26070-Addendum 01 - 04.28.2026.pdf
PDF 2 MB Posted
- Attached to
- Tuluksak Power Plant Upgrade Project (ITB)
- Solicitation number
- 26070
- Issued by
- Dillingham Census Area, Alaska
About this file
This Addendum No. 1 to Invitation to Bid (ITB) 26070 for the Tuluksak Power Plant Upgrade Project, issued by the State of Alaska on April 28, 2026, provides clarifications, modifications, and responses to bidder questions regarding the complete renovation of an existing diesel power plant in Tuluksak, Alaska. The addendum confirms that sealed and emailed bids will be accepted, with submissions addressed to Selwin C. Ray at AEAProcurement@akenergyauthority.org. Key project clarifications include: correction of specification section headers (26 32 13 for Engine Generators on pages 355-371); replacement of the existing 5-inch exhaust thimble with a new 6-inch triple-wall insulated thimble; confirmation that existing exhaust and crank vent systems on Generator #2 remain unchanged while new systems apply only to Generator #3; confirmation that flashing is not required at the canopy-to-wall interface; and specification of new Basler DECS-100 voltage regulators in owner-furnished engine junction boxes that require adjustment during commissioning. The addendum modifies the scope of work regarding the emergency generator (E-Gen), clarifying that the contractor is responsible for connecting the 200kW E-Gen to the grid while the utility will operate and maintain it, with contractor obligations including work scheduling to limit E-Gen operation to no more than four months, advance schedule submission for approval, provision of connection materials per specifications, and coordination of grid cutover with a maximum outage duration of eight hours.
The temporary 200kW emergency generator, currently located at the AEA Shop in Anchorage, is a Blue Star JD250-02 diesel unit with a John Deere 6090HF484 engine rated at 200kW, 480 volts, 300 amps, and three-phase power. Service records dated June 3, 2025, document 14 hours of cumulative runtime, an annual service completion, a two-hour load bank test, and full operational inspection, with specifications indicating a 7-gallon oil capacity and maximum allowable cumulative runtime of 3,000 hours. The generator is equipped with a Shark 200 meter and 400:5 current transformers, with the automatic voltage regulator setpoint adjusted from 460VAC to 480VAC and noted as requiring potential field adjustment after startup. Installation notes specify a 3/4-inch by 10-foot copper-clad ground rod adjacent to the generator and four minimum 300-amp-rated conductors routed in temporary raceway from the 480V bus bars to the step-up transformer secondary. The addendum addresses housing availability, clarifying that bidders are responsible for securing their own accommodations, and provides the Tuluksak Native Community contact (Kristi Napoka, 907-695-6420) for inquiries regarding equipment and vehicle rentals. Additional supporting attachments include installation details for the 6-inch thimble, the complete generator service report, temporary grid connection specifications with installation notes and site photographs, and representative photos of the existing Generators #1 and #2.
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Page 1 of 4 Printed on 4/28/2026
Date: April 28, 2026 Project: Tuluksak Power Plant Upgrade Project Solicitation No.: ITB 26070 Addendum No.: 1
TO ALL PLAN HOLDERS:
The following changes, additions, clarifications, and/or deletions are hereby made part of the ITB Documents for the above noted project, as if fully contained therein. All other terms, conditions, and specifications of the original Invitation to Bid remain unchanged.
Bidders must acknowledge receipt of this Addendum by email prior to the bid due date and time.
The ITB Package is hereby clarified, changed or modified by the following:
CONTRACT PROVISIONS AND SPECIFICATIONS
Bid Submission: In addition to sealed bids, emailed bids will be accepted. Emailed bids, amendments, or withdrawals must be received in the email inbox prior to the scheduled time of bid opening, addressed to: Selwin C. Ray, Email:
AEAProcurement@akenergyauthority.org
This Addendum is issued to provide responses to questions received for the referenced solicitation. The questions and answers are included herein, and additional supporting documents are provided as Attachments A through D.
