Del. Code tit. 23 § 1501
Whoever builds or extends any wharf or wharves or landing places, filled up solid from the foundation into the Delaware River, further than by the determination and limitation by the City Council of the City of New Castle of the wharf line in front of the city upon the river, under 14 Del. Laws, c. 546, which they shall be allowed to do, or neglects or refuses to leave such proper sluice ways in the wharves or landing places (as may be necessary) in the proper places thereof, according to such limitation or determination, shall forfeit and pay for every such offense the sum of $500, besides the costs of prosecution, 1 moiety for the use of the City of New Castle to be paid to the City Council of the city, and the other moiety for the use of the person who sues for the same, and any such wharf extended beyond the limitation fixed may and shall be abated and removed by the City of New Castle.
23 Del. C. § 1501