** WestStar Industrial WSI.AX rises 5.5% to A$0.077; marks biggest intraday pct gain since October 31
** Stock hits highest since November 25
** Construction & engineering co's unit SIMPEC wins A$4.5 million (~$3 million) contract from Fortescue FMG.AX for modification works at Fortescue's Solomon Power Station in Western Australia
** About 537,128 shares traded, 2.6x the 30-day average
** YTD, WSI slips 23%
($1 = A$1.5133)
(Reporting by Ananya Verma in Bengaluru)
((ananya.verma@thomsonreuters.com;))