I. Bridges : Krdof supervisors. The important questions made in this case open into an interesting field of legal inquiry concerning the respective powers and jurisdictions of the county and city in respect to highways, streets aQq bridges. This field has been well explored by counsel whose researches have materially abridged our labors. The questions are essentially statutory, and adjudged cases in other States afford little aid, except to teach and illustrate the principles which should be applied in the construction of our various statute provisions upon the subject of roads and bridges, and the rights and powers of municipal corporations in respect thereto.
The contemplated bridge is to be a free and not a toll-bridge. It is designed to cross the Des Moines river, a large stream, several hundred miles in length, bisecting the county of Polk. The city of Des Moines also lies on *126either side of the river. To span the stream requires a structure six hundred and five feet in length, and one which, to be securely built, will involve the expenditure of several thousand dollars. The proposed bridge will, according to the contract, cost the sum of $26,000. It is not, strictly speaking, a bridge on the streets of the city, but a-bridge at the foot of Walnut street. This street, on the west side (the original town), terminates-at the river. On the east side and directly opposite, the same street, or a street of the same name, also terminates at the river. It is alleged in the answer, and presumed to be substantially true, that Walnut “is the main street and most public highway through the city, east and west, and that the bridge, when completed, will be the one over which most, if not all, the travel east and west will pass, on the State and county roads leading east and west through said city.”
In other words, the- street connects with State or county roads; and the bridge will accommodate, not simply the citizens of Des Moines, but, being upon or connecting with lines of highways running into and through the county,, it will accommodate all the citizens of the county, and the traveling public at large. •
These circumstances show that the benefits of the bridge in question will not alone be enjoyed by the city, and in view of our statutes on the subject of roads and bridges, these facts seemed necessary to be stated, that the questions decided should be properly understood.
The present case is brought to test the legality of the appropriation of $2,000, by the board of supervisors, out of the bridge fund, and the plaintiff’s argument against its legality is, in substance, this: That the fee of the streets is in the city; that-the city authorities have the sole control of the streets of the city; that the county has no power over the streets, and no duties in respect to them ; in other words, the county has no right to build a bridge of any *127character inside the limits of the municipal corporation, and therefore no power to aid others in building such a bridge. Some of these propositions may be well founded, and yet they would not authorize the conclusion contended for. We remark that the city of' Des Moines is organized under the general incorporation act, as a city of the second class. Rev., ch. 51.
It is only necessary to discuss the question whether, under the general statutes of the State, taken in connection •with the general incorporation act just referred to, the county authorities have the power to erect or aid in the erection of a bridge over the Des Moines river, at the point above described, within the limits of the city corporation. That the county authorities have this power, may be clearly shown by an examination of the statute.
No enlightened State will fail to provide a mode or system for the laying out, improvement, and keeping in repair, highways and bridges. What system has been adopted in this State? This it is necessary briefly to examine. The State, instead of undertaking this work directly, has committed it to various local or subordinate auxiliaries of government. And the provisions in respect to roads and in respect to bridges, are not in all respects the same. The county authorities alone have the power to establish highways and are invested with the general supervision thereof, including bridges. Rev. §§ 819-823; 312, 327, subd. 13,17.
For- ordinary road and ordinary bridge purposes the county is, as to their construction, amendment and repair, divided into road districts, each with its supervisor, with power to require a certain limited amount of work from all the able-bodied residents, and with power in the township trustees to levy a township road and bridge tax, to a limited amount, payable partly in money and partly in labor; the money thus realized to be expended in the *128particular road district from, which it is collected and not elsewhere. Rev., ch. 46, art. 3, Acts of T862, 190.
Now this is the provision made by law for ordinary road and bridge purposes. But if this were all, it is evident that the law would be very inadequate, so far as concerns bridges requiring an extraordinary expenditure to construct or repair them. The State is traversed by numerous water-courses or streams of considerable size, of which the Des Moines is one.
Now, if the above were the only provisions of the statute, the particular road district on the river, in which a bridge was needed, would have to bear the whole expense of its construction, or -else leave the river unbridged. This the law makers have anticipated and carefully provided for, as we shall now proceed to show, making bridges essentially a matter pertaining to the duties of the county organization.
Thus the county supervisors have express power “ To provide for the erection of all bridges which may be necessary, and which the public convenience may require within their respective counties and to keep the same in repair.” Rev., §§ 312, subd., 18; 313 (last part) 327, 819.
To enable the county to execute this duty, the statute (Rev., ch. 45, § 710) provides “ that the board of supervisors in each county, shall annually levy the following taxes upon the assessed value of the taxable property of the county: 1. For State revenue, &c. * * * * 4, For malting and repairing bridges, not more than one mill on the dollar, whenever the board of supervisors shall deem it necessary." This tax of one mill was found to be inadequate in many of the counties traversed by large streams, and hence the power was recently enlarged so as to give the right to levy a three mill bridge tax. Acts 1866, p. 80.
No such provision is made for the levy by the county of a county road tax, for the reason it may be supposed, that *129the powers above referred to, conferred upon the township trustees, would be sufficient to meet the public wants with respect to roads. It is thus seen that special provision is made to enable boards of supervisors to “ erect all bridges which may be necessary, and which the public convenience may require, within their respective counties.” Bev., § 312.
Under the above provisions, unless there is something in the act under which the city of Des Moines is organized, which takes cities and towns out of the operation of those provisions, it is undeniable that the county would have the power to construct a bridge over the Des Moines at the place in question; and if it has this power it would have the power to aid others in constructing a free bridge, especially if it did not part with its supervisory power over it when constructed. See Yant v. Brooks, 19 Iowa, 87.
ct°owSsao?d 01ties‘ And here the plaintiffs insist that the county is deprived of this power within the city limits, by section 1097 of the Bevision (section 67‘of the towns and cities act), which, enacts that “the city council shall have the care, supervision and control of all public highways, bridges, streets, alleys, public squares and commons within the city, and shall cause the same to be kept open and in repair, and free from nuisances.”
