GVIC_Traveling_Fish_Screen_Questions_and_Answers_-_3_Jan_24_0002.pdf

GVIC Traveling Fish Screens Virtual Site Visit

Solicitation #: 140R4024Q0007

12/14/2023 1 pm

Question 1: Are the design deliverables dues with the bid package or after contract award? (4.0 Task 1

Third paragraph, Deliverables “The contractor shall provide attachment and support details for the traveling screen and powered conveyor system, electrical diagrams/schematics, plumbing diagrams/schematics, equipment specifications (including attachment and support requirements), installation specifications, etc., for inclusion in Reclamation’s future installation contract.)

Answer 1: These Deliverables will be provided within 6 weeks after contract award as described in the next paragraph (Schedule)

Question 2: When is the planned award date?

Answer 2: From the cover page, proposals are due January 11, 2024. It is the governments intention to evaluate proposals and award a contract as soon as possible. This process typically takes 4-8 weeks.

Question 3: Are there a minimum number of bids required for award?

Answer 3: There is no minimum but multiple bids are anticipated.

Question 4: Is the conveyor system belt driven or a chain drag system?

Answer 4: Statement of Work/Specifications paragraph 3.0 OBJECTIVES, third paragraph 6.b. “Chain drag type conveyors are preferable to belt conveyor systems.” Either type of system is acceptable, but the chain drag system will be favored in the proposal evaluations.

Question 5: Can you provide a list of vendors who would supply a chain drag conveyor system?

Answer 5: Reclamation does not have a list of vendors who would supply a drag chain conveyor system.

Below are some pictures of a debris conveyor at a nearby screening facility which has performed well over several decades. A similar type of conveyor which utilizes chains on either side with a drag bar is preferred. The chain type does not need to be exactly as shown in the pictures below.

Figure 1. Conveyor at the 18 Road moss and debris removal structure.

Figure 2. Conveyor at the 18 Road moss and debris removal structure.

Question 6: What is the length of conveyors to be provided?

Answer 6: The flat portion of the conveyor is approximately 190 feet and the inclined portion is approximately 24 feet in length.

Question 7: Is the conveyor system one section or two?

Answer 7: The conceptual design has the conveyor in two sections, one being the flat portion and the other being the inclined section. The conveyor could be one continuous system if the vendor believes that to be the best option.

Question 8: Does each screen have an individual water supply source?

Answer 8: There will be one water supply source that will provide pressurized water to all the screens.

Each screen will have an individual control valve that will turn on the water for that screen.

Question 9: Are the valves controlling the cleaning water for each screen part of the SCADA system to be provided?

Answer 9: No, the control valves will be part of the pressurized water system that will be provided through construction contract.

GVIC Traveling Fish Screens Additional Questions/Answers

Solicitation #: 140R4024Q0007

3 January 2024

Price Schedule Questions:

Question 10: In the Price Schedule spreadsheet, can you please explain further what is meant by

“Traveling Screen Prod. Data and Operation Plan”? We are not sure what costs should be associated with this description.

Answer 10: This is in reference to Task 1 under Section 4.0 TASKS. In summary, all cost associated with providing attachment and support details for the traveling screen and powered conveyor system, electrical diagrams/schematics, plumbing diagrams/schematics, equipment specifications (including attachment and support requirements), and installation specifications should be covered by the pricing provided in that line.

Question 11: For “On-site support of installation“, “System Startup & Troubleshooting” and “Project

Management/Coordination”, are these items meant to be lump sum only or should we include T&M rates? Without limits on the number of hours and number of days onsite, we may not assume the appropriate amount of effort in support.

Answer 11: The bid schedule has these items as a lump sum and bid them as such. From Statement of

Work Task 3 ON-SITE SUPPORT OF INSTALLATION, Deliverables: The contractor shall provide a representative on site as needed during screen installation. Assume 2 weeks of on-site representation will be required. From Task 4 SYSTEM STARTUP & TROUBLESHOOTING, the contractor should assume 1 week of on-site representation for the system startup and troubleshooting process. The “troubleshooting support may be through the summer of 2025” will vary by contractor and should be based upon the contractor’s historical installation experiences. From task 5, “There shall be monthly meetings between the contractor and Reclamation. Additional meetings will be scheduled as needed.”

