PWS - Nimbus Powerplant Underwater Debris Removal Services - DRAFT _1.doc

PERFORMANCE WORK STATEMENT (PWS)

Nimbus Powerplant Underwater Debris Removal Services

1.0 BACKGROUND

Nimbus Powerplant is located at the northern end of Nimbus Dam with the Sacramento State Aquatic Center located on the south side of Nimbus Dam from Hazel avenue. The two power generating units at Nimbus Powerplant have been adversely affected that past 4 years due to an accumulation of wood debris in and around the intakes to the power units. The power unit intakes are protected by trashracks that prevent significant debris from entering the turbines. However, the trashracks/screens are easily clogged because of debris which has accumulated and subject to being pulled up against the trash rack. This has resulted in shutting down the power units on many occasions due to inadequate flows and has resulted in a significant loss of revenue. While Reclamation has utilized our forces to remove debris from the trashracks, our portable crane cannot reach areas of debris accumulation subject to being pulled up against the trashracks. Additionally, a 2018 dive report documents wood debris that has accumulated and is stuck in the trashracks that we’ve been unable to clear.

Please see the following aerial link:

http://maps.google.com/maps?f=q&hl=en&q=95670&ie=UTF8&om=1&z=17&ll=38.635855,-121.222039&spn=0.005741,0.013561&t=h&iwloc=addr

1.1 Definitions

CO

Contracting Officer

COR

Contracting Officers Representative

OGR

Onsite Government Representative

PWS

Performance Work Statement

2.0 SCOPE OF WORK

Provide commercial dive services at Nimbus Powerplant unit trashracks and enclosed apron area and remove and dispose of debris. The primary underwater scope is removal of submerged debris at the trashracks and at the 100’ square apron area enclosed by a wall. Once this primary scope is completed, other surrounding areas may be considered for debris removal as coordinated by the COR and Contractor. Remove and dispose of debris up against and within the existing buoy line. Dive and debris removal is limited to in around the upstream side of Nimbus Powerplant and existing buoy line.

The Prime Contractor shall be a commercial dive contractor and provide the services stated herein. In addition to the debris removal, an ½” pipe that facilitates measurement of the forebay elevation may be clogged. The dive team shall investigate and clear any obstructions as applicable and feasible. Location of the ½” pipe is at elevation 98’ and just north of the Unit 1 trashrack. See attached drawings and/or consult with COR as necessary. The Contractor shall provide underwater videos before and after debris is removed at the trash racks and enclosed apron area. The video shall also include any significant findings such as built-up debris on or near the exterior of the underwater wall, or as the apron slopes up to the north side of powerplant. Also, note and record any obvious damage such as to the trash racks. The enclosed and flat apron area in front of the trash racks is approximately 100’ square with an underwater wall at an elevation of 105’ as shown on drawing 485-D-397.

The dive master or designated Contractor Representative shall communicate any significant findings to the COR during the dive as feasible. All debris shall be disposed of offsite. Reclamation shall be responsible for outages of the power units and any spill gates in the vicinity to ensure the safety of the dive team.

The Contractor shall be expected to conduct underwater operations to a depth of approximately 50 feet of fresh water (based on Reclamation maintaining a surface elevation (msl) between 121 -125’ and a concrete apron located at an elevation of 79’ as depicted on drawing 485-D-397. The Commercial Dive Contractor shall be prepared for extended dive durations, but not outside the no-decompression limits using approved commercial diving practices, procedures, equipment, and trained and experience diver personnel who shall have completed a recognized course in commercial diving. Temperature of the water at the surface is expected to be 45 - 650F depending on the time of year. Contractor shall furnish all labor, supervision, equipment, boats, parts, materials, and incidentals necessary (except as noted in the Government-Furnished Property and Responsibilities section of this PWS) in performing the work described above and elsewhere in this PWS.

