LONDON, UNITED KINGDOM -- (Marketwire) -- 05/11/11 -- SANDSPRING RESOURCES LTD. (TSX VENTURE: SSP) ('Sandspring' or the 'Company') is pleased to announce the publication of an updated NI 43-101 technical report titled 'TECHNICAL REPORT, UPDATED RESOURCE ESTIMATE AND PRELIMINARY ECONOMIC ASSESSMENT OF THE TOROPARU GOLD-COPPER DEPOSIT, UPPER PURUNI RIVER AREA, GUYANA' (NI 43-101 & 43-101F1, P&E Report No. 208)'.