PELLEGRINI, Judge.
Maple Creek Mining, Inc., (Maple Creek) appeals from an order of the Court of Common Pleas of Washington County (trial court) overruling its preliminary objections to the Pennsylvania Turnpike Commission’s (Turnpike Commission) Petition to Convene a Pennsylvania State Mining Commission.
Maple Creek owns a mine in Washington County, Pennsylvania, where it employs approximately 425 people engaged in the process of deep coal mining. Maple Creek transports coal from its mine to its coal processing plant and transports equipment, materials and supplies from mine to mine via underground tunnels. The Turnpike Commission plans to build a 17-mile expressway from Washington County to Jefferson Borough, Allegheny County, that will be known as the “Mon-Fayette Expressway” (MFX). The MFX will be built on property on which the Commonwealth owns the surface rights but which lies over portions of Maple Creek’s two main underground tunnels and mine. The portions of land over which the MFX is expected to be built are referred to as Sections 52F1 and 52F2.
Because the MFX was to be built over an operating coal mine, the Turnpike Commission filed a petition in the trial court to convene a State Mining Commission pursuant to Section 1 of what is commonly known as the State Mining Commission Act (SMC Act),1 to acquire support rights owned by Maple Creek to construct the MFX on Tract 52F1 and to request a determination of the necessary lateral and subjacent support. The Turnpike Commission alleged that the State Mining Commission had exclusive jurisdiction to determine the underlying coal to be left in place, the coal to be removed, the material, if any, to be substituted for the coal to be removed and the ability to assess damages.
Maple Creek filed preliminary objections to the petition alleging, inter alia, that the trial court had no jurisdiction over the Petition to Convene a State Mining Commission because a pending prior action at No. 94-2446 would determine where Section 52F1 of MFX was going to be located. Maple Creek also argued that the Petition to Convene the State Mining Commission was unconstitutional on its face, as well as violative of Article I, Section 10 of the Pennsylvania Constitution.2
Dismissing Maple Creek’s preliminary objections, the trial court held that the State Mining Commission has exclusive juris[1222]*1222diction to regulate the amount of coal to be left in place for vertical and lateral support, as well as damages relative to the support. It also rejected Maple Creek’s challenge to the constitutionality of the SMC Act, holding that rights of support and assessment of damages are expressly provided for under the SMC Act.3 Subsequently, Maple Creek sought to certify the order for appeal,4 the trial court granted certification and we accepted the appeal.5
As before the trial court, Maple Creek contends that the Turnpike Commission’s Petition to Convene a State Mining Commission should be denied because (1) without a prior proceeding instituted under the Eminent Domain Code - i.e., a declaration of taking or condemnation - the State Mining Commission cannot ascertain what support rights are necessary, and (2) the State Mining Commission has limited jurisdiction and authority to determine issues as to whether the construction of the MFX will cause destruction of the mine and environmental damage.6
Not only does it disagree with the substance of those objections, the Turnpike Commission argues that the issues raised by Maple Creek in its preliminary objections have already been determined in a prior action between the same parties so that the doctrine of collateral estoppel applies to bar relitigation of those issues. In ease No. 94-2446, Maple Creek filed an equity action before the trial court seeking to enjoin the construction of MFX at tracts 52F1 and 52F2. The Turnpike Commission filed preliminary objections to this action contending, inter alia, that the action should be dismissed because Maple Creek had to proceed either under the Eminent Domain Code7 and/or before the State Mining Commission. The trial court sustained the Turnpike Commission’s preliminary objections and dismissed the action. On appeal, by decision dated April 9, 1998, No. 2768 C.D.1997 (filed April 9, 1998) (Maple Creek I), we agreed with the trial court and affirmed, holding that whenever the Turnpike Commission acquired or intended to acquire land with underlying mineable coal, the State Mining Commission was empowered to investigate the matter and order the Turnpike Commission to do whatever was necessary to ensure the integrity of the mine.8