Page 2 of 4 Printed on 4/28/2026
QUESTIONS AND ANSWERS:
1. Question: While reviewing the project manual for ITB 26070 (Tuluksak Power Plant
Upgrade Project), I noticed a few typographical errors in the specification headers and footers that require clarification: PDF Pages 291–328: The header and footer identify the section as “26 23 02 Upgrade Existing Prime Power Switchgear.” PDF Pages 355– 371: The header shows “26 23 02 Engine Generators,” while the footer shows “26 32 13.” Could you please confirm that the headers on pages 355–371 should be corrected to read “26 32 13 Engine Generators” for consistency?
Answer: On pages 355–371 the footer is correct. The header should read 26 32 13.
2. Question: Specific note 2 on sheet M2.1 calls for the existing 5” exhaust thimble at position #4 to remain. Sheet M6 refers to an existing 6” thimble. Does the existing 5” thimble need to be replaced with a new 6”?
Answer: The existing thimble is 5” and it needs to be replaced with a new 6” thimble.
Demolish existing 5” thimble and provide a new 6” triple wall insulated wall thimble listed for zero clearance to combustibles, Harco WT or approved equal. Provide framing and flashing as required. See Attachment A for installation details.
3. Question: Drawing M2.1 shows Gen#1 & #2 to remain and does not mention the removal of the crank vent or exhaust on Gen#2, which M3.2 detail 5 has an arrow pointing to Gen#2 thimble and has “New 1-1/4” Crank vent & 5” exhaust, TYP (2)”. Fairly certain that Gen#2 exhaust and crank vent are to remain, can you confirm this?
Answer: The plan view drawings M2.1 and M3.1 are correct. The 5” exhaust and 1- 1/4” crank vent on Gen#2 are existing. The note calling for new 5” exhaust and 1-1/4”:
crank vent only applies to Gen#3.
4. Question: Detail 4/M3.3 Radiator/Canopy Support Section indicated attachment of the canopy roof system to the exterior wall; however, no flashing or weather protection is shown at the roof to wall interface. Is flashing required at the location?
Answer: Flashing is not required. The canopy is primarily for snow and does not need to be rain proof.
5. Question: The existing voltage regulators are located in the generator termination box, are there new regulators in the new control boxes? Will they need to be set up with the generators?
Answer: The Owner furnished engine junction boxes include new Basler DECS-100 voltage regulators as shown on Sheet E6.5. The regulators have been set up with typical values for a similar small community, but they will need to be adjusted as part of the commissioning process.
6. Question: What are the hours on the emergency generator?
Answer: The engine presently has a total run time of 14 hours. The engine was serviced and load tested in June of 2025 prior to shipping out. See Attachment B for service report.
7. Question: Is there a limit of time that we can run the emergency generator?
Answer: The maximum cumulative run time allowed on the emergency generator (EGen) is 3,000 hours.
8. Question: Will the generator be able to hold the village load during winter time?
Page 3 of 4 Printed on 4/28/2026
Answer: The E-Gen has a minimum 200kW prime capacity which is adequate for the expected loads during the winter of 2026/2027.
9. Question: What is the hour run time between oil changes? What is est. capacity of oil?
Answer: The scope of work is clarified to make the Contractor responsible for connecting the E-Gen to the grid and to make the utility responsible for operating the EGen. Note 3 on Sheet M1.4 and Note 3 on Sheet E1.2 are hereby replaced with the following Note 3:
THE EXTENT OF THE MODIFICATIONS TO THE POWER PLANT WILL REQUIRE
THE EXISTING GENERATORS TO BE TAKEN OFFLINE FOR APPROXIMATELY 2-3
MONTHS. A 200kW GENERATOR (E-GEN) IS LOCATED AS INDICATED AND WILL
BE USED TO PROVIDE COMMUNITY POWER DURING THIS TIME. THE UTILITY
WILL OPERATE AND MAINTAIN THE E-GEN. THE CONTRACTOR WILL BE
REQUIRED TO DO THE FOLLOWING:
A) PLAN THEIR WORK TO LIMIT THE TIME THAT THE E-GEN NEEDS TO OPERATE
TO NO MORE THAN 4 MONTHS.
B) SUBMIT THE SCHEDULE FOR OPERATION OF THE E-GEN TO THE AUTHORITY
AND THE UTILITY FOR APPROVAL A MINIMUM OF ONE MONTH IN ADVANCE.
