OPINION OF THE COURT
Aрpellant, Sunbeam Coal Corporation, appeals by allowance Superior Court’s order reversing Butler County Com
*195
mon Pleas.
Appellees, Glenn and Virginia Hutchison, are the owners of 85 acres of land in Oakland Township, Butler County. On December 14, 1976, they executed an “Option and Lease Agreement” with appellant Sunbeam Coal Corporation. The agreement provided, inter alia, for the payment of minimum advance royalties for at least three years should Sunbeam choose not to actively engage in the extraction of coal from the demised property. The parties differ over whether the three year term is a minimum term during which appellant coal company cannot terminate without payment of royalties or a maximum term during which the lease will continue in the absence of mining. In the event mining operations should commence, the agreement provides that Sunbeam is to pay to the landowner royalties in the amount of one ($1.00) dollar per net ton (2,000 pounds) of coal removed. The agreement gave the coal company an option to enter into a lease for the purpose of extracting the coal in place under appellees’ land pursuant to terms and conditions also set forth in the December 14, 1976 agree *196 ment. Appellant made a timely exercise of its option on June 1, 1977 and began paying minimum royalties on September 1, 1977. The Hutchisons received and cashed minimum advаnce royalty checks covering royalties due through December, 1979, three years after the signing of the document. 2 Contending the lease had then expired, the landowners refused minimum advance royalty checks tendered after January of 1980 because no mining had begun.
Appellees then sought declaratory relief, pursuant to the Declaratory Judgments Act, 42 Pa.C.S. §§ 7531-7541, and asked Butler County Common Pleas to declare that the lease had terminated three years after the execution of the document. Appellee Glenn Hutchison, Homer Rodgers, leasing agent for the Sunbeam Coal Corporation, and Attorney Leo Stepanian, drafter of the lease for Sunbeam, all testified before Common Pleas as to the meaning of the document and the circumstances attendant to its execution. The court examined the lease and stated that appellee Hutchison had simply misinterpreted the express provisions of the lease. It held that as long as Sunbeam tendered minimum advance royalty payments the lease would continue. Superior Court reversed. We granted a рetition for allowance of appeal to resolve the debate surrounding the terms of the lease and to examine the Superior Court decision in
Frenchak v. Sunbeam Coal Corp.,
344 Pa.Supe
*197
rior Ct. 37,
The
Frenchak v. Sunbeam Coal Corp.
decision, upon which Superior Court relied in the instant case, interpreted a lease document with the same languаge as the one here to give rise to a forfeiture favoring the landowner. Citing the landowner’s inability to develop the demised property when burdened with a mineral lease, and the “stop-gap” nature of minimum advance royalties, the court held that “the law will imply a duty to mine, even in the face of minimum advance royalties.” 344 Pa.Superior Ct. at 42,
In coal mining leases, where the consideration for the privilege of removing the mineral is a royalty on the amount extractеd, it is common for the parties to stipulate that a minimum advance royalty will be paid to the landowner if no mining is done.
See generally Lacoe v. Lehigh Valley Coal Co.,
The law will not imply a different contract than that which the parties have expressly adopted. To imply covenants on matters specifically addressed in the contract itself would violate this doctrine.
Greek v. Wylie,
Alternately, Superior Court’s opinion seems to imply that this particular lease is properly interpreted as a lease for a maximum term of three years in the absence of mining. Therefore, our rejection of that court’s rationale based on an implied covenant to mine does not relieve us of our obligation to examine the terms of this particular agreement to determine whether the three year period limits only the coal company’s obligation to pay minimum advance royalties, or, conversely, the term of the lease, in the absence of mining operations. The lease provides that the coal operator shall have 180 days after the execution of the document to exercise his option to lease the land. The coal operator also covenants it will commence mining within 90 days after the exercise of the option to lease and, in the event mining does not begin, the coal cоmpany agrees to pay the landowner $420.00 per year in minimum advance royalties. Paragraph five, the controverted provision, states:
5. This lease shall continue for a period of 3 years from the effective date hereof or until all the coal which the Coal Operator determines can be mined, removed and sold with economy and profit hаs been removed or so long as minimum advance royalties are being tendered by the Coal Operator. Coal Operator may remove all equipment, buildings and machinery from the premises at the end of the term provided no royalty is then due, or Coal Operator may leave the same on the premises for a period of six months at its option.
The lease is a standard typewritten form drafted by the coal company and apparently utilized by it in all similar dealings. In this particular paragraph the only term negotiated by the *200 parties is the provision for three years which was inserted in a blank left vacant on the form.
Paragraph five raises difficult problems of construction for a court attempting to discern the рarties’ intent as to the lease’s term when no mining operations have occurred. Appellant Sunbeam’s interpretation of the express language in paragraph five would grant it an estate in perpetuity, a fee simple in the mineral in place, not determinable so long as Sunbeam tenders minimum advance royalties to the landowner. The landowners сontend that such a construction would make the reference to three years a nullity. Superior Court determined that the lease provision contemplates termination upon the happening of any one of three conditions: the expiration of three years, the coal operator’s determination that continuation of coal mining is no lоnger financially expedient or the cessation of minimum advance royalties. We agree with the result reached by Superior Court, not because of any implied covenant to mine, but because the lease on its face is ambiguous as to its term and the other available evidence favors appellees’ interpretation.
