According to the Grand Junction Daily Sentinel, a project spokesman said Tuesday a few more signatures are needed.
Denver Water and nearly three dozen Western Slope water users announced the proposal last year.
Eagle County and its water districts became the first to sign in February.
Under the deal, Denver Water will contribute $25 million to western Colorado projects and limit its service area.
In return, the signers won't oppose Denver Water's proposal to expand Gross Reservoir.
(Copyright 2012 by The Associated Press. All Rights Reserved.)