#### SHERIDAN-KIRK CONTRACT COMPANY v. THE UNITED STATES.

[No. 30828.

Decided May 21, 1917.]

*On the Proofs.*

*Contract; supplemental contract.*— Where a supplemental contract is entered into between the Government and the contractor and the supplemental contract departs from the original document, the same being in the nature of an accommodation to *408the Government and prepared by an officer of the Government, if the same be ambiguous in its terms the court will adopt such construction as will be more to the advantage of the plaintiff.

*The Reporter’s*statement of tbe case:

*Mr. William B.*King, for the plaintiff. *King db King*were on the briefs.

*Mr. Marvin*Farrington, with whom was *Mr. Assistant Attorney General Huston*Thompson, for the defendants. *Mr. Horace S. Whitman*was on the briefs.

The following are the facts of the case as found by the court:

I. A contract was signed on May 5, 1903, between the United States, acting through Capt. William J. Barden, Corps of Engineers, United States Army, and the claimant^ and approved by the Chief of Engineers, United States Army, on May 16, 1903, whereby the claimant agreed to construct a portion of the work on the Colbert Shoals Canal on the Tennessee River in Alabama. The contract and specifications are annexed to the petition as Exhibit A.

On October 26,1903, Capt. Barden suggested to the claimant in writing that he (Barden) had under consideration a change in the plans for the construction of the upper section.., of Colbert Shoals Canal, and asked for a proposition from the claimant as to the unit prices it would be willing to make for the changes proposed; among the changes desired by the defendant were the following:

“ The elimination of the concrete wall from its upper end to a point in the neighborhood of Copeland or Bevis Branch. The reduction in the amount of concrete will be approximately 12,000 cubic yards, the length of the omitted portion of the wall being somewhere between 5,000 and 5,500 feet. The excavation or that portion of the towhead lying between the ends of the cofferdams, and acting itself as a coffer, and the construction of a cofferdam of similar style, size, and strength joining these two ends, a length of approximately 400 feet, together with the excavation of all material down to bedrock on a space of 20 feet immediately outside of the *409outer line of this closing coffer. The longitudinal cofferdams, except that portion upstream of the upper end of the canal wall, to be left in place, instead of being removed as provided for in paragraph 46 of the specifications; this to apply not only to the cofferdams of the section now being considered, but also to the longitudinal cofferdams clear clown to the guard lock. The cost of building and filling the coffer should be included in the price bid per linear foot of coffer.”

On November 3, 1903, the contractor replied in writing to the above proposition, and among other things said:

“ Complying, with your request of October 25, we submit you the following propositions: ‘ * ' * * Cofferdam, $2.50 per linear foot; type to be built, same as present cofferdam now in use. * * ”

Three thousand eight hundred and fifty-four feet of the longitudinal cofferdams referred to in the proposition of the defendant were built after the supplemental contract was entered into.

A supplemental contract between the same parties was signed on December 14, 1903, and approved by the Chief of Engineers on December 30,1903, a copy of which is annexed to claimant’s petition as Exhibit B.

II. The supplemental contract, which omitted the concrete wall at its upper end, largely diminished the amount of concrete to be placed by claimant. A cofferdam was necessary for the completion of the work prescribed by the original and supplemental contracts. Prior to the execution of the supplemental contract of December 14, 1903, it had been agreed between the parties to the contract that the contractor might allow the longitudinal cofferdam to remain if the contractor so desired. The contractor never removed any of the longitudinal cofferdam.

After this supplemental contract claimant built 3,854 feet of longitudinal cofferdam, and the same was left in place when the concrete wall was omitted. This was left in place at the conclusion of the work in accordance with the terms of the supplemental contract. It formed a component part of the ultimate structure as modified by the supplemental contract of December 14, 1903, and was essential to the plan of the work as modified by the supplemental contract.

*410III. The United States paid for the 427 feet of this cofferdam built in place of the towhead removed under the provisions of paragraph 5 of the supplemental contract, but did not pay for any more of the cofferdam left in place under paragraph 5 of the supplemental contract. The difference, amounting to 3,427 feet, built after the supplemental contract, was not paid for; 3,427 feet, at the rate of $2.50 per linear foot, the price fixed by the supplemental contract, amounts to $8,567.50.

