THE completion date for Peninsula Link is under a cloud after Lend Lease, the parent company of freeway builder Abigroup, announced it was “conducting an immediate and thorough investigation” into cost discrepancies. Last week, four senior managers were suspended over alleged under-reporting of potential losses of the freeway project, which has been plagued by wet weather since construction started in 2010. Lend Lease suspended Peter Brecht, managing director of Lend Lease’s Australian construction arm; Darrell Hendry, chief financial officer of Lend Lease’s infrastructure section; Abigroup managing director David Jurd; and Abigroup chief financial officer David Walker. Lend Lease, which acquired…