ENGEL, Circuit Judge.
In this appeal we are required to consider whether the Fourth Amendment protection against unreasonable searches and seizures extends to the warrantless seizure of statutorily required records from the office of a. coal mine company where they were located on a table and open to inspection.
We reverse the district court judgment suppressing the records and directing their return to the coal mine operator.1 In so doing, we recognize that the mine industry is a highly regulated one and that a businessman in such an industry, in accepting the burdens as well as the benefits of the trade, is said to consent to restrictions placed upon him. Marshall v. Barlow’s, 436 U.S. 307, 313, 98 S.Ct. 1816, 1820-21, 56 L.Ed.2d 305 (1978); Almeida-Sanchez v. United States, 413 U.S. 266, 271, 93 S.Ct. 2535, 2538, 37 L.Ed.2d 596 (1973). Although the coal mine operator has an interest in the retention of the records, we find that it does not rise to a Fourth Amendment interest which requires their suppression.
I.
Shortly before noon on March 9, 1976, an underground explosion occurred within the Imboden seam of the Scotia Coal Mine, located in Letcher County, Kentucky. Officials of the Mine Enforcement and Safety Administration2 (MESA) began to arrive at the mine premises in the early afternoon to coordinate the rescue efforts for fifteen coal miners who were trapped underground. The Scotia Mine was owned and operated by appellee Scotia Coal Company and by its parent company, appellee Blue Diamond Coal Company.
At approximately 3:00 P.M. that afternoon, Bill Clemons, an assistant district manager for MESA, arrived at the mine and assumed control of the rescue and recovery operations. Approximately 9:00 [513]*513P.M., while the coal miners were still trapped underground, Clemons ordered a subordinate to confiscate records which the mining company was required to maintain under the Coal Mine Health and Safety Act of 1969, 30 U.S.C. § 863. Among the records required to be kept under the Act were tests for the methane content of the air at underground locations within the coal mines. A belief that methane concentration, a frequent cause of ignition within coal mines,3 had not been properly monitored, was given by Clemons as his reason for ordering the seizure of the records:
Q Now, do you recall giving any instructions to anyone about any Fire Boss books of the company?
A Sometime on the night of March 9th, I think — can’t remember exactly — it was around 9:00 o’clock, I told someone to confiscate the Fire Boss books.
Q Why did you tell someone to do that?
A By that time it was fairly well apparent to me that there was a good possibility of the disaster from the explosion and it was my feeling that there would be an extensive investigation and the Fire Boss books would be of value in the investigation.
Q What were the Fire Boss books or what are Fire Boss books.
A Fire Boss books is a book in which records of the examinations of the mine are kept. These examinations are required to be made before we get into a mine.
Q Why did you think they might be of some help in an investigation?
A In my mind at that time from the extent of the explosion and from where the — I was told by someone that the end of the track was, it was quite apparent there had been a large accumulation of methane on that section and if the section had been fire-bossed, I could not understand how that large a volume of methane could have accumulated since the time it should have been firebossed.
Q Whose duty is it, if anyone’s duty, to keep and maintain the Fire Boss Books?
A It’s the company’s responsibility to maintain the Fire Boss books. ******
Q If it was a duty of the company to maintain the books and keep the books, why did you ask someone to take custody of the books?
A To be sure that we had them available to look at and study and be sure none were misplaced or anything. ******
Although Clemons could not remember to whom he gave the particular instruction, Herman Lucas, a coal mine inspector for [514]*514MESA, testified that he received the order and carried it out.
Lucas understood that the instruction included not only the Fire Boss book, but extended to the pre-shift books, on-shift books and electrical examination books. All of these books contained entries recording the result of inspections made by mine employees; all were required by the Coal Mine Health and Safety Act of 1969.4
In carrying out Clemons’ order, Lucas seized and removed a total of 20 books from the mine office and electrical shop on the mine premises. These included six pre-shift and on-shift books, the “bore hole” and “new return” books, the Fire Boss book, the two weekly books and electrical examination books from nine areas of the mine.
Lucas first proceeded to the mine office where all the books, except for the electrical records, were kept. The mine offices were located approximately 100 yards from the mine which contained the Imboden Seam, the site of the accident. Jasper K. Cornett, Vice President of Operations for Blue Diamond and Scotia, testified concerning the location of the records within the office:
Q Where were the books in active use, that were in the process of being filled; where were they actually kept?
A Well, for the most part, there was a table in the Mine Office like a conference table that the various foremen came, either when they were preparing to go on the shift or when they came off, they sat down and made out their various records, their time sheets, their inspection reports, these things. They sat around this table and made out — filled out their books and they left them lying there on that table. They were available for the other people that came in or out.
