Upon the completion of the storage lake herein contemplated, and foreverthereafter until such time as Baltimore City’s population and needs require the entire water supply, which said City is entitled to draw from the Gunpowder River, the inhabitants of Baltimore County shall be entitled to use of not more then ten millions of gallons of water per day from such lake, this allotment to include all water supplied directly by said City to consumers or users in Baltimore County, now or hereafter, through the water mains of said City or through any mains or conduits which may be or become a part of, or be or become connected with, the reservoirs, pumping stations, or water distribution system of said City. In case it shall be at any time conclusively demonstrated to the County Commissioners of Baltimore County that there is no other adequate and proper water supply for the residents of any portion of the county making application therefor, said commissioners shall have the right to adopt such measures as they may deem expedient to draw from said lake, and distribute any part or all, the remainder of said allotment of ten millions of gallons of water per day, the said County Commissioners to pay or cause to be paid to said Mayor and City Council of Baltimore such sums as may be agreed upon between them; the same not to exceed the rate of one-half cent per one thousand gallons actually withdrawn. Said County Commissioners shall further have the right and power to use in perpetuity sufficient land near such lake or reservoir upon which to locate a pumping station or stations, together with conduit connections from said lake or reservoir to a well or wells, or suction well or wells, or reservoirs, on said property and other facilities, including rights-of-way for all necessary purposes to the nearest public highway or highways, upon paying or causing to be paid, therefor to Baltimore City a clear annual rental of five per centum of the gross cost to the City of the land so utilized, said connections and pumping stations shall be located at the most convenient and feasible point or points for the withdrawal of such water at the minimum cost to the authorities withdrawing the same, all water so withdrawn is to be taken from said lake or reservoir and transported therefrom without cost or expense to the Mayor and City Council of Baltimore, the whole of such cost and expense to be borne by the authorities withdrawing the same. The work of making such connections with such lake or reservoir, and laying the pipes through said City’s property, contiguous thereto, including the location of said pumping station and other matters in connection therewith shall be done under the joint supervision and control of an official of such county authorities, and the Water Engineer of the City of Baltimore, and in the event of a disagreement between them, they shall call in, as a third arbiter, a nonresident engineer, skilled in the construction or maintenance of water works, to be selected by the Governor of Maryland, on the application of either party; in the event of their being unable to agree on such third person, the decision of any two of the board then selected to be binding on the parties. The cost of calling in such third party shall be borne equally by the parties, unless for special reasons said board shall otherwise apportion the same; provided, however, that in no event shall said County Commissioners of Baltimore County, or Baltimore County, acting through any agency whatever, farm out, assign, sublet or grant, in whole or in part, to any person, firm, joint stock company, corporation or association, except with the consent in writing of the Board of Estimates of Baltimore City, or its successors in function, the right to withdraw from said lake, use, sell, or in any way distribute or dispose of any of the water so allotted to the inhabitants of Baltimore County, it being the intent of this subheading that this right shall in the absence of said consent in writing, be exercisable solely and exclusively by Baltimore County and Baltimore City in the direct and immediate exercise of their respective municipal functions in the manner hereinbefore mentioned. P.L.L., 1915, §826LL 1927, §826N 1930, §826N 1938, §1050 1949, §654 1969, §25-12 1908, ch. 214