After part of the longitudinal cofferdam had been built, and monthly estimates had been made which did not include the part so built, the contractor in the year 1906 orally requested the engineer in charge of the work by whom the monthly estimates were prepared to make estimates for said work; and on February 13, 1907, the claimant company by its secretary addressed a letter to the defendant’s engineer in charge, in which he stated that in recently going over the contracts of claimant he had found the said supplemental contract and claimed that it provided for payment for the cofferdam “ that is built when the concrete river wall is omitted, at $2.50 per linear foot.” He requested said engineer to make estimates to cover said amount. The said letter was replied to by the engineer, who stated that said claim was erroneous, and that the agreement to pay $2.50 per linear foot for cofferdam applied tp about 400 feet of additional cofferdam referred to in the supplemental contract, and that payment for that had been made under the estimate for January, 1904. A considerable portion of the rock clam or dump in which the cofferdam in question was left was completed several months before any demand was made for payment for the cofferdam. The cofferdam in question was constructed in 1904, 1905, and 1906. The claim for payment was made before the work was completed.

IY. Some time after the expiration of the contract period for the construction of this work, while it was carried on under extensions of time granted by the Chief of Engineers, a not unreasonable number of inspectors was placed on the work. Charges for their services were made and deducted from the sums allowed the claimant, in accordance with the terms of the contract.

*411Hat, Judge,

delivered the opinion of the court:

This is a suit brought by the Sheridan-Kirk Contract Co. against the United States for the sum of $8,576.50. The plaintiff bases its suit upon the provisions of two contracts. The original contract was entered into on May 5, 1903, and provided for building a section of the Colbert Shoals Canal in the Tennessee Diver. The second contract was a modification of the first and was entered into by the parties on the 14th day of December, 1903. Under the first contract the plaintiff contracted to build a concrete wall on the edge of the river parallel with the south bank to form the boundary of a canal which was cut in the river and bank. Among the .specifications attached to and made a part of the first contract were the following:

> “45. *Cofferdam.*— Should a cofferdam be necessary in the construction of the lock or other work, it shall be built and maintained by the contractor at his own expense, its cost being included in his bid on other parts of the work; it may be of any design that shall be approved by the engineer.

> “46. *Removal of cofferdam.*— When the necessity for the cofferdam shall have ended, the contractor will be required to remove at his own expense all the material composing it, and to leave the river unobstructed to its full depth. The time and manner of such removal and the place of deposit of all waste material shall be prescribed by the engineer.”

After the work had commenced and the contractor had built a series of longitudinal cofferdams, the Government proposed to the contractor to modify and change the plan so that for about a mile from the head of the canal the concrete wall should be abandoned. This new plan greatly reduced the amount of concrete. This new plan was contained in a proposition in writing made by the United States to the contractor and among other things therein contained was the following:

> “The excavation of that portion of the towhead lying between the ends of the cofferdams, and acting itself as a coffer, and the construction of a cofferdam of similar style, size, and strength joining these two ends, a length of approximately 400 feet, together with the excavation of all the material down to bedrock on a space 20 feet immediately outside of the outer line of this closing coffer. The longi*412tudinal cofferdams, except that portion upstream of the upper end of the canal wall to be left in place instead of being removed, as provided for in paragraph 46 of the specifications. This to apply not only to the cofferdams of the section now being considered, but also to the longitudinal cofferdams clear down to the guard lock. * * * *The cost of building and filling the coffer should be included in the price bid per linear foot of coffer.'1’’*[Italics ours.]

This proposition was made to the plaintiff by the defendant on October 26, 1903. On November 3, 1903, the plaintiff replied to this proposition by accepting the same in substance and stating:

> “ Cofferdam, $2.60 per linear foot. Type to be built the same as cofferdam now in use.”

