Slice Data

Public Utility District No. 1 of Chelan County, WA (District) is selling slice products of the Output from Rocky Reach Hydroelectric Project (RR) and the Rock Island Hydroelectric Project (RI) starting HE 0100, P.P.T. on January 1, 2018, and ending on HE 2400 (midnight) P.P.T., December 31, 2022, as more fully specified in the CONTRACT FOR SALE OF THE ROCKY REACH PROJECT AND THE ROCK ISLAND PROJECT SLICE PRODUCTS 27, 28, and 29 (Contract). Chelan County PUD will evaluate the bids based upon the amount of the bids, variations in Contract provisions, operational issues, counterparty concentration risk, and other factors as deemed appropriate in the discretion of the District.

Table 1. (Slice Product 29 is a combination of Products 27 and 28)

Delivery Period
Slice Product 27
Slice Product 28
Combined Slice Product 29
Jan. 1, 2018 - Dec. 31, 2022
2.5% of RR and RI Output
2.5% of RR and RI Output
5.0% of RR and RI Output

The successful bidder or bidders (if any) will receive a slice of the energy and capacity in the percentage amounts and delivery periods shown in the table above. The legal documents further clarify other rights and obligations associated with the slice products. Those documents can be found under the Legal Documents link on this web site.

The available Output will be net of the following:

  • Upstream and downstream encroachments, station service and losses to the Points of Delivery
  • Consumption obligations that are a project responsibility (fish hatcheries, RR bypass, etc)
  • Obligations with the Federal System associated with Immediate Spill Replacement
  • Canadian Entitlement Allocation Extension Agreement project deliveries
  • Adjustments for energy delivery rights that are a Project right under applicable laws or agreements (including but not limited to PNCA)
  • Limitations imposed by Mid Columbia Hourly Coordination, Hanford Reach Fall Chinook Protection Program, Biological Opinion, and the HCP
  • Reserves if generation is within Chelan County PUD's balancing authority

Approximate size of Slice percentages in an average water year:

Slice Product
Approximate Total Size
2.5% of Approx. Size
5.0% of Approx. Size
Rocky Reach Project and Rock Island Project Annual Energy (aMW)
1045 aMW
26 aMW
52 aMW
Rocky Reach Project and Rock Island Project Capacity
1849 MW
46 MW
 92 MW
Rocky Reach Project and Rock Island Project Pond Storage
3906 MWh
98 MWh
195 MWh

  *  The Annual Energy quantity above is projected generation based on historical stream flows and is adjusted for Canadian Entitlement Allocation obligations.  Both the Annual Energy and Capacity quantities are adjusted for encroachment energy.  The amounts stated herein are intended for illustrative purposes only and are not intended to be relied upon by the bidders. The estimates are based upon general historical numbers and events and do not reflect what the bidders can expect to receive. The Output is dynamic and Chelan County PUD makes no warranties or representations as to the amount of energy, capacity or storage that will be produced or delivered.