The Stop & Shop Companies, Inc. (Stop & Shop), filed a complaint in Superior Court seeking damages for the loss of business revenues allegedly caused by the defendants’ negligent collision with a drawbridge resulting in the obstruction of the bridge. After hearings before a special master, a judge of the Superior Court granted summary judgment for the defendants and dismissed the complaint. Stop & Shop appealed, and we took the case on our own motion. We reverse the decision of the Superior Court, in part, upon our conclusion that the plaintiff’s complaint adequately states a claim for relief sounding in public nuisance.
The relevant facts as alleged in the complaint are as follows. Stop & Shop owns and operates a supermarket and a Bradlees retail store in Somerset, Massachusetts. Substantial numbers of customers from Fall River travel across the Brightman Street bridge (bridge) to shop at these stores. On or about September 2, 1979, the seagoing barge Irving Sea Lion, owned and operated by the defendant J. D. Irving, Limited, negligently struck the bridge. At the time of the accident, the barge was being pushed by the tugboat Irving Maple, owned and operated by the defendant Universal Sales, Limited, and both the tug and the barge were under the control of the defendant Bruce B. Fisher. As a result of the collision, the bridge was closed to traffic for approximately two months, causing a substantial decline in the number of customers who patronized Stop & Shop’s stores, which were located at one end of the bridge. Based on these facts, Stop & Shop sought damages for the injury to its business on two theories: the defendants’ negligence was the direct cause of Stop & Shop’s economic harm, and the defendants’ actions contributed to the creation of a nuisance which caused it substantial injury in the use and enjoyment of its property.
The defendants moved “pursuant to Rule 12 (b) (6) and Rule 56 of the Massachusetts Rules of Civil Procedure,” to *891 dismiss the complaint for “failure to state a cause of action.” The parties submitted briefs and memoranda on several legal issues, and hearings on the motions were held before a special master. Neither party submitted any factual materials beyond the pleadings. The special master concluded that “there are no issues of material fact in dispute and the defendants are entitled to prevail as a matter of law.” Stop & Shop’s position is that the matter before the lower court was a rule 12 (b) (6) motion to dismiss (only), and that the complaint was a sufficient statement under the rule. Nevertheless, the judge granted the motions, which he termed “motion[s] to dismiss (treated as . . . motion[s] for summary judgment),” and dismissed Stop & Shop’s complaint.
We conclude that the motions before the judge should have been treated as rule 12 (b) (6) motions, and no more. Our principal consideration of the allegations of the complaint concerns the policy issue whether, in the circumstances alleged here, a plaintiff business establishment states a sufficient claim for relief on either negligence or nuisance grounds, or both. We conclude that the complaint adequately states grounds for relief under its claim sounding in public nuisance. 2
1. We turn first to Stop & Shop’s argument that the defendants’ motions should have been treated as motions to dismiss for failure to state a claim upon which relief can be granted under Mass. R. Civ. P. 12 (b) (6),
We next consider whether these rule 12 (b) (6) motions were properly converted to rule 56 motions. Rule 12 (b) provides that if on a rule 12 (b) (6) motion “matters outside the pleading are presented to and not excluded by the court, the motion shall be treated as one for summary judgment and disposed of as provided in Rule 56, and all parties shall be given reasonable opportunity to present all material made pertinent to such a motion by Rule 56.” The category of “matters outside the pleading” is broad, but even when construed broadly, such matters must provide some relevant, factual information to the court. 5 C.A. Wright & A.R. Miller, Federal Practice and Procedure § 1366, at 677-678, 681-682 (1969 & Supp. 1982). Cf.
White
v.
Peabody Constr. Co.,
The conversion was also improper because Stop & Shop was not notified that it was defending against anything other than rule 12 (b) (6) motions, and so it had no practical opportunity to present materials relevant under rule 56. 5 C.A. Wright & A.R. Miller,
supra
at 683. See
Dale
v.
Hahn,
*893 Since the defendants’ rule 12 (b) (6) motions were improperly converted to motions under rule 56, without notice to Stop & Shop, we would affirm the decision below only if “it appealed] to a certainty that [plaintiff was ] entitled to no relief under any state of facts which could be proved in support of the claim.” Reporters’ Notes to Mass. R. Civ. P. 12, Mass. Ann. Laws, Rules of Civil and Appellate Procedure at 211 (1982), quoting 2A Moore’s Federal Practice par. 12.08, at 2274 (2d ed. 1982). Our holding that Stop & Shop’s complaint states grounds for relief in nuisance precludes dismissal under this standard. We therefore proceed to discuss its substantive claims.
2. Stop & Shop relies on
Newlin
v.
New England Tel. & Tel. Co.,
Stop & Shop’s reliance on Newlin is misplaced. The economic loss in Newlin arose from physical harm to the plaintiff’s crop. Stop & Shop’s losses, by contrast, were not associated with any physical damage to its property.
