Proceeds of the Series 2015A Bonds will be used to (1) pay the costs of certain transportation projects,. The Authority is a proprietary entity and uses enterprise fund accounting to report its activities for financial statement purposes.CHABOT-LAS POSITAS JOB TRAINING, CLASSROOM. We have audited the accompanying financial statements of the Contra Costa Water Authority. As demand for bonds increases, so do bond prices and bondholder returns. Extent to which inputs used in measuring fair value are observable in the market. â–» There are parks, community centers and gardens, small businesses, and faith spaces available to serve everyone in the diverse population. The actual interest rates at which the bonds will be sold will depend on the bond market at the time of each sale. In addition, sales tax. Alameda and Contra Costa Counties in the State of California (the "State").