Judicial Ditch No. 7 in Watonwan and Blue Earth counties was established by the order of the district court in April, 1913. The two counties entered into a construction contract, under which work commenced in May, 1914, and continued intermittently until the contractors ceased work in 1909. Thereupon appellant, as surety on their bond, was called on to complete the work, employed one of the contractors for that purpose, and drew upon the retained percentage of the contract price to pay him.

The drainage was unsatisfactory and, in July, 1922, appellant was notified that the work had not been done properly and that bids would be received for the completion thereof. The lowest bid exceeded the amount of the benefits as determined by the viewers, and all bids wre rejected. In March, 1923, this action was brought on the bond to recover damages for breach of contract. Bespond-ents recovered a verdict of $21,531.83, and this appeal is from an order denying a motion for a new trial.

*3921. Many assignments of error are based on rulings excluding evidence wMcb appellant attempted to introduce in tbe examination of L. E. Lambert, tbe civil engineer in charge of construction from May, 1914, to October, 1918.

Tbe original survey was tbe work of W. F. Brooks, an engineer appointed by tbe court wben tbe drainage proceeding was commenced. His plans and specifications were made part of tbe contract and tbe contractors agreed to do tbe work in accordance therewith.

Respondents’ principal witness was an engineer named Meyer, who was appointed by tbe court, after tbe work ceased, to inspect tbe work and report bis findings. He made a comprehensive report of tbe defects be discovered and testified at great length concerning tbe particulars in which tbe work failed to conform1 to tbe plans and specifications. Lambert was called to rebut tbe conclusions which would necessarily be drawn from Meyer’s testimony. While tbe work was in progress, Lambert bad Brooks’ field notes, plans, specifications and profiles, and they were before him wben be testified. It appeared that he. had laid out tbe work on tbe ground by taking levels and setting grade stakes; that much of tbe construction work was done under bis direct supervision and tbe remainder under tbe supervision of inspectors be employed; that, as tbe work progressed, be inspected the tile as it was laid and, from time to time, issued certificates to tbe contractors or their subcontractors; that be bad kept a record of bis survey and bad deposited tbe book in tbe office of tbe clerk of court, but at the time of tbe trial tbe book could not be found.

Lambert was repeatedly asked whether tbe tile was laid at tbe elevation shown by Brooks’ profiles, whether tbe elevations shown by tbe grade stakes be (Lambert) set were tbe same as those shown by the profiles, and whether tbe pipe was laid at the depth marked on tbe grade stakes and prescribed by tbe original plans and profiles. To all such questions objection was interposed on tbe ground that they called for opinions of tbe witness, and that, until bis note book was produced, there was no foundation for a conclusion *393that the tile had or had not been laid at the depth or grade Brooks had specified. We cannot agree that these questions called for the conclusion of the witness. He had personal knowledge of the manner in which the tile was laid. The absence of the note book might affect the weight of the testimony, but not its admissibility. Kies v. Warrick, 149 Minn. 177, 182 N. W. 998. To deprive appellant of the benefit of Lambert’s testimony on a vital issue in the case was prejudicial error.

Lambert knew whether the contractors had done their work in accordance with Brooks’ plans and specifications. The work was done under his supervision. It was his duty to see that it was done in the manner prescribed by the contract, and the questions called for statements of fact. The modern tendency is all in the direction of liberality in the admission of evidence. Dun. Dig. § 3312. As an illustration, see Phillips v. Menomonie H.-P. B. Co. 109 Minn. 55, 122 N. W. 874, a case where the performance of a contract was in issue and it was held that the trial court, in its discretion, might allow a party to testify that he had performed the contract, if the answer amounted to no more than a mere shorthand rendering of the facts.

Certain question's of law, fully argued in the briefs, will come up again when the case is retried. ' It seems desirable that we should state our views as to some of these questions.

2. Appellant attempted to prove that the contractors dug the ditch to a depth and laid the tile at the level indicated by the grade stakes set by Lambert. The court ruled that such evidence was inadmissible, unless it was shown that the grade shown by Lambert’s stakes was the same as the grade shown by Brooks’ profiles and required by the contract. The ruling was correct. The provisions of the contract relative to directions given by the engineer did not relieve the contractors from their obligation to do the work in accordance with the plans and specifications.