On December 14, 1903, the supplemental contract was executed ; this contract embodied the propositions above recited and its terms are in part as follows:

> “ The longitudinal cofferdam, where the concrete wall is omitted, will be left in place. The portion of the towhead lying between the ends of the present cofferdam and acting as a coffer, approximately 400 feet long, shall be removed and a coffer built of similar style, size, and strength to that now in place.”

and as to compensation the supplemental contract provides:

> “ Cofferdam, two dollars and fifty cents ($2.60) per lineal foot.”

The plaintiff claims that under this supplemental contract of December 14, 1903, it is entitled to receive payment at the rate of $2.50 per lineal foot for 3,854 feet of longitudinal cofferdam where the concrete wall was omitted and which was built after the contract of December 14, 1903, was entered into. In other words, that the supplemental and not the original contract governs the transactions of the parties as to the building of and compensation for cofferdam constructed after the date of the supplemental contract.

It is clear that under the original contract the plaintiff was not bound to perform the work by building cofferdams. It was optional with him as to what method he would use. Under the supplemental contract he was compelled to build *413cofferdams and to build them in a specified place. Thus a new condition was created and a new contract was made between the parties. Nor does the supplemental contract confine the compensation to be paid for building cofferdam to any specified part of the cofferdam nor to any separate or distinct cofferdam; but after providing for the building’ of a longitudinal cofferdam where the concrete wall is omitted, and another cofferdam approximately 400 feet long of similar size, and so forth, the contract provides compensation for cofferdam $2.50 per linear foot. The court can not put words in the contract which the parties to it have left out. If it was intended that compensation should only be had for the cofferdam which was approximately 400 feet long and not for the longitudinal cofferdam, it would seem that the parties would have inserted such a provision in the contract.

The matter in issue is, therefore, what part of the cofferdam is to be paid for by the defendant, under the terms of the contract. It must be determined by a sound construction of the supplemental contract. It is evident that the language of the contract does not convey a very clear meaning and is, with regard to this matter, ambiguous. The change made by the supplemental contract departs from the original contract, and that change was made at the request of the engineer officer of the Government. It was therefore for the accommodation of the defendant. It is a well-settled principle that where a contract is prepared by an officer of the Government, and is ambiguous in its terms, that construction must be adopted which is more to the advantage of the claimant. *Otis*v. *United States,*20 C. Cls., 315-327; 9 Wall., 407. In *Edgar & Thompson Works*v. *United*States, 34 C. Cls., 205-219, the court says, “It is a most familiar principle of Irav that the words of an agreement are taken most strongly against the party who prepared it, and if any liberality is to be indulged in it will be in favor of the party Avho merely signs and not the party who signs and prepares the instrument for execution,” citing 7 Wallace, 688, and 24 C. Cls., 387. The defendant having failed to make the contract clear, and there being ambiguity and uncertainty *414as to tbe meaning of the contract in this case, it must be construed in favor of the plaintiff.

The plaintiff, in making answer to the defendants’ proposal for a change in the work, distinctly stated that it would charge $2.50 per linear foot for building cofferdam.

This proposition of the plaintiff was embodied in the supplemental contract. The plaintiff made a demand for payment for the work done on the cofferdam. In view of the wording of the contract of the parties and all of the surrounding circumstances, the court can not do otherwise than come to the conclusion that the plaintiff is entitled to be paid for the number of feet of cofferdam built after the supplemental contract was entered into.

It follows that the plaintiff is entitled to a judgment for the sum of $8,567.50; and it is so ordered.

BarNey, Judge, and Campbell, *Chief*Justice, concur.

Booth, *Judge,*did not participate in the decision of this case.

DowNey, Judge,

dissenting:

After a very careful consideration of this case in an attempt to reconcile my views with those stated I find that I can not do so without too great violence to my own convictions. I am persuaded that it was the intention of the parties, and within a proper construction of the supplemental contract, that the contractors should be paid only for the 427 feet of cofferdam constructed across the towhead and not for the other cofferdam required to be left in the completed work.

