delivered the opinion of the court:
Plaintiff had a contract with the Atomic Energy Commission for the construction of an assembly and maintenance area at the National Reactor Testing- Station in Jefferson and Butte Counties, Idaho. The contract was fully performed on January 7, 1955, several extensions of time having been, granted on account of delays for which the contractor was not responsible. During the performance of the contract and after its completion, plaintiff made various claims for increased costs and for damages, some of which were claims arising under the contract and some for alleged breaches of contract by the defendant on account of delays and other causes.
The case was referred to Trial Commissioner C. Murray Bernhardt for the taking of testimony and for a report. On February 18,1964, the commissioner issued an order defining the scope of the testimony to be taken with reference to the several claims, in the light of the Supreme Court’s opinion in United States v. Bianchi, 373 U.S. 709 (1963). The defendant now asks us to review this order.
*525Prior to United States v. Wunderlich, 342 U.S. 98 (1951), this court had held that in determining whether or not the action of the contracting officer or the head of the department was arbitrary or capricious or unsupported by substantial evidence or otherwise contrary to law, it was not confined to the evidence before the Board of Contract Appeals (which in most cases was the representative of the head of the department), but was entitled to receive evidence de novo. However, the Supreme Court in United States v. Wunderlich, supra, held that we were bound by the action of the contracting officer on claims arising under the contract unless his action was fraudulent; that is to say, unless it amounted to conscious wrongdoing. Following this decision, the Congress enacted what is known as the Wunderlich Act, being the Act of May 11,1954, 68 Stat. 81. This act in substance provided that the decision of the head of a department or bis duly authorized representative or board “in a dispute involving a question arising under such contract * * * shall be final and conclusive unless the same is fraudulent or capricious or arbitrary or so grossly erroneous as necessarily to imply bad faith, or is not supported by substantial evidence.”
Following the enactment of this statute, this court first held in Wagner Whirler and Derrick Corp. v. United States, 128 Ct. Cl. 382, 121 F. Supp. 664 (1954), that the Wunder-lich Act was designed to restore the status quo ante the decision of the Supreme Court in United States v. Wunderlich, supra, but we did not decide in that case whether or not de novo evidence was admissible to determine whether the action of the board was arbitrary, etc. However, in Volentine and Littleton v. United States, 136 Ct. Cl. 638, 145 F. Supp. 952 (1956), we explicitly held that since the purpose of Congress was to restore the status quo ante and since the practice prior to the Wunderlich decision had been to receive evidence de novo, we would continue to do so. We reiterated this position in Bianchi v. United States, 144 Ct. Cl. 500, 169 F. Supp. 514 (1959), 157 Ct. Cl. 432 (1962); but the Supreme Court reversed and held that in the determination of this question we were confined to the evidence admitted before the board. United States v. Bianchi, 373 U.S. 709 (1963).
*526In cases where the administrative record was defective or inadequate, the Court had this to say:
* * * First, there would undoubtedly be situations in which the court would be warranted, on the basis of the administrative record, in granting, judgment for the contractor without the need for further administrative action. Second, in situations where the court believed that the existing record did not warrant such a course, but that the departmental determination could not be sustained under the standards laid down by Congress, we see no reason why the court could not stay its own proceedings pending some further action before the agency involved. Cf. Pennsylvania R. Co. v. United States, 363 U.S. 202. Such a stay would certainly be justified where the department had failed to make adequate provision for a record that could be subjected to judicial scrutiny, for it was clearly part of the legislative purpose to achieve uniformity in this respect. And in any case in which the department failed to remedy the particular substantive or procedural defect or, inadequacy, the sanction of judgment for the contractor would always be available to the court. [373 U.S. 709, 717-18.]
