OPINION
This action for injunctive relief and declaratory judgment by Belle Maer Harbor, a marina operator on Lake St. Clair in Harrison Township, Macomb County, Michigan (“Township”) and its manager Marc Howard (collectively “Belle Maer”) attack as vague an ordinance of the township which regulates the marina’s use of mechanical agitators and a tugboat used to keep the waterway from freezing around its boats and structures. From an adverse judgment, Belle Maer appeals. We determine the ordinance, in the part challenged, to be invalid and reverse and remand.
I. BACKGROUND
In 1988, the Township enacted the “Boat Bubbling Ordinance” (“Ordinance 239”) to protect the safety of property owners living along the Township’s waterways and to ensure unimpeded access to Lake St. Clair and other frozen waterways within the Township for winter recreational activities. Ordinance 239 established various safety requirements for the use of mechanical devices known as bubbling devices,
Belle Maer owns and operates Belle Maer Harbor Marina (“Marina”), a private for-profit marina, located in the Township on Lake St. Clair. Navigable canals connecting to Lake St. Clair border the Marina on the west and south, and Lake St. Clair abuts the Marina on the north. The canals vary in width from 148 feet to 200 feet, with over 200 docks located along their banks. To protect its docks, pilings and sea walls from ice damage during the winter months, the Marina operates a tugboat to break up the ice within the Marina’s interior basin and uses bubbling devices to melt ice around its structures within the canals. The Marina complied with the safety requirements of Ordinance 239, although the open water restriction did not apply to Belle Maer because the Marina’s canals exceeded 110 feet in width.
In 1996, the Township adopted Ordinance 303, an amendment to Ordinance 239, which removed the exception to the open water restriction for canals exceeding 110 feet in width. The Township contends that excessive bubbling had created hazardous conditions for Township residents using the frozen waterways. These conditions justified increasing the Ordinance’s safety requirements and expanding the open water restriction from “canals one hundred ten (110’) feet or less in width” to “any canal or waterway” in the Township.
In response, Belle Maer filed a seven-count complaint, seeking, inter alia, a preliminary injunction to prevent the Township from enforcing the open water restriction against Belle Maer. At the outset, the parties stipulated to the entry of a temporary restraining order, enjoining enforcement of the Ordinance pending the conclusion of the proceedings before the court. At the close of discovery, the Township filed a partial motion for summary judgment as to Belle Maer’s federal preemption and vagueness claims, and Belle Maer responded with its own motion for summary judgment for declaratory and injunctive relief.
After hearing oral argument concurrently on both motions, the district court ruled from the bench, granting the Township’s partial motion for summary judgment and denying Belle Maer’s motion for declaratory and in-junctive relief. The next day the parties stipulated to an order dismissing the remaining counts of the complaint. The order also stayed enforcement of the Ordinance pending the outcome of this appeal. Belle Maer timely filed the appeal before this court. We have jurisdiction under 28 U.S.C. § 1291 and review a decision granting summary judgment de novo. See Davis v. Sodexho, Cumberland College Cafeteria, 157 F.3d 460, 462 (6th Cir.1998).
II. DISCUSSION
Turning to the specific arguments presented on appeal, Belle Maer asserts that the Ordinance lacks sufficient definiteness to provide Township residents with adequate notice of the proscribed conduct under the Ordinance. In addition, they contend that the Ordinance’s imprecision precludes Township inspection officers from uniformly enforcing the Ordinance’s open water restriction. Belle Maer also argues that the Township’s five foot radius requirement violated their substantive due process rights on grounds that the Ordinance constituted an unreasonable means of advancing a governmental interest.
A. Void-for-Vagueness
The Due Process Clauses of the Fifth and Fourteenth Amendments provide the constitutional foundation for the void-for-vagueness doctrine. See United States v. Haun,
In examining a facial challenge, this court must first “determine whether the enactment reaches a substantial amount of constitutionally protected conduct.” Hoffman Estates,
Applying these principles to this case, we conclude first that the Ordinance does not threaten to inhibit the exercise of protected First Amendment rights. See Hoffman Estates,
To withstand a facial challenge, an enactment must define the proscribed behavior with sufficient particularity to provide a person of ordinary intelligence with reasonable notice of prohibited conduct and to encourage non-arbitrary enforcement of the provision. See Kolender,
The Ordinance provides that an operator of a bubbling system may maintain an area of open water around a protected object “not to exceed five ... feet, or as determined by the inspecting officer to be a reasonable radius.” Belle Maer identifies two problems with the language of the Ordinance as it pertains to the inspector’s enforcement decisions. First, the Ordinance in no way limits the imposition of criminal penalties on operators for maintaining an area of open water of less than five feet in radius, as long as the shorter radius is determined not to be a “reasonable” radius. Second, if the area of open water exceeds five feet in radius around the protected object, the sole restriction gov
Facing a similar definitional question in Haun, we reaffirmed the general principle that a failure to define a term within a statute or ordinance does not render the statute unconstitutionally vague, where the common meaning of the word provides both adequate notice of the conduct prohibited and of the standards for enforcement. Haun,
Unlike Haun, however, this court cannot say that a commonly accepted meaning exists for the term “reasonable” which would provide an inspection officer with guidance in interpreting the Ordinance and in executing his or her enforcement duties with any uniformity. As a threshold point, the court finds support for this conclusion in Black’s Law Dictionary which uses terms and phrases like “[f]air, proper, just, moderate, suitable under the circumstances” and “[f]it and appropriate to the end in view” to define the term reasonable. Black’s definition demonstrates that a standard grounded on reasonableness in this context is susceptible to a myriad of interpretations conferring on the inspectors “a virtually unrestrained power to arrest and charge persons with a violation.” Kolender,
The Township counsel’s comments at the hearing before the district court on the motions for summary judgment also support our determination: “I would agree that in the text of the ordinance, there are not articulated standards as to what what [sic] factors would determine reasonableness[.]”
