*726 Opinion
This is an appeal by defendant County of Los Angeles (County) and defendant Gibco Construction, Inc. (Gibco) from a judgment of the Superior Court of Los Angeles County in favor of plaintiff and against defendants. The action was brought by plaintiff, as an owner of real property, against defendants for damages caused by surface waters and mud draining across and onto plaintiff’s property and into the drainage ditch on plaintiff’s property from the land and streets owned by the defendants; for an injunction ordering defendants to refrain from draining surface waters across plaintiff’s land; and for an injunction ordering defendants to take corrective steps to prevent the draining of surface waters onto plaintiff’s land and in plaintiff’s drainage ditch in excess of the existing prescriptive rights of defendants. After a court trial, plaintiff was awarded $50 in damages against both defendants, 1 and the court issued the following injunction: “Defendants Gibco Construction, Inc., a corporation, and County of Los Angeles, and each of them, are enjoined from in any manner discharging onto the real property of Plaintiff or within the ditch located upon Plaintiff’s property, in excess of Defendants’ existing prescriptive rights, the surface waters which collect from time to time on said Defendants’ lands, walks, curbs, drives, gutters and streets, and further, said Defendants, and each of them, are hereby ordered, directed and required to take corrective steps within 240 days hereto to prevent the said draining of surface waters onto Plaintiff’s land and upon and in Plaintiff’s ditch in excess of Defendants’ existing prescriptive rights.”
Plaintiff has owned and resided on the real property known as 396 East Mendocino Street in Altadena, California since 1952, Prior to March 1965, the property located across the street from plaintiff was higher and unimproved land. In March of 1965, defendant Gibco commenced construction of a subdivision on the property, then known as Tract No. 29892. The property was cleared of trees and brush in March of 1965, and grading was commenced during the months of April and May 1965. Plans for the subdivision were prepared by engineers employed by defendant Gibco, and were approved by defendant County. Contained in the plans were two one-block-long streets: Deodara (running east and west) and Oliveras (running north and south)..After they had been completed and had passed final inspection, they were dedicated as public highways and accepted by defendant County “for all public purposes and liability attaching thereto.” Due to this construction, the natural area available for absorption of surface waters on the tract was reduced by 51.4 percent. This reduction, combined *727 with the design of Oliveras and Deodara Streets, created an increased and different pattern of surface-flow from the tract, concentrating the run-off to and down Oliveras, which dead-ended at its intersection with Mendocino immediately north of plaintiff’s easterly driveway apron. Prior to November 1965, plaintiff had experienced no flow of surface water onto his property from across the street. In various rainstorms between 1965 and December 1966, water and mud from the tract flowed onto and flooded plaintiff’s property, via the overflow from Oliveras, across Mendocino and down the driveway on the east side of plaintiff’s property, as well as mud and water from the tract being deposited in the drainage ditch on the west side of his land. Plaintiff made several complaints to the County and Gibco, but neither defendant took any steps to alleviate the problem of water and mu°d flowing from the tract.
On this appeal from the judgment, defendants raise five contentions: (1) the plaintiff did not act reasonably in protecting his property; (2) the injunction is vague, confusing, and incapable of being carried out; (3) an injunction does not lie where plaintiff has only suffered nominal damages; (4) plaintiff’s drainage ditch is a natural watercourse and defendants may properly discharge surface waters into it; (5) by statute, defendant County is immune from liability in this case.
California courts follow a modified rule of civil law in determining the rights and liabilities of adjoining landowners with respect to the flow of surface waters.
2
As stated in
Keys
v.
Romley,
Here, defendants argue that plaintiff failed to take any reasonable precautions to protect his property from the flow of water and mud. The trial court expressly rejected this contention.
4
Assuming that the rule of
Keys
is applicable here, unless there is no substantial evidence to support this finding, we are bound by the decision of the trial court.
(Mantonya
v.
