A04 Statement of Work.docx

Statement of Work Design-Build: Lahontan NFH Well #4 and Well #6 Rehabilitation

1. GENERAL: The US Fish and Wildlife Service, Lahontan National Fish Hatchery, has a request for Design/Build services to replace Well #6 and to improve control building, electrical, control and mechanical systems for Well No. 6 and Well No. 4.

BACKGROUND: The Lahontan National Fish Hatchery was authorized as part of the Washoe Project in 1956 to re-establish the fisheries in Pyramid Lake in Northern Nevada. It began raising Lahontan cutthroat trout (LCT) in 1967 and currently distributes LCT throughout their Western native range that includes the Tahoe, Walker, and Truckee river basins.

The hatchery was initially constructed and became operational in 1968 and has been continually modified and expanded since then. The hatchery was originally constructed as a single pass facility operating on water from the East Fork of the Carson River. Following an outbreak of whirling disease (Myxobolus cerebralis) in 1970 the hatchery water supply was changed to ground water from a number of wells and a reuse system that treats the water through a biofitration system. It currently obtains its water from four production wells, one of them being Well #3.

Well No. 6 was constructed in 1965. The well log describes a well drilled to 804 feet, and constructed with 704 feet of 16-inch diameter well casing with 0.250-inch wall thickness. The casing had 0.125-inch factory perforations from 100 to 700 feet with ¼-inch minus gravel filter pack filling the 16-inch by 24-inch borehole annulus. Initial production was reported to be 2,000 gpm from a depth of 380 feet. Static water level was reported to be 40 feet.

In 2017, Well 6 began producing large amounts of sand. A video survey was performed showing 16-inch casing partially collapsed at 455 feet. The 16-inch casing was subsequently swaged out and a 5-foot patch was installed from 452.9 to 457.9 feet. After repairing the 16-inch casing, a 12-inch by 0.250-inch wall casing was installed from surface to 700 feet. The 12-inch casing was perforated (factory quad row mill 0.080-inch slot) from 140 to 700 feet with 1/8 to 1/4-inch gravel filter pack filling the 16-inch by 12-inch annulus from 102 to 700 feet and a seal placed in the annulus from 102 feet to the surface.

After the well rehabilitation in 2017, a new Goulds 9WAHC, 3 stage, 6.6875-inch trim submersible pump with 100-hp motor was installed on 520 feet of 6-inch pump column. Electrical service to the pump is 3-phase 480V overhead power provided by NV Energy. Backup power is provided by a Cummins Onan 175 kW diesel generator. The generator, transfer switch, and electrical panels are located in a wood framed control building along with communication equipment. Fuel storage for the backup generator consists of a 250-gallon capacity concrete encased steel tank by Convault. The external fuel tank is set on a concrete slab adjacent to the control building.

Current production ranges from 400 to 500 gpm.

Based on the age of Well No. 6 and its current production, development of a new well is recommended. Based on the age of the existing backup equipment, and anticipated increase in pump power requirements, it is recommended that the backup genset and associated electrical componentry be replaced. Likewise, in order to meet genset and electrical equipment space requirements, a new control building is also recommended. The proposed Well No. 6 rehabilitation design will also incorporate an upsized fuel storage tank to extend the backup power run time. The existing communication equipment will be salvaged.

Well No. 4 was recently reconstructed and consists of a new 75-hp pump. In order to meet genset and electrical equipment space requirements, a new control building is recommended at Well No. 4 as well as incorporating an upsized fuel storage tank. The new Well No. 4 did not have a pressure reducing valve incorporated into the mechanical system. This feature has since been recommended to be incorporated.

The USFWS developed a 35% concept design and draft technical specification for replacement of Well No. 6. 35% concept designs were also developed for electrical, controls, mechanical and other site improvements associated with Well No. 6 and Well No. 4. The 35% designs incorporate both specific and performance design criteria and were developed for the purpose of ensuring the design/build contractor incorporates the pump, electrical, control and mechanical features desired by the USFWS. The design/build contractor is responsible for the final design for all project features. These features may vary to that of the concept designs provided by the USFWS.

2. SCOPE: Provide Design/Build, and construction support services to drill, develop, pump test and commission a new well to replace and abandon Well No. 6 at the Lahontan National Fish Hatchery. For both Well No. 6 and Well No. 4, the project will also include replacement of the generator, control building and fuel tank. The work shall be done by contractors licensed in the State of Nevada applicable to the work being performed. More specifically provide all labor, equipment and materials necessary to:

a) Design Pilot/Test Borehole - The pilot borehole shall be drilled to a depth of 1000 feet. The location of the pilot/test borehole shall be a minimum distance of 50 feet from the existing Well #6, but within the existing legal easement. The final location shall be approved by the FWS. The contractor shall submit the design for approval before construction can begin. The contractor shall be responsible for obtaining all permits required for construction of all required wells associated with this project. The contractor shall be responsible for coordinating shutdown of Well 6 pumping operations during well drilling and construction. The existing Well 6 shall not be operated during construction of the new Well 6.

b) Construct/Drill Pilot/Test Borehole

1) Mobilize on to the site.

