This is an action for injuries to land alleged to have resulted from the negligent manner in which the defendant changed the structure of its road bed; it is alleged that the defendant originally constructed its road with sufficient openings, but that in the fall of 1889 it made a change, substituting a solid embankment for a trestle, and thereby encroached upon the channel of Cache river and adjacent sloug’hs so as to obstruct the flow of water through them, and cause it to flow back on plaintiff’s land; that during the following' winter his land was by this means overflowed, and the planting of a crop that year prevented ; and that the market value of the land was destroyed by reason of its liability to overflow.
The facts are not distinctly alleged, but upon a liberal construction it may be said that they sufficiently appear from the complaint.
The answer denied the negligence charged, or that the plaintiff had been injured by the change in the road bed.
1. The first matter presented as a ground for reversal is the courffs action in the admission of evidence. The plaintiff was introduced as a witness, and testified that Cypress slough was about a mile and a half from his land ; that where it crossed the defendant’s road its channel was about a quarter of a mile wide, and originally the road had been constructed across it upon an open trestle; that in the fall of 1889 the defendant removed the trestle, and made a solid embankment, except for a distance of one hundred feet; that in the following winter plaintiff’s land was under water that seemed to be backed up the slough from the railroad; that he was not at the opening' of the slough or its crossing of the railroad during the overflow. Thereupon the following question was propounded : 1 ‘ From your knowledge of the country and of the water carried, by *394Cypress sloug'h in times of ordinary high water, do you think the openings sufficient to carry off the waters in times of ordinary flood?” The question was objected to by the defendant, but the objection was overruled, and the witness testified that he thought the opening was not sufficient. He did not testify as an expert, nor was his opinion asked of a matter determinable by conditions he had seen and described, but could not accurately portray. But it was assumed that he knew the trend of the country and the volume of water discharged by Cypress slough, and upon that, basis he was asked whether an opening*, which he had said was one hundred feet wide, would furnish a sufficient vent for the water. We are of opinion that the question called for an answer requiring special knowledge and skill, and could not properly be answered by a non-expert.
*393 i. Admissií°n of?ion?expert.
*394 2. Duty of railway to leave outlet for watercourse.
2. The next ground relied upon is that the court erred in giving the second, third, fourth and seventh instructions upon its own motion, and in refusing to give the first, second, third and fourth asked on behalf of defendant. The reporter will embody the instructions in his statement of the case, and we will consider the objections urged to the court’s action with regard to them without setting them out. The objection to the fourth of the instructions given by the court upon its own motion is thus set out in the defendant’s brief : “It states that, thoug'h the flood might be extraordinary, still if it mig-ht, by the use of ordinary care, have been anticipated and guarded against (by the defendant), then the defendant would be liable for damages ’ ’ to plaintiff caused by a failure to leave sufficient openings. And, continuing, it insists that ‘ ‘ the law only requires that the openings where the bed of a stream crosses its tracks be sufficient to pass ordinary freshets.” The law exacts ordinary dilig*ence, and makes a failure to exercise it actionable. If the defendant could reasonably have foreseen the com*395ing of extraordinary freshets, and could reasonably have so constructed its bed as to permit their floods to pass without damage to upper proprietors, the duty of diligence exacted it; but if such freshets could not reasonably have been anticipated, or if the passage of their floods could not have been provided for by the exercise of reasonable care, the duty of diligence did not require it. Of this the jury were fully advised by the instruction, which, instead of being subject to objection, contained a plain, correct and ample statement of the doctrine of ordinary diligence as applicable to the question of which it treats, and is supported by reason as well as the authorities. Cobb v. Smith, 38 Wis. 21; Mayor v. Bailey, 2 Denio, 433; Gulf etc. Ry. v. Pomeroy, 30 A. & E. Ry. Cas. 200; 2 Wood’s Railways, p. 875.
3. A like objection is urged to the second instruction, and the conclusion announced disposes of both. Our attention has been called to nothing in the third instruction as being, erroneous, and we assume that the objection to it was abandoned.
4. The first of the instructions refused was the converse of the fourth given, and should have been refused.
5. As much of the second, refused,' as correctly stated the law was embraced within the fifth, given.
6. The fourth embodies the vice of the first refused ; and, besides, seems to limit the duty of the defendant to so constructing its road across watercourses that they will carry off the water within their banks, but not surface water that had been used to find an outlet through them. If this is what was intended, it was erroneous. The statute authorizes the building of the road across watercourses, but requires that they be restored to their former state and usefulness (Mansf. Dig. sec. 5447, fifth paragraph; 2 Wood’s Ry. p. 874); and the requirement is not satisfied if the former capacity of the stream to carry off water — whether that falling within its banks *396or that flowing into them from the surface of the adjacent country — is impaired. Upon a somewhat similar contention it was ruled by this court that a railroad could not needlessly obstruct the flow of surface water, and that doing so was objectionable. Little Rock, etc. R. Co. v. Chapman, 39 Ark. 463.
*395 3_ Dul to |*orsurfaclelet
*396 4. Measure of damages by overflow.