A lease is a cоntract and is to be interpreted according to contract principles.
Pugh v. Holmes,
We first analyze the lease to determine whether an ambiguity exists requiring the use of extrinsic evidence. A contract is ambiguous if it is reasonably susceptible of different constructions and capable of being understood in more than one sense.
Metzger v. Clifford Realty Corp.,
327 Pa.Superior Ct. 377, 386,
In the case sub judice, paragraph five of the lеase could arguably be interpreted as appellant urges. So construed, the payment of $420.00 per year in minimum advance royalties would indefinitely extend the lease term. However, this interpretation brings the first measure of the term, three years, into conflict with the third, “so long as minimum royalties are paid.” Appellant’s argument that this conflict can be resolved by trеating the period in gross as merely a limitation on its obligation to pay minimum advance royalties is at best strained and rests wholly on the use of the word “or” to connect the series of events which describe the term. It is also inconsistent with the plain purpose of the paragraph in question, i.e., to describe and delimit the term of the lease, not the term during which minimum advance royalties should be paid. Alternatively, paragraph five can be interpreted to reflect the appellees’ construction that minimum advance royalties are to be paid, following the failure to commence mining within 90 days of the coal operator’s exercise of the option, but that the lease *202 expires three years after the оption is exercised unless mining has then begun. This interpretation is not totally consistent with the use of the word “or,” but seems more natural. In any event, since the provisions of paragraph five are reasonably susceptible to two interpretations, it is ambiguous and we must look at the extrinsic evidence. 5
So doing, we are persuaded, as a matter of interpretation, that the parties intended to limit the lease term to three years after the first payment of minimum advance royalties unless mining had commenced in the meantime. 6 Homer Rodgers, then leasing agent for Sunbeam Coal, *203 testified as follows about the circumstances surrounding the insertion of the three year term into the blank space in paragraph five:
Q. And is it correct to say in this case you told Mr. Hutchison that a five year tеrm was the normal term?
A. This is approximately what we do with all of them, approximately five.
Q. What was his response to that?
A. He would like to have it for three years.
Q. Then, what did you say?
A. I said that I would check with Sunbeam and see if we could do it on a three year period and which I did and came back and—
Q. Let me just interrupt you. When you checked with Sunbeam, who did you check with?
A. Mr. Harger.
Q. And what did you say to Mr. Harger about this blank space that needed to be filled in?
A. I said, “On paragraph five, Mr. Harger, can we go for a period of three years instead of five years on that?” Mr. Harger—
Q. What was his response?
A. He thought for a little bit and he said, “Yes, we can go for three years on that.”
N.T. February 9, 1983 at 31-32.
The need to consult with a superior at Sunbeam points strongly to the parties’ shared intent to treat the term in gross as a limit on the length of the demise to the coal company. If the lease could be extended in perpetuity through the payment of minimum advance royalties, there would be little need for the leasing agent, Mr. Rodgers, to seek approval before the insertion of a three year term in paragraph five.
The order of Superior Court is affirmed.
Notes
. The term "lease” is in some respеcts a misnomer. What is really involved is a transfer of an interest in real estate, the mineral in place.
Hummel
v.
McFadden,
. The document is ambiguous on its face as to when the threе year period begins and ends, whatever purpose that period serves. Paragraph 5 (quoted in its entirety infra, at 389) of the document states, "This lease shall continue for a period of 3 years from the effective date hereof.” The document itself is both a lease and an option. This leads to at least three possible interpretations of the phrasе "effective date hereof" (emphasis added): (a) the lease terminates December 14, 1976, three years after execution of the lease-option document; (b) the lease terminates June 1, 1980, three years after exercise of the option; (c) the lease terminates September 1, 1980, three years after paragraph three's grace period fоr commencement of mining ends. The parties have argued only the question of whether three years measures the term of the lease or the time during which appellant must pay royalties. Either way, it leaves the beginning and end of the stated period uncertain. We need not address this issue, however, as our affirming Superior Court’s holding that the lease term is only three yeаrs and not perpetual relieves us of the duty to construe the effective date of the lease term.
. This approach is followed in a number of jurisdictions.
Inman v. Milwhite,
. The parties to a mineral lease are free, of course, to bargain for a duty to mine in addition to the payment of minimum advance royalties.
See Chauvenet v. Person,
. The resolution of this matter implicates two well-settled rules of construction. First, in determining the intention of parties to a written contract, the writing must be construed against the party drafting the document.
Rusiski v. Pribonic,
. As noted
supra,
generally it is the court’s responsibility to determine the existence of an аmbiguity leaving the resolution of the ambiguity and the determination of the parties’ intent to the finder of fact. In this case, a hearing was held before Common Pleas where both parties proffered their interpretation of the lease agreement. However, in deciding that the lease is perpetual on the continued payment of minimum advance royalties, Cоmmon Pleas simply relied upon the express terms of the lease making no findings on the evidence adduced at the hearing. We need not remand this matter for further findings as the record is clear on these facts. An appellate court may draw its own inferences and arrive at its own conclusions when a finding of fact is simply a deduction from other facts and the ultimate fact in question is purely a result of reasoning.
Frowen v. Blank,