Where the dispute “arises under the contract” the contracting officer and the head of the department have authority to decide questions of fact and the contract makes their decision thereon final and conclusive; but where the dispute involves an alleged breach of the contract, and the contractor seeks unliquidated damages therefor, neither the contracting officer nor the head of the department has jurisdiction to decide the dispute. Miller, Inc. v. United States, 111 Ct. Cl. 252, 77 F. Supp. 209 (1918); Langevin v. United States, 100 Ct. Cl. 15 (1943); Beuttas v. United States, 101 Ct. Cl. 748 (1944), reversed in part on other grounds, United States v. Beuttas, et al., 324 U.S. 768 (1944). If they undertake to do so — which they rarely do— neither their decision nor the findings of fact with reference thereto have any binding effect. This necessarily follows because they are without authority to decide the dispute. It goes without saying that a decision of any court or other agency on a matter, concerning which it has no jurisdiction has no binding effect whatsoever. Steamship Co. v. Tugman, 106 U.S. 118, 122 (1882); Coyle v. Skirvin, 124 F. 2d 934, 937 *527(10th Cir. 1942), and cases there cited. See also Petition of Taffel, 49 F. Supp. 109, 111 (S.D.N.Y. 1941).
Defendant contends that since the contract gives to the contracting officer and the head of the department authority to make findings of fact concerning all disputes, they have authority to make findings concerning a dispute over whether the contract had been 'breached. This contention cannot be sustained. The contract plainly limits their authority to make such findings to “disputes concerning questions of fact arising wider this contract.” This means a dispute over the rights of the parties given by the contract; it does not mean a dispute over a violation of the contract.
The Supreme Court’s opinion in Bianchi, supra,, restricting the evidence to be considered by this court to the record before the Appeals Board, is expressly limited to “matters within the scope of the disputes clause.” At page 714 the Court said:
Respondent has not argued in this Court that the underlying controversy in the present suit is beyond the scope of the “disputes” clause in the contract or that it is not governed by the quoted language in the Wun-derlich Act. Thus the sole issue, as stated supra, p. 710, is whether the Court of Claims is limited to the administrative record with respect to that controversy or is free to take new evidence. * * *
It is our conclusion that, apart from questions of fraud, determination of the finality to be attached to a departmental decision on a question arising under a “disputes” clause must rest solely on consideration of the record before the department. This conclusion is based both on the language of the statute and on its legislative history.
Finally, in conclusion, the Court said:
* * * We hold only that in its consideration of matters within the scope of the “disputes” clause in the present case, the Court of Claims is confined to review of the administrative record under the standards in the Wunderlich Act and may not receive new evidence. * * * [373 U.S. 709, 718.]
The opinion of the Supreme Court was thus restricted to “matters within the scope of the disputes clause.” An action for breach of contract is not within the scope of this clause.
*528However, it may be that the contracting officer and the head of the department may find a fact relevant to the settlement of a dispute arising under the contract, which fact may also be relevant on the question of the right of the plaintiff to recover for breach of contract. . What effect is to be given to such a finding ?
Let it be noted that no statute gives the contracting officer and the head of the department, or his representative, authority to decide the rights of the parties to a Government contract; their authority is derived solely from the contract between the parties. Langevin v. United States, supra, at 30.
The contract in Article 15 provides that “all disputes concerning questions of fact' arising under this contract shall be decided by the contracting officer subject to written appeal by the contractor within 30 days to the head of the department concerned or his duly authorized representative, whose decision shall be final and conclusive upon the parties thereto.” (Emphasis added.) Thus, the board’s authority is limited to disputes “concerning questions of fact arising wider this contracts It is only such disputes which the contracting officer and the head of the department have jurisdiction to resolve and on which their findings of fact are final and conclusive. The parties did not contract that their fundings of fact should he concbusvoe in suits for breach of contract. In such suits the contract does not bind a judicial tribunal to accept their findings, although they may have been relevant to a dispute “arising under the contract.”
Had plaintiff been permitted to submit the dispute over what it was claiming to a judicial tribunal established by Congress with authority to find the facts and decide the dispute, and it had done so, plaintiff, under the doctrine of collateral estoppel, would have been bound by the tribunal’s findings, both in the cause of action submitted and in a later proceeding between the same parties on a different cause of action. Commissioner v. Sunnen, 333 U.S. 591 (1948). The reason for this rule is to save the time of the courts and to protect a litigant from having to relitigate an issue previously submitted to a judicial tribunal and decided by it.
