Garrigues, C. J.,

after stating the case as above,, delivered the opinion of the court.

Under the provisions of section 1, p. 238, S. L. 1887, the State Engineer, and certain county surveyors, upon the petition of Summit County, proceeded to establish the boundary line between Lake and Summit Counties, and lodged a report of the line so run with the County Clerk of Lake County. Claiming that this was not the line fixed by the Legislature, Lake County, within six! months, commenced an action, as provided by the statute, to adjudicate, settle and determine the boundary line. Summit County moved for a change of venue to Summit County, which was denied, and the question is, was the motion for a change of venue properly denied?

Petitioner argues two points: First, that the action comes within the category “in all other cases,” mentioned in section 29 of the Code, and, for this reason, should be tried in Summit County. The second is based upon the report, lodged with the County Clerk, of the line run by the State Engineer, by virtue of which it is claimed the property is presumptively within iSummit County until such time as the report of the Engineer is overthrown, therefore, the action should be tried in Summit County.

As to the first proposition, the Code provides that actions *43affecting property shall be tried in the county where the property is situated; that actions for the recovery of real property, or any interest therein, or for the determination of any form of such interest or right, shall be tried in the county where the subject of the action is situated. The subject of this action is the disputed territory alleged to be situated in Lake County, and the object of the action is to judicially define and settle the boundary line, as fixed by the Legislature. The disputed territory includes all the property within its boundaries, and such property is affected by the action, which will determine the county that has certain rights in relation thereto. A county has an interest, and a form of a right, in the property within its boundaries. The boundary affects the rights of the counties; the rights of the people therein, and property rights within the territory; the rights of the respective counties for purposes of taxation; the rights of the county to ownership and possession of, and control over, roads and highways within the territory; and the jurisdiction of courts over the trial of actions. So, we reach the conclusion that the action involves an interest in real property, that it is for the determination of a form of an interest or right in real property, and that it affects property, and should be tried in the county where the property is situated.

Upon the second point, the claim that the property is presumptively situated within Summit County, on account of the line run and reported by the State Engineer, is based upon the laws of 1887, which provide that the line so run shall be the boundary line, unless one of the counties shall, within six months from the day of filing the report, commence an action in a court of competent jurisdiction to determine and settle the line. If suit is not brought within six months, it becomes the line by force of the statute; but, if suit is brought, it has no force or effect. Lake County could accept the line contained in the report, or ignore it and bring an original action under the statute to determine and settle the line. In the latter event, no attention is *44paid on the trial to the line run by the State Engineer, and it has no force or validity as a line for any purpose. The action is not to change, correct or overthrow the boundary, but is an original proceeding to determine and establish it, as fixed by the Legislature. Gunnison County v. Saguache County, 2 Colo. App. 412, 414, 31 Pac. 183; Hinsdale County v. Mineral County, 9 Colo. App. 368, 373, 381, 383, 48 Pac. 675.

Before the case could be properly transferred to Summit County, it would have to be shown that the territory belonged to, and was within, Summit County. This is the very matter in dispute. The court could not try, and determine, the issue involved for the purpose of passing upon the piotion for a change of venue. Had the court held the line run by the State Engineer was the line fixed by the Legislature, and that the subject matter of the action lay within Summit County, it would have determined the case on motion for change of venue.

The motion for a change of venue is based upon an affidavit and the records and files in the case. The records and files in the case consist of the complaint, the summons and the sheriff’s return thereon; the affidavit adds nothing new or different. The complaint alleges that the disputed territory is situated within Lake County, and, for the purposes of the motion for change of venue, this must be taken as. true. There is no presumption that the territory is situated in Summit County on account of the line run by the State Engineer. The action being for the purpose of establishing the line, and not for the purpose of correcting, overthrowing or disproving the line run by the Engineer, there is no burden upon Lake County to prove that this line is wrong. The duty of the court on the trial is to pay no attention to such line, and adjudicate and settle the line fixed by the Legislature. The evidence on the trial may show that the line established by the State Engineer is correct. If so, it will be because it is the line as fixed by the Legislature, and not because it was run by the State Engineer.

*45Writ dismissed.

Decision en banc.

Mr. Justice Teller and Mr. Justice Denison not participating.