The Scots Mines Co. and William Borron v. The Leadhills Mining Co. and Others

Factual and Procedural Background

Appellant and Respondent are neighbouring mineral lessees of Landlord in a mining district comprising two adjacent valleys, Valley A and Valley B. Valley A historically drained into Stream A, while Valley B was reached through Level X, a man-made drainage level. In 1851 Appellant sought an interdict in the Court of Session to stop Respondent from breaking through the natural barrier between the valleys, diverting water from Stream A, and increasing the volume of water entering Appellant’s workings via Level X. The Court of Session refused the requested relief, and Appellant appealed to the House of Lords.

Legal Issues Presented

1. Whether, under the reservation clauses in the parties’ mineral leases, Respondent lawfully may use Level X and other existing waygates to discharge water from its mine, even if this diverts water from Stream A and increases inflow to Appellant’s mine.
2. Whether such diversion of surface and percolating water constitutes a legal wrong or merely damnum sine injuria.
3. Whether Appellant is entitled to interim or permanent interdict against Respondent’s mining operations.

Arguments of the Parties

Appellant’s Arguments

• Respondent had no right to cut through the natural barrier between Valley A and Valley B.
• Respondent unlawfully reduced Appellant’s supply of water in Stream A, essential to Appellant’s mining operations.
• Channeling water from Valley A through Level X into Valley B violated Appellant’s lease rights.
• Use of Level X within Appellant’s liberties to carry additional water impeded Appellant’s mining works.
• The Court below misapplied the law, relied on unproven facts, and should have granted at least an interim interdict.

Respondent’s Arguments

• Level X is a common drain expressly reserved for the use of both lessees; Respondent may employ it without limitation for ordinary mining purposes.
• Appellant cannot restrict lawful mining within Respondent’s own liberties merely because water might be diverted from Stream A.
• Longstanding use of Level X confirms Respondent’s right to continue those operations.
• The 1817 agreement, accepted by Appellant, specifically contemplated the disputed works, barring Appellant’s objections.

Table of Precedents Cited

Court’s Reasoning and Analysis

Judge Campbell stated that the sole arguable point was construction of the reservation clause in both leases. The clause reserves to Landlord and other tenants “the use of all shafts, sumpts, cuts, levels, drifts, or other waygates… with power of sinking and driving within the said whole grounds… in so far as the same can be done without incommoding” the other lessee.

• The qualifying phrase “in so far as the same can be done without incommoding” grammatically applies only to the “power of sinking and driving,” not to “the use” of existing levels and waygates. Reading it otherwise would nullify the reservation because any drainage inevitably inconveniences the lower mine.
• Respondent’s operations were within its lease area, customary in mining, and conducted without negligence or bad faith.
• Stream B (formerly the Katystake Linn level) was an artificial conduit created by Respondent; Respondent could lawfully obstruct or alter it. Under Scottish and English law, diversion of artificial or percolating water is merely damnum sine injuria.
• Because neither lease created a servitude in favour of the other, each lessee may exploit its mine “in the manner most beneficial to itself,” even if the natural consequence is prejudice to the adjoining mine.

Judges Brougham and Cranworth concurred, emphasising that the dispute turned on a narrow grammatical point and agreeing that the language of the reservation unambiguously favoured Respondent. Judge Wensleydale did not deliver a substantive opinion, having missed part of the argument.

Holding and Implications

Appeal dismissed; interlocutors affirmed; costs awarded against Appellant.

The House of Lords confirmed that, absent an express servitude, each mine owner may pursue ordinary mining operations within its own boundaries, even when those operations divert water or increase drainage to the detriment of neighbouring workings. The judgment clarifies the interpretation of reservation clauses in Scottish mineral leases and reinforces the principle of damnum sine injuria concerning subterranean and artificially diverted water. The decision directly affects the parties but sets no new precedent, instead reaffirming established doctrine for future mineral-lease disputes.