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In page Alamgirpur:

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On excavation, the site showed four cultural periods with intervening breaks; the earliest of them represented by a thickness of 6 feet, belonged to Harappan Culture. Although kiln burnt bricks were in evidence, no structure of this period was found, probably due to the limited nature of the excavations. Brick sizes were, 11.25 to 11.75 in. in length,5.25 to 6.25 in. in breadth and 2.5 to 2.75 in.in thickness; larger bricks averaged 14 in. x 8 in.x 4 in. which were used in furnace only.[1] The date range of 2600 to 2200 B.C. (calibrated) has been proposed for the earliest level at Alamgirpur[2].