Q Did a MESA inspector regularly make use of these books and examine them?
A Yes; whatever occasion they were there for, they also included examination of the books as part of their inspection of the mine.
Q Was there any restriction made upon them when they could look at the books?
A No, sir; they were available at all times.
A second shift mine foreman, Bruce Jones, testified that he was present when Lucas entered the office between 5:00 and 6:00 P.M. that afternoon. Jones stated that “quite a few” people were in the office at that time. Upon leaving, Lucas inquired where the electrical records were kept. He then went to the electrical shop and was provided the records maintained at that location after making a demand for them. Finally, he asked David Adams, a maintenance foreman, if he desired a receipt for the records, including those taken from the mine office.
It is undisputed that after the records were seized, no MESA official examined them or intended to do so at any time during the rescue operation, which lasted until March 11. Although Clemons denies giving any such order, the books were locked in a government vehicle by Robert Fleming, a coal mine inspector, during the late evening or early morning of March 9 or 10. Fleming turned the books over to MESA’s Whitesburg, Kentucky office on March 11. The record shows that the coal company repeatedly asked for the records to be returned, but did not receive an inventory until several weeks later.
II.
On June 25, 1979, a grand jury in the United States District Court for the East[515]*515ern District of Kentucky returned an indictment charging the appellee mine companies with four counts of willfully violating a mandatory safety standard in the operation of a coal mine, in violation of 30 U.S.C. §§ 819, 863 and 877. The mine companies were also charged with two counts of making false statements in records required to be maintained by the mine operator, in violation of 30 U.S.C. § 819.
In advance of the trial, the defendants moved to suppress the records which had been seized by the federal mine inspection officials from the mine premises. Following an evidentiary hearing, the district court granted the motion and in a memorandum opinion held that the seizure of the records violated the defendants’ rights under the Search and Seizure Clause of the Fourth Amendment. In suppressing the evidence and ordering its return to the coal companies, the district judge held that there was not, in the first instance, any “search” within the meaning of that term under the Constitution since “there is no evidence suggesting any general exploration or rummaging through other papers or belongings. Coolidge v. New Hampshire, 403 U.S. 443, 467, 91 S.Ct. 2022, 2038-39, 29 L.Ed.2d 564 (1971). To have a search within the meaning of the Fourth Amendment, it is necessary to have a factual predicate which reveals a looking, an exploration or quest for that which is not in plain view.” (Citations omitted).
Nevertheless the district judge held that “[w]hat did occur within the consideration of the Fourth Amendment at the Scotia mine buildings was a seizure. The federal agent had no warrant.” Although recognizing that the defendants were engaged in a closely and pervasively regulated industry, the trial court held that [t]he mere fact of a lessened expectation of privacy does not vacate the protection of the Fourth Amendment against unreasonable seizure,” relying upon our circuit’s decision in United States v. Consolidation Coal Co., 560 F.2d 214, 217 (6th Cir. 1977), vacated and remanded 436 U.S. 942, 98 S.Ct. 2841, 56 L.Ed.2d 783 (1978), judgment reinstated 579 F.2d 1011 (6th Cir. 1978), cert. denied, 439 U.S. 1069, 99 S.Ct. 836, 59 L.Ed.2d 34 (1979):
Even where a statute requires records to be maintained and authorizes on-premises inspection of them in the normal course no precedent sanctions direct access to the records without demand in the absence of a search warrant.
The trial court also expressly held upon the facts before it that there had been no consent by mine company officials to the seizure of the records, and that notwithstanding the presence of emergency conditions related to the rescue of the missing miners, “the seizure of the records here was ‘detached’ from the exigent circumstance of the rescue crisis for, in fact, the seizure had no bearing on the rescue operations.” Under such circumstances, therefore, “the government has failed to establish by evidence any viable ground for not adhering to the established procedures for securing the documents it deemed important; in this instance it is the procedural defect which dictates the conclusion that the seizure of the Scotia records was impermissible.”
III.
A.
The coal mining industry is subject to pervasive regulation by federal statute. The congressionally expressed purpose of the Coal Mine Health and Safety Act of 1969 is the protection of the health and safety of the coal miner as well as the improvement of working conditions and practices in the coal mines. 30 U.S.C. § 801.
To effectuate these purposes, Congress has promulgated numerous health and safety standards within the Act. An essential part of the legislation provides for routine examination and testing of conditions within the coal mines by the miners themselves to monitor compliance with the health and safety standards and to discover any other hazardous conditions. The results of these examinations must be recorded in books approved by the Secretary. These record [516]*516books, with the sole exception of the electrical inspection reports, are to be maintained “in an area on the surface of the mine chosen by the mine operator to minimize the danger of destruction by fire or other hazard, and the record shall be open for inspection by interested persons.” 30 U.S.C. § 863(d)(1), (f), (g), (w). The electrical reports are required to be maintained for inspection by mine employees and the MESA representative. 30 U.S.C. § 865(g).