In order for collateral estoppel to apply, it must be shown, inter alia, that [1223]*1223there was a final judgment9 on the merits. C.D.G. Inc. v. Workers’ Compensation Appeal Board (McAllister), 702 A.2d 878 (Pa. Cmwlth.1997). In order for this doctrine to apply, not only must the judgment have been on the merits, but there also must have been adjudication on the merits. Veltri v. City of New Kensington, 144 Pa.Cmwlth. 121, 601 A.2d 392 (1991), petition for allowance of appeal denied, 580 Pa. 658, 608 A.2d 32 (1992). In Maple Creek I, however, the trial court sustained the preliminary objections filed by the Turnpike Commission and, because the resolution of that case was not a judgment or adjudication on the merits, the doctrine of collateral estoppel is inapplicable.10
As to the merits of this case, Maple Creek contends that the convening of the State Mining Commission was premature without a pending or final action under the Eminent Domain Code because an action pursuant to the Eminent Domain Code is a prerequisite to the exercise of jurisdiction by the State Mining Commission. Section 1 of the SMC Act, 52 P.S. § 1501, sets forth the responsibilities and authority of the State Mining Commission and provides in relevant part:
Whenever the Commonwealth has heretofore acquired or may hereafter acquire lands, easements or right of ways under-laid by minable coal, the State Mining Commission created in accordance with the provisions of this act upon application of the Commonwealth ... or the owner of the coal underlying such lands, ... is hereby empowered to determine, authorize, and direct the underlying or adjacent coal, if any, to be left in place for the purpose of furnishing vertical or lateral support to said land, easement or right of way, the underlying or adjacent coal, if any, which may be removed, and the material, if any, to be substituted for the coal so removed, together with the method and manner of placing such material in the mine workings, for the purpose of furnishing both vertical and lateral support to such land, easement or right of way and the party or parties by whom the expense thereof shall be paid.
This commission shall have exclusive jurisdiction of the mining of coal under lands, easements and right of ways purchased, condemned or otherwise acquired by the Commonwealth and judicial powers to hear and determine all evidence which may be presented; ...
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PELLEGRINI, Judge.
Maple Creek Mining, Inc., (Maple Creek) appeals from an order of the Court of Common Pleas of Washington County (trial court) overruling its preliminary objections to the Pennsylvania Turnpike Commission’s (Turnpike Commission) Petition to Convene a Pennsylvania State Mining Commission.
Maple Creek owns a mine in Washington County, Pennsylvania, where it employs approximately 425 people engaged in the process of deep coal mining. Maple Creek transports coal from its mine to its coal processing plant and transports equipment, materials and supplies from mine to mine via underground tunnels. The Turnpike Commission plans to build a 17-mile expressway from Washington County to Jefferson Borough, Allegheny County, that will be known as the “Mon-Fayette Expressway” (MFX). The MFX will be built on property on which the Commonwealth owns the surface rights but which lies over portions of Maple Creek’s two main underground tunnels and mine. The portions of land over which the MFX is expected to be built are referred to as Sections 52F1 and 52F2.
Because the MFX was to be built over an operating coal mine, the Turnpike Commission filed a petition in the trial court to convene a State Mining Commission pursuant to Section 1 of what is commonly known as the State Mining Commission Act (SMC Act),1 to acquire support rights owned by Maple Creek to construct the MFX on Tract 52F1 and to request a determination of the necessary lateral and subjacent support. The Turnpike Commission alleged that the State Mining Commission had exclusive jurisdiction to determine the underlying coal to be left in place, the coal to be removed, the material, if any, to be substituted for the coal to be removed and the ability to assess damages.