But neither the contracting officer nor the head of the department, or his representative, is a judicial tribunal ere-*529ated by Act of Congress; they derive their authority solely from the contract between the parties, and their authority is limited by the terms of the contract. That contract authorizes them to make findings and to decide disputes “arising under the contract.” It is only as to such disputes that their findings and decisions are made final and conclusive. It does not make them final and conclusive on a dispute over whether there has been a breach of the contract.
When a party submits his case to a judicial tribunal, he does so in light of the rule that its findings of fact are binding on him, not only in that litigation, but in all other litir gation between the same parties. But this rule does not apply where a contract requires him to submit his claim, not to a • judicial tribunal, but- to a person designated by the contract; in such case he does so subject only to the terms of the contract, and the effect of the findings and decision of the designated person is that set out in the contract and no more.
So, when a party appeals to a judicial tribunal to determine whether the other party has breached the contract, it is not bound by a finding of a person only authorized to decide disputes “arising under the contract,” and it is entitled to ask the judicial tribunal to make its own findings and render its decision based on those findings. Since this is the first time that recourse has been had to a judicial tribunal, that tribunal not only may, but it is obligated, to make its own findings. Never before has the contractor “had his day in court.”
For example: The contracting officer makes a change in the contract and the contractor asks for the increase in his cost as a result of the change and for an extension in time for the delay incident thereto. The contracting officer allows him a sum for the increase in cost and determines he has been delayed X days. The contractor thinks he has been delayed more than X days, but his only recourse is an appeal to the head of the department whose decision is final because this is a dispute arising under the contract. In the absence of action which is arbitrary, etc., this is the end of the matter, so far as increased costs and extension of time are concerned, *530for all findings of fact of the contracting officer and head of the department in such disputes are final and conclusive.
But the contractor still thinks he has been delayed more than X days and he further thinks the delay was so unreasonable as to amount to a breach of contract, so he sues for damages for the breach. In such an action the findings of fact of the contracting officer are not final, because this is not a dispute “arising under the contract.” It is only as to those disputes that the contract does make his findings final. In a suit for a breach because of an unreasonable delay, the court, in order to determine whether the delay was unreasonable and, hence, a breach of the contract, must determine the extent of the delay. In such a dispute the parties did not agree that the decisions of the contracting officer should be final and conclusive.
In any case we would so construe the contract between the parties, but in this case there is a compelling reason to strictly limit the contract to its precise terms. It is well known that anyone seeking a contract with the Government must be willing to agree to accept the contract drawn by the Government; indeed, the advertisement for bids so stipulates. These contracts all contain this “disputes” clause, which makes the arbiter of the dispute in the first instance the contracting officer, who is the Government’s servant and employee, and whose prime duty is to be diligent in the protection of the Government’s interests and to require that the contractor strictly comply with the terms of the contract. The transition from such a role to that of an impartial arbiter in the settlement of a dispute between himself, or his representative, and the contractor would seem to be somewhat difficult. An appeal from the findings and decision of the contracting officer is allowed to the head of the department, but he, too, is an officer of the Government, the opposite contracting party. This is an additional and a cogent reason for limiting this provision of the contract to its precise terms. See Langevin v. United States, swpra; B-W Construction Co. v. United States, supra; and Miller, Inc. v. United States, supra.
The Atomic Energy Commission’s Advisory Board of Contract Appeals in the Appeal of Utah Construction Com*531pany (Docket No. 91) recognized its lack of jurisdiction to decide or to make findings concerning damages for breach of contract. It said:
It is clear, in the light of the Board’s decision in Appeal of Claremont Construction Company (Docket No. 64), that, not only does the Contractor’s appeal on • the issue of damages raise issues solely of law, but that this dispute is as to a matter “relating to” and not one “arising under” the contract. The Board has discussed this distinction at length in both that Claremont case and in Appeal of Frontier Drilling Company (Docket No. 74). The reasoning need not be repeated here. As to this issue, the appeal should be dismissed as not within the jurisdiction of the Board.
In conclusion, we hold that in a suit for breach of contract we are not bound by a finding of fact of the Board of Contract Appeals even though that finding is relevant to “a dispute arising under the contract.”