Congress has also provided for inspections and investigations of coal mines by the Secretary or its representative (MESA). These inspections and investigations may be for any of four purposes:
(1) obtaining, utilizing, and disseminating information relating to health and safety conditions, the causes of accidents and the causes of diseases and physical impairments originating in such mines,
(2) gathering information with respect to mandatory health or safety standards,
(3) determining whether an imminent danger exists, or
(4) determining whether or not there is compliance with the mandatory health or safety standards or with any notice, order, or decision issued under this subchapter.
30 U.S.C. § 813(a).
Notice to the coal mine operator is not allowed for inspections coming within the third or fourth clause of this section.5 The government is given a “right of entry to, upon, or through any coal mine” to make any such inspection or investigation. 30 U.S.C. § 813(b)(1). This has been interpreted as creating an exception to the warrant requirement of the Fourth Amendment.6
The Act also contains procedures applicable to accidents. Thus, when a mining accident occurs, the operator is required to take measures to prevent the destruction of evidence which would assist in investigating its causes. 30 U.S.C. § 813(e). For its part, the government is entitled to take any action necessary to protect lives and is given a discretionary right to direct rescue and recovery operations. 30 U.S.C. § 813(e). The operator must investigate the cause of an accident and make records of such investigation open for inspection by interested persons. 30 U.S.C. § 821(a). The government may subpoena witnesses and relevant papers, books, and documents for the purpose of holding a public hearing to make an investigation of the accident. 30 U.S.C. § 813(d).
Finally, the Act gives the government the power to obtain a permanent or temporary injunction, restraining order, or other appropriate order from a United States District Court if the operator fails to cooperate with the Secretary or its representative. Examples of such conduct are failure to admit representatives to the mine, refusal to permit inspection, or refusal to permit access to or the copying of records. 30 U.S.C. § 818(c), (d), (f).
[517]*517B.
Courts have consistently upheld the constitutionality of the warrantless provision of the mining acts although the Supreme Court has held that such exceptions are limited to “relatively unique circumstances” involving industries with a history of close government regulation.7 Marshall v. Barlow’s, Inc., 436 U.S. 307, 313, 98 S.Ct. 1816, 1821, 56 L.Ed.2d 596 (1978). The Supreme Court has recently held that the general program of warrantless inspections authorized by Section 103(a) of the 1977 Act, 30 U.S.C. § 813(a), does not violate the Fourth Amendment.8 Donovan v. Dewey, 452 U.S. 594, 101 S.Ct. 2534, 69 L.Ed.2d 262 (1981). In Donovan, the Supreme Court noted:
[Our past] decisions make clear that a warrant may not be constitutionally required when Congress has reasonably determined that warrantless searches are necessary to further a regulatory scheme and the federal regulatory presence is sufficiently comprehensive and defined that the owner of commercial property cannot help but be aware that his property will be subject to periodic inspections undertaken for specific purposes.
101 S.Ct. at 2539. Applying these principles, the Court found first that Congress reasonably determined that warrantless searches are necessary to further the substantial federal interest in mine safety:
[I]t is undisputed that there is a substantial federal interest in improving the health and safety conditions in the Nation’s underground and surface mines. In enacting the statute, Congress was plainly aware that the mining industry is among the most hazardous in the country and that the poor health and safety record of this industry has significant deleterious effects on interstate commerce. Nor is it seriously contested that Congress in this case eould reasonably determine ... that a system of warrantless inspections was necessary “if the law is to be properly enforced and inspection made effective.” United States v. Biswell, 406 U.S., [311] at 316, 92 S.Ct. [1593] at 1596 [32 L.Ed.2d 87]. In designing an inspection program, Congress expressly recognized that a warrant requirement could significantly frustrate effective enforcement of the Act.
Id. at 2539-40. Next the Court reviewed the inspection provisions of the Act and held that “the regulation of mines it imposes is sufficiently pervasive and defined that the owner of a [mining facility] cannot help but be aware that he ‘will be subject to effective inspection.’ ” Id. at 2540. Finally, the Court noted:
[T]he Act provides a specific mechanism for accommodating any special privacy concern that a specific mine operator might have. The Act prohibits forcible entries, and instead requires the Secretary, when refused entry onto a mining facility, to file a civil action in federal court to obtain an injunction against future refusals. 30 U.S.C. § 818(a) (1976 ed., Supp. III). This proceeding provides an adequate forum for the mine owner to show that a specific search is outside the federal regulatory authority, or to seek from the District Court an order accommodating any unusual privacy interests that the mine owner might have.