Powered Conveyor Questions:

Question 12: Under the “3.0 Objectives section”, it states that “Chain drag type conveyors are preferable to belt conveyor systems.” We have not supplied a chain drag conveyor in the past and are not familiar with the vendors who supply them. Can any information be shared on possible vendors for this conveyor? Has a chain drag vendor vetted this opportunity per the latest design to review for design concerns and make recommendations on the design? Has a chain drag conveyor vendor determined what the horsepower will be on a system this size?

Answer 12: Reclamation does not have a list of vendors who would supply a drag chain conveyor system.

Reclamation has not presented the conceptual design to any drag chain vendors and has no input from any of them. Below are some pictures of a debris conveyor at a nearby screening facility which has performed well over several decades. A similar type of conveyor which utilizes chains on either side with a drag bar is preferred.

Figure 1. Conveyor at the 18 Road moss and debris removal structure.

Figure 2. Conveyor at the 18 Road moss and debris removal structure.

Question 13: What is the length of conveyors to be provided?

Answer 13: The flat portion of the conveyor is approximately 190 feet and the inclined portion is approximately 24 feet in length.

Question 14: Is the conveyor system one section or two?

Answer 14: The conceptual design has the conveyor in two sections, one being the flat portion and the other being the inclined section. The conveyor could be one continuous system if the contractor believes that to be the best option.

Question 15: Does each screen have an individual water supply source?

Answer 15: There will be one water supply source that will provide pressurized water to all the screens.

Each screen will have an individual control valve that will turn on the water for that screen.

Traveling Screens Questions:

Question 16: Should mechanical Overload Protection of the Traveling Screens be included?

Answer 16: This is at the discretion of the Traveling Screen designer. Reclamation envisions the screens having, at a minimum, the ability to monitor overtemperature/over current conditions and to report these conditions to the CCS. If the Traveling Screen goes into a fault mod/shuts down or is taken out of

“automatic mode”, this condition should also be relayed to the CCS so that the CCS can sequence through the other active screens.

Traveling Screens Controls Questions:

Question 17: Are there any interdependencies between the 16 screens or can each screen be controlled independently? Any interdependencies between the 16 screens and the conveyor system?

Answer 17: All components should operate independently.

Question 18: Will the control panels be installed in a climate-controlled environment? If not, would you like to incorporate heaters and air conditioning units in the panels?

Answer 18: The control panels will not be located in a climate-controlled environment. Contractors should include heating and ventilation, if needed, in their proposals. Similar installations throughout the canal system do not use air conditioning units.

Question 19: Are there any size limitations for each control panel?

Answer 19: Yes, it is Reclamation’s desire that each screen’s components and control panels be located within the existing individual screen bays. The control panel must not extend into the plane of the adjacent screens.

Question 20: Should all the screens and conveyor be controlled by one PLC? Or should these devices be split into multiple PLCs in order to reduce the impact of a single PLC failure.

Answer 20: This is at the discretion of the supplier, as long as all solicitation requirements are met.

Question 21: Do you want relay or PLC control? If PLC, are Allen Bradley CompactLogix PLCs acceptable?

Answer 21: PLC control. Either PLC manufacture is acceptable.

Question 22: What is the control scheme for the water screens? Manual Controls where an operator would start/stop the screens? Or Automatic Controls based on River Levels or some instrumentation? Or the ability to have both Manual and Automatic controls?

Answer 22: Both manual and Automatic control (see question 9). Auto mod would be the normal condition of operation and the screens would be controlled by the Cleaning Control System CCS. The conveyor(s) would also be controlled by the CCS and will run while the screens are being cleaned and for a period of time to allow the conveyor to empty. Manual mode will be used for maintenance and emergency operation.

The CCS will not be monitoring system water levels, that task is handled by the “Master SCADA” system

(not part of this solicitation). The Master SCADA system will be monitoring water levels throughout the system and will provide an “enable” signal to the CCS when it detects the increased head differential due to clogged screens. See solicitation (Screen operation requirements)

Question 23: What is the control scheme for the conveyor system? Manual Controls where an operator would start/stop the conveyor? Or Automatic Controls based on if any water screen is active? Or the ability to have both Manual and Automatic controls?