Bratlie,
Defendants contend that plaintiff acted unreasonably because he failed to take any affirmative action to protect his property and never consulted
*729
any person or firm with respect to alterations in his property which might protect it from the flow of surface waters. Defendants would have us read Keys as necessarily requiring affirmative action on the part of a lower landowner before he can complain of unreasonable surface water diversion by an upper landowner. However, such an interpretation of
Keys
would in many instances place an unreasonable burden on the lower landowner. All that he is required to do is act reasonably.
Keys
recognizes that, “New Jersey, which had been one of the pioneers in adopting the common enemy doctrine and had applied it with considerable strictness, abandoned the old rule in
Armstrong
v.
Francis Corp.
(1956)
The companion case of
Keys
is
Pagliotti
v.
Acquistapace,
The person who
may
minimize damage and fails to do so cannot recover for the excess damage occurring.
6
On the other hand, a person who reasonably acts to minimize the damage should recover the costs of such “minimization” as damages. Where, however, the iniured person acts reasonably, by action to minimize the damage, or by inaction which does not unreasonably
increase
his damages, if there is a diminution in the value of his land also involved, we see no reason why he may not recover for the damage. This same rationale is expressed in
Inns
v.
San Juan Unified School Dist., supra,
The case of
Armstrong
v.
Francis Corp., supra,
Upon an examination of the record, we have determined that there is substantial evidence to support a finding that plaintiff acted reasonably in relation to his property.
8
So far as the County is concerned, however, we conclude that the increased use of plaintiff’s ditch, as a result of the improvement, is in the nature of inverse condemnation (Code Civ. Proc., § 1238);
9
that the County is not, as a matter of law, prohibited from increasing a servitude if such increase is without unreasonable damage to the owner of the servient estate and compensation for any diminution in the property’s value is paid by the County.
(Granone
v.
County of Los Angeles,
Defendant County’s liability for inverse condemnation is predicated upon article I, section 14 of the California Constitution, which provides that “[p]rivate property shall not be taken or damaged for public use without just compensation having first been made to . . . the owner. ...” “ ‘Inverse condemnation’ is the name generally ascribed to the remedy which a property owner is permitted to prosecute to obtain the just compensation which the Constitution assures him when his property without prior payment therefor, has been taken or damaged for public use.” (Van Alstyne, Inverse Condemnation, supra, at page 730.)
In
Albers
v.
County of Los Angeles,
*733
It is not clear whether, by holding that the landowner could recover whether or not the damage to his land was a foreseeable consequence of the public improvement, the court in
Albers
impliedly disapproved earlier cases reaching a contrary result. (See, e.g.,
Bauer
v.
County of Ventura,
Citing
Bauer
v.
County of Ventura, supra,
and
Granone
v.
County of Los Angeles, supra,
The case of
Frustuck
v.
City of Fairfax, supra,
involved a situation factually similar to that presently before us. There, the development and improvement of higher lands resulted in an increase in the flowage of surface waters which naturally drained across plaintiff’s lower property. These improvements diverted the storm waters from their natural channels in such a manner that the additional water could not be handled by the existing 20-inch culvert which ran beneath the street to a ditch located on plaintiff’s property. The excess water overflowed onto plaintiff’s land. To alleviate this condition, the
City
enlarged the culvert carrying the waters to the plaintiff’s ditch. The result was a flow of water which could not be handled by the ditch, and flooding occurred. The court found that there was created an increased burden to plaintiff’s property, constituting inverse condemnation. The court stated (pp. 362-363): “The liability of the City is not necessarily predicated upon the doing by it of the actual physical act of diversion. The basis of liability is its failure, in the exercise of its governmental power, to appreciate the probability that the drainage system from Marinda Oaks to the Frustuck property, functioning as deliberately conceived, and as altered and maintained by the diversion of waters from their normal channels, would result in some damage to private property.
(Youngblood
v.
Los Angeles County Flood Control Dist., supra,
Gibco’s liability, however, is a different question. In the absence of something in the nature of a protective covenant, where a public entity approves the plans for a subdivision, including a drainage system, and there is damage to adjacent property as a result of those improvements, the public entity, not the subdivider, is liable in an inverse condemnation suit.
(Eachus
v.
