design criteria for work order # c-19034 caltrans road ...lmud 60 kv transmission line relocation...

DESIGN CRITERIA

For

Work Order # C-19034 CalTrans Road Widening Project

State Route 36 West of Goodrich Creek to Fredonyer Campground

Revision C

Prepared by:

Electrical Consultants, Inc.

3521 Gabel Road Billings, MT 59102

QA/QC Review and Sign-Off:

Task Responsible Individual Date Prepared Transmission Engineer Tony Trudnowski 9/18/19 Reviewed Transmission QA/QC Will Waylander 9/19/19

Issued Project Manager Kent Schacht 9/24/19

COPYRIGHTED Copyright @ 2019 Electrical Consultants, Inc., Billings, MT All Rights Reserved, Unauthorized Reproduction Prohibited

LMUD 60 KV TRANSMISSION LINE RELOCATION

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Table of Contents

1.0 PROJECT SUMMARY ....................................................................................................... 1-1 Project Overview .......................................................................................................... 1-1 General Design Consideration ...................................................................................... 1-1

Route Information ................................................................................................ 1-1 Survey Information .............................................................................................. 1-2 Right-of-Way (ROW) .......................................................................................... 1-2 Geotechnical Investigation ................................................................................... 1-2 Structures ............................................................................................................. 1-2 Foundations .......................................................................................................... 1-2 Conductors, Shield Wires and OPGW ................................................................. 1-2 Insulators .............................................................................................................. 1-3 Aerial Markers ..................................................................................................... 1-3 Transposition Structures (does not apply to this project) .................................... 1-3 Removal of Existing Facilities ............................................................................. 1-3 Switch Structures (does not apply to this project) ............................................... 1-3 Distribution Underbuild ....................................................................................... 1-3

2.0 ELECTRICAL DESIGN CRITERIA .................................................................................. 2-1 Maximum Ampacity of Standard Conductor ................................................................ 2-1 Overhead Ground Wires ............................................................................................... 2-1 Insulation and Hardware ............................................................................................... 2-1

Insulators .............................................................................................................. 2-1 Insulator Swing .................................................................................................... 2-1 Splicing ................................................................................................................ 2-2 Dampers and Spacers ........................................................................................... 2-2

Lightning Protection and Grounding ............................................................................ 2-2 Lightning Protection ............................................................................................ 2-2 Structure Grounding............................................................................................. 2-2 Bonding ................................................................................................................ 2-2 Splice Enclosures ................................................................................................. 2-2 Touch Potential .................................................................................................... 2-2 Fence Grounding .................................................................................................. 2-3

Transmission Line Impedance ...................................................................................... 2-3 Transmission Phasing ................................................................................................... 2-3

3.0 STRUCTURAL DESIGN CRITERIA ................................................................................. 3-1 Codes and Standards ..................................................................................................... 3-1 Failure Containment ...................................................................................................... 3-1 Weather Cases ............................................................................................................... 3-1 Structure Design ............................................................................................................ 3-1

Loading and Strength Factors .............................................................................. 3-2 Structure Types .................................................................................................... 3-2

Hardware Requirements ................................................................................................ 3-2 Guys and Guy Anchor Requirements ........................................................................... 3-2 Guy Strain Insulators .................................................................................................... 3-2 Insulator String Strength Factors .................................................................................. 3-2


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Conductors and Shield Wires........................................................................................ 3-3 Wire Tension Criteria ................................................................................................... 3-3

4.0 CLEARANCE DESIGN CRITERIA ................................................................................... 4-1 General .......................................................................................................................... 4-1 Vertical Clearances ....................................................................................................... 4-1 Vertical Clearance between Wires ................................................................................ 4-1 Horizontal Clearance between Adjacent Circuits ......................................................... 4-1 Vegetation ..................................................................................................................... 4-1 Galloping....................................................................................................................... 4-2 EMF Clearances (not required for L-G voltages less than 98 kV, NESC 232.D.3.c) .. 4-2

5.0 EMBEDMENT AND FOUNDATION DESIGN CRITERIA ............................................. 5-1 Maximum Loading ........................................................................................................ 5-1 General Embedment Design ......................................................................................... 5-1 Concrete Design ............................................................................................................ 5-1 Reinforced Drilled Pier Design ..................................................................................... 5-1 Design Software ............................................................................................................ 5-1 Monopole/Three-Pole Deflection and Rotation Criteria ............................................... 5-1 H-Frame Criteria ........................................................................................................... 5-1

6.0 ENVIRONMENTAL DESIGN CRITERIA ........................................................................ 6-1 APLIC ........................................................................................................................... 6-1

Locations with Larger Birds ................................................................................ 6-1 Vertical Clearances .............................................................................................. 6-1 Tangent Posts ....................................................................................................... 6-1 Braced Posts ......................................................................................................... 6-1 Strain Insulators ................................................................................................... 6-1 Bird Flight Diverters ............................................................................................ 6-1 Bird Discouragers ................................................................................................ 6-2

Storm Water Pollution Prevention Plan (SWPPP)........................................................ 6-2 Fire Regulations ............................................................................................................ 6-2

7.0 ADDITIONAL INFORMATION ....................................................................................... A-1 References .................................................................................................................... A-1

Appendix A Weather Cases

Appendix B Structure Loading and Strength Factors

Appendix C Clearance Table

Appendix D Conductor Sizing

Appendix E Line Rating

Appendix F Impedance Calculations


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Appendix G ROW Calculations

Appendix H Insulator Assemblies


1-1

1.0 PROJECT SUMMARY

Project Overview

The CalTrans Road Widening Project 60 kV Transmission Line “Project” is located near Westwood in Lassen County, California in a GO95 Heavy Loading District. The project includes rerouting portions of two single circuit 60 kV lines where necessary in order to add driving lanes to Highway 36. The lines include intermittent underbuilds and taps. The lines will be designed and constructed to meet the minimum requirements as set forth by GO95 and NESC. Specifically, the design will satisfy GO95 Heavy Loading District requirements for Grade A construction and satisfty NECS Medium District requirements for Grade B construction, both codes are required to be satisfied in the state of California. Where one code is greater, the driving code will be chosen and satisfied.