Maple Creek filed preliminary objections to the petition alleging, inter alia, that the trial court had no jurisdiction over the Petition to Convene a State Mining Commission because a pending prior action at No. 94-2446 would determine where Section 52F1 of MFX was going to be located. Maple Creek also argued that the Petition to Convene the State Mining Commission was unconstitutional on its face, as well as violative of Article I, Section 10 of the Pennsylvania Constitution.2
Dismissing Maple Creek’s preliminary objections, the trial court held that the State Mining Commission has exclusive juris[1222]*1222diction to regulate the amount of coal to be left in place for vertical and lateral support, as well as damages relative to the support. It also rejected Maple Creek’s challenge to the constitutionality of the SMC Act, holding that rights of support and assessment of damages are expressly provided for under the SMC Act.3 Subsequently, Maple Creek sought to certify the order for appeal,4 the trial court granted certification and we accepted the appeal.5
As before the trial court, Maple Creek contends that the Turnpike Commission’s Petition to Convene a State Mining Commission should be denied because (1) without a prior proceeding instituted under the Eminent Domain Code - i.e., a declaration of taking or condemnation - the State Mining Commission cannot ascertain what support rights are necessary, and (2) the State Mining Commission has limited jurisdiction and authority to determine issues as to whether the construction of the MFX will cause destruction of the mine and environmental damage.6
Not only does it disagree with the substance of those objections, the Turnpike Commission argues that the issues raised by Maple Creek in its preliminary objections have already been determined in a prior action between the same parties so that the doctrine of collateral estoppel applies to bar relitigation of those issues. In ease No. 94-2446, Maple Creek filed an equity action before the trial court seeking to enjoin the construction of MFX at tracts 52F1 and 52F2. The Turnpike Commission filed preliminary objections to this action contending, inter alia, that the action should be dismissed because Maple Creek had to proceed either under the Eminent Domain Code7 and/or before the State Mining Commission. The trial court sustained the Turnpike Commission’s preliminary objections and dismissed the action. On appeal, by decision dated April 9, 1998, No. 2768 C.D.1997 (filed April 9, 1998) (Maple Creek I), we agreed with the trial court and affirmed, holding that whenever the Turnpike Commission acquired or intended to acquire land with underlying mineable coal, the State Mining Commission was empowered to investigate the matter and order the Turnpike Commission to do whatever was necessary to ensure the integrity of the mine.8
In order for collateral estoppel to apply, it must be shown, inter alia, that [1223]*1223there was a final judgment9 on the merits. C.D.G. Inc. v. Workers’ Compensation Appeal Board (McAllister), 702 A.2d 878 (Pa. Cmwlth.1997). In order for this doctrine to apply, not only must the judgment have been on the merits, but there also must have been adjudication on the merits. Veltri v. City of New Kensington, 144 Pa.Cmwlth. 121, 601 A.2d 392 (1991), petition for allowance of appeal denied, 580 Pa. 658, 608 A.2d 32 (1992). In Maple Creek I, however, the trial court sustained the preliminary objections filed by the Turnpike Commission and, because the resolution of that case was not a judgment or adjudication on the merits, the doctrine of collateral estoppel is inapplicable.10
As to the merits of this case, Maple Creek contends that the convening of the State Mining Commission was premature without a pending or final action under the Eminent Domain Code because an action pursuant to the Eminent Domain Code is a prerequisite to the exercise of jurisdiction by the State Mining Commission. Section 1 of the SMC Act, 52 P.S. § 1501, sets forth the responsibilities and authority of the State Mining Commission and provides in relevant part:
Whenever the Commonwealth has heretofore acquired or may hereafter acquire lands, easements or right of ways under-laid by minable coal, the State Mining Commission created in accordance with the provisions of this act upon application of the Commonwealth ... or the owner of the coal underlying such lands, ... is hereby empowered to determine, authorize, and direct the underlying or adjacent coal, if any, to be left in place for the purpose of furnishing vertical or lateral support to said land, easement or right of way, the underlying or adjacent coal, if any, which may be removed, and the material, if any, to be substituted for the coal so removed, together with the method and manner of placing such material in the mine workings, for the purpose of furnishing both vertical and lateral support to such land, easement or right of way and the party or parties by whom the expense thereof shall be paid.