An excerpt from the attached “2018 Nimbus Dive Report” follows:

There are two units on the powerplant. The intakes, located on the right side of the dam, are each covered with trashrack structures, 16 feet high and 41 feet wide. Large amounts of woody debris are present on both intake trashracks. This woody debris typically consists of 3 to 12-inch diameter logs and branches, with a layer of up to 3 feet thick resting against the trashrack bars. On Unit 2, the upper 9 feet of the rack is clear on the left side, decreasing to the upper 3 feet clear on the right side. This results in only 37 percent of the rack being clear of debris. On Unit 1, the bottom half of the rack is completely covered with woody debris. The left half of the upper part of the rack is approximately 20 percent covered, and the right half of the upper rack is nearly 100 percent clear. This results in approximately 45 percent of the rack being clear of debris. The concrete floor upstream of the powerplant intakes is nearly completely clear of debris. The concrete is in good condition, with less than 1/4 inch of relief throughout. There is a deflector wall in the area upstream of the intakes that is also in good condition. No damage was noted to the wall. Three concrete anchors for the missing surface buoys were located on the upstream side of the wall. Cables or chains long enough to attach to a surface buoy were not found on the anchors.

Also see report for photos 22- 24 showing trashracks and debris. A large portion of this report should be ignored as most of the report does not pertain. A maximum of five days is expected on site and considerable improvement is expected if all debris cannot be removed within this time frame. Should the onsite work take less than 5 days, the Contractor shall invoice for only the actual time on site.

Access to the site is available from Sacramento State Aquatic Center and through a gate via access on the American River Bike Trail on the north side of Nimbus Powerplant. Adjacent to Nimbus Powerplant is an area where the contractor can deploy their boat and dive team, or from the Aquatic Center as determined practicable.

3.0 Tasks and Deliverables

Contractor shall furnish all labor, supervision, equipment, boats, parts, materials, and incidentals necessary (except as noted in the Government-Furnished Property and Responsibilities section of this PWS) in performing the work described in this PWS and as approved by submittals. The items/deliverables that follow are effectively submittal/technical requirements to be provided by/complied with by the Contractor. Items 3.1 – 3.4 below (Pre-Dive Submittals) will require approval prior to any work starting on site. As such, the local office shall issue a Permit to Work that effectively affirms all key requirements and submittals are approved and work can begin. Submittals can be accomplished via email submission, and items 3.1 – 3.4 shall be submitted no later than 21 days following contract award. Obtain Approval/Acceptance of all pre-dive submittals to facilitate completion of the dive work within 35 calendar days following contract award.

3.1 Dive Master and Diver Qualification Statement/Certification and Experience

Contractor shall submit a list of personnel that will perform as Dive Master, Diver, Standby Diver and Tender. The Contractor shall provide a signed statement/certification addressing the qualification requirements and standards for each individual as outlined in Section 11.0 of this PWS. In addition, a separate signed statement shall be provided to include experience of Contractor and diving team in meeting all local, state and federal regulations, as applicable to the area of jurisdiction - i.e., RSHS, 29 CFR and ADCI.

3.2 Safety Program, Plan and JHAs

Contractor shall follow Reclamation Safety and Health Standards (RSHS), October 2009 while conducting all work on Reclamation property. The Contractor shall submit a written safety program, plan and JHAs as outlined in Section 3 and 4 of the RSHS for review and acceptance by Reclamation. Also, see requirements in Section 9.0. The Contractor shall anticipate the day to day work per the schedule/itinerary and provide JHAs for each day/activity accordingly. No work will proceed until the safety program, plan and JHAs are accepted. The DPHA requirement that follows may be a subset of the Contractor’s safety program/plan.

3.3 Dive Plan and Hazard Analysis (DPHA)

Contractor shall follow RSHS (latest version) while conducting dives on Reclamation property. The Contractor shall submit a written DPHA consistent with Section 29 of RSHS and the requirements indicated below for review and acceptance by Reclamation. No work will proceed until the DPHA is accepted by Reclamation and before Contractor mobilizes to dive site.

