Attachment 6 Geanerator Specs.pdf

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Attached to
Shell Falls Primary Power
Solicitation number
1240LT26Q0038
Issued by

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This document is a Final Construction Document (CD) electrical one-line diagram for the Shell Falls Wayside Primary Power project located in the Medicine Wheel Ranger District of the Bighorn National Forest, prepared by the USDA Forest Service Rocky Mountain Region 2. The drawing, dated March 2025 and designated as sheet E3.1, illustrates the electrical infrastructure and power distribution system for the wayside facility.

The one-line diagram depicts a comprehensive electrical system including a 25 kilovolt-amp (kVA) 240/120V single-phase transformer connected to utility service, an existing medium voltage transformer noted as not in use, a 20-kilowatt propane generator rated at 240/120V with 1.6 kilowatt (3W) capacity at 6,500 feet altitude, a minimum 5,000-ampere-hour battery bank, photovoltaic (PV) panels with charge controller, utility building infrastructure with a 200/2P meter, and an isolation disconnect switch. The associated sheet notes and key notes specify critical construction requirements including coordination with existing underground utilities, PVC conduit specifications, grounding requirements (1/2" and 1/6" RMC), cable burial specifications with 3" PVC protective sleeves, removal of existing transformer feeders, a turn-key off-grid photovoltaic system with specified battery duration and operational capacity, NEMA 3R disconnect switches, and a minimum two-day site operation battery system to support loads including 24/7 bathroom lighting operations. Additional requirements address generator operational protocols, alternate underground boring provisions, and neutral-ground bonding disconnections at existing electrical infrastructure.

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1240LT26Q0038 A0003.pdf PDF
1240LT26Q0038 A0002.pdf PDF
1240LT26Q0038 A0001.pdf PDF
Q and A.pdf PDF
Attachment 5_Packaged Engine Generators.pdf PDF
Attachment 4 Shell Falls Specs.pdf PDF
Attachment 2 SOW.pdf PDF
Attachment 1 SOI.pdf PDF
1240LT26Q0038.pdf PDF
Attachment 3 BNF Shell Falls VC plans.pdf PDF
Attachment 5 Wage Determination.pdf PDF
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DWG SHEET NO.

OF

SHEETCHECKEDDESIGNERDATEDRAWING TITLE

United States Department of Agriculture Forest Service

NO. DATEBYREVISION DESCRIPTION

SHELL FALLS WAYSIDE

PRIMARY POWERREGION 2

MEDICINE WHEEL RANGER DISTRICT

BIGHORN NATIONAL FOREST

ROCKY MOUNTAIN

MARCH 2025

F

IN

A L C

O N

S T

R U

C T

IO

N

D O

C U

M E

N T

S

C D

ELECTRICAL

ONE-LINE DIAGRAM

KLC SKB

E3.1

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SHEET NOTES

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KEY NOTES

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1. COORDINATE NEW UNDERGROUND WORK WITH EXISTING COORDINATE NEW UNDERGROUND WORK WITH EXISTING UNDERGROUND UTILITIES AND EQUIPMENT.

