In 2016, we replaced 126% of production, adding 43 MMBOE of reserves, for total proved plus probable reserves of 382 MMBOE. Reserves are presented on a gross basis at year end, in accordance with National Instrument 51-101, based on evaluations from third party reserves engineers.
Our "best estimate" of unrisked contingent resources at December 31, 2016 is 293 MMBOE. This estimate includes the Marcellus, the Bakken and Three Forks, and the IOR/EOR on a portion of our Waterflood assets in Canada. These contingent resources are all classified as "development pending" maturity sub-class. Please refer to Appendix A in our most recent Annual Information Form for more detail.
Note: A portion of these locations are unbooked future net locations, which are internal estimates and have not been audited by external evaluators.