Plaintiffs appeal as of right the circuit court’s order granting defendant’s motion for summary disposition. We affirm.
The material facts of this case are undisputed. During the late 1920s, the Oakland County drain commissioner constructed a combined storm water and sanitary sewer system in an area of the county that was primarily vacant. Today, those sewers (hereafter referred to as the Bloomfield Village System) serve *490 residents and commercial establishments in portions of the city of Birmingham, the city of Bloomfield Hills, and the defendant Bloomfield Charter Township. The Bloomfield Village System carries storm water and untreated sanitary sewage into the Evergreen Farmington Sewage Disposal System (efsds), a facility operated by the Oakland County drain commissioner. From there, the untreated wastewater flows on to a treatment plant in the city of Detroit. Because of physical limitations of the efsds, the amount of wastewater defendant is permitted to discharge into the efsds at any given time is controlled by flow regulators within defendant’s sewers. Other municipalities served by the efsds are subject to similar limitations.
During periods of heavy precipitation, the amount of wastewater in the Bloomfield Village System occasionally exceeds that which may be discharged into the efsds. When this happens, untreated sewage must be diverted elsewhere in order to prevent it from backing up into houses. This event, known as a combined sewer overflow (cso), is a common problem associated with combined sewer systems, esos do not occur in separate (two-pipe) storm water and sanitary sewer systems because in two-pipe systems storm runoff does not mix with sanitary sewage. Until recently, esos occurring in the Bloomfield Village System were diverted directly into the Rouge River.
The Clean Water Act, 33 USC 1251 et seq., was passed by Congress in part to address the problems caused by CSOs. Pursuant to the National Pollutant Discharge Elimination System (npdes) permit program established under that act, the Oakland County drain commissioner and the municipalities served by the *491 Bloomfield Village System were required to take steps to abate the pollution of the Rouge River. In order to comply with the requirements of federal law — and in particular with a npdes permit issued on October 12, 1992 — the municipalities agreed to construct the ten-million-gallon Lincoln Hills CSO Retention Treatment Basin (rtb). 1 The RTB now serves as a repository for the excess wastewater that would otherwise have been diverted into the Rouge River. Wastewater diverted into the rtb is either held there until the flow rate decreases (at which time it is conveyed to the EFSDS), or treated and released into the river. The result is a cleaner Rouge River.
Construction of the rtb was financed by the drain commissioner through the sale of bonds. Each of the three municipalities using the RTB is responsible for paying its allocated share of the total cost of the project over a period of years. In order to raise money to pay its share, defendant created a special assessment district and adopted a special assessment roll in the amount of $8,887,016. 2 See MCL 280.490; MSA 11.1490. The special assessment district, which includes over two thousand residences, commercial establishments, and the Oakland Hills Country Club, is comprised of all of the parcels within the defendant township served by the Bloomfield Village System. Defendant levied rates ranging from $35 a year to $350 a year on each parcel within the district for a *492 period of twenty years. 3 All of the parcels inside the township but outside the boundaries of the special assessment district are served either by (1) a two-pipe sewer system, or (2) private septic systems. Accordingly, before construction of the rtb, the only sanitary sewage from the defendant township diverted into the Rouge River was that from those properties within the special assessment district.
Plaintiffs are a group of property owners residing within the special assessment district. In 1994, they brought a class action in the Oakland Circuit Court challenging the creation of the special assessment district. Although the class was never certified, the parties stipulated that defendant would adhere to the result of the action with respect to all of the property owners within the special assessment district. Defendant removed the case to federal court and moved for summary judgment. A federal district court granted defendant’s motion for summary judgment, but its opinion was vacated by the Sixth Circuit Court of Appeals on the ground that the district court lacked removal jurisdiction. When the case was eventually remanded back to the Oakland Circuit Court, defendant moved for summary disposition pursuant to MCR 2.116(C)(10). The circuit court granted defendant’s motion and plaintiffs brought this appeal.
On appeal, plaintiffs challenge the circuit court’s decision to grant defendant’s motion for summary disposition. We review de novo a trial court’s decision regarding a motion for summary disposition.
Spiek v Dep’t of Transportation,
A special assessment is a levy upon property within a particular district.
