Plaintiff sued the county for balances on account claimed to be due him for work performed in improving certain public roads in the county. The petition does not allege that the. work was done under an express contract further than to say that the defendant employed the plaintiff to do the work. There are two counts in the petition, the first for a balance claimed to be due for work done on Char-bonnier and Howdershell road, the second for a balance for like work on the Bonhomme road. The items .of the work and their alleged value are set out m each count in the form of an account; the items in the first count amount to $13,128.55', against wMch plaintiff avers he has received from the county $11,912, leaving a balance due him of $1,216.55; the items in the second count amount to $11,912.01, agamst which plaintiff has received $10,892.34, leaving a balance due him of $1,019.67, for which balances judgment is prayed.
The answer was a general denial as to each count and an affirmative plea that the work done was under written contracts wherein, among other things, it was provided that all measurements and estimates of amounts due plaintiff were to be made by. the commissioner of roads and bridges, whose action therein *337should be conclusive; that acting under that specification in the contracts, the commissioner did make and furnish to plaintiff and to defendant each estimates of the measurements and of the amounts dué plaintiff, and defendant has made full payment to the plaintiff of the amounts so fixed by the commissioner.
The reply was a general denial.
At the- beginning of the trial counsel for defendant objected to any evidence on the part of the plaintiff on the ground that the petition did not state facts sufficient to constitute a cause of action against the county; the point being that since a county could'not be rendered liable in such a matter except on a written contract, and this petition being in form a declaration on an implied contract, it stated no cause of action against defendant. The objection was overruled.
The evidence on the part of the plaintiff tended to prove all the items of the account as stated in the petition except the items of digging trenches for the roadbeds, which were charged in the account as double of the real amount, that is to say, in the first count this item was stated thus: “Digging trench for roadbed,, double measurement, 10,933.4 cu. yds. at 18c per cu. yd. — 1968.01;” in the second count it was: “Digging trench for roadbed, double measurement, 8936 cubic yards at 21c per cu. yd. — $1876.55-.” The price per cubic yard was correctly stated, but the number of cubic yards stated was double their real number in each count. The real controversy in the case was as to the plaintiff’s right to a double measurement in those items.
The contracts pleaded in the answer were introduced in evidence by the plaintiff, which contained the clauses in reference to the decision of the commissioner as to the estimates being final; there was nothing in the contracts about double measurement, but the specifications were that the plaintiff should be paid in *338the one instance eighteen cents and in the other twenty-one cents per cubic yard for grading.
Prom time to time during the progress of the work the commissioner gave monthly estimates to the plaintiff on which he drew pay and in the end gave him a final estimate as the balance due on the completed contracts, which did not contain the double estimate which plaintiff now claims, and he testified that when he presented the same to the county court for payment and received the payment therein called for he refused to give a receipt in full and insisted that he was entitled to the amount now claimed.
The work was not done under the immediate supervision of the commissioner, but under an assistant appointed by the commissioner.
Plaintiff had been engaged as a contractor doing this kind of work in St. Louis county for nineteen years; he was asked if it was not the usual custom to allow contractors double measurement for the kind of work for which he was claiming it, but the defendant objected to the question and the objection was sustained.
The commissioner was a witness in behalf of the defendant and he testified that it had been the custom as long as he had been in office to allow double measurement for this particular kind of work, and he testified that in point of fact the estimates he gave the plaintiff did contain double measurement. We infer that the trench for the roadbed for which double measurement is claimed, differed from ordinary grading, in that it was required to be done with greater particularity and to be done by hand instead of by machine, since it was to be the foundation for Telford pavement.
The fact in dispute was this: The commissioner who designed the road improvement estimated that the actual excavation.for the Telfoi'd should be five-tenths of a foot in depth, and he drew the profiles and plans for the contractor’s guidance showing that depth, and *339he testified that in his opinion that was the actual depth of the excavation made and that when he made the final estimate he gave the contractor double measurement of that depth, that is twelve inches. But the plaintiff testified that under the direction of the assistant commissioner the excavation was made to an actual depth of twelve inches, and the claim is for a double measurement of a twelve-inch excavation.
There were some small 'items of extra work claimed, but as to them the commissioner testified that he allowed them in the final estimate and plaintiff was paid for them.
The .trial was by the court, jury waived; the finding and judgment were for the defendant, and the plaintiff appealed.
I. The court overruled the objection of defendant that the petition did not state a cause of action against the county because it was a declaration on an alleged implied contract, -whereas the county could, only be liable under an express contract. The court ruled cor - rectly on that point, if for no other reason, because the answer came to the aid of the petition and showed that the work was done under express contracts.
II. In each contract it is stipulated: “To prevent all disputes and litigation, it is further agreed by the parties hereto, that the road commissioner shall in all cases determine the amount of work which is to be paid for under this contract, and his estimate shall be final and conclusive.”
That is a valid agreement, and a wise one to be put. into contracts of this kind, and the action of the road commissioner covered the point in dispute. His estimate of the extent of the excavation was that it was five-tenths of a foot deep and although the work was not done under his personal supervision, yet he testified that in his opinion it did not exceed that depth. That was a matter especially within his province to *340decide and his decision should be final. But he also testified that his estimate allowed the plaintiff double measurement on a basis of five-tenths of a foot.
Although the decision of the road commissioner is sufficient to justify the judgment of the circuit court, yet we feel in duty bound to express our opinion on the claim for double measurement, lest passing it over in silence should lead to misapprehension. The requirements of our statutes in regard to contracts for public work to be paid for out of the county treasury are very strict. Section 6759, Revised* Statutes 1899, now section 277'8, Revised Statutes 1909, not only requires all such contracts to be in writing, but that they shall express the consideration to be paid by the county. The county court cannot lawfully pay for work done under such a contract a greater price than is therein expressed. In Anderson v. Ripley County, 181 Mo. 46, it was held that unless the consideration is expressed in the contract the contractor cannot recover for the work done. In the case at bar the contract calls for grading in the progress of the construction or improvement of the road- and it specifies the price to be paid therefor per cubic yard, that is, eighteen cents in one road and twenty-one cents in the other. The county court would have no right, when the work was done, to pay the contractor thirty-six cents per cubic yard in the one instance and forty-two cents in the other, either for all of the grading or for a part of it. To return an estimate of twice the number of cubic yards excavated and allow payment for the double estimate at the contract price is the same as allowing payment at twice the contract price for the actual work. Custom sometimes is serviceable in interpreting a contract not clear and explicit in itself, but custom cannot authorize the county court to pay the contractor double the contract price for work done under a contract like this. If digging trenches for the roadbed is work of a different character from other grading called *341for in the contract, and costs more to execute, it can be provided for as a separate item of grading in the contract and a higher price specified, but the road commissioner cannot allow nor can the county court p,ay more for the work than the contract price.
The trial judge had the correct view of the law. The judgment is affirmed.
All concur.