A06_Tenabo_-_Layout_Drawings.pdf

Tenabo

U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENTUNITED STATES DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

NEW CABINET LOCATION VICINITY MAP

Directions to Tenabo

From Elko Nevada

1. Head west on I-80 go 18.4 mi

2. Take exit 279 for NV-278 toward W Carlin/Eureka go 0.3 mi

3. Turn left onto NV-278 S/Bush St go 48.1 mi

4. Turn right onto J D Ranch Rd go 3.6 mi

5. Continue straight onto Tonkin Road for 0.1 mi

6. Continue straight onto Buckhorn Road for 0.7 mi

7. Continue onto Cortez Beowawe Road for 4.4 mi

8. Turn left to stay on Cortez Beowawe Road for 4.1 mi

From this point the Cortez Gold Mine roads are used to gain access to the site. A BLM escort is required as the mine roads shift.

Latitude: 40° 09'44.36"N

Longitude: 116°34'05.74"W

Elevation: 8,929 ft. AMSL

Soil Resistivity Testing Layout

Electrical One-Line – To Be Developed by Contractor

Title Sheet

Facility Layout Plan

Soil Resistivity Testing Worksheet

T1

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TITLESHEET NO. DWG. NO.

SHEET INDEX

01/28/2021

01/28/2021

01/28/2021

01/28/2021

Revision Date

AREA REFERENCE MAP

SYMBOL

INTERSTATE HIGHWAY

U.S. HIGHWAY

STATE HIGHWAY

DESCRIPTIONSYMBOL

STATE CAPITOL

FACILITY LOCATION

BLM FIELD OFFICE

DESCRIPTION

Typical PEPRO 2-Bay Micro Cabinet Layout3 A2 01/28/2021

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External Grounding7 E3 01/28/2021

Elko District Office

Facility Layout

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Existing BLM

Shelter and Tower

Proposed New

PEPRO Cabinet

Rock Peak

Swale

(GFM)

21 ft. 5.5 in.

Concrete Pedestal with UFER (x4)

3 2 - BAY MICRO CABINET

11 ft.

8 ft.

Exhaust

20-Foot Articulating Mast

Electrical Entrance Box

Passive Air Intake

Electrical Entrance Box

UL 1449 Surge Protection (x2)

100 Amp Filters (x4)

DC Wiring Entry

Pass-Through Ground Bus Bar

Pass-Through Ground Bus Bar

Solar Panels

Exhaust

Passive Air Intake

Rack Ground Bus Bar (RGB)

RF Cable Entrance

1/4” = 1'

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Typical Pepro 2-Bay Micro Cabinet Layout

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Typical Pepro 2-Bay Micro Cabinet Layout

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Typical Pepro 2-Bay Micro Cabinet Layout

Repeater

Duplexer

SOLAR PANEL INSTALLATION (TYPICAL)19

Angle = to Latitude

SOLAR PANEL GROUNDING (TYPICAL)20

EQUIPMENT INSTALLATION AND GROUNDING (TYPICAL)

Rack Ground Bus Bar (RGB)17

Ground Equipment To RGB with #6 AWG, Stranded Green-Jacketed Grounding Conductors Using Single-Hole UL 467 Listed Connectors

Ground Duplexer

18 Ground Battery Shelf

RGB Grounded to Pass-Through Bar with #2 AWG, Green-Jacketed Grounding Conductor Using Two-Hole UL 467 Listed Connectors

Batteries

18 Ground Misc. Ancillary Devices

Ground Each Solar Panel to common ground bus conductor

Ground Solar Panels to TGB with common #2 AWG, Bare, Solid, Tinned Copper Ground Bus Conductor Using UL 467 Listed Crimp Connectors

Tower Ground Bus Bar (TGB)

1B

16 Tower Ground Bus Bar

(TGB)

Tower Ground Bus Bar

(TGB)

Soil Resistivity Testing

4 7

5 10 15 20 Testing Notes

Meter Readings Ω Ω Ω Ω

1 of 3 68 58 36 N/A

2 of 3 Fail Fail Fail N/A

3 of 3 90 60 49 N/A

Soil Resistivity Calculations

5 10 15 20 p = (Ω-cm) p = (Ω-cm) p = (Ω-cm) p = (Ω-cm)

