Pontoon bridge unprecedented 730-meter, fortified pontoon bridge across the Scheldt river at the Siege of Antwerp in 1584 to close off water access to the city. In the battle of Saraighat in 1671, the Ahoms spanned the river Brahmaputra at Saraighat over an improviso bridge of boats. In the 1670s, the French devised the copper pontoon; after this point, rivers and canals ceased to present significant obstacles. The early modern period in pontoon use was dominated by the wars of the 18th and 19th centuries during which the art and science of pontoon bridging barely changed. This however did not stop all
Junk raft 28 August 2008. On the way, they gave valuable water to record-holding ocean rower Roz Savage, also on an environmental awareness voyage, when her supplies dwindled. The construction of the JUNK Raft began in April 2008 and was finished the following month. The huge undertaking of constructing a seaworthy raft from "junk" was aided by volunteers from the environmental education programs of: Bell Elementary, Green Ambassadors, Muse Elementary, Santa Monica High School, and Westbridge School for Girls. The volunteers lent a hand by cleaning bottles, fastening bottle caps, and stuffing them into the recycled fisherman's net pontoon forms.<ref name="junkraft.blogspot.com/2008/04"></ref> Junk