Brooks was the engineer appointed by the court to make the survey and prepare the plans and specifications. These were the plans to which the court gave its approval. They were the bases *394for the assessment of benefits. The contractors’ bid was based upon them. The contract obligated the contractors to dig the ditch and lay the tile in' accordance with their requirements. The engineer had no authority to modify them during the progress of the work without the consent of the court. G. S. 1913, §§ 5526, 5555.

Defendant takes the position that, if it could show that the tile was laid at the depth indicated by Lambert’s grade stakes, it need not go-further and «how that this was the depth required by Brooks’ specifications and profiles. The court is of a contrary opinion. Neither Brooks nor Lambert had any authority except such as was conferred on them by the statute. Lambert had certain duties to perform while supervising the work of the contractors. His duties were defined by the statute. In discharging them he represented the two counties. Seastrand v. D. A. Foley & Co. 135 Minn. 5, 159 N. W. 1072. His authority was derived from the law. He had no authority to direct the contractors to do the work in any other manner than thej law required. By statute, as well as by the express terms of the contract, the contractors were bound to do the work in the manner specified in Brooks’ survey and report. When they notified the engineer that they had completed the job, it became his duty to inspect the work and, if he found that they had completed it according to the contract, plans and specifications, it was his duty to report that fact to the court and give the contractors a certificate to that effect. G. S. 1923, § 6694.

The limited authority of the engineer is shown by the last proviso of the section, which declares that none of the certificates issued by the engineer under the drainage law shall constitute prima facie or other evidence of the truth of the contents thereof, or of the ful-filment of the contract. In referring to this provision, it was said in State v. Clarke, 112 Minn. 516, 128 N. W. 1008, that Hie engineer is not clothed with authority to relieve the contractor from a substantial performance of the contract, and Gilbertson v. County of Blue Earth, 145 Minn. 236, 176 N. W. 762, is to the same effect.

We hold that defendant could not escape liability by a mere showing that the ditch was dug and the tile laid at the depth and *395or the grade indicated by tbe stakes set by Lambert and that, to defend successfully on the ground that tbe contractors bad fulfilled tbeir obligation, it was necessary to show that tbe work bad been done as provided by tbe contract and by Brooks’ plans and specifications.

Tbe answer to tbe suggestion that such a ruling will place contractors at tbe mercy of incompetent or dishonest supervising engineers is that they may sue on tbe engineer’s bond to recover tbeir damages, and that tbe engineer is not tbe representative of tbe property owners who must pay for the work and who have a right to insist that it shall be done in substantial compliance with tbe original survey and report upon which tbeir assessment was based.

We are not concerned with tbe rules applicable to building contracts in general. A drainage contractor is bound by tbe provisions of tbe drainage law. Drainage proceedings are special proceedings and we must look to tbe pertinent provisions of tbe statute and not to tbe common law to ascertain tbe rights and duties, of contractors.

3. The contractors sublet a portion of tbe work. Tbe engineer issued bis certificate to tbe subcontractor pursuant to G. S. 1923, § 6694. In reliance thereon, tbe contractors paid tbe subcontractor. For the reasons already stated, we do not sustain tbe contention that these facts estop respondents from recovering tbe cost of remedying defects in the subcontractor’s work.

4. An open ditch through Law Lake was changed to a tile drain. This was done pursuant to an order of tbe district court based on tbe written application of tbe engineer and with tbe consent of the contractors, but without notice to appellant. Tbe change added 10 per cent to tbe cost of the work. It was authorized by virtue of that portion of G. S. 1923, § 6678, which provides for tbe modification of tbe plans and specifications during the progress of tbe work. Tbe substance of the provision is found in tbe contract, but 2 instead of 10 per cent was written. At one time tbe statute limited the increase in cost to 2 per cent of the contract price, but, prior to tbe initiation of this proceeding, tbe statute bad been amended and the limit fixed at 10 per cent.

*396In view of the rule that a contract made in the course of a proceeding under a statute is presumed to have been made with reference to the provisions of the statute and that such provisions .are to be read , into the contract, Bohn v. McCarthy, 29 Minn. 23, 11 N. W. 127, and in view of grave doubt as to the power of the parties to the contract to deprive the engineer and the court of the right to exercise the authority expressly conferred by section 6678 for the evident purpose of securing an efficient system of drainage, the contract should be read in conjunction with the statute and is controlled thereby. This was conceded in the course of the argument, and the case should be tried as though the contract read 10 per cent instead of 2 per cent.

