A06_Mount_Lewis_-_dwg_set_5-20-24.pdf

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Mount Lewis

U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

UNITED STATES DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

LOCATION OF NEW SHELTER VICINITY MAP

Directions to Mount Lewis From BLM Battle Mountain District Office, 50 Bastian Rd, Battle Mountain, NV 89820

1. Turn left on NV-305 N (0.4 mi)

2. Turn right onto Nevada 305 Frontage Rd/ Old 8A (4 mi)

3. Turn left onto Presidential Blvd (0.7 mi)

4. Turn right onto 1500 E (1.1 mi)

5. Turn right onto Presidential Blvd (0.6 mi)

6. Turn left onto Old 8A (9 mi)

7. Turn left on Mt. Lewis Access Rd (11.4 mi)

8. Turn right on site access road and follow to existing facility

Lat: 40°24'09.25"N

Long: 116°51'51.30"W Elevation: 9,550 feet

AMSL

Soil Testing Report

Soil Testing Layout

Electrical One-Line (Blank to be provided by Contractor)

Title Sheet

Site Layout

Shelter Layout

T1

A1

E1

E2

A2

TITLESHEET NO. DWG. NO.

SHEET INDEX

External Grounding7 E3

01/28/2021

01/28/2021

01/28/2021

01/28/2021

01/28/2021

01/28/2021

Revision Date

01/28/2021

AREA REFERENCE MAP

SYMBOL

INTERSTATE HIGHWAY

U.S. HIGHWAY

STATE HIGHWAY

DESCRIPTIONSYMBOL

STATE CAPITOL

FACILITY LOCATION

BLM FIELD OFFICE

DESCRIPTION

Mount Lewis

Battle Mountain

District Office

Mount Lewis

Soil Resistivity Testing

Mount Lewis

4 7

5 10 15 20 Testing Notes

Meter Readings Ω Ω Ω Ω

1 of 2 36 13.9 7.3 N/A

2 of 2 35 10.8 8.9 N/A

Soil Resistivity Calculations

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

1 of 1 34,470 26,619 20,969 N/A

2 of 2 33,513 20,682 25,565 N/A

Enter Highest Amount (Worst Case) 34,470

Grounding Enhancement Material (GEM) 85%

Calculation with GEM 29,300

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

Soil Resistance at 34,470 Ω-cm QTY R 1/R 1/R1+R2 Rtotal (Ω)

Four 10 ft. Long, 3/4 in. Diameter Ground Rods

Installed Vertical, Spaced 20 ft. Apart in 30 in.

Deep Trench (R1)

4 ea. 28.279 0.0354

#2 AWG, Bare, Solid, Tinned Copper interconnecting Ground Rods in Trench without

GEM (R2)

40 ft. 43.598 0.0229

Complex Grounding Electrode System Resistance CALCULATIONS

0.0583 17.15

GRT300

1804667

Typical Resistivity (approx.), Ω-cm

Testing completed at multiple depths in two locations from east to west, 20 feet apart on each side of the proposed shelter location. Soil resistance tested at 34,470 (Ω-cm) at a depth of 5 feet, shall be used as a basis for caluclations for the grounding system.

86 Deg. Fahrenheit

Ted Sumners

07/21/20

Bureau of Land Management

Mount Lewis

Rocky with Some Clay, Sand and

Gravel

2/1/2019

Extech

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

NOTES

GEM Can lower the soil resistivity between 15 and

30 % depending on how much is used

TEST DATA

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) - AUTO CALCULATION

3/32” = 1'

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Proposed New 8x10 PEPRO Shelter

Soil Resistivity Testing

Mount Lewis

Test Line 1Test Line 1

Test Line 2Test Line 2

5 ft.

10 ft.

15 ft.

Each Test Line Measured at 5, 10 and 15-foot Depths

Highest Soil Resistivity Measurement: = 34,470 Ω-cm

Existing Shelter With

BLM Equipment

Existing Self-Supporting

Tower With BLM Antennas

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Electrical One-Line

(To Be Provided By Contractor)

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Ground Shelter Ground

Tab to Ground Ring 1B

1B

20 ft

1B

3/4 in.

Typical Ground Rod (¾ in. Diameter 10 ft. Long) x 4

Spaced 20 feet Apart 30 in. Deep Trench

10 ft

Grade

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

1B Concrete Encased Electrode Bonded to Ground Ring 6 in

12 Feet

8 x 10 Shelter8 x 10 Shelter

AAcccceessss DDoooorr

13 Ground Shelter Ground

Tab to Ground Ring

Each Outrigger Bonded to Ground Ring

1B

Shelter Ground Ring

Grounding System Layout

Mount Lewis

Ground Existing Tower Ground

Bus Bar to Ground Ring

Ground Pass-Through Bus Bar in Electrical

Entrance Panel to Ground Ring

GROUNDING SYSTEM CALCULATIONS

Soil Resistivity = 34,470 Ω-cm

Rtotal = 17.15 Ω

Soil Resistance at 34,470 Ω-cm QTY R 1/R 1/R1+R2 Rtotal (Ω) Four 10 ft. Long, 3/4 in. Diameter Ground Rods Installed Vertical, Spaced 20 ft. Apart in 30 in. Deep Trench (R1) 4 ea. 28.279 0.0354

#2 AWG, Bare, Solid, Tinned Copper interconnecting Ground Rods in Trench without GEM (R2) 40 ft. 43.598 0.0229

Complex Grounding Electrode System Resistance CALCULATIONS

0.0583 17.15

Typical Ground Rod

VERTICAL GROUND ROD INSTALL