AutoCAD SHX Text EXISTING MEDIUM VOTLAGE TRANSFORMER. TRANSFORMER IS NOT IN USE. NO UTILITY CONNECTION ON THE SITE. EXISTING 3-500 KCMIL IN 4" PVC CONDUIT AND 4" SPARE PVC CONDUIT WITH PULL STRING. EXISTING (3#2 & 1#8 GND) 1-1/2" RMC CONNECTED VIA WIRE TROUGH. EXISTING (3#1/0 & 1#4 GND) 2" RMC. EXISTING (1#6) 1/2" RMC GROUND CONDUCTOR. EXISTING (1#6) 1/2" RMC GROUND CONDUCTOR BONDED TO GROUND ROD. DO NOT BOND NEUTRAL AND GROUND IN THIS EQUIPMENT. PROVIDE (1#6) 1/2" RMC GROUND CONDUCTOR BONDED TO (1#6) 1/2" RMC GROUND CONDUCTOR BONDED TO GROUND ROD. DISCONNECT AND REMOVE FEEDERS FROM SECONDARY OF UTILITY TRANSFORMER SPLICE BOX DISCONNECTED. PROVIDE 3-#350, 1#1 QUADRUPLEX URD DIRECT BURIAL CABLE VIA EXISTING 6" PCV SLEEVE. PROVIDE 3" PVC TO EXISTING 6" SLEEVE TO ROUTE FROM THE UTILITY BUILDING TO THE RESTROOM BUILDING. FEEDER SIZED FOR VOLTAGE DROP. EXISTING 6" SLEEVE CONTAINS EXISTING 2" GRC AND 1" HDPE. PULL A MANDREL THROUGH SLEEVE TO CONFIRM CLEAR SPACE PRIOR TO PULLING CABLES. SEE KEY NOTE #14 FOR ADDITIONAL INFORMATION. PROVIDE GENERATOR INDICATED. KOHLER 20RESA(L) OR EQUAL. PROVIDE A TURN-KEY, OFF-GRID RATED, PHOTOVOLTAIC (PV) SYSTEM WITH PHOTOVOLTAIC PANELS, CHARGE CONTROLLER/INVERTER, METER, AND BATTERY BANK AS PRIMARY POWER SOURCE. PROVIDE PROPANE GENERATOR AND CONTROLS FOR GENERATOR SUPPLEMENTAL POWER SOURCE INTEGRATION. PROVIDE START UP AND COMMISSIONING OF THE FULLY INSTALLED SYSTEM. SOLARCRAFT REP TARA EASTER, 303-999-6998. AMERESCO REP KINDLE SCHMIDT, (951)-346-4826. PROVIDE SEQUENCE OF OPERATION FOR FOR PV, BATTERIES, AND GENERATOR POWER OPERATION. PROVIDE NEMA 3R ISOLATION DISCONNECT SWITCH AND WEATHERPROOF SPLICE BOX ADJACENT TO EXISTING WIRE TROUGH FOR CONNECTION AND ISOLATION OF BATTERY, PHOTOVOLTAIC PANELS, AND GENERATOR SYSTEM TO EXISTING DISTRIBUTION SYSTEM. COORDINATE EXACT LOCATION WITH CONTRACTING OFFICER PRIOR TO ROUGH-IN. PROVIDE A UNISTRUT FRAME TO MOUNT THE DISCONNECT SWITCH IF REQUIRED. SIZE SPLICE BOX TO ACCOMMODATE ALL FEEDERS AND CONNECTIONS NOTED. PROVIDE BATTERY SYSTEM TO SUPPORT A MINIMUM OF TWO DAYS SITE OPERATION BASED ON 7.2 KW METERED PEAK DEMAND LOAD, 9 HOURS OF FULL OPERATION, AND 24/7 OPERATION OF BATHROOM LIGHTS. BATTERIES PROVIDED SHALL BE RATED FOR A TEMPERATURE RANGE OF 1°-40° C. BATTERY DURATION CALCULATION SHALL INCLUDE ONLYOPERATION WITHIN THE MANUFACTURER'S RECOMMENDED DEPTH OF DISCHARGE RANGE. PROVIDE DISCONNECT SWITCH IF NOT INTEGRAL TO CHARGE CONTROLLER/INVERTER. ADD ALTERNATE: PROVIDE UNDERGROUND BORING OR DUCT BANK TO SUPPORT CONNECTION FROM UTILITY BUILDING TO EXISTING RESTROOM ELECTRICAL INFRASTRUCTURE. TRENCHING REQUIRES THE SURFACE BE PATCHED TO MATCH EXISTING CONDITIONS SUCH AS ASPHALT, CONCRETE OR VEGETATION. THE GENERATOR IS INTENDED TO OPERATE MINIMALLY. THE PV SYSTEM IS TO BE USED TO CHARGE THE BATTERIES AND SUPPORT THE SITE LOADS. THE GENERATOR IS INTENDED TO OPERATE TO CHARGE THE BATTERIES AND SUPPORT THE SITE LOADS AFTER EXTENDED PERIODS OF POOR WEATHER CONDITIONS PREVENTED PHOTOVOLTAIC POWER GENERATION AND THE BATTERIES ARE DEPLETED. PROVIDE 3-#350, 1#1 QUADRUPLEX URD DIRECT BURIAL CABLE DISCONNECT NEUTRAL-GROUND BOND AT EXISTING WIRE TROUGH AND PANELBOARD DISCONNECTS.

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PARTIAL ONE-LINE DIAGRAM

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NONE

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SPLICE BOX

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PANEL

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PANEL

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RESTROOM BUILDING 200A/2P(E)

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INFORMATION BUILDING 100A/2P(E)

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WIRE TROUGH(E)

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25 KVA, 2400V-240/120V, SINGLE PHASE TRANSFORMER(E)

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100A/2P 100A FUSES(E)

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200A/2P 200A FUSES(E)

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EXISTING UNLESS NOTED OTHERWISE

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EXISTING UNLESS NOTED OTHERWISE

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NEW UNLESS NOTED OTHERWISE

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20KW PROPANE GENERATOR 240/120V, 1 , 3WAT ALTITUDE 6,500 FT, 120 DEGREES F

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CHARGE CONTROLLER/ INVERTER

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TO UTILTIY

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PULL BOX(E)

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COMBINER BOX

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GROUND MOUNTED PHOTOVOLTAIC ARRAY

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NEW UNLESS NOTED OTHERWISE

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PANEL

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UTILITY BUILDING 200A/2P

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METER

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MINIMUM 5000AH BATTERY BANK

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ISOLATION DISCONNECT

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CONCRETE ENCASED ELECTRODE

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GND ROD

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BLDG STEEL

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GND BUS

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ISC-1,000

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BIDDER QUESTION RESPONSES

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KC

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