SIC 1623 — Water, Sewer, Pipeline, and Communications and Power Line Construction
Description & Classification
SIC code 1623 representing 'Water, Sewer, Pipeline, and Communications and Power Line Construction' is an industry category in the Standard Industrial Classification (SIC) system under U.S. OSHA and Federal procurement registers.
Modern NAICS Crosswalk
Trace the modern equivalent classifications in the 2022 North American Industry Classification System (NAICS) database:
- NAICS 237120 - Oil and Gas Pipeline and Related Structures Construction (via SIC1987:1623→NAICS1997:23491→2002:237120→2007:237120→2012:237120→2017:237120→2022:237120)
- NAICS 237110 - Water and Sewer Line and Related Structures Construction (via SIC1987:1623→NAICS1997:23491→2002:237110→2007:237110→2012:237110→2017:237110→2022:237110)
- NAICS 237130 - Power and Communication Line and Related Structures Construction (via SIC1987:1623→NAICS1997:23492→2002:237130→2007:237130→2012:237130→2017:237130→2022:237130)
Classification Details
| SIC Code | 1623 |
|---|---|
| Industry Title | Water, Sewer, Pipeline, and Communications and Power Line Construction |
| Division | Division C: Construction |
| Major Group | Major Group 16: Heavy Construction - Other Than Building Construction Contractors |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 1623:
- SIC Codes Complete Compliance Guide — Detailed history and active legal applications of the SIC classification framework.
- Why Legacy SIC Codes Persist Guide — How credit systems and the SEC still rely on SIC metadata.
- SIC ↔ NAICS Crosswalk Tool — Trace industrial code conversions dynamically.
- SIC Major Group 16 Hub — View other legacy industries in this business division.
Related Industries in Major Group 16
Frequently Asked Questions (FAQ)
What industry does SIC code 1623 represent?
SIC 1623 is 'Water, Sewer, Pipeline, and Communications and Power Line Construction', a 4-digit Standard Industrial Classification (SIC) code under Major Group 16: Heavy Construction - Other Than Building Construction Contractors (Division C: Construction); it maps to modern 2022 NAICS code(s): 237120 (Oil and Gas Pipeline and Related Structures Construction), 237110 (Water and Sewer Line and Related Structures Construction).
What is the modern 2022 NAICS mapping for SIC 1623?
SIC code 1623 maps to modern NAICS codes: 237120 - Oil and Gas Pipeline and Related Structures Construction, 237110 - Water and Sewer Line and Related Structures Construction, 237130 - Power and Communication Line and Related Structures Construction.