5. There are several reasons why appellant cannot escape liability on account of this change in the plan of construction. In the first place, the answer does not set up as a defense a release of liability by reason thereof. In the second place, the contract expressly provides that changes may be made. And in the third place, after notice of the contractors’ default, appellant took charge of the work with knowledge of the change, undertook to complete it, and obtained respondents’ consent to the release of the retained percentage of the contract price. This clearly amounted to a waiver of notice of the proposed change. MacLeod v. Nat. Surety Co. 133 Minn. 351, 158 N. W. 619.

The other questions discussed in the briefs require but one comment: The circumstances under which the culvert beneath the public highway was constructed, and its effect as an obstruction to the flow of water in the open ditch, should be brought out at the trial in order to give the court all the facts relative to the issue under the pleadings in respect to the culvert and the legal consequences of its construction and maintenance.

For the reasons stated above, the order appealed from is reversed and a new trial granted.

(concurring.)

Concurring in .the result, such consideration as I have been permitted to give tbe case compels me to express doubt concerning one proposition decided and another involved in tbe opinion.

1. We bold tbe engineer to be tbe duly authorized agent of the county responsible both, for tbe design, of tbe ditch and tbe supervision of its construction. Yet we are bolding tbe contractor and not tbe county liable for a dereliction of tbe engineer. (There is nothing in tbe contract requiring tbe contractor to verify tbe work of tbe engineer).

If tbe plans and specifications call for one thing and tbe engineer for another, what is the contractor to do? Assuming good faith and due care, be cannot takei tbe responsibility for saying that tbe engineer’s direction is wrong and not in accordance with tbe plans and. specifications. They are tbe work of tbe engineer and be is their proper interpreter. Tbe contract makes him tbe superintendent of tbe work. Tbe contractor is bound, contractually, to abide tbe engineer’s direction however it is expressed. Tbe stakes set by tbe engineer with tbe cross section dimensions they indicate are express directions of tbe engineer which tbe contractor is bound to follow. If the responsibility for compliance in detail with plans and specifications were divided between contractor and engineer, public work would be intolerably delayed while tbe two were finding some way to settle their disputes. To avoid any such absurd situation, tbe engineer’s directions, given and complied with in good faith, are final.

It must follow that, in case of a variance between tbe plans and specifications and tbe directions of tbe engineer, the contractor has performed bis contract if, with due care and good faith, be has complied with tbe latter. Tbe difficulty is not chargeable to any default on bis part. Tbe error is that of tbe county, committed by its representative. Where, in matters of contract, loss accrues from sucb a delinquency, it is obnoxious both to logic and morals and should be equally odious to law, to penalize tbe legally blameless party for tbe benefit of tbe one legally responsible.

*398It seems entirely beside the question that the contractor may recover on the engineer’s bond. That would be small satisfaction where a large public work must be done over at a cost many times that of the penalty of the bond of the delinquent engineer. But the bond and its attendant rights are but incidents of .the situation, wholly fortuitous and in no wise altering the question or removing its solution from the controlling principle that one is liable for the misdoings of his agent within the scope and course of the business delegated to him.

In this case, the specifications recited that the line of the ditch was- “indicated on the ground by stakes which have been set by the engineer” and provided also that “the depths and grades given by •him shall constitute- a part of these specifications.” It is open therefore to very persuasive if not convincing argument that in complying with the requirements of the engineer, expressed by his depth and grade stakes, the contractor was complying as well with the specifications, of which the requirements of the stakes were expressly and contractually a component part.

Counsel have referred us to no authorities on this point and' I have been prevented from making an independent search for them. But the general principle — that the contractor should not be held responsible legally for the fault of the engineer — is well established. U. S. v. Spearin, 248 U. S. 132, 39 Sup. Ct. 59, 63 L. ed. 166, and cases cited, inter alia, U. S. v. Utah, N. & Cal. Stage Co. 199 U. S. 414, 26 Sup. Ct. 69, 50 L. ed. 251, holding that “the contractor should be relieved, if he was misled by erroneous statements in the specifications.”

2. The opinion is not based upon but does mention section 6694, G. S. 1923, providing that any “certificate or certificates of the engineer in * * * ditch proceedings of [or] any other estimate or certificate required under any of the drainage laws of this state to be made by him, shall not constitute prima facie or other evidence of the truth of the contents thereof, or of the completion of any ditch or any part thereof by the contractor or otherwise, or of the fulfilment of the contract or part thereof.” That provision deals *399with no matter of substantive law. It concerns a rule of evidence only and attempts to deny the documents in question all evidentiary effect, notwithstanding their intrinsically ¡high probative character.