1 of 3 65,110 111,070 103,410 N/A

2 of 3 Fail Fail Fail N/A

3 of 3 86,175 114,900 140,753 N/A

Enter Highest Amount (Worst Case) 140,753

Grounding Enhancement Material (GEM) 70%

Calculation with GEM 98,527

Test Completed By

Date

Client/Project

Site Location Name /ID

Ground Resistance Tester

Model:

Serial Number:

Calibration Date:

Soil Description

Ambient Conditions

Present Conditions (dry, rain, snow):

Date of last precipitation:

Min Average Max

590 2370 7000

340 4060 16,300

1020 15,800 135,000

59,000 94,000 458,000

07/21/20

Pepro/BLM

Tenabo

Gravel, sand, stones with little clay or loam

GEM Can lower the soil resistivity between 15 and 30 % depending on how much is used

2/1/2019

TEST DATA

Extech

Test Location Spacing (Test Depth) Feet p= 191.5 x A x R p= soil reisistivity in Ω-cm

A = Distance betw een test rods (in feet)

R = Resistance obtained from tester

Test Location

Conversion to (Ω-cm)

GRT300

1804667

Typical Resistivity (approx.), Ω-cm

Same, with varying proportions of sand and gravel

Gravel, sand, stones with little clay or loam

Dry

Unknown

Typical Soil Descriptions

Ashes, cinders, brine, waste

Clay, shale, gumbo, loam

Soil resistivity testing was completed in three separate lines. Test location1 of 3 was completed near the exisitng tower and shelter. The highest measurment was at 10 feet deep measuring 111,070 Ω-cm.

Two separate tests were performed at the proposed location for the new PEPRO 2-Bay cabinet. Test location 2 of 3 failed with measurments exceeding 2,000 Ohms. Measurments were obtained on test location 3 of 3 for multiple depths from 5 feet to 15 feet. The highest measurment of 140,753 Ω-cm will be used as the basis for the grounding system layout. The use of grounding enhancement material (GEM) in the grounding system trench is calculated to lower the resistivity to 98,527 Ω-cm.

Single ground rod resistance for a 10-foot long, 3/4-inch diameter copper clad steel ground rod is calculated at 316.72 Ohms using

LORESCO calculator. Singe electrode resistance for a 20-foot long, 2.12-inch diameter electrotytic grounding electrode is 49.33 Ohms.

Three radial grounds are used in the design with three (3) ten-foot long, 3/4-inch diameter ground rods in each radial plus one 20-foot long, 2.12-inch diameter electrolytic grounding electrode for a system resistance of 23.6 Ohms.

91 Deg. Fahrenheit

Ted Sumners

NOTES

Soil Resistivity Testing

Test Line 1Test Line 1

Test Line 2Test Line 2

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Existing BLM Shelter and Tower

Proposed New PEPR

Rock Peak

Swale

Highest Soil Resistivity Measurement: = 140,753 Ω-cm

Calculated Single Ground Rod Resistance: = 316.72 Ω (10ft x 0.75 in. Ground Rod)

Calculated Single Ground Rod Resistance: = 49.33 Ω (20 ft x 2.12 in. Electrolytic Grounding Electrode)

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Electrical One-Line

(To Be Developed By Contractor)

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60 Amp Distribution

Surge Protection

PV Battery Load

Sense(+) (-) (+) (-) (+) (-)

60 Amp PV Charger/Controller

Fuse within 6 inches

Exhaust FanExhaust Fan

Repeater 1Repeater 1

12 AWG

12 AWG

60 AMP

DC Distribution

Rack Ground Bus

TYPICAL NOT FOR CONSTRUCTION

Repeater 2Repeater 212 AWG

Repeater 3Repeater 312 AWG

SpareSpare12 AWG

2 AWG

105 Ah Batteries (x4)

Pass-Through Bus Bar

Grounding System Layout

Typical Ground Rod ¾ in. Diameter 10 ft. Long

5 #2 AWG, Bare, Solid, Tinned Copper Grounding Conductor

Shelter Ground Ring #2 AWG, Bare, Solid, Tinned Copper Grounding Conductor

1B Concrete Encased Electrode Bonded to Ground Ring

Radial with two 10 ft. Long Ground Rods Spaced 20 ft. Apart Encased in 2 inches of GEM