City of Los Angeles,
The whole of the injunction goes to the manner of discharging waters, none of which are within the control of defendant Gibco. We do not say that a prohibitory injunction against active negligence on the part of Gibco to the extent it may still have property interests in the tract would not be proper. This, however, is not the purport of the injunction as ordered. As we have heretofore noted in footnote 1, there has been a waiver of appeal by Gibco from that portion of the judgment relative to the damage award of $50. There is no evidence of negligent conduct by Gibco con
*736
tributing to or causing the water or mud flow other than would naturally result from the terrain alteration and the concentration of the surface waters into the streets. We can readily envisage a situation where a subdivider, during development of the property, may have a duty to prevent ground erosion and the depositing of soil or debris on the land of the lower owner. It would seem reasonable to require a subdivider to take preventive measures to preclude such incidents, and nothing we say here negates responsibility for such negligence, but that is not encompassed in the problem now before us. What the facts here establish is that the surface waters’ run-off was increased in volume, and was directed and concentrated into the public street in the expected fashion occasioned by the approved subdivision plan. Thus, the diversion in question, so far as Gibco was concerned, was only the drainage of surface waters by an abutting property owner into a public street. As was stated in
Portman
v.
Clementina Co.,
For that reason, inverse condemnation is an accomplished fact as to any diminution in value of plaintiff’s property caused by the additional burden placed on the ditch, and an injunction will not lie where the damage to plaintiff is not unreasonable under the propriety of the improvement. (Cf.
Hassell
v.
City & County of San Francisco,
There have been cases wherein injunctions, both mandatory and prohibitory, have issued. One such case
(Robinson
v.
County of San Diego,
We note that those cases in which an injunction has issued were decided before
Spaulding
v.
Cameron,
*739
In the instant case, the injunction is proper as it relates to the over-crown run-off, and a mandatory injunction could issue ordering the County to cease engaging in such acts of negligence in the maintenance of the inadequate drainage system. In
Hayashi
v.
Alameda County Flood Control,
Inverse condemnation does not involve ordinary negligence, but rather, damages which are a natural consequence of the public improvement.
(Western Salt Co.
v.
City of Newport Beach,
While plaintiff did not specifically allege that his property had been taken or damaged for a public purpose and therefore inversely condemned, his first amended complaint did allege facts which would support a cause of action for inverse condemnation. The pleading alleges that *740 defendant County allowed the construction of a subdivision on the land above his property; that defendant County allowed the construction of and accepted the streets on said land; that said construction reduced the natural drainage area on said land, causing substantial amounts of surface water to be discharged onto his property and overload his drainage ditch; and that these surface waters continue to be discharged onto his land. These facts, if true, constitute a taking by way of damage to plaintiff’s land and for a public purpose. Adequate and timely notice and demand are alleged. Thus, a cause of action in inverse condemnation is substantially set forth, though subject to improvement by amended pleading.
Defendants contend on appeal that plaintiff’s drainage ditch is a natural water course. However, neither defendant raised this theory until defendant County argued it in its Points and Authorities dated November 1, 1967. Neither defendant set forth in any pleading any allegation that the ditch was a natural water course. Neither defendant requested or moved to conform any pleading to any evidence concerning the issue of a natural water course. On March 3, 1967, plaintiff, in his proposed findings of fact, included a finding that the drainage ditch was not and had never been a natural water course. The defendants objected to this proposed finding on the ground it was unnecessary, and the court deleted it, indicating that the proposed finding concerning defendants’ prescriptive rights covered the point. Defendants did not request a special finding on the issue of a natural water course. The defendants may not now complain on appeal of defects in the court’s findings for which they are responsible.
(Fontana
v.
Upp,
However, on the evidence in the case before us, we would conclude that defendants’ arguments would fail on the merits. Pursuant to exception (2) set forth in
Albers,
the County correctly argues that an upper landowner may discharge surface waters into a natural water course and increase its volume without subjecting itself to liability for any damage suffered by a lower landowner, even if the stream channel is inadequate to accommodate the increased flow.
(Archer
v.