7. That brings us to consider the seventh instruction given upon the court’s motion — the point of difficulty in the case. Stated generally, it defines as the measure of damages the difference between the values of the land just before and just after the openings were encroached upon, while the defendant insists that the correct measure was the depreciation in the value of its use. The aim of the law is to compensate the actual loss caused by the injury, and the damage should be so measured as tó accomplish this end. The rule that leads to that result is correct, and all others are wrong-. To determine what the loss is it is necessary to first ascertain the scope of the injury, for nothing can be accounted in the loss that does not arise from the injury. If all damages that may ever result from the nuisance are in law the result of its construction as an original wrong, then everj^thing that is a damage in legal contemplation, whether for past or prospective losses, is recoverable in one action ; but if the wrong be continuing, and the injuries successive, the damage done by each successive injury may be recovered in successive suits, and the injury to be compensated in the original suit is only the damag'e that has happened. St. Louis, etc. R. Co. v. Biggs, 52 Ark. 240; C. & O. Canal Co. v. Hitchings, 65 Me. 140; Pinney v. Berry, 61 Mo. 359; Wells v. New Haven, etc. Co. 151 Mass. 46.
The rule for determining whether a damag-e results from an original or continuing wrong was formulated by Judge Sandels in Biggs’ case, above cited, in his usually terse and perspicuous style. He says: ‘ ‘ Whenever the *397nuisance is of a permanent character, and its construction and continuance are necessarily an injury, the damage is original, and may be, at once, fully compensated. * * * But when such structure is permanent in its character, and its construction and continuance are not necessarily injurious, but may or may not be so, the injury to be compensated in a suit is only the damage that has happened; and there may be as many successive recoveries as there are successive injuries.” Upon the facts of that case, that were strikingly similar to those in this, it was held to come within the latter class, and a recovery was allowed for damage caused by overflowing a crop when it would have been barred by limitation if it had been occasioned by the original wrong. Upon the authority of that case, we hold that successive injuries from the wrong complained of in this would not be attributable to the original, but to a continuing, wrong, and that the damage recoverable would be only what had happened when the action was brought.
That brings us to the question, what comprised the damage that had happened ? or, stating it as applicable to the objection made to the instruction, was the depreciation in the value of the land, resulting from its liability to overflow, an element of past damage ?
In the case of Pinney v. Berry, 61 Mo. 359, the court considered the correctness of the rule, announced in the instruction under consideration, as applicable to this class of cases ; and 'Judge Napton, for the court, says : “It is obvious that this rule has no application to such nuisances as may be removed the day after the verdict, or for the continuance of which a second or third action may be maintained, or which may be abated at the instance of the injured party, by the order of a competent court. The plaintiff is only entitled to compensation for the loss actually sustained prior to the suit, by the nuisance.” The rule approved was that the *398damages were the loss to the rental value of the land, not to its salable value as an absolute estate, caused by the nuisance. To the same effect are a number of authorities. Battishill v. Reed, 86 Eng. C. L. 696; Troy v. Cheshire R. R. 3 Foster (N. H.), 83; Uline v. Ry. 101 N. Y. 98; Schlitz Brewing Co. v. Compton, 36 C. L. J. 110; S. C. 32 N. E. Rep. 693; Bare v. Hoffman, 79 Pa. St. 71; 3 Suth. Dam. sec. 1039; 5 A. & E. Enc. L. pp. 16, 17 and note.
It was not claimed in this case that any part of the depreciation arose from damage to the soil; the claim was that the land was liable to be overflowed on account of the insufficient openings in the road-bed, and that this liability depressed its market value. But the depreciation in value is not more permanent than its cause, and as the cause is removable in its nature, and the defendant is under a duty to remove it, a fact dependent upon its permanency cannot be treated in law as established; on the contrary, the presumption should be that the dutjr will be performed, especially since the continuance of the wrong may give rise to successive recoveries, and at last penal damages be awarded to enforce its performance. 5 Am. & Eng. Enc. p. 16 and cases cited, note 1, p. 17.
If, in this case, the plaintiff should recover for the depreciation claimed, he would be compensated as for a permanent damage to his estate ; and if the defendant should then do what it ought to do, abate the nuisance when the fact of nuisance is established, the value of the land would be restored, and the plaintiff would hold it, worth as much as ever, and have also the pay for its permanent damage. It may be that the defendant in good faith disputes the fact of nuisance; if so, justice to it demands that it be permitted to abate the nuisance as soon as the fact is established, and not be held for prospective losses that never happen.
*399The rule of allowing successive recoveries for successive injuries arising from a continuing wrong obviates such unjust results, and guards all interests of the land owner. Indeed, it is in the interest of the land owner, since it renders possible an assessment of the damage after it is done and can be fully proved, and removes the danger of an inadequate award for want of proof.
We have said much of the depreciation in value of land arising from its liability to overflow; but it does not seem reasonable that there can in fact be.any very considerable depreciation from that cause. Por as the law furnishes a remedy to prevent damage thereby, and one also to redress it, even to the extent of awarding punitive damages, it cannot greatly depress, even temporarily, the market value of the estate.
As there was no direct injury to the soil in the nature of waste, we think the measure of damages was the .injury to the use or depreciation in the rental value of the land; and it follows that the instruction was erroneous. It is argued that, as the same instruction was approved in the case of St. Louis, etc. R. Co. v. Morris, 35 Ark. 622, it was properly given in this ; but the facts of that case brought it within the first class as defined in Biggs’ case, the nuisance being permanent and necessarily injurious, and all damag'es being regarded as original. It appears from the„proof in this case that the nuisance was not necessarily permanent, since the road was operated for years free from it; and that if injury to plaintiff’s land might reasonably be apprehended, it was not a necessary result of the construction or continuance of the nuisance. Although the instruction was approved in Morris’ case, that case is not applicable to this.
Por the errors in admitting the improper evidence, and giving the seventh instruction, the judgment is reversed, and the cause remanded.