Under these circumstances, it is difficult to see what additional protection a warrant requirement would provide.
Id. at 2541 (citations omitted).
IV.
The district court ruled there was no search within the meaning of the Fourth Amendment because inspector Lucas did not rummage once he was within the mine office. The entry into the office, however, is itself a search for purposes of the Fourth [518]*518Amendment. See Youghiogheny and Ohio Coal Co. v. Morton, 364 F.Supp. 45, 48 (S.D.Ohio 1973); United States v. Consolidation Coal, supra, 560 F.2d at 214, 219.
The district court was correct in holding that Lucas conducted no search once within the mine office. MESA officials, according to Jasper Cornett, the vice president of the coal companies, regularly made use of the books kept on the table inside the mine office. The records were open for inspection at all times. MESA officials had never been denied access to them. Moreover, the entry was made at a reasonable time, during a regular mining shift when people were on the premises. There is no evidence that Lucas intruded into any area other than where these books were kept and to which MESA had access; Lucas did not enter for the purpose of inspecting private areas within the mine offices.
The coal companies do not challenge the authority of Lucas to enter the mine offices under normal investigatory procedures. They argue, however, that this particular entry was unlawful because of the intruding mine inspector’s ulterior motive. The acquiescence of the operator to the normal investigating entry may be explained by its submission to lawful authority provided in the Coal Mine Health and Safety Act of 1969. 30 U.S.C. § 813(b). Entry to the mine offices at reasonable times and in a reasonable manner is itself legal. United States v. Consolidation Coal, supra. There cannot be, however, any rummaging or further intrusion once within the office, Marshall v. Nolichuckey Sand, 606 F.2d 693 (6th Cir. 1979).
We need not adopt here a mode of analysis by which the constitutionality of the inspector’s entrance into the mine office is to be judged by his purpose for entry. The inspector did not carry on an offensive search. He entered the mine office during reasonable hours and went only to areas where the records were maintained in part for MESA inspection. It was an entry to which the mine operator had always consented.
Our inquiry therefore narrows to whether the seizure of the records violates the Fourth Amendment.
V.
Any inquiry into the validity of the seizure of the records must begin with the general rule that warrantless searches and seizures are per se unreasonable under the Fourth Amendment. Katz v. United States, 389 U.S. 347, 357, 88 S.Ct. 507, 514, 19 L.Ed.2d 576 (1967); Camara v. Municipal Court, 387 U.S. 523, 87 S.Ct. 1727, 18 L.Ed.2d 930 (1967). The Warrant Clause of the Fourth Amendment protects commercial dwellings as well as private homes. Marshall v. Barlow’s, Inc., supra. The purpose behind the warrant requirement is to insure that the judgment of a neutral and detached magistrate is imposed against the unbridled discretion of an official caught up in the heat of an investigation. United States v. Chadwick, 433 U.S. 1, 9, 97 S.Ct. 2476, 2482, 53 L.Ed.2d 538 (1977); Johnson v. United States, 333 U.S. 10, 14, 68 S.Ct. 367, 369, 92 L.Ed. 468 (1948).
The government argues with great force that because the Coal Mine Health and Safety Act of 1969 specifically required the operator to maintain the seized records and keep them open to inspection, there is no expectation of privacy which justifies their suppression.
We cannot agree that these records are of interest or importance only to the government. It is not uncommon for records required by statute to serve multiple purposes. They may be used in thé day-to-day operation of the coal mine. It is important for management to know the physical conditions within the mine. The miners also clearly benefit from having the records present at the mine site. Without them, the miner loses the protection afforded by knowing the location of dangerous areas within a mine. The records provide a medium whereby different shifts of miners may communicate with each other concerning [519]*519mine conditions. The records may also be of use when a dangerous condition or accident increases the peril of mining coal, in locating the cause of the condition, or perhaps in determining its scope, thereby indicating how much of the mine may continue in operation.