This commission shall have exclusive jurisdiction of the mining of coal under lands, easements and right of ways purchased, condemned or otherwise acquired by the Commonwealth and judicial powers to hear and determine all evidence which may be presented; ... to conduct such investigations as it may deem necessary; to make and enforce such orders, decrees and rules of procedure as it may deem advisable; to determine and assess damages, if any, for coal required by the said Commission to be left in place and benefits, if any, for improvements or better-ments; to allocate among the parties in interest the cost of its proceedings as well [1224]*1224as any work which it may order performed and to enforce its • orders and decrees through the court of common pleas of the county in which the lands, easements and right of ways purchased, condemned or otherwise acquired by the Commonwealth is situated. (Emphasis added).
Under this provision, the State Mining Commission is vested with the exclusive jurisdiction to determine mining of coal under lands and to make a determination of the value of coal under land taken for highway purposes. 52 P.S. § 1501; Williams v. Department of Highways, 423 Pa. 219, 223 A.2d 865 (1966). Moreover, nothing requires that a declaration of taking be filed for the State Mining Commission to exercise its jurisdiction, including the Eminent Domain Code, which specifically provides that nothing in it shall be deemed to affect, vary, alter or modify the jurisdiction or power of the State Mining Commission. 26 P.S. § 1-303.
In In re Appropriation and Taking of Lands of Moffat, 400 Pa. 123, 161 A.2d 352 (1960), when considering a petition to the State Mining Commission filed by an owner of coal to determine the amount of coal necessary to give lateral and vertical support to certain portions of the turnpike extension, our Supreme Court differentiated the jurisdiction of the board of viewers appointed pursuant to the Eminent Domain Code from that of the State Mining Commission when coal was involved as follows:
Generally speaking, the preliminary ap-praisement of damages resulting from the exercise of the right of eminent domain by the Commonwealth or its nominees is entrusted to a board of viewers. When coal is taken for the vertical and lateral support of lands, easements or rights-of-way of the Commonwealth, however, the legislature has chosen to set up a separate body to assess the resulting damages. This body, the State Mining Commission, is empowered under the Act to determine, inter alia, the amount of coal to be left in place for support purposes and to assess the damages suffered by the taking.
Id. at 127, 161 A.2d at 355.11 Where coal is taken to support lands, easements or rights of way, the State Mining Commission then has exclusive jurisdiction and the Eminent Domain Code is inapplicable.
Because the Turnpike Commission12 as owner of the surface rights under which the mineable coal owned by Maple Creek lies, properly petitioned to convene the State Mining Commission so that a determination as to the lateral and adjacent support could be rendered and damages assessed. Accordingly, the trial court properly determined that the State Mining Commission has jurisdiction to determine the underlying coal to be left in place, the coal to be removed, the material, if any, to be substituted for the coal to be removed and to assess damages. 52 P.S. § 1501; Williams v. Department of Highways, 423 Pa. 219, 223 A.2d 865 (1966).13
[1225]*1225Maple Creek also contends that because issues regarding destruction of its mine and the environmental consequences that may arise from the construction of the MFX are beyond the scope of the State Mining Commission’s authority, the trial court improperly granted the Turnpike Commission’s Petition.14 Assuming that the State Mining Commission did not have sufficient jurisdiction to answer all its concerns as suggested by Maple Creek, that does not mean that the Commission cannot exercise the jurisdiction that it does have to determine how much coal should be left in place for support and the value of that coal. We note, though, that the State Mining Commission will implicitly deal with the environmental and safety concerns because the catastrophic result Maple Creek alleges will only occur if the road collapses the mine. By determining the amount of coal needed to be left in place to support the MFX, the State Mining Commission will necessarily address that concern.15
Accordingly, because the State Mining Commission has jurisdiction to determine the amount of vertical and lateral support to be provided by coal underlying Section 52F1 of the MFX, the trial court properly dismissed Maple Creek’s preliminary objections to the Turnpike Commission’s Petition to Convene a State Mining Commission and its decision is affirmed.
ORDER
And now, this 6th day of July, 1998, the November 12, 1997 decision and order of the [1226]*1226Court of Common Pleas of Washington County, No. 97-2968, is affirmed.