2) Drill and log the Pilot/Test Borehole. Drill to the contracted maximum depth unless ordered to stop. If a reasonable estimated water yield is not reached by the time the well is drilled to the contracted maximum depth, the FWS may require the contractor to continue drilling at the same contracted per lineal foot cost until ordered to stop.

3) Prep and perform Geophysical Electric Logging of Pilot/Test Borehole.

4) Plumbness and alignment shall follow AWWA A100-15.

c) Design Production Well – The design shall be based on the following criteria and from the information obtained from the pilot/test borehole. The contractor shall submit the design for approval before construction can begin.

1) The well casing outside diameter shall be a minimum of 14.5”

2) Casing thickness shall be as required by the depth and diameter of the casing as per AWWA 100 and the Nevada Administrative Code 534.

3) Casing shall be either Stainless Steel or High Strength Low Alloy (HSLA) steel.

Copper is a toxic element to fish. The content of copper in the well casing and screen shall not exceed the quantity specified in ASTM 606/606M for HSLA.

4) Well screen shall be louver screens.

5) The gravel pack shall be as supplied by SRI Supreme or approved equal.

d) Construct/Drill Production Well.

1) Ream pilot borehole, and construct production well with appropriate casings, seal, and gravel pack.

2) Develop the well.

3) Plumbness and alignment shall follow AWWA A100-15.

4) Conduct step-rate and constant-rate pumping tests.

e) Pilot Borehole and Production Well Cuttings and Fluids

1) Drill cuttings shall be hauled off site to a location on the Lahontan National Fish Hatchery.

2) There is not enough area within the existing legal easement to construct developmental water collection pits or mud pits needed for the project. The contractor may arrange with the adjacent private landowner(s) at his own risk and expense the use of their property for constructing pits. Written documentation of the agreement between the parties shall be submitted to the FWS for their records.

3) If drilling mud is used the well shall be developed to remove all drilling mud residue from the well to minimize the contamination of the fish production water.

4) The contractor shall be required to file for a Nevada State Division of Environmental Protection (DEP) Deminimis – Clean Water Discharge Permit NVG201000 which will allow for discharges of water associated with drilling of new water wells. The contractor shall also file a Temporary Permit pursuant to NRS 445A.485 which covers discharges from remediation and disinfection activities, well pump testing, aquifer drawdown testing, and other discharges of a temporary nature. The contractor shall use best management practices such as silt fencing and wattles to minimize siltation into nearby surface waters.

f) Design Pump - The new pump shall be designed based on a required minimum design yield of 900- gpm or the agreed upon yield based on the results of the pumping tests, the calculated head conditions and other design criteria needed for the proper design of the pump. The pump shall be a 900-gpm water-lubricated vertical turbine pump with compatible 3-phase electric motor. The pump shall be plumbed into the existing distribution piping system. The pump controls shall be located and connected to the newly designed electrical system in the new control building.

The contractor shall submit the final control building, electrical and mechanical design for approval before construction can begin.

g) Install Pump.

1) Mobilize on to the site.

2) Layout, install and commission the new pump, pump controls, magnetic flow meter (government furnished) and electrical service. Plumb discharge into the main transmission line with blow off.

3) Disinfect the Production Well and perform Bacteriological testing.

h) Abandon Existing Well #6. The well is approximately 700 feet deep. The contractor shall follow all state requirements for abandoning the existing well. The contractor shall be responsible for obtaining all permits required for abandoning the existing well. Dispose of any nonessential remaining existing fixtures/fittings offsite.

i) Design Control Buildings. The design, sizing and configuration of the final control buildings for Well 4 and Well 6 shall be the responsibility of the contractor based on parameters listed below. The contractor shall submit the design for approval before construction can begin:

1) Incorporate any cost savings that would be realized if this task were considered as part of the base bid.

2) Each new control building will be a pre-engineered metal building (PEMB) set on a concrete foundation.

3) The concept Well No. 4 PEMB control building is approximately 20’-0” wide by 12’-0” long by 10’-0” tall (eave height). The floor plan dimensions are based on providing adequate spacing for the backup generator, electrical and communications equipment, and overhead clearance for the backup generator exhaust. The building will include a metal double leaf door measuring 6’ wide by 8’ tall and single personnel access door. The double leaf door is required for installation of the backup generator. The building will be fitted with a mechanical louver for the backup generator air intake. Both walls and roof will be uninsulated. The building will be located adjacent to the proposed well head location. The well head will be partially to fully enclosed by either a structural extension of the control building or a separate shed in order to protect the pump and mechanical equipment from the elements. An additional shed-like structure will be installed over the new pressure reduction valve located on the discharge piping in the southeast corner of the Well No. 4 site. The shed will be designed by others.

4) The concept Well No. 6 control building is also a PEMB measuring approximately 18’-0” wide by 17’-6” long by 10’-0” (eave height) and consist of all other features described for the Well No. 4 building in the paragraph above. In addition to a larger overall structure, the Well No. 6 control building will have 2’-0” tall by 0’-6” wide concrete stem walls. The purpose of the stem walls are to insure the building is structurally sound in the event that a flood event greater than the 100-year recurrence interval flood occurs.

