March 15 (Reuters) - Northern Dynasty Minerals Ltd NDM.TO :
* NORTHERN DYNASTY MINERALS - CO'S RFA OF FEDERAL PERMITTING DECISION CONCERNING ALASKA'S PEBBLE PROJECT CHALLENGES KEY CONCLUSIONS REACHED BY USACE
* NORTHERN DYNASTY MINERALS-RFA ASSERTS USACE'S CLAIM THAT ECONOMIC COSTS OF PEBBLE PROJECT OUTWEIGH PROJECT BENEFITS CONTRADICTS ADMINISTRATIVE RECORD