Tap Line Cases
The Court ruled that logging railroads known as tap lines, even though built and owned by lumber companies, were common carriers rather than mere private plant facilities, because they were organized under state law to serve the public and connecting railroads treated them as carriers.
The decision means these lines could keep sharing in the joint freight rates paid to move lumber to market, while leaving the Interstate Commerce Commission free to police any unfair rate-sharing arrangements that amounted to disguised rebates.
“It is the right of the public to use the road’s facilities and to demand service of it rather than the extent of its business which is the real criterion determinative of its character.”
The Court's core test for deciding whether a railroad counts as a common carrier.
How it got here: The Interstate Commerce Commission ordered trunk railroads to stop sharing rates with the tap lines; the Commerce Court set aside that part of the order, and the government appealed to the Supreme Court.
The Case in Depth
What happened
Several short "tap line" railroads in the South hauled logs from the woods to sawmills and then hauled finished lumber to junctions with major trunk-line railroads. The tap lines were owned by the same lumber companies whose logs and lumber they carried. The Interstate Commerce Commission ruled that these tap lines were not real common carriers but merely private equipment ("plant facilities") of the lumber companies, and ordered the trunk lines to stop paying them a share of shipping revenue.
The question before the Court
Were the small "tap line" railroads that hauled logs for lumber companies really just private plant equipment, or were they common carriers entitled to a share of railroad freight rates?
Why it matters
Lumber companies that owned short connecting railroads kept the ability to collect a share of shipping revenue for the log and lumber traffic those lines carried, instead of losing that revenue entirely. At the same time, the ruling preserved the Commission's power to stop these arrangements if they were being used to give favored lumber companies secret rebates or unfair advantages over competitors.
What changes now
The Commerce Court's decree affirming the tap lines' status as common carriers stands, meaning they may continue receiving a share of joint freight rates. The Interstate Commerce Commission remains free to investigate and correct specific rate divisions that function as improper rebates or discriminate against other shippers or carriers, so disputes over the fairness of particular rate-sharing arrangements may continue before the Commission.
What this does not decide
The Court did not decide that lumber companies could freely set their own rate divisions with trunk lines. It made clear the Commission still has full power to reduce or disallow any division of joint rates that amounts to an unfair rebate or discriminatory preference for a tap line's owners.
Concurrences and dissents
How the Justices voted
Majority (1). Justice Day (author).
How the Court got there
The legal reasoning, step by step
- The Court first confirmed that the Commerce Court had power to review the Commission's order, because the amended order was affirmative in substance (requiring the trunk lines to stop certain payments) rather than a mere refusal to act, which would not have been reviewable.
- The Court then identified the real question as whether the tap lines were common carriers or merely private plant facilities, explaining that a railroad's status as a common carrier turns on the public's legal right to demand service from it, not on how much of its actual traffic happens to belong to its owners.
- Applying its recent decision in Union Lime Co. v. Chicago & N.W. Ry. Co., the Court reasoned that a rail line built mainly to serve one private industry can still be part of the public transportation system, subject to public regulatory obligations, once it is organized and operated under that public authority.
- The Court found the tap lines met every mark of a common carrier: they were incorporated as carriers under state law, could use eminent domain, hauled freight for hire for outside shippers, and were treated as carriers by the connecting trunk lines.
- The Court noted that Congress, in writing the Commodities Clause, had specifically exempted timber and lumber products from the rule barring carriers from hauling goods they themselves owned, showing Congress expected railroads owned by timber companies to keep operating as carriers of their own products.
- Because the tap lines qualified as common carriers for both outside shippers and their own affiliated lumber companies, the Court concluded the Commission had no basis to strip them of their share of joint rates altogether, though the Commission retained full authority to correct any division of rates that amounted to an unlawful rebate or discrimination.
Doctrinal impact
Cases affected by this decision
Reaffirms Union Lime Co. v. Chicago & N.W. Ry. Co. (233 U.S. 211)
Relied on to hold that a spur track built for one private industry can still be a regulated common-carrier facility.
Distinguishes Procter & Gamble Co. v. United States (225 U.S. 282)
Court said this case did not bar review here because the facts were undisputed and only legal conclusions were at issue.