With these general principles in mind, we proceed to consider the commissioner’s order with respect to the several claims. The commissioner divides them into these sis categories, (1) with respect to the pier drilling, (2) the concrete aggregate, (3) the shield windows, (4) the shield door, (5) the Amercoat paint, and, finally, the delay damages claim.
1. Pier Drilling Claim.
Plaintiff claims that in the drilling and excavation for “piers,” or foundation shafts for certain buildings, it encountered subsurface conditions differing materially from those indicated in the contract documents. First, it claimed additional compensation for the extra cost of drilling the “float rock” which it had encountered and which it claimed was not shown on the contract documents. This claim was denied by the contracting officer on the ground that no changed conditions had been encountered. The Advisory Board of Contract Appeals, the representative of the head of the Atomic Energy Commission, reversed and found that the float rock did constitute a changed condition but that no additional cost had been incurred by plaintiff thereby unless it was liable therefor to its drilling subcontractor. The *532claim was remanded to the contracting officer to determine the amount of the increased cost of drilling.
Certain letters have been filed with the commissioner to indicate that plaintiff did not further prosecute its claim for increased cost and, hence, neither the contracting officer nor the board allowed plaintiff any sum therefor.
The commissioner holds plaintiff is not entitled to recover in this court therefor by reason of failure to exhaust its administrative remedy. The commissioner was correct in affirming the action of the board since this question was a dispute “arising under the contract.”
Plaintiff also claims damages for delay by reason of the refusal of the contracting officer to modify the contract on account of the changed conditions encountered. Since this is an action for, breach of contract, the parties are not bound by the decision of the board and may introduce evidence de novo concerning any unreasonable delay that may have been occasioned thereby.
In United States v. Rice, 317 U.S. 61 (1942), it was held that, where a contract was modified on account of changed conditions encountered, the contractor was entitled to increased costs and an extension of time, but not to damages incident to the delay. However, where the contracting officer delays unreasonably in modifying the contract, the contractor, is entitled to recover damages for such part of the delay as was unreasonable. McGraw & Co. v. United States, 131 Ct. Cl. 501, 506, 130 F. Supp. 394 (1955), and cases cited. Here the contract was not modified until after completion of the work.
It is not apparent how this could have delayed plaintiff because plaintiff has failed to show that the changed conditions increased its costs, but if it was unreasonably delayed, plaintiff is entitled to recover for breach of contract.
2. Concrete Aggregate Olairri.
The contract allowed the contracting officer to purchase concrete aggregate from the Government’s supplies and the contractor did so. Early in the performance of the contract it was discovered that the concrete did not have the required strength and that the dirty condition of the aggregate was *533responsible therefor. To supply the necessary strength, the contracting officer required plaintiff to add one sack of cement to each cubic yard of concrete mix during the time the Government was washing the concrete so as to bring it up to specification requirements. Plaintiff submitted to the contracting officer a claim for the extra cement used and was reimbursed therefor.
More than a year after the contract had been completed, plaintiff filed a claim for additional costs incurred because of the poor condition of the aggregate. The contracting officer was of the opinion that this additional claim of the plaintiff was one for breach of contract and, therefore, one which he had no authority to decide under the terms of the “disputes” article. He also thought the claim was untimely.
Plaintiff appealed to the head of the department. The Advisory Board of Contract Appeals dismissed the claim for failure of the plaintiff to make timely presentation of it.
If this claim be one for breach of contract, as our commissioner supposes, we have jurisdiction to determine it and to receive evidence de novo.
However, assuming the claim is not for breach of contract, we cannot agree with the commissioner that the failure of the board to consider the case on its merits gives plaintiff the right to introduce evidence de novo in this court. If we decide the board should have considered the claim on its merits, we should suggest to the board that it consider it on the merits and suspend proceedings here until it has had a reasonable opportunity to do so.
3. Shield Windows Claim.
Under the original contract defendant undertook to furnish the shield windows to be installed in the building to be constructed, but by modifications 2 and 4 thereof, plaintiff was required to negotiate a contract with the Coming Glass Works for the procurement of these shield windows, which it did.1 The windows were supposed to comply with contract specifications and with the shop drawings and samples. *534Plaintiff complains that defendant unreasonably delayed in approving the shop drawings. It also says that the designated authority first approved the type II windows but that other agents of the defendant later rejected them and still later the defendant reversed its rejection and again approved them. It also alleges delay in connection with the approval of type I windows.