The Coal Mine Health and Safety Act itself indicates that the coal mine operator has at least some interest in having the record books on its premises. The Act gives the Secretary authority to obtain a district court order should the operator fail to give the Secretary access to the records or allow them to be copied. 30 U.S.C. § 818(f). Thus there exists a statutory remedy where access to the records is refused. This provision has been interpreted as one of the elements of the Act which preserve its constitutionality after Marshall v. Barlow’s, supra, specifically because it provides the opportunity for the protection of privacy expectations. Marshall v. Nolichuckey Sand, supra. Marshall v. Texoline, 612 F.2d 935 (5th Cir. 1980); Marshall v. Stoudt’s Ferry Preparation Co., supra.9
The Act also allocates the burden of investigating accidents upon the operator of the coal mine.10 30 U.S.C. § 821. If the companies may be deprived of the records necessary for such investigation, they will not be able to comply with their statutory responsibility. The importance of the investigation of accidents may be gleaned from an examination of the legislative history of the 1977 Act:
Such investigations shall be made and records kept whether or not the accident results in injury or death. Every accident must be investigated by an operator both to determine its cause and to ascertain the means to prevent recurrence. This provision reasserts the Committee’s view that the primary responsibility for mine safety and health is the operator’s and requires the operator to maintain a continuing program for mine safety and health. Such accidents may forewarn mine operators of potential hazards, and they should thus be investigated, and remedial action should be taken regardless of whether actual injuries occurred.
S.Rep. 95-181, 95th Cong., 1st Sess. 29, reprinted in [1977] U.S.Code Cong, and Admin.News, 3401, 3428.
In addition, the Act provides that the records shall be open for inspection by “interested persons,” 30 U.S.C. § 863(d)(1), (f), (g), (w). Congress intended this term to encompass not only those associated with the mine, but to include the public. H.R. Rep.No.91-563, 91st Cong., 1st Sess., reprinted in [1969] U.S.Code Cong, and Admin.News, 2503, 2544. This interest is adversely affected by allowing the warrant-less seizure of records from the mine offices.
Further, the records kept by the mine company are not public property. Unlike the public gas rationing coupons involved in Davis v. United States, 328 U.S. 582, 66 S.Ct. 1256, 90 L.Ed. 1453 (1945), the records of conditions in the coal mine were created by the efforts of the employees. The coal companies were not acting as custodian for public property. Rather they were creating private property subject to inspection by the public. The coal companies create the records, furnish the materials on which they are kept, and possess them on their realty for use in business.
B.
This panoply of interests leads us to conclude that it was not proper for the mine [520]*520inspector to have removed the records in the absence of specific consent or an administrative warrant authorizing such action. We do not feel, however, that the operator’s interest in the records requires their suppression, particularly in light of the statutory regulation which applies to the coal mining industry.
Although warrantless searches and seizures are per se unreasonable under the Fourth Amendment, Katz v. United States, supra, Justice Stewart explained:
[F]or the Fourth Amendment protects people, not places. What a person knowingly exposes to the public, even in his own home or office, is not a subject of Fourth Amendment protection. See Lewis v. United States, 385 U.S. 206, 210 [87 S.Ct. 424, 427, 17 L.Ed.2d 312]; United States v. Lee, 274 U.S. 559, 563 [47 S.Ct. 746, 748, 71 L.Ed. 1202]. But what he seeks to preserve as private even in an area accessible to the public, may be constitutionally protected.
It is true that under the statutory scheme, the interest which the mine operator has in the records and which was disturbed here is more akin to a property or a possessory interest, an interest which the Supreme Court has held is not necessarily sufficient to create a legitimate expectation of privacy. Rakas v. Illinois, 439 U.S. 128, 143, 99 S.Ct. 421, 430 (1978); United States v. Salvucci, 448 U.S. 83, 91-92, 100 S.Ct. 2547, 2252-53, 65 L.Ed.2d 619 (1980). At the same time we are reluctant to hold that the interest is possessory alone in view of the other values which attach to the use and maintenance of the records at the coal mine office. Nevertheless, however that interest may be described, it is a substantially diminished interest in view of the rights which the statute creates in the public and in the government. It is this consideration which leads us to conclude that even if such an interest is not entirely without Fourth Amendment protection, the remedy of suppression through use of the exclusionary rule is not appropriate.12
In conclusion, there was no unconstitutional search conducted by the MESA inspector in reaching the records. There was a seizure of property by an inspector who had broad access to it in a closely regulated industry. Since the interest which the coal companies have in the records is not at the core of Fourth Amendment protection, we find that their suppression is not justified, absent an offensive search leading to their seizure.13
Id. 389 U.S. at 351-52, 88 S.Ct. at 511 (emphasis added). The coal operator knowingly exposes the records to public scrutiny. They are open for inspection not only by the regulatory agency, but by interested persons, a term Congress intended to broadly include the public at large. H.Rep.No. 91-563. The operator in this case does not even pretend that it intended to preserve the contents of the record books as private. They were kept on a table in an area of the mine office where they could be viewed by persons “who came in or out.”11
Accordingly, the judgment of the district court is reversed.