Under the original contract cofferdam, if necessary, was to be built by the contractor at his own expense, its cost to be included in the prices bid on other parts of the work. By the next section of the specifications, made a part of the contract, the contractor was *required*to remove the cofferdam at his own expense. It is not necessary that I should discuss the question as to the necessity for the use of a eoffer-dam in the construction of the work, since the findings very properly state that “ a cofferdam was necessary for the completion of the work prescribed by the original and supplemental contracts.” It follows, therefore, that the original *415contract in effect required the contractor to build the necessary cofferdam at his own expense, including his compensation therefor in his prices bid on other parts of the work, and required him to remove it at his own expense.

It is quite apparent that the required removal of the cofferdam was a burden on the contractor rather than a benefit. The character of its construction, if nothing else, would indicate this. That there would be large quantities of waste material to be disposed of in connection with its removal is apparent from the character of its construction and is also indicated in the specifications. The salvage in materials must, of necessity, have been small and no doubt less than the cost of removal. Mr. Sheridan, in his testimony, attempts to show that materials composing the cofferdam would have been of value over and above the cost of removal, but a careful examination of his testimony in this respect must lead to the conclusion that it is entitled to but little, if any, weight, and he finally, contrary to this contention, specifically admits upon cross-examination that it would have been a hardship to be compelled to remove it. The findings correctly state that “ the contractor never removed any of the longitudinal cofferdam,” and this fact must be taken in connection with the further fact that there were portions of the cofferdam which they were not required by the supplemental contract to leave in place and which they might have removed had they seen fit. The findings also show that prior to the execution of the supplemental contract it had been agreed between the parties that the contractor might allow the cofferdam to remain. After that agreement and before the execution of the supplemental contract the contractors had for their own purposes dumped waste rock from the excavation against the cofferdam, rendering its removal practically impossible. What has been said indicates the conditions existent with reference to the cofferdam under the original contract and up to the time of the execution of the supplemental contract, and if the plaintiff is to recover in this action it must be because the supplemental contract changed the whole situation with reference to cofferdam necessarily to be built by the contractors for their own pur*416poses in connection with the construction of the work and at their, own expense.

The supplemental contract recites “that with the object of securing the construction of about 1,500 feet additional concrete river wall downstream to the lock by the substitution of a rock-fill dam with rubble masonry toe for about 5,500 feet of the upper end of said wall, the following changes shall be made in the agreement entered into by said parties of the first and second parts on the third day of May, 1903, **** * all the other terms and conditions of which agreement remain unchanged.” Paragraph 1 then prescribes the river wall at the upper end to be omitted, to the approximate length of 5,500 feet, with a reduction in the amount of concrete of approximately 12,000 cubic yards. Paragraph 2 provides for the extension of the concrete river wall downstream. Paragraph 3 prescribes the method of construction of the toe wall along the line of the omitted concrete wall, and paragraph 4 prescribes the method of construction of the rock dam where the concrete wall is omitted.

At that time a part of the longitudinal cofferdam along the portion of the work where, under the original contract, the 5,500 feet of concrete wall was to be built had already been constructed under the provisions of the oi’iginal contract and for the contractor’s own purposes, and, as stated above, the contractors had dumped waste rock against a part of it, indicating even then not only that it was the intention to leave it, but that it was to the advantage of the contractors to be permitted to do so; and this rock thus dumped finally became a part of the rock dam or dump substituted for the concrete river wall under the modified plan and its then existence is recognized by and is the explanation of the requirement in paragraph 4 of the notice to contractors for “the more careful construction of the dump of waste rock.” The portion of the cofferdam already constructed was, by the supplemental contract, not simply permitted to remain in place at the option of the contractor as had already been done, but was required to be left in place in the completed work and this cofferdam built before the execution of the supplemental contract and against which waste rock had been *417dumped and that built after the execution of the supplemental contract, all built primarily for the same purpose, a necessary means to the construction of the other work, thereafter entered alike into the modified construction, although no claim is made for the cofferdam already constructed when the supplemental contract was made. Paragraph 5 of the supplemental contract provided that “ the longitudinal cofferdam, where the concrete river wall is omitted, will be left in place.” This paragraph also provided for the construction of a cofferdam of approximately 400 feet in length and of similar style, size, and strength to the cofferdam already in place across the towhead, where it had not theretofore been contemplated that any cofferdam would be required, since the towhead itself acted as a cofferdam.