General Design Consideration

Route Information

Lassen Municipal Utility District (LMUD) will be responsible for developing the route with technical input provided by ECI. An attempt will be made to keep the lines within their existing Right-of-Ways (ROWs) where possible. Terrain: The transmission line is routed through heavy forestry with

moderate elevation changes. The specific locations of interest involve crossing a highway, and it is therefore possible that span lengths will not be equal in locations of relocation and that change in tension sections is possible.

Access: The route will primarily be accessible from local roads, where structure access is presumed to be along the right-of-way (ROW).

Structures: There is some existing infrastructure along the route. Infrastructure includes: Highway 36, rural roads, and houses.

Utilities: There are existing distribution and transmission lines along the route.

Public lands: The route is a current ROW and includes stretches through Lassen National Forest.

Roads: Route runs along and crosses Highway 36 in three locations Constraints: Land constraints include environmentally sensitive areas such as

forested areas and wetlands. The route stays within the current ROW as much as possible to avoid these constraints.


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Survey Information

Survey data has been provided. If needed, additional survey will be requested in locations specific to areas of the lines which may need to be relocated. The coordinate system for the lines were defined as State Plane, NAD83, California I, International Feet.

Right-of-Way (ROW)

Wherever relocations are performed, ROW will comply with applicable codes, including: NESC, RUS, local, state, and other national codes. Conductor displacement shall be determined based on structure configuration, weather cases listed in Table 1.2.3, and structure deflection.

Table 1.2.3: ROW Clearances 1 At Rest 9.7 ft.2 NESC Clearance 6 psf. 6.7 ft.3 Extreme Wind 20.736 psf. (90 mph) 1 ft.1

4 GO95 At Rest 6 ft.Notes: 1. Extreme wind from NESC 250C and ASCE 7-05, 50 year Mean Recurrence Interval (MRI)

Geotechnical Investigation (does not apply to this project)

Structures

The Project is to be constructed with wood monopole and H-frame structures. Typical structure heights range from 45 feet to 70 feet above ground-line. Structure geometry is clearly identified on structure detail drawings, drawing series T003.

Foundations

The foundations for the Project are to be direct embed. The single circuit tangent structures or non-containment structures with less than a 2° line angle shall be backfilled with an engineered backfill. For more detailed information regarding the design of the foundations, see Section 5.0 of this document.

Conductors

Conductor for both of the single circuit overhead 60 kV transmission lines is single conductor 477 kcmil 19/0 strand AAC “COSMOS”. There is a stretch (From str. 1-7/7 to str. 1-9/5) of 2.4kV underbuild consisting of single conductor #2 AWG 7/1 strands ACSR “SPARATE” For more detailed information regarding the conductor design, see Section 2.1, and Section 2.2 of this document.


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Insulators

Insulators shall be single post-type assemblies for new monopole tangent structures and suspension bell-string type assemblies H-frame tangent structures. Bell-string type assemblies will also be used for new deadend structures. The lines shall be designed to operate at 60 kV phase-to-phase. For more detailed information pertaining to the insulator design, see Section 2.3 and Section 3.7 of this document.

Aerial Markers

The project is not located in the immediate vicinity of any airports. Structure locations and heights will not be evaluated during detailed design.

Transposition Structures (does not apply to this project)

Removal of Existing Facilities

Removal of existing structures shall be in accordance with the outage plan. All parties affected by any outage and or the removal of the existing line shall coordinate with the Invenergy to ensure proper communication between all parties. The Engineer will provide a list of removal units as material needed to facilitate the outage and any additional hot work which may be required.

Switch Structures (does not apply to this project)

Distribution Underbuild

Distribution underbuild will be designed to accomodate the 2.4kV existing factilities. Locations can be found on the Staking Sheets. Distribution assemblies will be single phase #2 AWG 7/1 kcmil Sparate ACSR with one conductor and one neutral conductor.


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2.0 ELECTRICAL DESIGN CRITERIA

Maximum Ampacity of Standard Conductor

The emergency or maximum operating temperature for line rating and used in part for calculating vertical clearances is 100°C. Normal operating temperature for the line based on a conductor temperature of 75°C.

Overhead Ground Wires (does not apply to this project)

Insulation and Hardware

Insulators

Minimum insulator insulation values are listed in Table 2.3.1 below. A contamination level of Light has been assumed for the required leakage distance. Insulator strength factors are provided in Section 3.8 of this document. Insulator cut sheets have been provided as part of Appendix H.

Table 2.3.1: Insulation Values1

Insulator Assembly

60 kV

LeakageDistance

(in)

60-Hz Dry Flashover

(kV)

60-Hz Wet Flashover

(kV)

Critical Impulse Positive

(kV)

Critical Impulse Negative

(kV)

Vertical Post 63 255 235 385 505

Horizontal Post 63 255 235 385 505

2-bell suspension (2.4 kV)

23 160 100 250 260

5-bell suspension 57.5 400 250 625 650

6-bell suspension (deadend)

69 480 300 750 780

Distribution Vertical Post (2.4kV)

5 45 25 70 85

Notes: 1. Insulation values listed above exceed those required by code, NESC 2017 273.