All personnel involved must review the dive plan and hazard analysis before suiting up. As a minimum, the plan must contain the following:

1) Names and duties of dive team members, including dive master.

2) Date, time, and location of the dive operation.

3) Diving mode to be used (scuba, surface-supplied air, etc.), including a description of the backup air supply.

4) Description of two or four-wire continuous communication system. Description and/or plan to communicate with submerged diver(s).

5) A description of the work divers will perform.

6) Surface and underwater conditions, including visibility, temperature, thermal protection, and currents.

7) Activity hazard analysis for each phase of work, including the hazards of flying after diving.

8) Maximum depth and bottom time (make altitude adjustments to dive tables for dives at altitudes of 1000 feet or more above sea level).

9) Provide info/detail on dives and/or diving operations outside of no-decompression limits.

10) Emergency management plan, including emergency procedures, means of notification, telephone numbers (for ambulance, doctors, and Divers Alert Network), locations of evacuation route, and emergency assistance.

11) Lockout/tagout procedures, including how to deal with differential water pressures due to unequal water elevations.

12) Equipment servicing records, procedures, and checklists and requirements for special tools and equipment.

13) Statement that semi-Annual air quality samples have been taken on breathing air systems intended for use on the job.

14) Statement that annual inspection of diving umbilicals have been completed and each diving umbilical is marked in ten-foot increments as per regulations

15) All gauges have been calibrated within the last six months

16) Diver helmets have been maintained and inspected in accordance with manufacturers’ recommended procedures and a record of same available either from the diving company or the Divers Log book.

17) Certification that each dive team member has a current diving physical report on file in the company offices.

18) Describe any major equipment that will be utilized, how it will be used and brought on site. E.G.: Describe boat and where it will be deployed from. Provide portable crane size, set up location, and method of retrieving debris such as a basket attached to the crane. Provide certification training of all crane operators.

19) Statement that the Dive Master, Diver(s), Standby Diver and Tender(s) and other team members involved will participate in a joint Pre-Dive Briefing/JHA with Reclamation prior to the dive/activity each day.

Provide a brief explanation and/or indicate N/A for those items that do not apply to the proposed dive. Any changes to the DPHA after acceptance by Reclamation but prior to the dive shall be coordinated with Reclamation for concurrence.

3.4 Schedule of Work

Contractor shall provide Reclamation with an iteniary and schedule of the planned dive from mobilization to final dive, departure from the site and the post dive submittal requirements. Outline planned activites for each day on site regarding the debris removal and video recording activities.

3.5 Dive Report

The Contractor shall submit a written dive report to Reclamation summarizing the dive and tasks performed and underwater video(s) within 14 calendar days following the dive. The intent of the video is to document the existing conditions and areas cleared of debris (before and after conditions). Any findings/discoveries and recommendations as described in the scope shall be documented in the report. Also, include findings regarding the ½” pipe that facilitates measurement of the forebay elevation that may be clogged.

4.0 Period of Performance

The entire project shall be completed within 50 days after receipt of the purchase order.

5.0 Recognized Holidays

New Year’s Day

Labor Day

Martin Luther King Jr.’s Birthday

Columbus Day

President’s Day

Veteran’s Day

Memorial Day

Thanksgiving Day

Independence Day

Christmas Day

The Bureau of Reclamation observes all federally recognized holidays and the facility is not open for normal operation on those days. No work shall occur during Federal holidays unless there are emergency repairs that have been authorized by the CO.

6.0 Hours of Operations

Normal business hours are Mon – Fri, 7:00am to 5:00pm except Federal holidays. The contractor is responsible for performing work as defined in this PWS during normal business hours except when the Government facility is closed due to local or national emergencies, administrative closings, or similar Government directed facility closings. The commercial dive work is expected to take no more than five business days, Mon – Fri.

