Opinion by
This was an action of trespass, brought to recover damages for injuries alleged to have been caused to plaintiff’s property, by the defendant company. The plaintiff was the owner of a farm in Washington county, near the town of Donora, and the defendant company owned the underlying coal. During the process of mining, and by reason of its failure to leave proper support for the surface, the defendant company injured a portion of the surface for building purposes, interfered with the use of a private road, damaged the dwelling house, and destroyed certain springs of water.
The assignments of error relate solely to the measure of damages. The principal injury of which complaint was made, was the destruction of five springs of water. This injury was permanent and irremediable, as was also any damage to the surface which might render it less available for building purposes. Other injuries, such as the sinking of the dwelling house and
The first assignment of error complains of the admission of testimony as to the value of the springs -in themselves. This specification is sustained. The value of the springs was only an element in estimating the value of the realty. If the trespass resulted in permanent injury to the realty, the measure of damages is the diminution in the market value of the land. This principle is laid down in Schuylkill Nav. Co. v. Farr, 4 W. & S. 362, where it was held that the measure of damages is (p. 375), “the difference between what the property would have sold for as affected by the injury, and what it would have brought unaffected by such injury.” And in McKnight v. Ratcliff,
In Hanover Water Co. v. Iron Co.,
In Vanderslice v. Phila.,
The sound clear rule is stated in Seely v. Alden,
. It is suggested in tbe argument here, that the trial court considered the decisions of this court in Robb v. Carnegie,
In so far as the property of the plaintiff in this ease was permanently injured, the rule should have been applied.
The judgment is reversed and a venire facias de novo is awarded.
