Majority — Roberts J.
delivered the opinion of the Court.
The present appeal challenges a statute of Tennessee on the ground that, as construed and applied, it impairs the obligation of a contract .in contravention of Art. I, § 10 of the Federal Constitution.
March 12, 1928, National Construction Company made a contract with the State; through its Department of Highways and Public Works, for the construction of a bridge. An Act of 1917 required such a contractor to furnish a bond with surety to protect the State and to secure payment to persons furnishing materials, supplies, and. labor for the project.[1] The company executed
1 Chapter No. 74 Public Acts of Tennessee 1917 (p. 217). By § 6 (p. 223) it is provided: “. . . All contractors with whom contracts are made by the Department shall enter into good and solvent surety bond in an amount fixed .by the Department, conditioned upon the full and faithful performance of every part and stipulation of the contract, especially the payment for all máterials purchased and for all labor employed in the contemplated work. . . . Not more than ninety per cent of the contract price shall be paid on any contract until it is completed and''the work is accepted. Before final acceptance,- the contractor must furnish evidence to satisfy the Department that all the material used by him, his sub-contractors, or his agents, has been fully paid for and all laborers and other .employees working for him, his sub-contractors, or his agents, have been fully paid. When this is done, full settlement may be made with the contractor; but not until thirty days’ notice in some newspaper . . . that settlement is about to be made and notify [sic] all claimants to file notice of their claim with the Secretary of the Department. The Secretary of the Department shall withhold a sufficient sum from the contract price due to pay all claims ... of which notice is filed with him, for a reasonable time to allow claimants to sue for and prove their claims against the contractor or his agent, in some court of competent jurisdiction,”
2 Public Acts of Tennessee 1929, e. 80, pp. 173-175.
3 “Section 1. . . . , (a) ‘The Secretary of the Department (now the Commissioner of Highways and Public Works) shall withhold a sufficient sum from the contract price due to pay all claims, of which notice -is filed with him, for a period of sixty days from the date of the last advertising;'' to allow claimants to sue and prove their claims against the contractor or his agent, in some court of competent jurisdiction. In the event suit is brought against the contractor within the said siyty days from the date of the last advertising, by any claimant, the Department or its officers shall pay the amount of said claim into court. But in all cases where suits are not brought within the said period of sixty days the Secretary shall pay said sum or sums so withheld to the contractor. (b) ‘On the date set for full and final settlement with the contractor, the contractor may make proper refunding bond to the State of Tennessee for the amount of any sum or sums so held for the said period of sixty days, such bond to be approved by the Commission, whereupon the Commissioner or the Department of Highways and Public Works shall pay such contractor in full.'”
The chancellor thereafter heard the cause on the merits, found in favor of the appellant for a balance of
Upon grounds differing from those stated by the Court of Appeals, the Supreme Court affirmed the decree. It held the amendatory act retroactive and applicable to the contract of the Construction Company; and the Commissioner’s action lawful and effective to supersede and annul the contract bond.
In the course of the opinion the Court said: “. . . our construction of Chapter 80 of the Acts of 1929 does
The contention is that Chapter 80 of the Acts of 1929, as construed, releases and discharges the obligation of the appellee’s bond to pay the balance due the appellant, and that such destruction of the obligation cannot be justified by substituting a right of action on another bond without appellant’s consent. The appellant says that under the local law the bond given by the appellee is of a dual nature, running both to the State and to sub-contractors; and its execution created a direct contractual relation between the surety and those who furnished material and labor for the erection of the bridge, the obligation of appellee to appellant coming into existence at the moment the latter made its contract with the Con
4 Compare Lynch v. New York, 293 U. S. 52 .
“If we concede that the materialman’s lien in the one instance, or his recourse on the bond in the other instance, enters into'his contract and is a part thereof, and that a remedy so embraced cannot be impaired without impairing the obligation of the contract, still our construction of chapter 80 of the Acts of 1929 does not bring that statute into any constitutional difficulty. We construe the statute as regulating, after its passage, the procedure to be followed by all parties in respect to the final settlement of every highway contract, whether the contract itself was made before or after the enactment of chapter 80 of the Acts of 1929.”
This view seems to us to confuse the remedies for the enforcement of two distinct contracts involved in every similar situation. The sub-contractor has a contract with
5 City of Bristol v. Bostwick, 139 Tenn. 304 , 310, 317; 202 S. W. 61 ; Cass v. Smith, 146 Tenn. 218 , 227; 240 S. W. 778 , citing and quoting Equitable Surety Co. v. United States, 234 U. S. 448 ; Standard Oil Co. v. Jamison Bros., 166 Tenn. 53 , 55; 59 S. W. (2d) 522 .
The appellee voluntarily gave its bond. How does Chapter 80 of the Acts of'1929 affect the obligation of that contract? As construed by the Supreme Court of the State, it releases and discharges the obligation of the bond, and substitutes therefor the obligation of another bond without the acquiescence of the obligee. This is not to substitute a new for the old remedy against the surety. It is to declare the surety’s obligation unenforceable, — in short, no longer a subsisting obligation.
The respondent insists that as the appellant joined the Equitable Company, surety on the refunding bond, as a defendant, it sought to take advantage of the amendatory act of 1929 and is now estopped to question the constitutional validity of the statute. Appellant replies that the suit went upon the theory adopted by the chancellor that the amendatory act was not retroactive so as fo release the earlier bond but intended merely to substitute a refunding bond in the place of the funds retained by the Highway Commissioner which, under the original act, were also held for satisfaction of the appellant’s claim.' Such a construction of an act which had not been passed upon by any court was permissible and if, as now appears, the appellant was in error in so construing the act, the mistake cannot be made the basis of ,an estoppel. In both appellate courts the appellant insisted on its original view that the Act of 1929 did not operate to discharge the obligation of the appellee’s bond. The Appellee asserted no estoppel in either of those tribunals. Not until the decision of the Supreme Court was there a holding that the act retroactively affected the enforcibility of the bond. . Not until then was there occasion for appellant to urge that, if so construed, the act would impair the obligation of the bond. As we have indicated, the record discloses that when this construction of the act-appeared probable the appellant-promptly raised the-constitutional question. It cannot be estopped so to do by its previous insistence upon a construction which would render the statute consistent with the Act of 1917 and present no constitutional difficulty.[6] The appellee says that estoppel, a non-federal ground, adequate to
6 Compare Saunders v. Shaw, 244 U. S. 317 ; Great Northern Ry. Co. v. Sunburst Oil & Refining Co., 287 U. S. 358 , 367.
“The rule that, when the decision of a state court may rest upon a non-federal ground adequate to support it, this court will not take jurisdiction to determine the federal question, has no application where, as here, the non-federal ground might have been considered by the state court but was not-”[7]
The judgment is reversed and the cause remanded for further proceedings not inconsistent with this opinion.
Reversed..