At the time when civil works was underway on construction of Al-Hindiya Barrage (one of the important irrigation facilities in Iraq) in the end of the Ottoman era at the beginning of the twentieth century, specifically in the year 1911 AD, a brick regulator was erected in the head of Hussainya canal in the North of holy Karbala Governorate for the purpose of regulating water in it. This canal was ordered to be dug by the Ottoman Sultan 'Suleiman Kanuni' after his visit to the city in 1550 AD, so it was called the Suleiman River relative to him and named later Alhussainya river.

The regulator consists of three openings, the central one was large with a width of (3) meters, opened and closed by an iron gate, and the others on the sides, each with a width of (1.5) meters, opened and closed by wooden planks. The regulator was implemented by the British company John Jackson, according to the designs of Sir William Wilcox, with a design discharge of (15) m3 / sec, made of bricks and lights, and its gates are operated manually.

- Design details of Al-Hussainya canal: -

- Design details of The old regulator Al-Hussainya :-

The old regulator Al-Hussainya is considered one of the regulators of the Al-Hindiya barrage system and is affected by the storage levels Up-stream of the mentioned barrage.

Solving the irrigation problems:- After collapse the weir which was constructed on the Euphrates River by the French engineer Schonderfer in 1890 AD, for raising the levels of water up-stream of Al-Hindiya Barrage system, including the old Hussainiya canal, It was proposed to construct Al-Hindiya Barrage to be the only lifeline that ended the drought and the destruction of palm groves and plantations in the regions of the Middle Euphrates.

Old regulator Al-Hussainya for regulate water distributions: - The regulator is used for the purpose of regulating and distributing water by rotation along the canal of Al-Hussainya, this rotation of water varies according to the seasons of the year and the need for winter and summer crops, and according to the plans that are approved by the Iraqi Ministry of Water Resources with coordination with the Iraqi Ministry of Agriculture to irrigate the crops that planted by the canal of Al-Hussainya (Palm and citrus groves of an area of ( 32250) hectares) when the regulator was established and operated in 1913, and as a result to the modernization of irrigation facilities and the rescheduling of water distributions, the area served by the old regulator at the present time is (21875) hectares.