Insulator Swing

All insulator designs have been analyzed utilizing insulator swing analysis software within PLS-CADD. Allowable insulator swing angle is dependent upon insulator assembly geometry. Structure and insulator geometry has been selected to prevent electrical clearance violations to the structure under required weather conditions. These weather conditions are defined in Table 2.3.2.


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Table 2.3.2: Insulator Swing Cases

Case Number Case Description Required

Clearance to Structure (in.)

Condition 1: No Wind, 60°F, conductor at Creep RS 251 Condition 2: 6 psf. wind, 32°F, conductor at Initial RS 16 Condition 3: 6 psf. wind, 60°F, conductor at Creep RS 16 Condition 4: 90 mph, 60°F, conductor at Creep RS 5

1. The NESC requirement of 25 inches exceeds the GO95 requirement at the same weather case (No wind, 60°F, conductor in Creep condition)

Splicing

All dead end clamps, splices, and connectors will be specified as bolted type hardware or implosive joined. For purposes of design, splices shall be assumed to be full tension unless utilized for the installation of jumper wire. Splices shall not be placed over road spans or within one (1) span of a deadend structure or above crossings. The number of splices shall be per the Contractors stringing plan. The Contractors stringing plan shall be reviewed for pulling-tensioning site and splice locations for the conductor prior to issuing the 70% procurement package.

Dampers and Spacers (does not apply to this project)

Lightning Protection and Grounding

Lightning Protection (does not apply to this project)

Structure Grounding

All transmission structures should be grounded such that the resistance is less than or equal to 25 ohms. If during construction, a significant percentage of structures do not adhere to this resistance requirement, additional action should be taken to improve lightning mitigation performance.

Bonding

Neutral wire type is existing. Bonding wire has been selected to meet the GO 95 and NESC requirement of having a continuous ampacity of not less than one-fifth that of the conductors to which they are attached. All pole line hardware should be bonded.

Splice Enclosures (does not apply to this project)

Touch Potential

Maximum touch potential shall be determined for all objects accessible by the public and by utility crews if an analysis of AC interference for parallel utilities is


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required. IEEE Std. 80 and OSHA Std. 2207 part 1926 sets the guidelines for voltage and current density limits.

Fence Grounding (does not apply)

Transmission Line Impedance (does not apply to this project)

Transmission Phasing

The transmission phasing will be confirmed with phasing at the substations prior to issuing the 90% package for review. A phasing diagram located within the drawing series T006 will be provided for review with the 90% submittal package. There are not transposition structures located in the project.


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3.0 STRUCTURAL DESIGN CRITERIA

Codes and Standards

The structural design for the transmission line has been performed in accordance with the latest accepted revision of the following list of codes and standards:

RUS Bulletin 1724E-200, Design Manual for High Voltage Transmission Lines

National Electrical Safety Code C2-2017 (NESC 2017)

California Public Utilities Commission General Order No. 95 (G095), Rules for

Overhead Electric Line Construction

ASCE Manuals and Reports on Engineering Practice No. 74, Guidelines for Electrical Transmission Line Structural Loading

ACI 336.3, Report on Design and Construction of Dilled Piers

Other recognized standards are used when required to serve as guidelines for the design when they do not conflict with the above listed standards.

Failure Containment

Failure containment structures or deadend structures are defined as structures which are designed to support the full structural loading with either all ahead or all back span wires disconnected. Deadend structures should be considered at major crossings (such as over large roadways or waterways). Deadends should also be considered to limit cascading failures in long line sections. A minimum of one (1) deadend structure shall be placed every 5 miles to limit cascading failure.

Weather Cases

The weather cases in Appendix A shall be included when designing structures and shall be incorporated into the PLS-CADD model.

Structure Design

All structures shall be modeled in PLS-POLE and placed in a PLS-CADD model to check their strength and usage. Modeled structures shall match installed structures in geometry, embedment, attachment points, and strength.


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Loading and Strength Factors

All structures will be designed in accordance with NESC Section 25 loading criteria and NESC Section 26 structure strength criteria and as additionally required per GO95 Section IV. Wind shall be applied in the direction of greatest effect and largest applied stress. Construction cases shall also be considered to account for caught-in-block conductor or failing conductor splices. Deadend structures are designed for all intact load cases as well as controlling deadend loading. The structure loading and strength factors have been provided in Appendix B.

Structure Types

Transmission structures will utilize post and porcelain bells. Structure height and spacing will be clearly identified and provided with the staking sheets and plan and profile drawings, drawing series T005 and T004 respectively. Structures are monopole and H-Frame design. Running angle and deadend structures shall be direct embed.

Hardware Requirements

Hardware shall be designed to comply with NESC Section 26 and GO95 Section IV. All hardware shall be selected to have an ultimate strength greater than or equal to the element it attaches to the pole. Hardware shall also have dimensional compatibility with all attached members and be able to withstand all allowable swing angles.

Guys and Guy Anchor Requirements

Guy wires shall be installed at a tension of 2% of the wire’s ultimate tension and shall be within +/- 6 inches of specified horizontal placement. A strength reduction factor for guy wires is referenced in Appendix B. Anchors must not be rated for an ultimate strength less than that of the guy wire or that of the guy wire assembly where double guys are specified.

Guy Strain Insulators

Guy strain insulators shall be designed with a strength at least equal to the strength of the guy wire in accordance with NESC 279 and GO95 Section IV. A strength reduction factor equal to that of the guy wire shall be applied to the guy strain insulator. The guy strain insulator shall have a minimum rated dry flashover voltage equal to double the line voltage, a minimum rated wet flashover voltage equal to the nominal line voltage between conductors, and be made of fiber-reinforced polymer (NESC 279.A.1.b).

