488310 — Port and Harbor Operations
Description
This industry comprises establishments primarily engaged in operating ports, harbors (including docking and pier facilities), or canals (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- Providing stevedoring and other marine cargo handling services (except warehousing)--are classified in
- Industry 488320, Marine Cargo Handling;
- Providing navigational services to shipping--are classified in Industry 488330, Navigational Services to
- Shipping; and
- Operating docking and/or storage facilities, known as marinas--are classified in Industry 713930, Marinas.
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 4491 - Marine Cargo Handling (via SIC1987:4491→NAICS1997:48831→2002:488310→2007:488310→2012:488310→2017:488310→2022:488310)
- SIC 4499 - Water Transportation Services, NEC (via SIC1987:4499→NAICS1997:48831→2002:488310→2007:488310→2012:488310→2017:488310→2022:488310)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC M1BC — OPERATION OF RADAR AND NAVIGATIONAL FACILITIES
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 488310 valid in 2022? ▾
Yes, 488310 is a valid 6-digit 2022 NAICS national industry code representing 'Port and Harbor Operations' under Sector 48-49 in the official classification index.
What is the SBA size standard for NAICS code 488310? ▾
The Small Business Administration (SBA) has established a small business size standard of $47,000,000 for NAICS code 488310 (Port and Harbor Operations), calculated based on receipts.
What is the legacy SIC equivalent for NAICS 488310? ▾
According to official Census Bureau concordance tables, NAICS code 488310 (Port and Harbor Operations) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 4491 - Marine Cargo Handling, 4499 - Water Transportation Services, NEC.
Related Pages & Tools
Further regulatory reference links for NAICS code 488310:
- Sector 48-49 Directory Hub — List of related industries in the Transportation and Warehousing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 488310 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Port and Harbor Operations).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.