BUZZ-Australia's NRW Holdings jumps on contract win from Rio Tinto
** Civil and mining contractor NRW Holdings Ltd rises as much as 17.1 pct to its highest level since June 23
** Company has been awarded a contract from Rio Tinto (LSE: RIO.L - news) for contract mining and ore haulage
** The project, which has a value of about A$140 mln, will increase production at Nammuldi mine
** Company is the second top percentage gainer on the ASX All Ordinaries Index
** Western Australia-based group's ROE of 12.21 pct is significantly higher than the sector average of -39.23 (Reuters Messaging: .thomsonreuters.com@reuters.net)