Paragraph 6 provided “ that as full compensation for making said changes and supplying all the materials and labor necessary for doing said work, the said Sheridan-Kirk Contract Company shall be paid the following prices:

> “ Rock excavation, after December 1, 1903, where the maternal excavated is used as described in paragraphs 1, 3, and 4, to form a rock fill dam with rubble masonry toe, to replace the concrete wall, two dollars and thirty-three cents ($2.33) per cubic yard.

> “ Cofferdam, two dollars and fifty cents ($2.50) per lineal foot.

> “All other rock excavation and additional earth excavation and concrete will be paid for at the unit prices specified in the original contract.”

It should be noted that outside of the question of payment for longitudinal cofferdam, other than that required to be built across the towhead, these provisions of the supplemental contract afforded compensation to the contractors for any loss of profits accruing to them by reason of the lessening of the amount of concrete river wall to be built and for any other expense properly to be incurred by them in connection with the prosecution of the work under the supplemental contract in lieu of that provided for in the original contract. One of these provisions gave to the contractors $2.33 per cubic yard for rock excavation as against a price of $1.98 ■provided for in the original contract, by virtue of which in*418crease in price the contractors were paid $45,960.95. This paragraph of the supplemental contract also permitted the contractors to use crusher dust instead of sand in all concrete and mortar, a concession which, under the conditions existing at this locality, was of value to the contractors. These provisions of the supplemental contract also provided payment to the contractors, at least, for the construction of the cofferdam across the towhead at the rate of $2.50 per lineal foot. The question is whether it provided that the contractors should be paid $2.50 per foot for the other longitudinal cofferdam necessary for their own purposes under both the original and supplemental contracts.

It is to be borne in mind that the supplemental contract did not supersede the original contract, but that it simply modified it, leaving all the other terms and conditions of the original contract unchanged, and it follows, necessarily, that the contract for consideration in determining the question is not alone the supplemental contract, but it is both contracts construed together.

It is found, as a fact, and is unquestionably true, that the construction of a cofferdam was necessary for the completion of the work prescribed by the supplemental contract as well as that to be done under the original contract. To hold that under the two contracts, construed together, the United States agreed to pay the contractors $2.50 per foot for longitudinal cofferdam necessarily to be constructed by them for their own purposes, is to hold that the United States deliberately abandoned the provision of the original contract expressly requiring the contractor to construct such cofferdam at his own expense and assumed, with no apparent reason therefor, the burden of paying $2.50 per foot for that cofferdam. There is no doubt about the fact that a cofferdam was required for the construction of one class of work just as it was required for the construction of the other class of work, and there is no possibility of doubt about the fact that when this supplemental contract was made it was made in the light of knowledge upon the part of both parties that the contractor was required, for his own purposes, to build this cofferdam as a necessary prerequisite to *419the construction of the work itself and to build it at his own. expense. There was a reason for the provision in the contract with reference to the payment of $2.50 per foot for cofferdam. That reason is found in the fact that the conditions were changed by the supplemental contract to the extent that the contractor was required to build the cofferdam across the towhead where theretofore he had not been required to build it and where the construction of the work as originally provided for did not require that he should have a cofferdam.

The supplemental contract changed the conditions with reference to the removal of the cofferdam after the completion of the work, and required that the cofferdam should be left in place. It is false logic to argue that because the supplemental contract required the contractors to leave the longitudinal cofferdam in the completed work, the supplemental contract therefore required the contractors to build the cofferdam, and inferentially provided for payment therefor. The requirement as to the building of the longitudinal cofferdam, otherwise than that across the towhead, is found not in the supplemental contract, but in the necessities of the work itself. That necessity existed under the original contract and it continued to exist under the supplemental contract as a necessary adjunct to the construction of both classes of work, and it is the necessities of the case, recognized at the time by both parties, which required the construction of this longitudinal cofferdam and not the supplemental contract.