City of Los Angeles, supra,
We have heretofore discussed the right of the County to increase the burden upon the ditch, provided recompense for diminution of value, if any, is paid under the theory of inverse condemnation. Plaintiff’s complaint, however, goes beyond the problem of excess water in his ditch. His complaint is that the water races down the new street, across Mendo-. ciño, and down his driveway, flooding across his yard, depositing debris, as well as causing erosion. We are therefore not confronted with the narrow problem of increased waters through the ditch, as the County would suggest. It may be that one means of reducing the plaintiff’s damage would be to adequately corral the waters so as to funnel them through the ditch, but this is not the sole problem presented on this appeal. Likewise, it is no defense that, on afterthought, the County conceived of a preventive measure which might have been taken by plaintiff but was not, if plaintiff’s not having foreseen the preventive measure was not unreasonable. Also, where the preventive measure is one which might reasonably be expected to be taken by the County, its failure to take such precaution goes directly to the unreasonableness of its actions. In the instant case, the County suggests that a grate and drain could have been constructed by plaintiff at his driveway apron to funnel the waters across his land to the drainage ditch. While this may be a possible solution, it goes more to the damage occasioned by the introduction of the waters onto plaintiff’s property than to the issue of reasonable or unreasonable action by plaintiff. (Frustuck v. City of Fairfax, supra, pp. 368-369.) Certainly, whatever plaintiff must erect on his property, he is entitled to both the cost of such erection and the damage caused by the burden requiring such protective structures. As the court in Albers observed (at pp. 269-273): “On the issue now before us the general rule is that an owner whose property *742 is being taken or damaged by a public entity is under a duty to take all reasonable steps available to minimize his loss. (18 Am.Jur., Eminent Domain, § 262, p. 903; 29 C.J.S., Eminent Domain, § 155, p. 1015, fn. 69; 4 Nichols on Eminent Domain (3d ed. 1962) § 14.22, p. 525.) . . .
“No reason appears why the rule in California should be harsher than that of our sister states. No overriding public policy demands that in eminent domain proceedings in California the owner of property be denied recovery for expenses reasonably and in good faith incurred in an effort to minimize his loss [fn. omitted]. On the contrary, it. would seem that the public interest would be served by allowing the possibility of such a recovery: the owner, who is ordinarily in the best position to learn of and guard against danger to his property, would thereby be encouraged to attempt to minimize the loss inflicted on him by the condemnation, rather than simply to sit idly by and watch otherwise avoidable damages accumulate. To the extent that the loss is minimized, of course, the amount of the public entity’s liability to the owner is reduced; and adequate protection for the public entity would seem to be provided by the requirements of good faith and reasonableness (see
Zidel
v.
State
(Ct. Cl. 1949)
supra,
“If, in accordance with the general rule and the dictates of public policy, the duty to mitigate damages is held to apply in eminent domain cases, the fair market value of the property taken or damaged will be decreased by the amount which the owners reasonably and in good faith spend in discharging that duty. Such amount can usually be determined with precision, as it was in the case before us. It is therefore unnecessary to draw a technical distinction between designating this amount as a separate item of damages or merely placing it on the debit side in computing the fair market value of the property after the taking; in either event the result will be the same.”
The suggestion of the County above discussed might have been a solution to the problem; nevertheless, the obligation to prevent future damage from the County’s maintenance of its negligently constructed street was that of the County. The burden is on the County to construct its streets in such manner as to accomplish the purpose for which they were intended. This includes providing the road with such crown or pitch as to divert the oncoming surface waters in the direction intended. If the approved design fails to meet the purpose for which it was created and the condition of the street results in causing damage, its maintenance in such condition may be enjoined, for the resultant damage is not “for the public use.”
The issuance of the injunction, so far as it relates to the use of the ditch, *743 while erroneous and requiring reversal, was a clear attempt by the trial court to provide relief to plaintiff for the damage he has been occasioned. Though that remedy cannot be affirmed, the determination of liability need not be disturbed so far as defendant County is concerned. So far as the injunction related to over-crown run-off, the injunctive relief is affirmed.