The plaintiff presented its claim on this item for a time extension for excusable delay and an equitable adjustment for increased costs under the Changed Conditions article of the contract. The commissioner states that he cannot determine from the record what part of the claim arises under the contract and what part of it is for damages for delay; but he concludes that the basic issue is whether or not the plaintiff was unreasonably delayed by acts of the Government. As to such claim he properly says that the decision of the head of the department is not final and de novo evidence may be introduced in this court.
Defendant’s contention that the filing of the claim for delay with the contracting officer under the Changed Conditions article forecloses plaintiff from bringing suit for damages for delay cannot be sustained. The contracting officer could only grant an extension of time for delay (United States v. Rice, supra); he could not award damages for unreasonable delay.
It appears that the board over a period of 3 days heard testimony with respect to this claim, including the claim for delays, and that the transcript of this testimony runs to 453 pages, and that many exhibits were filed; hence, the commissioner suggests that the parties might well agree to stand on this record, with permission to supplement it with respect to the delay claim to such extent as they think proper. Certainly the parties ought to desist from duplicating the administrative record but, insofar as the claim relates to damages for unreasonable delay, the parties are not foreclosed by it nor from supplementing it, if they wish.
4. Shield Door Claim.
This claim was presented under the Changes article of the contract under which the contractor asked for extra costs *535by reason of a change in the drawings and specifications. The contracting officer disallowed the claim because it was not presented within 10 days as required by Article 3 of the contract.
After completion of the work, final payment was made to the contractor and a release was signed by it from which it excepted certain claims, including this shield door claim. According to defendant’s answer, which is not rebutted by plaintiff, it released the Government “from all claims arising under, in connection with or by virtue of the subject contract and all modifications thereto with the exception of the shield window claim, the pier drilling claim, and the shield door claim, the concrete aggregate claim, and the sum of $5,606.39 which was withheld pending a decision in the Amercoat appeal.” The claim presented to the contracting officer with respect to the shield door did not advance any claim for increased costs on account of delays. If the release signed by plaintiff reads as set out in the Government’s answer, it must be said that the Government was thereby released from all claims not specifically excepted, whether arising under the contract or in breach of the contract. United States v. William Cramp & Sons, 206 U.S. 118 (1907); Watts Construction Co. v. United States, 161 Ct. Cl. 801 (1963). The exception of “the shield door claim” must have referred to the claim presented to the contracting officer. As stated, the claim did not refer to damages for delay. Hence, the commissioner is correct in saying that any evidence with reference to damages for delay on account of the shield door is inadmissible, because foreclosed by the release.
As to the claim made for extra work on account of changes made in the shop drawings, this is a claim “arising under the contract” and was within the authority of the contracting officer to determine. The contracting officer disallowed the claim because it was not presented within 10 days as required by Article 3 of the contract. The board held that a part of plaintiff’s claim for extra costs must be disallowed because it did not constitute changes under the Changes article, and as to that part which did constitute changes the board held *536that it was barred by the failure of the plaintiff to present its claim, within the 10-day period. These decisions, both of the contracting officer and of the board, were within their province. There is no allegation of arbitrary and capricious action and, hence, we have no jurisdiction to review the action of the board. It is, therefore, immaterial for the purposes of this motion that no record was made of the board’s proceedings.
5. The Amercoat Paint Claim.
In the release signed 'by the plaintiff, according to the defendant’s answer, it “excepted therefrom the sum of $5,606.39 which ,was withheld pending a decision in the Amercoat appeal.” This sum was subsequently paid plaintiff and, therefore, defendant has been relieved from all liability with respect to this Amercoat paint claim.
The Commissioner’s order of February 18,1964, is amended accordingly.
Defendant’s motion for partial summary judgment may be filed, but the same is overruled with leave to renew as to any matters contained therein not ruled upon in this opinion.
These shield windows were designed to permit observation of what was going on within the atomic reactor without subjecting the observer to radioactive radiation.