Those cases relying on
Newlin
have involved physical harm to the plaintiff or his property. See
Kilduff
v.
Plymouth County Elec. Co.,
3. Stop & Shop’s primary claim is that it is entitled to recover because the defendants’ conduct created a nuisance which caused Stop & Shop economic loss. Accepting Stop & Shop’s allegations as true, the defendants’ negligence closed the bridge for approximately two months. This was an obstruction of a public way, and as such constituted a public nuisance. See
Robinson
v.
Brown,
Our older cases held that, absent physical harm to the plaintiff’s property, obstruction of a public way caused
*895
special damages only if the obstruction cut off immediate access to a public highway or river. See, e.g.,
Eaton
v.
Locke, supra
at 325;
Robinson
v.
Brown, supra
at 267;
Nichols
v.
Richmond,
Our old rule has the advantage of avoiding a multitude of suits by setting up a clear and restrictive line of demarcation between special and general damages. While such a clear line also has a certain theoretical appeal, we conclude that its clarity does not compensate for the fact that it precludes any claim, even in cases where an established business may have been virtually destroyed. Cf.
East Cairo Ferry Co.
v.
Brown,
We note that a majority of the Federal courts take the opposite view.
4
Although they use negligence analyses, it is clear that these Federal courts would reach the same result in nuisance, and a few cases have expressly so held.
Dick Meyers Towing Serv.
v.
United States,
The plaintiff must suffer special pecuniary harm from the loss of access. Severe pecuniary loss is usually a special type of harm, but if a whole community suffers such loss, then it becomes a public wrong and the plaintiff cannot recover. Restatement (Second) of Torts, supra, § 821C comment h. Prosser, Private Action for Public Nuisance, supra at 1013-1015. Thus, the question becomes whether so many businesses have suffered the same economic harm that the plaintiff’s damages are no longer special.
Similarly, the point at which a plaintiff has lost access is not fixed. “Deprivation of immediate access to land . . . which is clearly a special kind of harm, shades off by imperceptible degrees into the remote obstruction of a highway, which is just as clearly not.” Restatement (Second) of Torts, supra § 821G comment c. Accord, W. Prosser, Torts, supra § 88, at 589-590. “The problem is the familiar legal one of drawing a line between two clearly different extremes at some point where only an artificial distinction is possible between points that lie immediately on either side.” Prosser, Private Action for Public Nuisance, supra at 1022.
In evaluating a claim by a plaintiff that he should be compensated for a land taking by reason of the rerouting of a road in
Malone
v.
Commonwealth,
Malone
suggests we consider “the existence, availability, and feasibility of routes ... in connection with the uses to which the property has been . . . put, to determine whether the claimant or his patrons, previously in a reasonable relation to a road system reaching the property, have now been left without such a relation.”
Malone
v.
Commonwealth, supra
at 80. See
LaCroix
v.
Commonwealth,
We express no opinion as to the merits of Stop & Shop’s public nuisance claim under these tests; the defendant remains free to challenge the claim on a motion for summary judgment. We also note that the parties do not attack the special master’s decision to base his recommendation on State law. We therefore do not decide whether Federal law applies to this action, either as a matter of our law under
Thorneal
v.
Cape Pond Ice Co.,
4. In sum, it is clear beyond dispute, and for obvious reasons, that policy rules limiting liability are recommended for application to cases like this one. In negligence cases, recovery has wisely been confined to physical damage to the plaintiff’s property. In public nuisance claims we now decide that, absent physical harm or immediate or direct loss of access to the plaintiff’s property, relief is warranted only where the plaintiff has suffered special pecuniary harm and substantial impairment of access. Further, these two principal issues are questions of degree.
The judgment of the Superior Court is reversed and a new order is to be entered on the defendants’ motions to dismiss, “pursuant to Rule 12 (b) (6), and Rule 56,” allowing the motions under rule 12 (b) (6), as to the plaintiff’s claim in negligence, and denying the defendants’ motions under rule 12 (b) (6) (only), as to the plaintiff’s claim in public nuisance.
So ordered.
Notes
Stop & Shop alleges that the defendants’ negligent conduct created a public nuisance. Nuisance liability must be “based upon a determination that the interference [complained of] is intentional and unreasonable or results from conduct which is negligent, reckless or ultrahazardous.”
Ted’s Master Serv., Inc.
v.
Farina Bros.,
The cases did not distinguish between the plaintiff’s use of a river or highway, for example, as a common carrier, and use by the plaintiff’s customers. Compare
Burgess
v.
M/V Tamano,
The United States Courts of Appeals for the Fifth and Eleventh Circuits have adopted a rule, similar to that of the Restatement (Second) of Torts,
supra,
§ 766C, denying recovery for negligently caused economic harms. See
Kingston Shipping Co.
v.
Roberts,