Kadzban v Grandville,
Plaintiffs first contend that the special assessments are invalid because the rtb project conferred no special benefit on their property. We disagree. Plaintiffs assert that the only tangible benefit resulting from the rtb is a cleaner Rouge River. This benefit, they reason, has been conferred upon the community as a whole as much as it has upon those owning property within the special assessment district. Although we do not question the soundness of plaintiffs’ reasoning, we believe they have overlooked the most direct and particularized benefit they receive from the RTB: it allows them to continue receiving sewer service from defendant. As a result of the change in federal law, defendant could not legally continue to provide sewer service to plaintiffs without first building the rtb or making an equivalent capital improvement. Plaintiffs admit as much in their brief on appeal, stating that “[t]he construction of the [rtb was] necessary for the Township to continue to operate its sewer system.”
Despite this fact, plaintiffs contend that the change in federal law and the construction of the rtb had no practical effect on their use and enjoyment of the subject properties. Of course, plaintiffs’ contention rests on the assumption that defendant had an affirmative duty to continue providing sewer service to them. Plaintiffs have offered no authority directly in support of this proposition.
4
Moreover, we have found
*495
nothing to support the existence of such a duty. Cf.
Kuriakuz v West Bloomfield Twp,
If defendant sought to provide new sanitary sewers to an area within the township lacking sewer service, it could fund the project through special assessments. See
Kadzban, supra
at 500-501; see also
Shelby Charter Twp v State Boundary Comm,
Plaintiffs next argue that the special assessments are invalid because the rtb project did not result in an increase in the market value of their property. We disagree. Although it is undisputed that the construction of the RTB caused no discernible change in the market value of the properties within the special assessment district, we are not persuaded that this fact alone rendered the special assessment district invalid.
The essential question is not whether there was any change in market value, but rather whether the market value of the assessed property was increased as a result of the improvement. See Kadzban, supra at 501; Dixon Rd, supra at 400-401. Common sense dictates that in order to determine whether the market value of an assessed property has been increased as a result of an improvement, the relevant comparison is not between the market value of the assessed property after the improvement and the market value of the assessed property before the improvement, but rather it is between the market value of the assessed property with the improvement and the market value of the assessed property without the improvement. *497 The former comparison measures the effect of time, while the latter measures the effect of the improvement. In this case, it is clear that, after the change in federal law, the market value of plaintiffs’ properties with the RTB in place was higher than it would have been without the rtb in place. This is so because without the rtb, defendant could not have continued to provide sewer service to plaintiffs. Without such service, the market value of plaintiffs’ properties would undoubtedly have been substantially reduced. Because plaintiffs offer no argument to the contrary, we will not upset the presumably valid judgment of defendant’s municipal officers with respect to this issue. Kadzban, supra at 502, quoting Dixon Rd, supra at 403.
Finally, plaintiffs argue that the special assessments are invalid under defendant’s township ordinance regarding the determination of rates and charges for use of the township’s sanitary sewer system. We disagree.
Bloomfield Township Ordinance No. 454 provides, in part, “The amount of the rates and charges shall be sufficient to provide for debt service and for the expenses of operation, maintenance and replacement of the system as necessary to preserve the same in good repair and working order.” The ordinance further provides that “[t]he rates and charges for operation, maintenance and replacement hereby established shall be uniform within the area serviced by the Township of Bloomfield.” Plaintiffs assert that defendant is required under Ordinance No. 454 to fund its allocated share of the cost of the rtb through its uniform sewage treatment fees.
*498
The rules of statutory interpretation apply to the interpretation of ordinances.
Gora v Ferndale,
Affirmed.
Notes
Specifically, the 1992 npdes permit authorized the affected municipalities’ plan to correct the cso problem through the construction of the rtb. As an alternative, the affected municipalities could have elected to correct the CSO problem by replacing the combined sewers in the Bloomfield Village System with a new two-pipe sewer system utilizing separate lines for storm water and sanitary sewage.
A portion of defendant’s share was also paid for by a federal grant.
The special assessment district was subdivided into four geographic sections. The rate of assessment within each section is uniform.
The two trespass-nuisance cases cited by plaintiffs as ostensibly supporting this proposition,
Hadfield v Oakland Co Drain Comm’r,
Pursuant to MCL 280.490(1); MSA 11.1490(1), a special assessment imposed under the authority of the Drain Code is not valid if it is “inconsistent with local financing policy for similar drains and sewers.” In this case, plaintiffs do not make a concerted argument that the special assessment district at issue was in violation of this requirement.