Thus, although we do not require impossible clarity in standards governing conduct, Kolender,
But the Township argues to the contrary, relying heavily on Tatum for the proposition that "gray areas" necessarily arise in interpreting words used "to govern human conduct."
This court does not disagree with the Township that many ordinances, statutes and other enactments have "gray areas" requiring use of an officer's discretionary judgment in their enforcement. However, due process requires at least sufficient exactness to prevent arbitrary enforcement and give notice of what an individual must do to comply with the enactment. Construing the open water restriction in conjunction with the Ordinance's stated purpose does not save this enactment from Belle Maer's vagueness challenge. Under the present scheme, neither the enforcement officer nor the bubbler operator can ascertain by examining the language of the Ordinance alone whether criminal sanctions will result from one foot or ten feet of open water created by a bubbler around a protected object. This level of imprecision cannot withstand a due process challenge on vagueness grounds. The people of Harrison are entitled to more definiteness in the Township's law making than illustrated by the language in question of the Ordinance. Therefore, we conclude that the final clause of the Ordinance, which reads "or as determined by the inspecting officer to be a reasonable radius," fails because of vagueness.
Accordingly, we REVERSE the district court’s decision granting summary judgment and dismissing this cause, and we REMAND for further proceedings consistent with this opinion.
Notes
. At the outset, we note that Belle Maer challenges the ordinance's provision governing the use of mechanical agitators, otherwise known as bubbling devices, not the other safety requirements in the ordinance. Belle Maer states that it complies with these safety requirements.
. Bubbling devices extract relatively warmer water from the bottom of a waterway and bring that water to the surface, creating an area of open water which otherwise would be covered by ice.
. Ordinance 239 provided in relevant part:
D. The amount of open water created by a bubbling system shall be controlled as follows: 1. In canals one hundred ten (110’) feet or less in width, a person choosing to bubble shall operate, maintain and periodically inspect the bubbling system apparatus so as to maintain an open water radius surrounding the bubbled object not to exceed five (5') feet, or as determined by the inspecting officer to be a reasonable radius.
Jt.App. at 223.
.Ordinance 303 provides in relevant part:
In any canal or waterway a person choosing to bubble shall operate, maintain and periodically*556 inspect the bubbling system apparatus so as to maintain an open water radius surrounding the bubbled object, not to exceed five (5) feet, or as determined by the inspecting officer to be a reasonable radius.
Jt.App. at 229.
. For clarity's sake, we will refer to Ordinance 239, as amended by Ordinance 303, as "the Ordinance."
. According to Belle Maer’s expert. Professor C. Allen Wortley, the unpredictability of such factors as the weather, underwater currents and other environmental variables, and the current state of the art of bubblers prevent operators from controlling the size of an area of open water created by bubblers with any degree of accuracy.
.The parties continue to dispute whether this court can consider Professor Wortley's expert testimony. Although Belle Maer introduced this evidence into the record, Belle Maer did not direct the court’s attention to this evidence in its response to the Township's motion for summary judgment. This evidence goes principally to the substantive due process argument. The district court did not address this issue; neither do we.
. Having made this sweeping comment, the Township's counsel still maintained at the hearing that the Ordinance’s imprecision does not render it unconstitutionally vague, arguing that the reasonableness standard simply put the burden on the Township to show that the standards were reasonable. This does not satisfy the demands of due process. See Kolender,
. Casey stated the following during an interchange with Belle Maer's counsel in her deposition:
Q. Now, I would like you to take a look at exhibit two there again which is the proposed, the amendment to the bubbling ordinance. Again, I would like to go back to this language which states ["]or as determined by the inspecting officer to be a reasonable radius.[”] Have you been given any kind of standards or any kind of guidelines as to how to make that determination?
A. No.
Q. ■ Okay. Do you know of any standards or any guidelines that you would use as to make this determination?
A. No, I don’t. I think it’s a little vague in it’s [sic] writing because it says or as determined to be reasonable. One person[’]s idea of a reasonable radius would vary from another’s, that’s why I'm not going to make the determination. When it comes to it[,] I’ll take pictures again, I will see what we have out there, I will show the supervisor and they can make the judgment calls.
Jt.App. at 254-55.
. Although counsel for the Township interprets the Ordinance not to apply to open Water less than five feet, the Ordinance is susceptible to a contrary construction, and we must determine validity and invalidity on the basis of the language itself.
. Belle Maer also claims that the language of the open Water restriction-bubbler system or mechanism -failed to provide notice of whether this provision applied to Belle Maer~s tugboat. Having declared the open water restriction in the Ordinance void-for-vagueness on other grounds, we decline to reach this issue.
. The Tatum court rejected a vagueness challenge to the RICO statute, exclaiming that nothing "startling" existed in that statute to render it unconstitutionally vague.
. We further question whether the Ordinance's requirement that an operator `periodically inspect" his or her bubbling device "so as to maintain an open radius ,.. not to exceed five feet might also be unconstitutionally vague. An