5) Additional building features including: PEMB colors, lighting, interior finish, roof overhang, gutters, heaters, external power receptacles, windows, etc., will be confirmed and/or defined in future design efforts.

6) An additional shed-like structure will be installed over the new pressure reduction valve located on the discharge piping in the southeast corner of the Well No. 4 site.

7) Control Buildings will house a new appropriately sized standby diesel generator purchased and installed by the contractor with the appropriate required ventilation, day tank, pump controls, new SCADA controls, magnetic flow meter and electrical panel. The wellhead and pump shall be located just outside of the building and protected from the weather with an awning cover that can be opened or removed to perform maintenance on the pump when needed.

8) Coordinate with the local electrical utility company (NV Energy Electrical Company) to perform all necessary requirements to tie in and bring power to the site.

9) Install water meter and associated appurtenances.

10) New 500 gallon above ground Convault diesel fuel tanks with concrete pad, fuel lines plumbed into the buildings.

11) 6’ high chain link security fence with barbed or constantine wire, one personnel door and one equipment access gate.

12) All-weather Access road improvements shall consist of 12 feet wide graveled road (6” road base material with 3” of ¾” minus surfacing) from the existing access roads to new control building, heavy equipment compacted.

j) Construct Control Buildings

1) Mobilize on to the site.

2) Layout and construct the new control building, tie into the electrical grid system, install new generator and new fuel tank. Install new fencing. Reconnect the existing remote telemetry unit system. Build new road and all the remaining tasks to complete the project. Commission all systems making sure they are fully functional.

k) Demolition of Existing Control Buildings and Site

1) Mobilize on to site.

2) In accordance with all federal, state and local laws properly demolish and dispose of offsite all remaining structures at the existing control building site including the building, concrete slab/foundation, generator, fuel tank, associated buried conduit, piping and fence. Properly disconnect and terminate all utilities.

3) Grade and blend site into the existing contours.

4) Clean up and demobilize from the site.

l) All other tasks necessary to provide a fully functioning production well meeting the operating parameters of the contract shall be considered incidental to the tasks listed above.

3. PLACE/DELIVERY AND PERIOD OF PERFORMANCE: All planning and design work shall be completed where required by the prime contractor and their approved subcontractors. All construction related work is located in or around the Lahontan National Fish Hatchery, in Gardnerville, Nevada. Design work on the project can begin after Notice to Proceed is given. Construction work can begin after the construction documents have been fully reviewed and approved. The Period of Performance is estimated to be no more than 365 calendar days after approved drawings. The system must be fully functional by December 31, 2022.

4. INSPECTION AND ACCEPTANCE: The work shall be done in accordance with the Region 1, 7 and 8 General Design/Build Engineering Requirements, the approved plans & specifications along with the most current edition of the Nevada Revised Statutes (NRS) 534, Nevada Administrative Code (NAC) 534, IBC, IMC, IPC, NEC, NFPA 101, OSHA, SWPPP and any other applicable Federal, State, local or specific environmental permitting requirements. The work shall be accepted when all the work is completed as described here within and in accordance with any contract specifications. Work will be inspected to assure compliance with the contract documents. But quality control and adherence to all contract requirements are still the responsibility of the contractor.

5. GOVERNMENT FURNISHED EQUIPMENT OR MATERIALS/INFORMATION: Any historical inspection reports, design reports and construction related documents that are in the possession of the US Fish and Wildlife Service associated with Well #6 and Lahontan National Fish Hatchery shall be made available upon request.

6. SPECIAL NOTICE: A Pre-Bid Site Visit shall be scheduled to allow perspective bidders an opportunity to view the site and talk to Hatchery Staff. This site visit will introduce potential bidders to the conditions of the project and acquaint them with the unique logistical challenges and requirements of the Lahontan National Fish Hatchery. The site visit is not mandatory but is highly recommended as this will be the only time USFWS contract staff and hatchery personnel will be on-site at the same time to answer questions before the contract is awarded. Actual date and time of the site visit shall be listed in the solicitation documents.

7. AVAILABILITY: Normal duty hours at the hatchery are Monday through Friday 7:00 am to 3:30 pm. Work shall be performed during these hours unless prearranged with the Station Manager. Federal holidays not included. The contractor’s work schedule at the well site may be adjusted (i.e. extended hours up to 24 hours, weekends) to accommodate and meet the optimal time frames for well drilling, well construction , pump testing, development and other associated activities with pre-approval from the hatchery manager.

8. TECHNICAL COORDINATOR/COR: Mark Behrens, Project Manager US Fish & Wildlife Service, R1, Division of Engineering 911 NE 11th Ave Portland, OR 97232 503-231-2209 mark_behrens@fws.gov

9. STATION POINT OF CONTACT: Daniel Boone, Hatchery Manager Lahontan National Fish Hatchery 710 Highway 395 N Gardnerville, NV 89410 775-765-2425 daniel_boone@fws.gov