We do not think a fair construction of this general language requires us to hold that it ousts the county of the right, which we have shown it would otherwise possess, to bridge the Des Moines at the place in question.
We briefly state the reasons for this opinion:
1. Many bridges in a city are purely local, across gutters or small streams, such, for example, as Bird’s run in Des Moines, and not connected with the public highways of the county, and to these this language-may properly apply.
2. It may be, though we do not rule the point, that *130though the county shall build the bridge, yet this language will charge the duty on the city to keep .it in repair, and for that purpose gives the city authorities supervision and control over it.
S. But the chief, and it seems to our mind a most satisfactory, reason for the above opinion,. consists in, the fact that the county bridge tax* provided for by section 710 of the Revision, is levied upon all the taxable property of the county, upon that within the city the same as upon that without the city.
And the bridge fund for 1865, out of which the $2,000 appropriation in question was made, was raised, as it must be presumed and indeed is not disputed, from the taxable property of the city as well as from that ■ of the county outside of the city. The burden is equal upon the city and county. Shall we ignore all equitable considerations, and hold that there shall be equality of burden but not of benefit? Shall we adjudge that' the city has the capacity, nay, the duty, to pay but not the power to enjoy ? The law is plain that the county may levy a bridge tax upon the taxable property in the city; indeed if it levies such a tax at all, it must levy it upon the property of the whole county including the city. Rev., § 710.
The law thus obliging the citizens of Des Moines to pay a bridge tax, shall we hold them utterly disabled from participating in the advantages which are presumed to be the consideration for the tax ? Such a construction of section 1097 would* be wholly unwarrantable — the language not imperatively requiring it.
4.' A county may be able to construct.^ bridge inside a corporation, over a stream, when the town or municipal corporation, though willing, would not be able to do so. If appellants’ doctrine is correct, the county cannot construct a bridge across a river, though it construct it on the *131highway or road, if the place where the river is to be' bridged is within the limits of a town or city. The practical effect of this doctrine would be bad, and this concurs with the other considerations named in leading us to reject it as unsound.
And in this case it is to be observed that the city and county are ■ acting in concert with each other, and with public spirited citizens desirou's of further conveniences for the passage of the river which divides .the county and the city into two parts. It is true that the bridge will connect one part of Walnut street with another, but though this is a street, a citizen of the county or the State has just the same rights in it as a citizen of Des Moines — the right of way or passage, a, right which the city cannot deny or abridge, or alien. The city has the bare fee, but it is in trust for,the public; and the trustee cannot alien the trust property, or pervert it to other than the dedicated uses.
If we should be mistaken in the view above taken, as to the power and right of the county to erect public bridges on public highways inside of the city, still we cannot be mistaken in saying that it is a matter of county duty to see that bridges across the water-courses of the county are provided for.
If citizens propose to erect a free bridge (with the sanction of the authorities) for public use upon a public line 3. — aia. of travel, we cannot regard- an appropriation to aid them in so doing as an appropriation of money by the county to an object foreign to its legitimate purposes and functions.
The county of Polk could, on a public highway, bridge the Des Moine^, or aid in doing so, just above or just below the city limits. Nobody denies this.' But a bridge there would be off the line of travel, and of little use. The county highways connect with the city.. The people of the county have occasion to come to and pass through *132the city; and, in our opinion, the county authorities have the power to assist, by appropriation from the bridge fund, parties who may wish to erect a free public bridge such as the one now projected:
4. swamp EYsfr™ striction. II. "We dispose of the less important points made by the appellants, more briefly. The supervisors, as will be seen by the statement, have appropriated $7,000 from the “swamp land fund” to aid in erecting this bridge. It is now claimed, that m appropriating $2,000 more out of the bridge fund, they exceeded the limits allowed by the statute. Rev., § 312, subd. 23. The people voted the $7,000 out of the swamp land fund as authorized by section 986 of the Revision, amended by act of 1862. Laws 1862, p. 78. By this vote they consented to appropriate $7,000 of this fund to the building of the bridge in question. This imposes no restriction upon the power of the supervisors to act under another law (Rev., § 312, subd. 23), and with respect to another fund.
s_navi. gablo river. III. It is claimed by the appellants that the Des Moines is a navigable river, and no authority has been obtained from the District Court to build said bridge. Rey>) | 1252) et Seq.
If the county here be treated as the builder and owner of the bridge in question, it admits of some doubt whether the statute cited applies to free bridges constructed by the public. But however this may be, the very judicious order made by the District Court deprives the plaintiffs of all ground of complaint on this head, even if it be conceded that they, without showing some special interest in the navigation of the river, can make the objection.
IV. Again, it is urged that the $2,000 is appropriated in aid of & private enterprise, and the board had no authority to make'such an appropriation.
We see no evidence that this is a private enterprise, at least in such a sense as to prevent the board from aiding *133in the construction of the bridge. It is free, and on a line of extensive travel.
The county and city have a committee acting for them in the premises. We cannot regard the appropriation as in the nature of a donation to proprietors of a private bridge, which it may be conceded the county would have no rightful power to make. Nor do we perceive any objection to holding that the county may, if it sees fit, construct, or aid in constructing, a public bridge, on condition that private individuals, or others specially benefited, will contribute to its expense.
The order of the judge as to the terms and time of payment of this $2,000 deprives the appellants of all reasonable ground of complaint, and obviates the effect of the objectionable provisions of the contract respecting the contractors' lien for the $6,000 balance of the contract price of the bridge.
Affirmed.