C) FURNISH AND INSTALL ALL MATERIALS REQUIRED TO CONNECT THE E-GEN
TO THE POWER GRID AS INDICATED ON ATTACHMENT C.
D) SCHEDULE AN OUTAGE WITH THE UTILITY FOR CUTOVER FROM THE
EXISTING POWER PLANT TO THE E-GEN. NOTE THAT THE TOTAL OUTAGE
FOR THE CUTOVER MAY NOT EXCEED 8 HOURS.
10. Question: Is the standby generator presently connected to the grid?
Answer: No, it is not. See answer #9.
11. Question: What is the drop-dead date for questions?
Answer: 72 hours prior to bid opening, see Section 00 10 00.
12. Question: Can you provide us with pictures of the installed generators?
Answer: See Attachment D for representative photos of Gen #1 and #2.
13. Question: Can you provide a list of all materials being supplied with the generator?
Answer: The generator assembly and accessories are delineated in Secction 26 23 02.
A brief summary of accessories includes: Sensors (see Paragraph 2.5 K); Exhaust Flex (see Paragraph 2.8); Loose Ship Accessories (see Paragraph 2.9); and Wiring Junction Box (see Paragraph 2.12).
14. Question: Can you let us know where the generator is currently located, on site, in Bethel, or in Anchorage?
Answer: Anchorage, see Section 01 64 00 - Receipt of Owner Furnished Materials.
15. Question: Are there any living quarters available to use during the duration of this project in Tuluksak?
Answer: The Authority does not have any information on housing availability. Bidders are responsible to secure their own housing.
Page 4 of 4 Printed on 4/28/2026
16. Question: Can you please provide a point of contact with Tuluksak City to enquire about equipment and vehicle rentals?
Answer: The Tuluksak Native Community contact is Kristi Napoka and the phone number
(907) 695-6420.
17. Question: In the Project Manual, Section 080020 is listed as 080010 on the Table of
Contents.
Answer: The correct Section Number for Doors and Hardware is 08 00 20 as listed on the header and footer of the actual spec section
END OF ADDENDUM #01
Date 6/3/2025 Hour Meter 14 Generator Location AEA Shop Fuel Type Diesel Unit # 08-14361 Tech Kyler Killmer
Make Blue Star Make John Deere Model JD250-02 Model 6090HF484 Serial A-3893-1 Serial RG6090L111830 Spec - Oil Capacity in Gallons 7 KW 200 Oil Filter(s) 1370 Volts 480 Fuel Filter(s) 3975 Phase 3 Fuel / Water Separator Filter Included in filter kit^ Amps 300 Air Filter 6770 & 546771
Date of Last O/F Service 6/11/2025 Date / Duration of Last LB 6/3/25 2 hour Approx Time Needed for O/F Service, in Hours 1.5 hrs Approx Time Needed for LB 3.0 hrs
Belt & Hose Age 10/1/2012 Coolant Age 10/1/2012
Generator Information Sheet
Service and Load Bank Info.
Lifting cage removed from generator skid. Equipped with American Locks #72585/AEA connex key. Equipped with shark 200 set for 480VAC w/ 400:5 CTs. AVR setpoint voltage was was at 460VAC, raised to 480VAC. May need field adjusted after start up.