Insulator String Strength Factors

NESC Section 27 dictates the required insulator strength factors. The strength factors shown in Table 3.8 have been applied to their respective insulator configuration.


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Table 3.8: Insulator String Strength Factors Insulator Assembly

Configuration

GO95 Grade “A”1

NESC District Loading2

Extreme Loading Non-Ceramic2

Extreme LoadingPorcelain &

Glass2

Suspension

33% (% of ANSI

standard SML or M&E strength)

50% (% of ANSI


65% (% of ANSI


65% (% of ANSI


Dead-end Assembly

33% (% of ANSI


50% (% of ANSI


65% (% of ANSI


65% (% of ANSI


Line Post3

33% (% of ANSI

standard STL strength)

50% (% of ANSI


50% (% of ANSI


50% (% of ANSI


Pin

33% (% of ANSI

standard cantilever strength)

40% (% of ANSI


--

40% (% of ANSI


Notes: 1. From GO95 2018 Rule 44.1 2. From NESC 2017 277. 3. Line Post specified cantilever load for NESC District Loading is 40% (% of ANSI standard SCL strength).

Conductors

The 477 kcmil 19/0 strand AAC “COSMOS” is being used to match the existing line. Table 3.9 contains the physical characteristics of this conductor

Table 3.9: Conductor and Shield Wire Data

Name Size StrandingRated Strength

(lbs.) Diameter

(in) Area (in2)

Unit Weight(lbs./ft.)

COSMOS 477 kcmil 19/0 8360 0.793 0.374 0.4475 SPARATE #2 AWG 7/0 3640 0.325 0.0654 0.1067

Wire Tension Criteria

Conductor design tensions are designed to match existing tension, and area where tensions are increase or changed, sag tables will be provided.


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Table 3.10.1: Wire Stringing Criteria for Conductor

Weather Case Cable Condition % of Ultimate

NESC 250B Medium Initial RS 50 NESC 250C Initial RS 70 NESC 250D Initial RS 70

NESC 261H1C Initial RS 35 NESC 261H1C Creep RS 25

GO95 Loading 43.2 Initial RS 50 20°F Initial RS 20


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4.0 CLEARANCE DESIGN CRITERIA

General

Minimum clearances shall be taken at the closest energized parts of the overhead transmission line. Clearances shall comply with NESC 2017 at maximum line operating condition and with GO95 with a 60°F no wind weather case. See Appendix C for target design clearance tables. Refer to NESC 441 for live line maintenance clearance requirements.

Vertical Clearances

Vertical clearances for ground and objects below the transmission line are checked based on the following conditions:

Final sag at max operating conductor temperature of 212°F (100°C) 32°F, no wind, radial ice thickness from Rule 250B, Final Final unloaded sag, conductor temperature of 120°F Final sag at 60°F with no wind (GO95 requirement of 30’)

Vertical Clearance between Wires

Vertical clearances between wires have been analyzed for the conditions defined in Table 4.3. These conditions and associated wire-to-wire clearances have been analyzed based upon the intact condition of both conductor and shield wires. Wind has not been applied in the calculation of vertical clearance between wires.

Table 4.3: Conditions for Application of Clearance

Criteria Between Conductors Upper Conductor Lower Conductor

212°F, Final 60°F, Final 32°F, radial ice thickness from Rule 250B, Final 32°F, Final

Horizontal Clearance between Adjacent Circuits

If vertical clearance is met, no horizontal clearance will be considered. If vertical clearance is not met, the horizontal wire-to-wire clearance shall be based on GO95 and NESC 235.

Vegetation

Where overhead conductors traverse trees and vegetation, necessary and reasonable clearances are to be measured between line conductors and vegetation under normal conditions. See Appendix C for radial clearance of bare line conductors from tree branches or foliage.

Additional clearances beyond those stated in Appendix C may be deemed appropriate based on various factors such as: operating voltate, length of span, line sag, species type, growth rate and characteristics, local climate, elevation, and fire risk.


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Galloping

Galloping has been considered for the single-loop case for spans less than 600 feet and for the double loop case for spans greater than 600 feet, measured at the quarter span points (RUS Bulletin 1724E-200 6.5.1). The calculated Lissajous loops shall be separated by one-foot.

The loading criteria to determine the swing and sag of the conductors are (respectively):

32°F, radial ice thickness from Rule 250B, 2 psf. wind 32°F, radial ice thickness from Rule 250B, no wind

EMF Clearances (not required for L-G voltages less than 98 kV, NESC 232.D.3.c) (does

not apply to this project)

The vertical clearances to roads shall be increased, as required, due to the electric static effects and in efforts to limit the steady state current to no more than 5 mA per RMS current requirements of NESC 2017 Rule 232.D.3.c. A ground clearance of [40] feet for single circuits is generally required over roads to maintain this limit.


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5.0 EMBEDMENT AND FOUNDATION DESIGN CRITERIA

Maximum Loading

Loads used for the design of embedments and reinforced concrete dilled piers shall be determined using the maximum ground line reactions.

General Embedment Design

Tangent structures with a line angle less than 2° shall be direct embedded and backfilled with an approved engineered backfill. All embedments shall have appropriate properties to support end bearing. Embedments shall be designed considering lateral and axial-compression loading.