As to defendant County, the judgment is reversed as to the relief sought to be granted as to any increased use of the ditch for water diversion purposes only, and the case is remanded to the trial court on the issue of damages only, in conformity with this opinion.
As to defendant Gibco, the judgment is reversed as to both liability and damages.
Aiso, J., and Reppy, J., concurred.
The petition of the appellant County for a hearing by the Supreme Court was denied March 19,1970.
Notes
At time of argument on appeal, both defendants waived appeal as to this portion of the judgment.
For a general discussion of surface waters and the civil law rule relating thereto, see 52 Cal.Jur.2d, § 723 et seq., Waters, p. 364; also, as what appears to have been a forerunner of
Keys
v.
Romley,
The text of 1 Cal.Jur.2d, § 5, Adjoining Landowners, 732-733 is of particular interest. There it is noted that California has adopted the rule of the civil law as it relates to surface waters. (Since the text was written
pre-Keys
and
pre-Pagliotti
v.
Acquistapace,
We note that there is nothing in Burrows which suggests that Keys does other than modify the civil law rule relating to the diversion of surface waters, the result of which affected recoverable damages. Keys does not create a new or different cause of action, but does recognize that the absolute liability resulting from strict application of the civil law as to surface waters was unreasonable. Under the facts of that case, the court held that where an upper owner diverts surface waters in such manner as to do no damage to the lower owner because of the actual, though not natural, contours of the lower property, the lower owner may not necessarily recover for injury caused by his subsequent modification of the terrain, thus permitting the diverted waters to invade his property. It leaves open the question of whether the subsequent terrain modification was reasonable, as weighed against the upper owner’s reliance upon the existent conditions.
The rejection by the court of this contention is the finding of reasonableness on the part of plaintiff. It may be based upon reasonable inaction, as well as affirihative action.
The language used in Keys is as follows: “The gravity of harm is its seriousness from an objective viewpoint, while the utility of conduct is its meritoriousness from the same viewpoint. (Rest., Torts, § 826.) If the weight is on the side of him who alters the natural course, then he has acted reasonably and without liability; if the harm to the lower landowner is unreasonably severe, then the economic costs incident to expulsion of surface waters must be borne by the upper owner whose devlopment caused the damage.” This must be read in the context of the facts then before the court. To hold otherwise would give a private upper landowner an absolute right to impose burdens upon the land of a lower owner by merely paying for the damages incurred. This would eliminate injunctive relief where the upper owner is acting unreasonably. Certainly this was not the court’s holding.
This result answers the query posed in Burrows, supra, by footnote 3, where the court said: “It is not clear from Keys whether the Supreme Court left room for the fourth possible permutation, namely, a situation where both are unreasonable.”
For general discussions of the conflicting rules relating to surface water disputes, see 39 So.Cal.L.Rev. 128, Comment, California Surface Waters; 17 Hastings L.J. 826, Note, California Surface Waters; and Witkin, Summary of Cal. Law (1969 Supp.), § 328 A, Real Property.
While a lower landowner’s failure to take affirmative action to protect his property does not necessarily mean he is denied relief against the upper landowner, his lack of action may be relevant in computing the damages to 'which he is entitled. (See also fn. 6 herein, p. 730.)
The question of damages for which Gibco may be liable is discussed infra, beginning on page 735.
For discussions of the impact of the Albers decision, see Note, Inverse Condemnation, Foreseeability Abandoned in California: Albers v. County of Los Angeles, 13 U.C.L.A. L.Rev. 871; Note, Government Subdivisions Liable for Unforeseen Damagings Under California Inverse Condemnation Law, 17 Stan.L.Rev. 763; Witkin, Summary of Cal. Law (1969 Supp.) Constitutional Law, § 212 A.
“See Bauer
v.
County of Ventura,
“Bauer
v.
County of Ventura, supra,
note 287, at p. 286,
“Judicial action in the area of inverse condemnation has not been entirely satisfactory; most authorities readily acknowledge that the case law is disorderly, incon *739 sistent, and diffuse. [Footnote omitted.]” (Van Alstyne, Inverse Condemnation, supra, p. 732.)