7.0 Security

The contract solicitation may delineate any applicable specific Contractor security requirements. As such, Contractor personnel performing work under this contract shall meet the security requirements at the time of award, and must maintain the level of security required for the life of the contract. However, the period of performance for this contract will not require the badging requirements of a lengthier contract. As such, the COR or Government represntative will provide escorts to contractor personnel for the duration of this contract. The Contractor shall coordinate access for personnel, materials, and equipment with the Government prior to mobilization on site. The Contractor shall submit the names, company names, position, and dates and times each individual is expected on site at least five business days prior to any work conducted on site.

8.0 CLEAN-UP AND DISPOSAL

The Contractor shall keep the work site and staging area free from accumulation of waste material and rubbish during the contract. The work site shall be cleaned daily. Before final acceptance of the work by the Government, the Contractor shall remove from Government land, all rubbish/debris resulting from this work and deposit it in a State-approved sanitary landfill. Any damage to Reclamation facilities shall be repaired by the Contractor at no cost to the Government.

9.0 SITE SAFETY AND JOB HAZARD ANALYSES (JHAs)

Reclamation has overall responsibility for safety and security of the site and facilities under their purview. Generators will not be operating during diving operations and any spill gates in the vicinity will be locked out as well. As such, Reclamation will perform a joint Pre-Dive Briefing/Job Hazard Analysis (JHA) with the Contractor prior to the scheduled dive. The Pre-Dive Briefing/JHA will include clearance and lockout procedures and a site visit to ensure the safety of all personnel, security and logistics for the day’s dive operation. The daily Pre-dive briefing/JHA will include a discussion regarding the work activities for the day and the associated hazards.

The Contractor shall always be responsible to ensure safety on site in compliance with OSHA and Reclamation Safety and Health Standards (RSHS) whichever is more stringent. (http://www.usbr.gov/ssle/safety/RSHS/rshs.html) At a minimum, a Job Hazardous Analysis (JHA) shall be written and discussed with all parties present prior to any work beginning on site. See Sections 3 and 4 of the RSHS for specific requirements. Each participant shall sign the JHA, and the COR shall make and distribute copies.

Work within and adjacent external features associated with Folsom and Nimbus Dams and Powerplants: These facilities are subject to Facility Instruction Standards and Techniques 1-1, (FIST 1-1), Hazardous Energy Control Program (HECP), (https://www.usbr.gov/power/data/fist_pub.html). Effectively, FIST 1-1 outlines the safety and lockout – tag out procedures associated with any hazardous energy as a result of a repair action in the above facilities. Administratively, a Special Work Permit under HECP must be issued before any work can proceed under a clearance within Folsom Power Plant for example. The Special Work Permit is equivalent to a Notice to Proceed under a clearance and the COR will provide all coordination and issue the Special Work Permit to the contractor. See above link for more information.

10.0 GOVERNMENT-FURNISHED PROPERTY AND UTILITIES

Use of the Government’s existing gantry crane is not allowed, has very limited reach upstream and is otherwise not suitable for debris removal operations. The Contractor shall provide any portable cranes, rigging materials and qualified operators. Provide crane operator certification credentials upon request and prior to mobilization.

Reclamation does not anticipate providing any Government Furnished Equipment (GFE). The Contractor shall furnish all labor, supervision, equipment, boats, parts, materials, and incidentals necessary to perform the work.

The Contractor should assume that restroom facilities, electric power and water are not available at the site. Parking, storage of materials, equipment and related logistics can be discussed with the COR prior to mobilization or via a pre-dive site visit as necessary.

11.0 Applicable Publications and Standards

A. Underwater work and marine operations shall be conducted in accordance with all local, state and federal regulations, as applicable to the area of jurisdiction. If standards or codes conflict, the contractor shall comply with the more stringent of the standards or codes.

