Opinion
This is an appeal from a judgment enjoining the County of San Mateo from the collection of special assessments levied against certain property owners (plaintiffs) within the East Palo Alto-Belle Haven Storm Drain Assessment District, designated as Units I and II, and ordering a refund of assessments already collected.
The storm sewer special assessment was levied by the San Mateo Board of Supervisors (defendants) under the provisions of the Municipal Improvement Act of 1913, as amended (Sts. & Hy. Code, § 10000 et seq.) The amount of the assessment was calculated upon a rainfall runoff coefficient based wholly upon the zoning of the units in question. Two suits were consolidated, that of plaintiff Southern Pacific Transportation Company and a class action brought in behalf of property owners who had filed timely written protests to their individual assessments.
*856 The trial court declared void those assessments on the real property of members of the class on the ground that there was no substantial evidence that the property would obtain a special benefit from the proposed improvements. He further ruled that an invalid method of spreading the assessment was used and that the use of a flat zoning coefficient to measure special benefit without regard to the present use of the property is invalid as a matter of law. It is concluded that the defendants’ challenge of these findings is without merit.
The s.cope of the judgment is also attacked both by defendants and plaintiffs. The defendants argue that this is not a proper class action and that the court may only review the assessments of those people who filed written protests and also appeared to offer evidence at the hearing and must limit itself to grounds specified in the written protests. Plaintiffs argue that the judgment should declare void all assessments in the storm drain district. It is concluded that the plaintiffs’ solution must be accepted for reasons of equity.
We first turn to a contention raised by plaintiffs that the defendants’ appeal is now moot. On June 20, 1974, Judge Cohn in an action'entitled The City of Menlo Park v. The County of San Mateo, No. 17479, ruled that the City of Menlo Park is entitled to withdraw from the storm drain district upon certain conditions. As defendants’ attorney points out by letter, Judge Cohn’s decision relates only to Unit II and requires the City of Menlo Park to pay the county approximately $500,000 as a condition of withdrawing consent. Furthermore, defendants challenge the decision on its merits. The decision thus clearly does not render the appeal moot.
There is no disagreement between the parties that the power to specially assess property to pay for public improvements is based upon existence of a special benefit to the assessed property. The Supreme Court explained the basis of this principle in
Spring Street Co.
v.
City of Los Angeles
(1915)
*856 “Therefore, the compensating benefit to the property owner is the
*857
It is also clear that only a “special benefit” to the property assessed will justify an assessment, not merely “general benefit” inuring to the public as a whole.
(Roberts
v.
City of Los Angeles
(1936)
The trial court based its holding that the assessments were void on its conclusion that there was no substantial evidence of a special benefit to the protesting property owners and, further, that the formula upon which the assessments were based was an invalid method as a matter of law. The findings are related in that the validity of the formula will of necessity depend upon just what the special benefit is. To be specific, plaintiffs argue that when the public improvement to be built is a drainage project, uphill property may not be assessed at all or, at least, at a lower rate than the lower land. The several cases cited in support of this argument, however, all involve cases where the benefit was the prevention of flooding on the assessed land. (See, e.g.,
Honegger
v.
Reclamation Dist. No. 1619, supra,
In analyzing the propriety of the court’s decision, it is necessary first to identify the benefit which the public improvement will render; next, to determine if the property owners will receive a benefit different from that of the general public; and, finally, to ascertain if the formula on which the assessments are made is based on the benefit received.
*858 The benefit to be derived from the drainage system in the case at hand is the prevention of street flooding which occurs during the rainy season in certain spots of the area. There was no testimony of floodings on the private properties themselves and much testimony from people who claimed there was no excess water problem at all in their immediate vicinity even in the streets.
The theory on which the benefit was presented at the administrative hearings was that the general area would benefit by relief of the traffic problems and that those who contribute tó the problem should contribute to the solution. It is concluded in agreement with the trial court that this is not a showing of a special benefit to the assessed property. The facilitation of traffic is of general benefit to the community and, thus, if repair and maintenance expenses alone are involved, these are not charged to abutting property owners. (See
Roberts
v.
City of Los Angeles, supra,
“It is possible that it will suffice if, from the nature of the work, the property can be
presumed
to have received an especial benefit.”
(Federal Construction Co.
v.
Ensign
(1922)
As this court has concluded that there was no special benefit shown to plaintiffs’ property, it is unnecessary to consider whether the trial court was also correct in its conclusion that the city used an invalid method of spreading the assessmdnt.
We turn now to consider the scope of the judgment which is attacked by both plaintiffs and defendants. Defendants argue (1) that the court could only consider attacks by property owners on grounds which had been specified in written protests and ón which evidence had been produced in the administrative hearings, and (2) that the action was not a proper class action. Plaintiffs argue that the judgment should extend to all properties within the assessment districts.
In urging their first point, defendants ask this court to accept the following rules: (1) A' property owner must specify his ground for attacking his assessment in his written protest and may not urge any other ground at the protest hearing. (2) If he does not appear at the hearing and offer evidence on the ground specified in the written protest, he may not urge that ground in court.