In practical operation, the contractor’s Superintendent is on the job every day working with the engineer. Any' admission, though casual, made by him during the work and in consequence of it is a part of the res gestae and remains admissible as evidence. Yet a similar statement, not casual but deliberate, in writing and legally required of the engineer, who occupies to the county a relation similar to that of the superintendent to the contractor, is by arbitrary declaration of the statute denied any weight as evidence. It can’t even be used to impeach its author.' The contractor’s records are competent and weighty evidence against him. Yet the law attempts to say that the public records, if they consist of statements in writing by its engineer, are not to be considered by the judge or jury who must try the fact. He may be impeached by a carelessly uttered oral statement, but his calculated written ones may not be so used.

May it not be beyond the constitutional competency of the state, in dealing with its rights as a contractor and possible litigant, to handicap its opponent by any such one-sided and utterly dishonest rule of evidence; one which attempts to say that its own admissions against interest, however solemnly made, shall have no weight as evidence while those of the contractor retain their former probative force? May not such handicapping of one litigant by denying it the use of such obviously relevant, material and persuasive evidence be a violation of the constitutional guaranties of due process and equal protection of law, the purpose of which is to “secure the individual from the arbitrary exercise of the powers of government, unrestrained by the established principles of private rights and distributive justice.” Bank of Columbia v. Okely, 4 Wheat. 235, 4 L. ed. 559.

The investigation and determination of litigation are judicial not' legislative functions. It is not for the lawmaking power to say what weight shall be given or that none shall be attached to evi-*400den ce which is clearly relevant, material and of obvious probative effect. The legislature may declare that certain things shall be prima facie evidence. That is but shifting the burden of proof. But it cannot make them conclusive, unless it is dealing with a matter of substantive law. How can it so far control judicial actions as to say that the latter can attach no weight to evidence which has in fact great probative force and is frequently decisive.

There is plenty of authority for this view. In Vega Steamship Co. v. Consolidated Elev. Co. 75 Minn. 308, 77 N. W. 973, 43 L. R. A. 843, 74 Am. St. 484, it was held that the legislature could not so far interfere with judicial investigation of facts as to make conclusive certificates of weight of the state weighmaster. “The legislature cannot in this manner provide for the arbitrary exercise of power, so as to deprive a person of his day in court to vindicate his rights. And the law which closes his mouth absolutely when he comes into court is the same, in effect, as the law which deprives him of his day in court.” In State ex rel. Roche v. Rogers, 97 Minn. 322 (328), 106 N. W. 345 (347), it was observed that “the control of the legislature over the subject of evidence proper is generally subject to the limitation that it must not arbitrarily forbid the investigation of facts.” In Meyer v. Berlandi, 39 Minn. 438 (442), 40 N. W. 513 (515), (1 L. R. A. 777, 12 Am. St. 663), a law was held constitutionally objectionable because of its arbitrary attempt to make certain evidence conclusive. Its effect to “preclude a party from showing the truth, would be nothing short of confiscation, of property and a destruction of vested rights without due process of law.” In Howard v. Moot, 64 N. Y. 262 (268), it was taken as conceded “that a law that should make evidence conclusive which was not so necessarily in and of itself, and thus preclude the adverse party from showing the truth, would' be void * * Dean Wigmore’s conclusion is this:

“The legislative function is separate from the judicial function-, and a statute which attempts in effect to exercise a judicial power is invalid. The judicial power involves the application of the law to concrete facts and, therefore, the investigation and establish*401ment of the facts. Any statute which prevents the judicial body from ascertaining the facts in litigation coming properly before it is ineffective.” (1 Wigmore, Ev. [2d ed.] 89).

As observed in Pleasants v. Meng, 1 Dallas, 380, 1 L. ed. 185, “the nature of evidence necessarily implies an adverse right to controvert and repel.” It ought to be clear, therefore, that one party to litigation cannot be denied the privilege of introducing highly important and possibly decisive evidence while the other party is subjected to no such restriction of his proof. The denial of due process and equal protection of the law in such cases is obvious.

The first point thus questioned has been argued both in the briefs and at the bar, but without citation of relevant authority. It is important and might prove decisive of this case. The latter point may not be of much present moment, but it is enough of a question so that it ought not to be. passed over lightly or its answer assumed. I think there should be a reargument, accompanied by more extended study of both problems than we have had the benefit of so far.