B. Reclamation Safety and Health Standards (RSHS), (latest version): http://www.usbr.gov/ssle/safety/RSHS/rshs.html C. FIST 1-1, Hazardous Energy Control Program (HECP), https://www.usbr.gov/power/data/fist_pub.html D. 29 Code of Federal Regulations (CFR), Parts 1910.401 – 1910.440, Subpart T, “Commercial Diving Operations”

E. Association of Diving Contractors International (ADCI) Consensus Standards for Commercial Diving and Underwater Operations (6.2 or latest Edition)

Diver Qualification and Dive Master Qualification: Each diver shall have completed a formal course of instruction at a public or private (including military) commercial diving school and shall be certified by entities recognized by the Association of Diving Contractor’s International (ADCI) to the appropriate level recognized by ADCI for the intended dive and task to be performed. Dive Master shall have a minimum of five (5) years of documented on-the-job experience in the profession of commercial diving and consistent with the work specified herein.

Divers must be at least 18 years old and be fully familiar with the equipment, diving system, and emergency procedures to be used. Divers must have undergone a medical examination within the past year that certifies them as physically fit for diving. Divers must be in good health and otherwise not have any adverse condition or affliction inconsistent with commercial diving practices/requirements during diving operations.

11.1 Dive Team

In no circumstances shall diving operations be conducted with less than a four-person diving team (comprised of a Dive Master, a Diver, a Standby Diver and a Tender), nor shall any member of a diving team remain at the dive station for a period longer than twelve hours per day. Expected on-site operational times for the proposed work is from 7:00am to 5:00pm each day.

Diving operations must be supervised as required by the appropriate governing regulation. The designated person-in-charge/Dive Master shall be appointed in writing as that individual who oversees the planning and execution of the diving operation including the responsibility for the safety and health of the dive team. With consideration of applicable Section 9.0 requirements, he or she shall ensure that before commencing any diving operation that the dive team members are briefed on:

· The tasks to be undertaken.

· Any unusual hazards or environmental condition likely to affect the safety of the diving operation.

· Any notifications to operating procedures necessitated by the specific diving operation.

12.0 ATTACHMENTS

All drawings/attachments are for reference only. Contractor to perform field verifications as may be necessary.

a. 2018 Nimbus Dive Report

b. Nimbus Historical Construction photos

c. Reference Drawings

1) 485-D-318 - Nimbus Powerplant Structural Arrangement Plans

2) 485-D-319 - Nimbus Powerplant Structural Arrangement Sections

3) 485-D-344 - Nimbus Powerplant General Arrangement, Elevation 107

4) 485-D-345 - Nimbus Powerplant Deck Arrangement, Elevation 132

5) 485-D-346 - Nimbus Powerplant General Arrangement, Transverse Sections

6) 485-D-393 - Nimbus Dam and Powerplant General Plans and Sections

7) 485-D-397 - Nimbus Dam and Powerplant Upstream Apron Plans and Sections

8) 485-D-398 - Nimbus Dam and Powerplant Upstream Apron Section and Details

9) 485-D-711 - Nimbus Powerplant Trashracks

10) 485-D-736 - Nimbus Powerplant Piping Details, Forebay Stilling Well

11) 485-D-1669 - Nimbus Powerplant Forebay Stilling Well Transmitter Installation

13.0 Quality Assurance Surveilance Plan

The Quality Assurance Surveillance Plan is one evaluation method the government uses to surveillance performance to determine whether the Contractor meets the standards of performance as defined in the PWS. The absence of a QASP for any contract requirement, however, shall not detract from its enforceability or limit the rights or remedies of the government under any other provision of the contract in determining the quality of the Contractor performance.

QUALITY ASSURANCE SURVEILLANCE PLAN (QASP)/ PERFORMANCE REQUIREMENTS SUMMARY (PRS)

Section 9.0 of PWS:

Site Safety

Sections 3.1, 3.2, 3.3 and 3.4 of PWS:

Pre-Dive Submittals Development and Approval/Acceptance of Pre-Dive Submittals

Section 3.5 of PWS:

Post Dive Report and Video(s) Development and Approval/Acceptance of Post Dive Report

Submittal Submit acceptable post-dive report submittal including videos within 14 calendar days following dive completion. Reclamation

COR Review, Coordination of Comments, Surveillance and Approval/Acceptance (100%)

End of PWS

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