Answer 23: Both manual (see answer to question 9) and Automatic control, signal provided by the

Cleaning Control System CCS.

Question 24: Do you want to control the screens and conveyor with VFD (Variable Speed) or Motor

Starter (Fixed Speed) Controls?

Answer 24: Screen controls can be fixed speed. Conveyor should be variable.

Question 25: Any Local controls near each screen/conveyor? Such as a HOA (Hand-Off-Auto) switch, Forward/Reverse switch, Start Pushbutton, Stop Pushbutton, or ESD pushbutton.

Answer 25: Each screen should have HOA, Forward/Reverse and Start Stop buttons. Conveyors should have the same controls and the ability to adjust speed. All these controls can be located inside the control panels on the individual screens (they can be accessed by opening the control box cover) If more economical, these features can be incorporated into a local HMI (see SCADA System Questions 2).

Question 26: Does each water screen and conveyor have a single motor/gearbox? What size motor (HP) will be required on the screens and conveyor system?

Answer 26: Each traveling screen will have its own motor/gearbox. The motor for the screen should be sized based on manufactures experience and knowledge. Reclamation’s conceptual screen design shows the horizontal conveyor as a separate unit from the stacking conveyor, this layout would require two conveyor motor/gearboxes. If the supplier wants to use a single motor/gearbox to power a single

(combined) horizontal and stacker conveyor this is acceptable. Power requirements for the conveyor must be identified by the manufacture.

Question 27: What is the available voltage at the site? I see there is 480VAC with a 400 AMP service, but do we need to provide a transformer from 480VAC to 120 VAC power for the PLC Control Panel?

Answer 27: There will be 480VAC and 120VAC available at each traveling screen. No transformers will be needed. Construction/Installation contract to follow will provide power to each screen based on the screen manufacturer’s requirements.

Question 28: Any additional instrumentation required? Such as level transmitters, pressure transmitters, or flow transmitters. If so, please provide quantities.

Answer 28: No. These items will be a part of the “Master SCADA” system and will not be included in this procurement.

Cleaning Control System (CCS) Questions:

Question 29: Can the Cleaning Control System (CCS) be programmed within each of the screen PLCs?

Or is the expectation for the CCS to have its own PLC?

Answer 29: This is at the discretion of the supplier. If all capabilities described in the solicitation and addendums attributed to the CCS can be controlled by screen PLC(s) this is acceptable.

Question 30: The specification states that “CCS will have the ability to determine if a screen/s are disabled and adjust the sequencing operations to bypass the disabled screen/s without interruption or delay of cleaning operations for the functional screens.” What conditions would need to be true for a screen to be considered disabled, so the cleaning operations are bypassed? Would this simply be a button in the SCADA system for an operator to disable the screen? Or is there additional criteria for a screen to be considered disabled?

Answer 30: The screen would be considered disabled if it cannot be controlled by the CCS. Examples would be 1 it was placed in Hand mode and not under the control of the CCS, 2 it has lost power, 3 it is in an alarm state that prevents it from running (motor fault/over temp) etc.

Question 31: The specification states that “CCS will provide status and discrete alarms (each alarm will identify what it represents) information to the Master SCADA system.” Do we have a list of which alarms and statuses are required?

Answer 31: This should be considered a partial list with no more than a total of eight alarms. 1.

Conveyor fault 2. Screen Operation Degraded (1-2 screens in disabled condition) 3. Screen operation

Critical (3+ screens in disabled condition)

Question 32: Do we need to control any additional pumps or valves? If so, how many pumps and valves will we need to control? Also, will all motor starters and breakers be supplied by others?

Answer 32: Pumps will be controlled by the “Master SCADA” system and are not part of this solicitation. Each set of screens will need to activate a wash water solenoid during its cleaning cycle. The solenoid will be provided by the installation/construction contract.

Question 33: Can you provide more information on how we should “Monitor wash water spray bar operation to match the screens”?

