Cost

When the reservoir begins to fill to its new, increased capacity in 2028, the project will have spanned nearly a quarter century from the start of environmental study and permitting to the end of construction. The total investment needed to finish the project, or the estimate at completion, is currently anticipated at about $464 million (in 2025 dollars). This value includes all past expenditures ($25 million as of 2017) and predicts future expenditures; accounting for expected changes due to variables like labor and commodities costs and economic inflation.

As a public agency, Denver Water is entirely funded through rates, new tap fees and the sale of hydropower. No tax dollars will be directed towards Denver Water or to the Gross Reservoir Expansion Project. The City of Arvada is a partner in the project and will contribute a portion of the funding in exchange for additional water from Denver Water.

This project is an investment on many levels – first, it’s an investment in a secure water future for Denver Water customers who live and work on Colorado’s Front Range. It’s also an investment in the local and regional economy, creating jobs and opportunity in industries beyond engineering and construction.