife Service Lands ( July 22, 2014). Prior to beginning any ground disturbing alteration or disturbance (including test pits) the Contractor shall prepare and submit a cultural resources plan to the CO for review and approval. The cultural resources plan will describe the Contractor’s methodology to address compliance with National Historic Preservation Act (Sec. 106).

E. PROGRESS SUBMISSIONS & FINAL DOCUMENTS

Drawings:

1. A minimum of three (3) copies of at least size (Arch D Size) design review drawings (including WCS shop drawings prior to fabrication) shall be provided to the Government in electronic format in AutoCAD 2013.DWG format and .pdf formats on CD-ROM disks, email, and hard paper copies.

2. A minimum of three (3) copies of full size (Arch E Size) final design drawings shall be provided to the Government in electronic format in AutoCAD 2013.DWG format and .pdf formats on CD-ROM disks, email, and hard paper copies. Copies of each drawing, stamped and signed by a Virginia registered professional engineer, shall also be provided.

3. Specifications: A minimum of three (3) copies of review and 100% specifications in Microsoft Word 2010 format shall be provided on the same CD-ROM disk as the drawings, and shall be emailed, along with hard paper copies.

4. Contractor shall follow Project Management Institute’s (PMI), strategies, procedures, and tracking for the duration of the project. Contractor will establish and provide scope, schedule and cost baselines at the beginning of contract and track all progress and deviations against these baselines. Contractor shall use earned value management to track progress of the entire project as well as provide EVM reports, Pert, and Gantt charts as appropriate and provide monthly updates to the Contracting Officer, and when invoices are submitted. Deviations greater than +/- 5% from the approved baseline should also include corrective action strategies stating how the project will be brought back on track. Changes to the approved baseline must be approved by USFWS. Submittals shall be provided in electronic format and in the form of PDF and/or MS-Excel, Word, and Project 2011. Paper versions, in addition to electronic files are acceptable.

5. The Contractor shall mail design and construction submissions, consisting of, but not limited to, reports, drawings, specifications, and cost estimates to the following persons (3 hard copies and 1 electronic copy to David Byrd; and two hard copies and 1 electronic copy to Laura Conant):

Laura Conant Contract Specialist Region 5 USFWS Northeast Regional Office U.S. Fish and Wildlife Service 300 Westgate Center Drive Hadley, MA 01035 Tel. 413-253-8389 laura_conant@fws.gov

David Byrd Fish and Wildlife Biologist Contracting Officers Representative Great Dismal Swamp NWR 3100 Desert Road Suffolk, VA 23434

(757) 986-3409 x102 david_byrd@fws.gov

SECTION 3 - CONSTRUCTION

A. The Contractor shall construct the project in accordance with the design drawings developed, approved and selected for installation by CO, and will provide construction administration.

B. Shop Drawings

1. The Contractor’s Professional Engineer shall review all shop drawings during the construction phase of the project prior to submittal to the COR.

2. The work shall include the review of all materials to be incorporated into the project for conformance with the design and contract documents.

C. Project Meetings/Site Inspections

1. Project meetings/site inspections will be required based on project requirements established in the approved plans for Contractor construction inspection and Contractor construction quality control. The Contractor’s Professional Engineer shall observe and oversee the construction activities, and advise the Government of any deviations, deficiencies or solutions to issues discussed. (See Project Management reporting requirements above).

2. The Contractor’s Professional Engineer shall follow each site visit with a letter report describing all discussions and findings. A site inspection report which includes the purpose of the inspection, items reviewed, deficiencies observed, recommendations and additional actions required, shall be furnished to the Government.

3. The Contractor’s Professional Engineer will schedule with the CO/COR to conduct a conduct a final inspection when the project is complete. The Contractor’s Professional Engineer shall prepare a final punch list for all deficient work noted, and correct the deficient work in collaboration with and under direction of the contracting office.

D. Contractor Safety

1. The Contractor shall provide and maintain work environments and procedures which will safeguard the public and Government personnel, property, materials, supplies, and equipment exposed to contractor operations and activities. A written safety plan will be submittal for review and concurrence prior to beginning work. This includes a spill prevention and response plan.

2. Safety Regulations. The Contractor is responsible for ensuring that all on-site activities, equipment, and facilities constructed by the Contractor, subcontractor, or supplier conform fully to the standards of the Department of Labor, Occupational Safety and Health Administration (OSHA) 29 CFR 1926 and 1910.

3. Accident Reporting. The Contractor is responsibility for reporting all accidents and injuries to the Contracting Officer (CO) and/or Contracting Officer’s Representative (COR). Federal (including USFWS and OSHA), State, and local agencies have the right to conduct accident investigations if needed. In addition, the Contractor’s safety record may be requested and reviewed before awarding a contract.