Concrete Design (does not apply to this project)

Reinforced Drilled Pier Design (does not apply to this project)

Design Software (does not apply to this project)

Monopole/Three-Pole Deflection and Rotation Criteria (does not apply to this project)

H-Frame Criteria

H-Frame foundations shall be designed in HFAD. Foundation loading shall not exceed the capacity of the soil for the four load cases where these groundline reactions occur:

1) Maximum uplift 2) Maximum moment and corresponding uplift 3) Maximum compression 4) Maximum moment and corresponding compression 5) Maximum compression (settlement)

Where ultimate loading with load factors is considered for all load cases with the exception of case five (5). Settlement shall be limited to two inches (2-in.) under maximum compression loading without load factors. The capacity of the soil shall be appropriately factored by the Geotechnical Contractor, but no further reduction shall be taken.


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6.0 ENVIRONMENTAL DESIGN CRITERIA

All structures in both design and placement shall be compliant with all components of the environmental assessment.

APLIC

APLIC standards are generally met by structures in lines over 138 kV without any modifications with respect to phase to phase and phase to ground configurations. For structures in lines under 138 kV, several items should be taken into consideration to meet APLIC standards and mitigate the danger to raptors and other large bird species.

Locations with Larger Birds

In locales with bird species that have a wing span of over 60 inches, greater horizontal clearances between energized and grounded parts should be considered. These species include Bald Eagles, Golden Eagles, Great Horned Owls, White Pelicans, and Storks. Projects in locations with these species present should be examined on a case by case basis to determine the best approach.

Vertical Clearances

APLIC recommends a vertical separation of 26-48 inches between energized and grounded parts.

Tangent Posts

If the tangent post insulated section is less than 60 inches, the insulators should not be bonded. However, this increases the risk of pole fires and if this risk is unacceptable, then insulator covers, perching deterrents, or longer insulators may be used alternatively.

Braced Posts

Braced post insulators are considered to be adequate perching deterrents for raptors and no additional raptor protection is required.

Strain Insulators

All strain insulators should be bonded. However, when jumper posts are used, there is a risk of perching raptors coming into contact with bonded hardware. To help mitigate this risk, insulator covers, perching deterrents, and insulators with longer insulated sections can be used alternatively.

Bird Flight Diverters

Bird flight diverters should be used in specified areas. They are generally of the PVC type and should be spaced at 15 feet to 30 feet intervals for moderate and high traffic areas, respectively. If two shield wires are used, then bird flight diverters should be staggered between each shield wire.


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Bird Discouragers

Bird discouragers shall be used if needed. Type, placement, and quantity shall be determined on a case by case basis.

Storm Water Pollution Prevention Plan (SWPPP)

A Storm Water Pollution Prevention Plan (SWPPP) should be developed and followed. The SWPPP should include measures for pollutant discharge protection as well as erosion and sediment control.

Fire Regulations

All State, County, National Forest Service, BLM, and any other regulatory administration’s fire safety guidelines and regulations shall be followed.


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7.0 ADDITIONAL INFORMATION

References

The applicable copies of the documents listed are the referenced published versions used in design.

National Electrical Safety Code C2-2017 (NESC 2017)

CPUC General Order 95 (GO95), Rules for Overhead Electric Line Construction

RUS Bulletin 1724E-200, Design Manual for High Voltage Transmission Lines

PLS-CADD Manual, Copyright Power Line Systems, Inc.

MFAD v5.2 Manual, FAD Tools International, LLC

HFAD v5.2 Manual, FAD Tools International, LLC


A-1

APPENDIX A WEATHER CASES

Appendix A ‐ Weather Cases

DescriptionAir Density Factor (Q) (psf/mph^2)

Wind Velocity (mph)

Wind Pressure (psf)

Wire Ice Thickness

(in)

Wire Ice Density (lbs/ft^3)

Wire Ice Load (lbs/ft)

Wire Temp. (deg F)

Ambient Temp. (deg F)

Weather Load Factor

NESC Constant (lbs/ft)

Wire Wind Height Adjust Model

Wire Gust Response Factor

NESC 250B Medium(4psf, 0.25", 15°F, 0.2) 0.00256 39.5 4.0 0.25 57 0 15 1 0.2 None 1

NESC 250C (90 mph) 0.00256 90.0 20.7 0 0 0 60 60 1 0 NESC 2017 NESC 2017

NESC 250D (0.25", 30mph) 0.00256 30.0 2.3 0.25 57 0 15 15 1 0 None 1

NESC 261H1b Medium(15°F) 0.00256 0.0 0.0 0 0 0 15 15 1 0 None 1

NESC 261H1b.2 (60°F) 0.00256 0.0 0.0 0 0 0 60 60 1 0 None 1

NESC Blowout 234.A.2 (6psf, 60°F) 0.00256 48.4 6.0 0 0 0 60 60 1 0 None 1

GO95 Heavy Loading 43.1 0.00256 48.4 6.0 0.5 57 0 0 1 0 None 1

No Wind (SWING 1) 0.00256 0.0 0.0 0 0 0 60 60 1 0 None 1

Moderate Wind (SWING 2) 0.00256 48.4 6.0 0 0 0 32 32 1 0 None 1

Moderate Wind (SWING 3) 0.00256 48.4 6.0 0 0 0 60 60 1 0 None 1

High Wind (SWING 4) 0.00256 90.0 20.7 0 0 0 60 60 1 0 None 1

GALLOPING (SWING) 0.00256 28.0 2.0 0.25 57 0 32 32 1 0 None 1

GALLOPING (SAG) 0.00256 0.0 0.0 0.25 57 0 32 32 1 0 None 1

Extreme Ice (0.25", 30°F) 0.00256 0.0 0.0 0.25 57 0 30 30 1 0 None 1

Construction Loading (2psf, 60°F) 0.00256 28.0 2.0 0 0 0 60 60 1 0 None 1

Construction Loading (2psf, 30°F) 0.00256 28.0 2.0 0 0 0 30 20 1 0 None 1


B-1

APPENDIX B STRUCTURE LOADING AND STRENGTH FACTORS

Appendix B ‐ Structure Loading and Strength Factors

Wire Vert. Load Factor

Wire and Struct.