The removal of the cofferdam after the completion of the work, I submit, was a burden upon the contractor and not a privilege. The specifications themselves, in the terms used, indicate that it was a requirement as against the contractor and not a privilege extended to him, and common knowledge, with reference to such construction as that described in the record in this case, is thoroughly satisfying upon the proposition that when there was provision in the supplemental contract for the leaving of the cofferdam in place instead of its removal it was a provision which relieved the contractors from an otherwise imposed burden. A “ hardship,” Mr. Sheridan says he would have regarded it.

*420The findings state, with reference to this cofferdam required to be left in the work, that “it formed a component part of the ultimate structure as modified by the supplemental contract of December 14, 1903, and was essential to the plan of the work as modified by the supplemental contract.” If this finding means simply that the cofferdam was an essential part of the work according to the particular plan adopted for the construction of the rock dump or dam, it is correct, since, according to this plan, the cofferdam remained in and became a part of it; but it was not essential in the sense that a rock dam or dump could not be built without it except to the extent that the contractors could not do the excavating and build the toe wall without a cofferdam to keep the water out. A rock dump or dam could of itself be built without a cofferdam in it. It was advantageous and of benefit to the work, as provided for by the supplemental contract, that the cofferdam should remain in the completed work. It gave it additional strength and stability and, in a sense, when left therein, it became a component part thereof, but it was not a necessary or an absolutely essential part of that work, except in the sense stated. But however beneficial to the work, and therefore to the United States, this cofferdam left in the work became, I submit that that can in nowise be determinative of the question. The United States can not be required to pay for the cofferdam left in the work because it was beneficial to the work, and hence of value to the United States. If it is to pay for it, it must be paid for because the contract contemplated that it should be paid for. That, I am quite sure, was not within the intention of the parties at the time the contract was made, and is not within the reasonable construction of the two contracts taken together.'

The question of a timely demand for payment for the cofferdam in question bears upon the construction the parties themselves put on the supplemental contract at the time. The contract provided, as is usual in such cases, for payment on monthly estimates of the amount of work done with the usual percentage retained. The findings show that request for an estimate was made of the engineer in charge in 1906. and that a letter was written in February, 1907, by the *421plaintiff’s secretary stating that in going over the plaintiff’s contracts he had recently found a supplemental contract, and claiming that it provided for payment at $2.50 per foot for the cofferdam “ that is built where the concrete river wall is omitted ” and requesting an estimate. I am of the opinion from the whole record in this case, the phraseology of this letter in particular, and Mr. Sheridan’s testimony as to the time he first made a request for an estimate fixed by the proper date of another circumstance, that no demand was made before the letter referred to and that the claiming of compensation for the cofferdam in question was an afterthought, but there is room for difference of opinion as to when the first demand was made, and I accept the finding in this respect for purposes of argument, and in its light must still entertain the opinion that the demand, whenever made, was an afterthought.

The finding shows that in reply to the demand by letter the engineer officer in charge stated that the provision for payment for cofferdam at $2.50 per foot applied only to the additional cofferdam referred to in the supplemental contract, and that they had been paid for that in the estimate for January, 1904, a fact not disputed. The supplemental contract was signed December 14, 1903, and approved December 30, 1903. The 427 feet of cofferdam across the towhead, including necessary preliminary excavation, must have been built in January, 1904. Assuming that the demand made in 1906 was in the middle of the year, two years and a half elapsed before there was any demand for payment for any of the other cofferdam. The findings show that the cofferdam in question was built in 1904, 1905, and 1906, and that a considerable portion of the rock dam or dump in which the cofferdam in question was left was completed several months before any demand was made for payment for cofferdam. The nature of the work, the necessity for cofferdam in the prosecution of the work, the continued progress of the work, even though slow, would certainly justify the conclusion that much cofferdam was built long before 1906.

The contractors did not have to wait until they had completed the rock dam or any part of it before claiming pay*422ment for tlie cofferdam if they were entitled to it. Tbe rock dam consisted of cofferdam, excavated rock, and toe wall. They were paid for tbe rock, not in and as a part of tbe dam, but as rock excavation at the increased price which compensated them, among other things, for putting it in the dump “ more carefully.” The toe wall was paid for as concrete at the contract price per yard. The cofferdam must be built before excavating could be done or the tow wall built. The cofferdam, if to be paid for, was to be estimated for, under the contract, each month as built, and the fact that no demand for such an estimate was made for two years or more, or even for “ several months ” after the completion of a- part of the rock dam can indicate only that the contractors did not then consider that they were entitled to any payment therefor and justifies the conclusion that demand for payment was an afterthought.