Answer 33: This should say “Control wash water spray bar operation to match screens.” As described in the previous question the wash water for the spray bar in each screen needs to be activated during its cleaning cycle.

SCADA System Questions

Question 34: I seen a note stating that “The Cleaning Control System (CCS) will receive an “enable” signal from a separate “Master SCADA” system to be installed by another contract.” Does that mean that the SCADA system is not part of this contract? Will this system need to be incorporated into an existing

SCADA or DCS system? Do you need us to provide a SCADA system or an Edge SCADA system?

Answer 34: The only requirement for this solicitation is the CCS. The Master SCADA system (not part of this solicitation) will be monitoring water levels, controlling gates, enabling the CCS, and pressure washing pumps. The CCS will have control of the traveling screens, conveyor system and the wash water control valves. The Master SCADA system will also be providing flow data and notifications of system alarms/failures to the water users.

Question 35: Are any LOCAL HMIs required for this system?

Answer 35: No. Unless the proposer determines it would be more economical to use a local HMI to accomplish the manual control discussed in Traveling Screen Control 9 (HOA, Forward/Reverse, Start, Stop).

Question 36: What is the protocol that the PLC will communicate with to the Master SCADA System?

Answer 36: The Master SCADA system will be part of a follow on contract, there is no existing protocol to match. Other similar installations use Modbus or Profinet, the proposal should anticipate using one of these to be determined after award.

Question 37: How are we communicating to the Master SCADA system? Hardwired, Radio, Cellular? Is this to be included in the proposal?

Answer 37: Hardwired or Radio. The contractor’s proposal should include all devices that will be connected to the CCS.

Question 38: Will the SCADA system be a cloud-based system or an on prem system?

Answer 38: The Master SCADA system is not part of this solicitation.

Question 39: If cloud-based, who would procure the infrastructure, and if on prem, who would procure the hardware?

Answer 39: The Master SCADA system is not part of this solicitation.

Question 40: If on-prem, do we have a climate-controlled area where the SCADA System would reside?

Answer 40: The Master SCADA system is not part of this solicitation.

Question 41: Is an Ignition SCADA System acceptable?

Answer 41: The Master SCADA system is not part of this solicitation.

Question 42: What features do you want the SCADA system to have? Reporting? Historical Data?

Answer 42: The proposal should include only the features associated CCS discussed above and identified in the solicitation.

Question 43: Will the SCADA system need Alarm notifications? If so what type? Email, Voice, SMS

Text?

Answer 43: The Master SCADA system is not part of this solicitation, and it will accomplish system alarm notifications to the water users. The contractor’s proposal must include only the alarm notifications from the CCS to the Master SCADA system identified in the previous questions.

Question 44: Is the SCADA system only for remote monitoring or for remote control as well?

Answer 44: The Master SCADA system is not part of this solicitation.

Question 45: How many graphical displays are required for the SCADA system? For example, we could create 16 Water Screen Displays, 1 Conveyor Screen Display, an Overview Display, and an Alarm

Display. Any additional Displays needed?

Answer 45: The Master SCADA system is not part of this solicitation. Proposal should include 1 display to show the status of the 16 screens and any active alarms associated with them. This display will be located in the cabinet that houses the Master SCADA system.

On-site representation during installation:

Question 46: RFP states “2 weeks of on-site representation will be assumed”. Is this 2 weeks for traveling screen mechanical representation and an additional 2 weeks for controls and SCADA representation? Would any additional time be charged at T&M rates as needed?

Answer 46: Task 3 identifies two weeks of on-site representation for installation support. It is likely that one week will require mechanical representation and one week will require SCADA representation. If additional time is required it will need to be negotiated between the awarded contractor and the

Contracting Officer.

Question 47: RFP states “Troubleshooting support may be through the summer of 2025”. Would this support be charged at T&M rates as needed?

Answer 47: Task 4 covers system startup and troubleshooting. The contractor should assume 1 week of on-site representation for the system startup and troubleshooting. The “troubleshooting support may be through the summer of 2025” will vary by contractor and should be based upon the contractor’s historical installation experiences. This task will be represented as a lump sum as identified in the bid schedule.