Wind Load Factor

Wire Tension Load Factor

Struct. Weight Load Factor

Struct. Wind Area

Factor

Strength Factor

Steel Poles Tubular‐ Arms Towers

Strength Factor Wood Poles

Strength Factor

Concrete Poles

Ultimate

Strength Factor Guys

Strength Factor Non‐Tubular Arms

Strength Factor Braces

Strength Factor

Insulators

Strength Factor

Foundation

RULE 250B NESC 250B Medium(4psf, 0.25", 15°F, 0.2) 1.5 2.5 1.65 1.5 1 1 0.65 1 0.9 0.65 0.65 1 1

RULE 250C NESC 250C (90 mph) 1.1 1.1 1.1 1.1 1 1 0.75 1 0.9 0.75 0.75 0.8 1

RULE 250D NESC 250D (0.25", 30mph) 1.1 1.1 1.1 1.1 1 1 0.75 1 0.9 0.75 0.75 0.8 1

RULE 277 (250B) Post NESC 250B Medium(4psf, 0.25", 15°F, 0.2) 1 1 1 1 1 1 0.65 1 0.9 0.65 0.65 0.4 1

RULE 277 (250C) Post NESC 250C (90 mph) 1 1 1 1 1 1 0.75 1 0.9 0.75 0.75 0.4 1

RULE 277 (250D) Post NESC 250D (0.25", 30mph) 1 1 1 1 1 1 0.75 1 0.9 0.75 0.75 0.4 1

RULE 277 (250B) NESC 250B Medium(4psf, 0.25", 15°F, 0.2) 1 1 1 1 1 1 0.65 1 0.9 0.65 0.65 0.5 1

RULE 277 (250C) NESC 250C (90 mph) 1 1 1 1 1 1 0.75 1 0.9 0.75 0.75 0.5 1

RULE 277 (250D) NESC 250D (0.25", 30mph) 1 1 1 1 1 1 0.75 1 0.9 0.75 0.75 0.5 1

GO95 43.1 ‐ Grade B GO95 Heavy Loading 43.1 1 1 1 1 1 0.8 0.33 0.66 0.5 0.5 0.5 0.5 1

GO95 43.1 ‐ Grade A GO95 Heavy Loading 43.1 1 1 1 1 1 0.8 0.25 0.66 0.5 0.5 0.5 0.33 1

Extreme Ice (Factored) Extreme Ice (0.25", 30°F) 1.1 1.1 1.1 1.1 1 1 0.75 1 0.9 0.75 0.75 0.8 1

Extreme Ice (Working) Extreme Ice (0.25", 30°F) 1 1 1 1 1 1 0.75 1 0.9 0.75 0.75 0.8 1

RULE 250B DE Back NESC 250B Medium(4psf, 0.25", 15°F, 0.2) 1.5 2.5 1.65 1.5 1 1 0.65 1 0.9 0.65 0.65 1 1

RULE 250B DE Ahead NESC 250B Medium(4psf, 0.25", 15°F, 0.2) 1.5 2.5 1.65 1.5 1 1 0.65 1 0.9 0.65 0.65 1 1

RULE 250C DE Back NESC 250C (90 mph) 1.1 1.1 1.1 1.1 1 1 0.75 1 0.9 0.75 0.75 1 1

RULE 250C DE Ahead NESC 250C (90 mph) 1.1 1.1 1.1 1.1 1 1 0.75 1 0.9 0.75 0.75 1 1

RULE 250D DE Back NESC 250D (0.25", 30mph) 1.1 1.1 1.1 1.1 1 1 0.75 1 0.9 0.75 0.75 1 1

RULE 250D DE Ahead NESC 250D (0.25", 30mph) 1.1 1.1 1.1 1.1 1 1 0.75 1 0.9 0.75 0.75 1 1

Extreme Ice DE Back (Factored) Extreme Ice (0.25", 30°F) 1.1 1.1 1.1 1.1 1 1 0.75 1 0.9 0.75 0.75 1 1

Extreme Ice DE Ahead (Factored) Extreme Ice (0.25", 30°F) 1.1 1.1 1.1 1.1 1 1 0.75 1 0.9 0.75 0.75 1 1

Extreme Ice DE Back (Working) Extreme Ice (0.25", 30°F) 1 1 1 1 1 1 0.75 1 0.9 0.75 0.75 1 1

Extreme Ice DE Ahead (Working) Extreme Ice (0.25", 30°F) 1 1 1 1 1 1 0.75 1 0.9 0.75 0.75 1 1

Everyday Deflection Everyday Deflection (60°F) 1 1 1 1 1 1 1 1 1 1 1 1 1 2

Imbalanced Ice (Ahead w/Ice) Extreme Ice (0.25", 30°F) 1 1 1 1 1 1 1 1 1 1 1 1 1

Imbalanced Ice (Back w/Ice) Extreme Ice (0.25", 30°F) 1 1 1 1 1 1 1 1 1 1 1 1 1

Broken Wire NESC 250D (0.25", 30mph) 1 1 1 1 1 1 1 1 1 1 1 1 1

Pole Tip Deflect. Limit %

Description Weather case

Strength FactorsLoad Factors


C-1

APPENDIX C CLEARANCE TABLE

Appendix C ‐ Clearance Table

Feat. Code Feature DescriptionLine From

Feature Top To Bottom

Aerial Obst‐ acle

Point is on Ground

Req Vert Clear 20kV (ft)

