March 29 (Reuters) - Comstock Mining Inc
* Says agreement with american mining and tunneling and american drilling corp for $5 million in underground mine development
* Services will be provided in exchange for issuance of up to 9 million shares of its common stock, at a value of at least $0.56/share Source text for Eikon: Further company coverage: (Bengaluru Newsroom: +1-646-223-8780)
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