Proposed New 2-Bay PEPRO Cabinet with 20 ft Articulating Mast

Swale Radial with two 10 ft. Long Ground Rods Spaced 20 ft. Apart Encased in 2 inches of GEM

Radial with two 10 ft. Long Ground Rods Spaced 20 ft. Apart Encased in 2 inches of GEM

20 Solar Panel Grounding

3 Tower Ground Bus Bar

Bond Grounding Tabs on Cabinet to Ground Ring

N

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GROUNDING SYSTEM COMPONENTS – 94 BAGS OF GEM

Shelter Ground Ring with three 10 ft.

Long Ground Rods Spaced 20 ft. Apart

Encased in 2 inches of GEM

Complex Grounding Electrode System Resistance

Soil Resistivity = 140,153 Ω-cm (1407.53 Ω-m) QTY R (Ω) 1/R 1/R1+R2+

R3+R4 Rtotal (Ω)

BAGS

of GEM

Ground Ring: Four 10 ft. Long, 3/4 in. Diameter Ground Rods Installed Horizontal, Spaced 14 ft. Apart On Center in 30 in. Deep Trench Interconnected with #2 AWG

Embedded in 2 inches of GEM in 80 linear ft. / 20 ft Diameter Trench (R1)

1 60.68 0.0165 67

Ground Radial: Two 10 ft. Long, 3/4 in. Diameter Ground Rods with 20 ft. # 2 AWG, Bare, Tinned Solid Embedded in 2" Deep GEM in 12" wide, 20 linear ft. Trench (R2) 1 101.84 0.0098 9

Ground Radial: Two 10 ft. Long, 3/4 in. Diameter Ground Rods with 20 ft. # 2 AWG, Bare, Tinned Solid Embedded in 2" Deep GEM in 12" wide, 20 linear ft. Trench (R3) 1 101.84 0.0098 9

Ground Radial: Two 10 ft. Long, 3/4 in. Diameter Ground Rods with 20 ft. # 2 AWG, Bare, Tinned Solid Embedded in 2" Deep GEM in 12" wide, 20 linear ft. Trench (R4) 1 101.84 0.0098 9

TOTAL 94

GROUND RING WITH THREE 20-FOOT RADIALS

CALCULATIONS

0.05 21.77

GROUNDING SYSTEM CALCULATIONS

Ground each concrete encased electrode, grounding tab and pass-through bar

#2 AWG Embedded in GEM 2

in. Deep /12 in. Wide Trench

Vert ical Ground Rods

Interconnected with #2 AWG

#2 AWG Embedded in GEM 2

in. Deep /12 in. Wide Trench

Vert ical Ground Rods

Interconnected with #2 AWG

10 ft

VERTICAL GROUND ROD INSTALLATION

Grade

Trench

30 in. Deep/12 in. Wide

Grounding Enhancement Material

2 in. Deep/12 in. Wide Entire Length of Trench

10 ft

VERTICAL GROUND ROD INSTALLATION

Grade

Trench

30 in. Deep/12 in. Wide

Grounding Enhancement Material

2 in. Deep/12 in. Wide Entire Length of Trench

#2 AWG Embedded in GEM 2

in. Deep /12 in. Wide Trench

Vert ical Ground Rods

Interconnected with #2 AWG

10 ft

VERTICAL GROUND ROD INSTALLATION

Grade

Trench

30 in. Deep/12 in. Wide

Grounding Enhancement Material

2 in. Deep/12 in. Wide Entire Length of Trench

Ground RF Cables to TGB with Ground Kit and to Internal Entry Panel Using PEPRO Grounding Strap

Install Surge Protection Device on RF Cable within 24 inches of Entry into Cabinet