Notes
Generator Information Engine Information
ITB 26070 Tuluksak Addendum #1 Attachment A - E Gen Service ReportITB 26070 Tuluksak Addendum #1 Attachment B - E Gen Service Report
Volts Amps 480 300
Start Up Inspection Annual Svc x Repair Load Bank x x Group Num 4D x Last Change 6/11/2025 x x Battery Amps Voltage Pass / Fail Battery Amps Voltage Pass / Fail #1 #3 x #2 #4 x x x
Oil PSI 55 x x x x x Liquid / Air liquid Degree F -35 x
Approx Age 10/1/2012 x Approx Age 10/1/2012
Model Rating/Size x
Degree F 180 F x x x x x x x x x x x Diesel
Main Tank low x x x x x x
9. Pressure Test Cooling System
Ok
5. Change Fuel Filters
Ok
1. Check for Leaks
2. Fuel System Type
3. Check Fuel Level
Unit Name / Number Generator Information
Generator Maintenance Report
Date Hour Meter
14.0 08-14361
Generator Serial
A-3893-1
Generator Make
John Deere 6090HF484 RG6090L111830
Engine SerialEngine Make Engine Model
6/3/2025
Blue Star JD250-02
Generator Model
Generator Spec
2. Check Battery Connections & Terminals
Ok Changed or Svc'd
Does Not Apply
ATTN
Required1.0 Engine - Battery System x
KW Rating
ATTN
Required
Ok Changed or Svc'd
Does Not Apply
3. Check Battery Age
4. Load Test Battery(s)
1. Check Battery Electrolyte Level
2.0 Engine - Lubricating System
2. Check Oil Level
4. Take Oil Sample
3.0 Engine - Cooling System
8. Check Operating Water Temperature
4. Check Fuel Lines & Connections
14. Check Motor or Mechanical Louver Operation
1. Check for Leaks
5.0 Engine - Fuel System
13. Check Radiator Ductwork and Fan Shroud
4.0 Engine - Air Intake System
Does Not
Apply
3. Check all Air Intake Piping
ATTN
Required
ATTN
Required
2. Check Air Filters for Restriction
Ok Changed or Svc'd
Does Not Apply
Changed or Svc'd
6. Change Water Separator Filters
1. Check for Leaks
3. Check Coolant Level & Freeze Point
11. Take Coolant Sample
12. Check Fan Hub, Drive Pulley, Belt Tension / Condition & Water Pump Weep Hole
1. Check for Leaks
4. Check Coolant Condition
5. Check Hose Condition and Connections
3. Check Engine Oil Pressure
6. Check Hydraulic / Mechanical Governor Oil Level
5. Change Engine Oil, Oil Filters
10. Change Coolant Filters
ATTN
Required
Does Not Apply
Changed or Svc'd
7. Check Radiator Cap 15 PSI
2. Cooling System Type
7. Check Governor Control Linkage
8. Take Fuel Sample
Diesel / Nat Gas / LPG
6. Check Coolant Heater Operation CB125210-200
Volts DC 14.5 x Volts DC 14.3 x x x x x x x x x x
ATTN
Required
Comments / Recommendations
Ok Changed or Svc'd
Does Not Apply
3. Check Output Circuit Breaker for Loose or Unsatisfactory Lug Connections
2. Check Air Inlet & Outlet Restrictions
1. Visual Inspection of Windings for Damage or Debris
1. Check for Leaks
1. Check Battery Charger
2. Check Engine Alternator
Does Not Apply
Does Not Apply
3. Check Spark Plugs, Plug Wires, Points, Cond, Cap & Rotor
ATTN
Required
ATTN
Required
9.0 Main Generator
3. Grease Fan Pillow Block Bearing
1. Check for Vibration & Metal Cracks
Changed or Svc'd
Ok
ATTN
Required
4. Check Engine Safety Controls & Alarms on Non ECM based Engines
8.0 Engine - Exhaust System
Ok Changed or Svc'd
Changed or Svc'd
Ok
2. Check Engine Mounting Hardware
2. Check Exhaust Condition (I.E. Flex, Pipe, Silencer, Hangers, rain cap, etc)
Technician Signature: Kyler Killmer Date: 6/3/2025
6.0 Engine - Electrical System
Does Not
Apply
7.0 Engine - Related Systems
Kyler installed a Shark 200 meter, 400/5 CTs, performed a full inspection and ran load test for 2 hours.When unit returns from Tuluksak, recommend flushing cooling system and filling with 50/50 ELC
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Attachment C Tuluksak E-Gen Temporary Connection to Grid
New 200kW generator located at base of step up transformer bank.
Existing 480V step up transformers.
Location of bus bars for power connection (300A breaker located immediately above)
Bus Bars
Installation Notes:
1) Drive a 3/4”x10’ copper clad ground rod adjacent to the generator and bond to the generator ground lug or frame with minimum #2/0 copper.
2) Route 4 each minimum 300A rated conductors in temporary raceway from 480V bus bars in generator up pole and connect to step up secondary.
Attachment D Tuluksak Existing Gen#1 & Gen#2 Photos Existing Gen#1
Existing Gen#2 (Gen#1 Behind) Existing Gen#2 (Old Gen#3 Behind)
File details come from the government source that posted it. Updated .