488310 — Port and Harbor Operations
Description
This industry comprises establishments primarily engaged in operating ports, harbors (including docking and pier facilities), or canals.
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
| NAICS Code | 488310 |
|---|---|
| Industry Title | Port and Harbor Operations |
| SBA Size Standard | $47,000,000 |
| U.S. Establishments | 326 (Census CBP, 2023) |
| IRS PBA Code | 488300 (rolled-up match) |
| Sectors Hierarchy | Sector 48-49 → 488 → 4883 |
| Source / Verified | US Census 2022 NAICS Manual, Census CBP / 2026-06-28 |
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)
Related Resources & Compliance Guides
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.
- 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.
Related Industries in 4883
Frequently Asked Questions (FAQ)
Is 488310 a valid 2022 NAICS code?
NAICS 488310 is 'Port and Harbor Operations', a 2022 U.S. national industry under Sector 48-49 (Transportation and Warehousing); the SBA small-business size standard is $47,000,000.
What is the SBA size standard for NAICS 488310?
The SBA small business size standard for NAICS 488310 is $47,000,000 (based on receipts).
What is the legacy SIC code mapping for 488310?
NAICS code 488310 maps to the legacy 1987 SIC codes: 4491 - Marine Cargo Handling, 4499 - Water Transportation Services, NEC.