Req Horiz Clear 20kV (ft)

Req Vert Clear 60kV (ft)

Req Horiz Clear 60kV (ft)

128 MARSH No No Yes 0 0 25 0

132 STREAM_CL No No Yes 0 0 25 0

143 H_WATER_<20 No No Yes 0 0 27 0

151 PLAYGRND_EDGE No No Yes 0 0 0 0

198 GROUND_SHOT No No Yes 15 0 22 0

200 BUILDING_LINE No No Yes 0 0 0 0

206 ROOF_LINE No Yes No 0 6 12 6

207 ROOF_PEAK Yes No No 0 6 12 6

208 DWELLING_ROOF No Yes No 0 6 12 6

209 DWELLING No No Yes 0 0 0 0

210 STORAGE_TANK Yes No No 0 10 10 10

215 STORAGE_TANK_W_CATWAL Yes No No 0 10 12 10

220 SIGN Yes No No 0 10 10 10

223 STEEL_POST Yes No No 0 10 10 10

224 FLAG_POLE Yes No No 0 10 10 10

225 ANTENNA Yes No No 0 10 10 10

226 TRAFFIC_SIGNAL Yes No No 0 10 10 10

227 SIGNAL_CNTRL_BX No No Yes 0 0 0 0

251 MISC_STR_TOP Yes No No 0 10 10 10

296 TOP_OF_WALL Yes No No 0 10 10 10

297 CHIMNEY/STACK Yes No No 0 10 10 10

320 FENCE_LINE No No Yes 0 0 0 0

327 GUARD_RAIL Yes No No 0 10 10 10

328 FENCE_GATE_CL No No Yes 0 0 0 0

336 BENCH_MARK: Yes No No 0 0 0 0

340 SURVEY_CL No No Yes 0 0 0 0

401 CONC_RD_EDGE No No Yes 0 0 0 0

411 BIT_RD_EDGE No No Yes 0 0 0 0

412 BIT_PARKING No No Yes 0 0 0 0

421 GRAVEL_RD_EDGE No No Yes 0 0 0 0

431 UNMPRVD_RD_EDGE No No Yes 0 0 0 0

440 RR_TRACK_CL No No Yes 0 0 34 0

441 TOP_OF_RAIL Yes No No 0 0 34 0

446 SIDEWALK_FRONT No No Yes 0 0 0 0

447 SIDEWALK_BACK No No Yes 0 0 0 0

451 BRIDGE_EDGE No No Yes 0 0 0 0

455 CONC_CULVERT No No Yes 0 0 0 0

456 CR_MTL_CULVERT No No Yes 0 0 0 0

499 TRAIL No No Yes 0 0 0 0

799 INSUL_ATT_PT No Yes No 0 0 0 0

800 TA_DE No Yes No 0 0 0 0

812 TA_POST_C No Yes No 0 0 0 0

813 TA_STRING_C No Yes No 0 0 0 0

850 DA_DE No Yes No 0 4 6 4

851 DA_TANGENT No Yes No 0 4 6 4

852 DA_ELEV No Yes No 0 4 6 4

853 DA_XING No Yes No 0 8 8 8

862 SPAN GUY XING No Yes No 0 6 6 6

900 TRANS_POLE No No No 0 0 0 0

Appendix C


D-1

APPENDIX D CONDUCTOR SIZING

Does not apply to this project


E-1

APPENDIX E LINE RATING



F-1

APPENDIX F IMPEDANCE CALCULATIONS



F-1

APPENDIX G ROW CALCULATIONS



G-1

APPENDIX H INSULATOR ASSEMBLIES

Input:

Notes:1. Contamination level description, per RUS:

2.

Office: BillingsClient:

25

385

LMUD

Project No. LMUD-013

Objective:

Input

Subject: Insulation Calculations for Post - HPS #P250024S1020Project Name: Horselake to Susanville 60 kVBy: AJT Date: 9/20/2019 Chk. By: WFW Date:

Site Properties

9/24/2019 Rev. A

601.05

235

To calculate transmission insulation recommendations.

The lightning impulse flashover considerations of IEEE 1313 require a study to complete.

IEEE 1313.2-1999: IEEE Guide for the Application of Insulation CoordinationRUS Bulletin 1724E-200: Design Manual for High Voltage Transmission Lines

DescriptionNominal Ph-Ph Line Voltage (kV)

Symbol InputVT

Areas with industries not producing particularly polluting smoke and/or areas with average density of houses quipped with heating plants. Areas with high density of houses and/or rainfall. Areas exposed to winds from the sea but not less than 10 miles form the coast

540025

Light

ReferencesNESC C2-2017: National Electrical Safety Code

Description

--RIc

--

ManufacturerPart NumberStrike Distance (in)Leakage Distance (in)

P250024S102025

505

Insulator TypeInsulator is Bell String?

