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It establishes key terms, document order of precedence, and general provisions governing permits, applicable codes, submittals, design documents, and the controlling role of Specification 104. 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\n(REVISED 1 1/07/2025)  \nQuestions regarding Specification No. 104 may be directed to the Underground Structures Utility  \nCoordination Group via email at [dwpps.coordination@ladwp.com](dwpps.coordination@ladwp.com)  \nTABLE OF CONTENTS  \nSECTION 1 – TERMS, DEFINITIONS, AND ABBREVIATIONS ............................................................. 3  \nSECTION 2 – GENERAL PROVISIONS................................................................................................ 5  \nSECTION 3 – INSPECTION ................................................................................................................ 7  \nSECTION 4 – SURVEY ....................................................................................................................... 9  \nSECTION 5 – EXCAVATION ............................................................................................................ 10  \nSECTION 6 – SUBSTRUCTURE INSTALLATION ............................................................................... 13  \nSECTION 7 – SUBSTRUCTURE VENT INSTALLATION...................................................................... 19  \nSECTION 8 – SUBSTRUCTURE AND VENT BACKFILL ...................................................................... 20  \nSECTION 9 – CONDUIT INSTALLATION .......................................................................................... 22  \nSECTION 10 – CONDUIT ENCASEMENT AND TRENCH BACKFILL .................................................. 34  \nSECTION 11 – CONTRACTOR RESPONSIBILITIES ........................................................................... 37  \nAPPENDIX I .................................................................................................................................... 39  \nAPPENDIX II ................................................................................................................................... 45  \nSECTION 1 – TERMS, DEFINITIONS, AND ABBREVIATIONS  \nBrown Book – Latest edition, with amendments, of the Standard Specifications for Public Works Construction (Greenbook) adopted by the City of Los Angeles Board of Public Works (LABPW) .  \nCalOSHA-California Division of Occupational Safety and Health Administration  \nCaltrans-California Department of Transportation  \nCity – City of Los Angeles  \nContractor – The individual or company that will perform the work as specified on the permit and design documents.  \nDepartment – Los Angeles Department of Water and Power.  \nDepartment Engineer – The engineer of record for any Department design.  \nDepartment Representative – Department personnel responsible for approving coordinating, reviewing, designing, approving design changes, and/or approving field changes.  \nGreenbook – Latest edition of the Standard Specifications for Public Works Construction (Greenbook) as adopted according to the Brown Book, latest edition.  \nPublic Right-of-Way – Refers to any land, property, or interest therein owned by a city, town, or state, which is available for use by the general public. This includes but is not limited to public streets, alleys, sidewalks, bicycle lanes, and pedestrian pathways.  \nSubstructure – Any underground structure providing easy access points for maintenance, inspection, and management of underground equipment and utility. This includes, but is not limited to, Hand Holes, Maintenance Holes, Switchpads, Transformer Pads, and Vaults.  \nSubstructure Standards Engineer – The Department Engineer responsible for the creation and modification of Department Specifications and Standards.  \nSwitchpad (SP)– Reinforced concrete pad used to support and anchor an above ground mounted switchgear.  \nTransformer Pad (TP)– Reinforced concrete pad used to support and anchor an above ground mounted transformer.  \nCL – Centerline  \nCSA – Ca","cbCairREzpxCMATG","https://ap.wps.com/l/cbCairREzpxCMATG","pdf",562013,47,"English","# SECTION 1 - TERMS, DEFINITIONS, AND ABBREVIATIONS\n# SECTION 2 - GENERAL PROVISIONS\n# SECTION 3 - INSPECTION\n# SECTION 4 - SURVEY\n# SECTION 5 - EXCAVATION\n# SECTION 6 - SUBSTRUCTURE INSTALLATION\n# SECTION 7 - SUBSTRUCTURE VENT INSTALLATION\n# SECTION 8 - SUBSTRUCTURE AND VENT BACKFILL\n# SECTION 9 - CONDUIT INSTALLATION\n# SECTION 10 - CONDUIT ENCASEMENT AND TRENCH BACKFILL\n# SECTION 11 - CONTRACTOR RESPONSIBILITIES\n# APPENDIX I\n# APPENDIX II","[{\"question\":\"What voltage range does Specification 104 cover for underground circuits?\",\"answer\":\"Specification 104 is intended for underground circuits rated up to 34.5 kV. Higher-voltage underground circuits fall under the Underground Transmission Engineering Group’s jurisdiction.\"},{\"question\":\"How are conflicts between documents resolved under the specification?\",\"answer\":\"Conflicts are governed by an order of precedence: required permits first, then applicable codes, then approved submittals, followed by design documents, Specification 104, applicable standards from LADWP common service and construction standards, and finally Greenbook/Brown Book requirements for installation on Public Right-of-Way.\"},{\"question\":\"What topics are addressed in the main sections of the document?\",\"answer\":\"The document covers terms and abbreviations, general provisions, inspection and survey, excavation, installation of substructures and vent systems, backfill for substructures and vents, conduit installation and trench backfill, contractor responsibilities, and appendices.\"}]","Underground Power Distribution - Specification 104 - Revised 1/07/2025 | PDF",118]