Open invitation to tender, deadline 18.07.2016, for environmental surveying and site soil protection during works for safety improvement in the tunnels Fasenstaub (1,459 m) and Cholfirst (1,260 m) on the N04/06+08 motorway. Duration of the contract is from 01.09.16 until 01.01.23. Further information can be found at http://www.simap.ch/shabforms/servlet/Search?NOTICE_NR=916863. Contact Ofrou, Winterthour, email beschaffung.winterthur@astra.admin.ch. Offers to be sent to Ofrou, Winterthour, attn tender N04-06 FAE — SER. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=189962-2016. Ref.n. 080152. 23/16.