These rules are not contained in the Municipal Improvement Act of 1913 pursuant to which the assessment proceedings of this case were taken. This act provides for a hearing to consider protests to the proposed improvement. (Sts. & Hy. Code, § 10301.) The act also provides that “Any interested person may object to the proposed improvement, the extent of the assessment district, or to the proposed assessment by filing a written protest with the clerk of the legislative body at or before the time set for the hearing.” (Sts. & Hy. Code, § 10310.) These written protests furnish the basis upon which to activate the majority protest provision of section 10311, a section which bars further proceedings if a majority of property owners protest and the board does not overrule the protests by a four-fifths vote.
Nothing in the statutory scheme expressly forbids oral protests or
*860
implies waiver of grounds upon which evidence is not presented.
1
Case law, however, has restricted the property owner in a later court action to grounds that he presented to the board. The basic reasoning is that where the property owner has an administrative remedy, he must avail himself of it (see
Duncan
v.
Ramish
(1904)
The trial court correctly refused under these circumstances to hold the protesters subject to a requirement that they appear and each
*861
individually assert the ground of lack of special benefit or invalid spread of assessments in order to raise the issue at trial. He also refused to inquire into the adequacy of the statement of grounds contained in each protest. It is concluded that the court’s decision was correct in view of the circumstances of the hearing and the fact that the board was not misled as to the substance of the protests. (See
Halsted
v.
County of Sacramento
(1966)
The court in
Friends of Mammoth
v.
Board of Supervisors
(1972)
It is concluded that the trial court in the instant case correctly allowed the issues of the existence of special benefits and validity of the cost-spread formula to be litigated. We have also concluded that the case was properly brought as a class action. Although no California precedent exists for a class action to test a special assessment, other states have allowed a class action in such a situation. (See, e.g.,
Rafkin
v.
City of Miami Beach
(Fla. 1949)
Code of Civil Procedure section 382 provides that “when the question is one of a common or general interest, of many persons, or when the parties are numerous, and it is impracticable to bring them all before the court, one or more may sue or defend for the benefit of all.” Under the statute, two requirements must be met to sustain a class action. “The first is existence of an ascertainable class, and the second is a
*862
well-defined community of interest in the questions of law and fact involved.”
(Vasquez
v.
Superior Court
(1971)
In the instant case, it is undisputed that there is an easily ascertainable class consisting of property owners in the assessment district who filed timely written protests. That there is “a well-defined community of interest” among these protesters is also apparent. Whether the public improvement specially benefited- the property owners in the assessment district and whether a valid formula had been used to spread the assessments are common questions which need not be litigated separately for each individual property owner. Unlike the situation presented in
City of San Jose
v.
Superior Court
(1974)
Defendants also argue that a class action is not proper because all property owners are mutually antagonistic as regards their respective interests, since in any reapportionment of costs, some assessments are bound to go up if others go down. As plaintiffs point out, this objection to the class action is one first raised on appeal. The objection if made below might have allowed a redefinition of the class if, for example, it were argued that “uphill” and “downhill” protesters have adverse interests. Dismissal of the action is not the remedy in a situation where redefinitions of the class is possible.
(La Sala
v.
American Sav. & Loan Assn.
(1971)
We are next met with the question of whether the assessments on all properties should have been declared void. We conclude that they should, following the reasoning of
Riverdale etc. Dist. No. 805
v.
*864
Shimmin
(1914)
Invalidation of all assessments was within the relief requested. In its memorandum decision the court announced its decision to declare null and void the proceedings creating the districts. Defendants objected and the judgment as entered acted only in regard to assessments on properties of the named petitioners and members of the class they represent. If the nonobjecting property, owners must now pay assessments for a project which does not convey a special benefit, and is not in accord with a valid formula, inequity will result.
Here, a judgment voiding the entire district would be a judgment against a party to the action, the Board of Supervisors of San Mateo County. The fact that the judgment would have an effect on property owners who were not parties to the action and had not objected to the assessment is an incidental benefit, or detriment, to them, depending upon whether they favored the project and the method chosen to pay for it. Under these circumstances, we find no inconsistency with the proposition that a judgment is void to the extent that it is rendered for or against a person who is not a party. '
Defendants also argue that the trial court was under a statutory duty to remand for reassessment proceedings. As defendants point out, the reassessment provisions of the Improvement Act of 1911 are incorporated into the Municipal Improvement Act of 1913 under which these assessment proceedings were held. (See
Brenkwitz
v.
City of Santa Cruz
(1969)
The judgment is modified to include all assessments within the East Palo Alto-Belle Haven Storm Drain Assessment District, Units I and II, and affirmed as modified. Costs to plaintiffs.
Draper, P. J., and Coughlin, J., * concurred.
Notes
The Act of 1911 explicitly set forth that objections not in writing were waived. Therefore, cases cited under this act are distinguishable. (See, e.g.,
Noyes
v.
Chambers & DeGolyer
(1927)
One printed form reads: “We, the undersigned, property owners of East Palo Alto, hereby enter our protest to the East Palo Alto-Menlo Park Storm Drain Program: Unit I, 1) The cost of the program and assessments are prohibitive and unrealistic where the property owners are concerned. While there is some need—the need of such a vast program is grossly exaggerated and its value is questionable; 2) We feel that the governmental agencies concerned failed to make a proper survey in the initial planning. They should have notified the property owners of the magnitude of the assessments and the program before proceeding this far; 3) With the continual rise in property taxes and living costs this assessment will become an impossible burden to the property owners. The economics in this area should be of prime consideration.”
Retired Associate Justice of the Court of Appeal sitting under assignment by the Chairman of the Judicial Council.