Attachments Additional Data and Example Site Plans

Attachment 1 – Water Control Structure and Fixed Weir Dimensions Attachment 2 – Typical Water Control Structure Details Attachment 3 – Typical Fixed Weir Details Attachment 4 – Earthen Plug Details Attachment 5 – Typical Low Water Crossing Details Attachment 6 – Riddick Road Profile Attachment 7 – Standards for Archaeological Resource Identification Studies on Region 5, U.S. Fish & Wildlife Service Lands Attachment 8 – Pictures of Existing Water Control Structures Attachment 9 – Pictures of Typical New Water Control Structures Attachment 10 – Example Fixed Weir Plans

Attachment 1 Table 2

Table 2 Water Control Structure Dimensions Elevations will be provided by COR

*Final riser height to be determined after completion of contractor surveys

Attachment 1 Table 3

Table 3 Fixed Weir Dimensions (See Typical Details Attachment 3) Elevations will be provided by COR

Attachment 2 Typical Water Control Structure Details

Attachment 3 Typical Fixed Weir Details

Attachment 4 Earthen Plug Detail

Attachment 5 Typical Low Water Crossing Detail

Attachment 6 Typical Road Restoration Detail

Attachment 7

STANDARDS FOR

ARCHAEOLOGICAL RESOURCE IDENTIFICATION STUDIES ON REGION 5, U.S. FISH & WILDLIFE SERVICE LANDS

This Version: July 22, 2014

INTRODUCTION

The purpose of these standards is to ensure that archaeological resource identification studies on Region 5 (hereafter, the Region) U.S. Fish & Wildlife Service (Service) lands meet the performance standards required for studies done by the Regional Archaeological Staff or contracted by the Service. These standards apply to all non-Service entities in the Region, including private individuals, institutions, and corporations, as well as other federal, state, or local government agencies.

Performance to these standards is intended to ensure comparability and reliability of information on archaeological resources within Service property, and also to ensure that the Service’s requirements for background data collection, sampling method and intensity, and material analysis and conservation are fully understood by Cultural Resource Management (CRM) consultants. The latter is particularly important if a Phase I CRM study is proposed as part of a project’s National Environmental Policy Act (NEPA) and/or National Historic Preservation Act (NHPA) compliance.

The Service understands that standards for Phase I survey fieldwork and reporting issued by the State Historic Preservation Office (SHPO) in each of the 13 states covered by Region 5 differ from these standards to varying degrees. CRM consultants are assumed to be aware of the applicable SHPO standards. Where differences exist between the Service’s and the SHPO standards, the stricter standard will apply. If a direct conflict in requirements appears to exist, the Regional Historic Preservation Officer (RHPO) should be informed prior to the archaeological survey, so that the conflict can be resolved before the fieldwork is performed.

REQUIREMENTS

CRM consultants (key personnel, including all individuals directing work in the field) should be able to provide documentation to confirm that they fulfill the Secretary of the Interior’s Standards for practicing archaeology on federal lands.

STUDY COMPONENTS

Studies will be accomplished in phases involving background and literature review, fieldwork, analysis of data obtained through the fieldwork, and management recommendations (including impact evaluation in the case CRM studies).

1. Background and Literature Review. This element should expand upon and synthesize extant data. It should include general prehistoric and historic background supplemented by locally specific archaeological data and paleoecological and geological reconstruction. Site records and reports of previous studies in the vicinity should be examined at the SHPO and elsewhere, to place recorded sites in context. In addition to published texts and maps, some recourse to unpublished records and collections, and interviews with knowledgeable individuals in the vicinity will probably be necessary. The resulting body of data will need to be synthesized, placed in the larger context of local, state, and regional prehistory and history, and explicitly tied to the report conclusions.

2. Fieldwork. Phase I fieldwork will typically be done with the intention of determining presence of archaeological resources. As discussed in the section on Recommendations (below), CRM consultants undertaking CRM surveys are advised to also obtain a preliminary determination of vertical and horizontal dimensions of any located archaeological sites, the contextual integrity of cultural deposits, and cultural affiliation of components. The report should contain a justification of the methodology used, and detailed description of the testing program.

a. Standard Testing Strategy. The strategy outlined below is expected for all CRM related fieldwork, unless a rationale for other approaches has been approved by the RHPO. As outlined at the end of this section, alternative strategies may be desirable and effective for other types of studies or CRM studies in specific environments.

A staggered, 8-meter interval shovel test grid is the standard for work performed by Service Archaeologists and contractors employed by the Service in this Region. Shovel test pits shall measure 50 x 50 cm square, and shall be excavated to a depth of at least 50 cm below the ground surface and to the depth of sediments that are over 12,000 years in age. Extensive professional literature and the Service Archaeologists’ considerable personal experience have both consistently shown that larger intervals are unlikely to locate small sites expected in the environmental setting which characterize most of our Region’s National Wildlife Refuges. Conversely, most sites found by our surveys would have been missed by testing intervals exceeding this interval, especially if intervals of 15-25 meters (minimum intervals in SHPO standards for some states) had been employed.

For similar reasons, use of small diameter excavation tools, such as post hole diggers, augers or corers, is not generally approved except as a supplement to shovel testing. The probability of intercepting archaeological material or features and correctly identifying them has been shown to decrease dramatically if such tools are employed exclusively. However, these tools are often appropriate to recover evidence such as geomorphology, palynology, or evidence of modern disturbance.

All identified features must have soil profiles…