As further throwing some light upon the question, although possibly not of great importance, it is noted that in the letter written by Capt. Barden to the plaintiff company, with reference to the contemplated changes in the plans for this work, and soliciting proposal with reference thereto, the engineer officer indicates that he would like to have “ a proposition from you as to the unit prices at which you would be willing to make these changes.” After specifying the changes to be made, he says, “The longitudinal cofferdams, except that portion upstream of the upper end of the canal wall, to be left in place, *instead of being removed as provided for in par. 1¡.6 of the specifications."*Further on he states, “All the earth excavation required under (5) will be paid for at the present price of 50 cents per cubic yard ” (5) provided for the excavation of the towhead. Further, he says, “As there are only three classifications under the existing contract, namely, earth excavation, rock excavation, and concrete, and as the extra earth excavation will be taken up at the present price, it will therefore be necessary to alter only the price of rock excavation.” He concludes by saying, “ Your proposal should cover, then, an agreement to make the changes specified above at a certain increased price for rock excavation if (3) (rubble toe) be used, and another *423price for rock excavation if (4) (concrete toe) be placed; also a price per lineal foot for the cofferdam ”; and in connection with the proposal as to the cofferdam, but anterior to the last above quotation, it is said, “ The cost of building and filling the coffer should be included in the price bid per lineal foot of coffer.” These quotations indicate quite clearly, it seems to me, the respects in which changes as to the contractors’ compensation were contemplated, and to my mind it is somewhat significant that, in connection with a request for a price per lineal foot for cofferdam, which it seems to me under all the circumstances was meant to apply to the theretofore uncontemplated cofferdam now to be built across the towhead, he is informed that the cost of building and *filling*the coffer should be included in the price bid per lineal foot. The word “filling,” as used, could not with propriety refer to anything else than the cofferdam to be built across the towhead, which was not contemplated by the original contract. The cofferdam to be built under the original contract, and also under the supplemental contract, for the contractors’ own purposes and as a necessary prerequisite to the construction of the work, had to be filled before it became a cofferdam. The mere outside framework could serve no purpose alone and the filling was an essential and a component part of the cofferdam itself. There could have been, then, no propriety whatever in specifying that the contractor should fill a cofferdam which he was required to build for his own purposes and which without filling could serve no good purpose whatever. But since the cofferdam across the towhead was to be built under the provisions of the supplemental contract, and as an addition to the obligations imposed upon the contractor under the original contract, it was perfectly proper, in order that there should be no misunderstanding as to what the contractors were to do with reference thereto, that they should be notified that their bid with reference to that cofferdam should include the filling. There is one other circumstance in this connection. The clause referred to with reference to the filling of the cofferdam is disassociated from the clause directing that the bid be “ a price per lineal foot for cofferdam,” but it is asso*424ciated with and immediately follows the statement with reference to “ earth excavation required under (5),” which was clearly the excavation of the towhead' between the ends of the cofferdam, and the cofferdam which was required to be “ of similar size, style, and strength ” was undoubtedly the cofferdam to be built across the towhead. All the stipulations contained in this'letter of the engineer officer which were appropriate were carried into the supplemental contract in many instances in the same language used in the letter, and when the contract provided that the contractors should be paid certain prices, they were to be so paid “ as full compensation *for making said changes*and supplying all the materials and labor necessary for doing said work.” So far as the construction of cofferdam was concerned, there was no change in the requirements of the contract except as to the cofferdam to be constructed across the towhead. There was a change as to the final disposition of the other longitudinal cofferdam, but the requirement as to its construction remained upon the same basis as provided in the original contract.

It is conceded that the contractors were paid the contract price for the 427 feet of cofferdam constructed across the towhead and, in my judgment, they are not entitled to further compensation on account of cofferdam.