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provided for under this Act, and it may construct in any such street, road

or alley or public highway, a water main, sewer or drain, or any appurte-
nance thereof, upon the receipt of a permit from the public authority
having conti-ol thereof, but without the payment of a charge therefor, but
in case the Chief Sanitary Engineer of the Metropolitan District and the
Roads Engineer of Baltimore County do not agree as to the issuance of

said permit, then the County Commissioners after hearing both Engi-
neers shall decide and their decision shall be final in the matter. Said
highway shall be repaired and left by the Commissioners in the same, or
a not inferior, condition to that existing before being torn up, and that

all costs incident thereto shall be borne by the Commissioners. The pro-
visions of this section shall not apply to the properties, plants, franchises
or rights of the Mayor and City Council of Baltimore or to any proper-
ties, plants, franchises and rights that may be hereafter acquired by the
Mayor and City Council of Baltimore for the protection or enlargement

of its water supply, sewerage, storm-water drainage or refuse disposal sys-
tems or any other of its utility properties.

1924, ch. 539, sec. 16. B. Co. C. (192S), sec. 342.

342. Whenever reference is made in this Act to "water supply, sewer-
age, and drainage systems," the same shall include all extensions of water
or sewerage or drainage mains or pipes.

1924, ch. 539, sec. 17. B. Co. C. (1928), sec. 343.

343. Every public service corporation, company or individual before
it or they shall begin any construction in any street, road, alley or public
highway within the Metropolitan District, shall file with the Commission-
ers a plan of such construction showing the location and depth in such
street, road, alley or public highway of the proposed main, conduit, pipe

or other structure, which plan must be approved by the Commissioners be-
fore such construction is begun; and when approved no change shall be
made in the physical location of anything shown upon said plan except
upon the approval of the Commissioners. Whenever any public service

corporation company or individual shall begin to put any such main,

conduit, pipe or other structure in any such street, road, alley or public
highway without first filing plans with the Commissioners and obtaining
the approval thereof, as above provided, or shall, without the approval of
the Commissioners, make any change in the location of such mains, con-
duit, pipe or other structure, as shown upon the plans approved by the
Commissioners, or any approved change therein, such action shall consti-
tute a misdemeanor, punishable as prescribed in Section 344 of this Arti-
cle, and the Commissioners may, when any such main, conduit, pipe or
other structure interferes with the construction or operation of their water
or sewer systems or any of them, remove the same or change the location
thereof. The provisions of this section shall not apply to the properties,
plants, franchises and/or rights of the Mayor and City Council of Balti-
more or to any properties, plants, franchises and rights that may be here-