Line TOV, p.u.Elevation (ft)Footing Resistance (Ω)Lightning Impulse Current (kA)Contamination Level

Insulator Properties

60 Hz Dry Flashover (kV)60 Hz Wet Flashover (kV)Critical Impulse Flashover, Positive (kV)Critical Impulse Flashover, Negative (kV)Insulator Material Polymer

Post

HPS

63255

No

Detailed Calculations:

Results:

Negative Impulse (kV)

Tables 8-1 and 8-2 Recommendations - not provided for this voltage

Date:9/20/2019 Chk. By: WFW


Subject: Insulation Calculations for Post - HPS #P250024S1020Project Name:By: TJT Date:

LMUD

Leakage Distance (in)

RUS 1724E-200 Recommendations - 60 kV

60 Hz Low Freq Dry (kV)

60 Hz Low Freq Wet (kV)

Positive Impulse (kV)

Horselake to Susanville 60 kV


Rev. A

Contamination Considerations: Leakage Distance

Insulator Properties Summary

---- -- -- --

Table 8-4 Leakage Distance (in): 53.6

44.6

60 Hz Flashover (kV) 160.4

MiscellaneousImpulse Flashover 25kA Strike (kV): 676.4

Insulator PropertySatisfies IEEESatisfies CIGRESatisfies IECSatisfies NESC60 Hz Flashover (kV)

Critical Impulse Flashover (kV)

63

235

385


Satisfies IEEE

Result

44.6155.4160.4676.4

Ins. Calc.41.360.8

Switching-Surge Considerations: Phase-to-Ground Flashover

Ic x R + √2 x V/√3 x T =

MethodIEEE

CIGREIEC

Leakage Distance (in)41.360.8

155.4347826Dry Flashover (kV)NESC 273 Requirements

IEEE 1313.2-1999

9/24/2019

Input:


2.




60 Hz Dry Flashover (kV)60 Hz Wet Flashover (kV)Critical Impulse Flashover, Positive (kV)Critical Impulse Flashover, Negative (kV)Insulator Material Polymer

Post

HPS

63255

No


540025

Light


Description

--RIc

--


P250024S223025

505



Symbol InputVT

Site Properties

9/24/2019 Rev. A

601.05

235



Subject: Insulation Calculations for Post - HPS #P250024S2230Project Name: Horselake to Susanville 60 kVBy: AJT Date: 9/20/2019 Chk. By: WFW Date:


25

385

LMUD


Objective:

Input


Results:


IEEE 1313.2-1999

9/24/2019


Ic x R + √2 x V/√3 x T =

MethodIEEE

CIGREIEC


Satisfies IEEE

Result

44.6155.4160.4676.4

Ins. Calc.41.360.8

60 Hz Flashover (kV)


63

235

385

Leakage Distance (in)Insulator Property

Satisfies IEEESatisfies CIGRESatisfies IECSatisfies NESC


---- -- -- --


44.6



By: TJT Date:

LMUD








Rev. A






Subject: Insulation Calculations for Post - HPS #P250024S2230Project Name:

By A. E. Schwalm at 11:58 am, May 01, 2014

05-01-14

Input:


2.




60 Hz Dry Flashover (kV)60 Hz Wet Flashover (kV)Critical Impulse Flashover, Positive (kV)Critical Impulse Flashover, Negative (kV)Insulator Material Porcelain

Post

Victor

1745

No


540025

Light


Description

--RIc

--


8R5

85



Symbol InputVT

Site Properties

10/28/2019 Rev. A

2.41.05

25



Subject: Insulation Calculations for Post - Victor #8RProject Name: LMUD 60 KV Transmission RelocationBy: AJT Date: 10/28/2019 Chk. By: WFW Date:


25

70

LMUD


Objective:

Input


Results:

20Dry Flashover (kV)NESC 273 Requirements

IEEE 1313.2-1999

10/28/2019


Ic x R + √2 x V/√3 x T =

MethodIEEE

CIGREIEC


Satisfies IEEE

Result

1.820.06.7

627.1

Ins. Calc.1.72.4



17

25

70




---- -- -- --


1.8



By: TJT Date:

LMUD


RUS 1724E-200 Recommendations - 2.4 kV




LMUD 60 KV Transmission Relocation


Rev. A






Subject: Insulation Calculations for Post - Victor #8RProject Name:

tjtrudnowski

Rectangle

tjtrudnowski

Rectangle

Input:


2.





Suspension, I-String

LAPP

57.5400

Yes


540025

Light


Description

--RIc

--


8200 -- 5 bells38.75

650



Symbol InputVT

Site Properties

9/24/2019 Rev. A

601.05

250



Subject: Insulation Calculations for Suspension, I-String - LAPP #8200 -- 5 bellsProject Name: Horselake to Susanville 60 kVBy: T. Trudnowskik Date: 9/20/2019 Chk. By: WFW Date:


25

625

LMUD


Objective:

Input


Results:


IEEE 1313.2-1999

9/24/2019


Ic x R + √2 x V/√3 x T =

MethodIEEE

CIGREIEC


Satisfies IEEE

Result

44.6155.4156.7676.4

Ins. Calc.41.360.8



57.5

250

625


Satisfies IEEE

Satisfies IECSatisfies NESC


---- -- -- --


44.6



By: TJT Date:

LMUD








Rev. A






Subject: Insulation Calculations for Suspension, I-String - LAPP #8200 -- 5 bellsProject Name:

Input:


2.





Strain, Deadend

LAPP

23160

Yes


540025

Light


Description

--RIc

--


8200 -- 2 bells15.5

260



Symbol InputVT

Site Properties

9/24/2019 Rev. A

201.05

100



Subject: Insulation Calculations for Strain, Deadend - LAPP #8200 -- 2 bellsProject Name: Horselake to Susanville 60 kVBy: AJT Date: 9/20/2019 Chk. By: WFW Date:


25

250

LMUD


Objective:

Input


Results:


IEEE 1313.2-1999

9/24/2019


Ic x R + √2 x V/√3 x T =

MethodIEEE

CIGREIEC


Satisfies IEEE

Result

14.968.954.4

642.1

Ins. Calc.13.820.3



23

100

250




---- -- -- --


14.9



By: TJT Date:

LMUD








Rev. A






Subject: Insulation Calculations for Strain, Deadend - LAPP #8200 -- 2 bellsProject Name:

design criteria for work order # c-19034 caltrans road ...lmud 60 kv transmission line relocation...

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