Version History for U.S. Geological Survey Scientific Investigations Report 2023-5085 Updates to CE-QUAL-W2 Models for Select U.S. Army Corps of Engineers Reservoirs in the Willamette Valley Project and an Inter-Reservoir Reach of the Middle Fork Willamette River, Northwestern Oregon By Laurel E. Stratton Garvin, Norman L. Buccola, and Stewart A. Rounds ------------------------------------------ First posted online September 5, 2023 ------------------------------------------ Revised and reposted June 27, 2025 as version 1.1 Page 21. Table 7 updated. Values for subdaily, daily maximum, and daily minimum statistics were updated for both modeled and measured inflow. Page 41. In-text citation was added for appendix 2, which was added as part of revision. Page 44. In last paragraph of the Temperature subsection of the Lookout Point Lake and Dexter Reservoir Model (LOP-DEX-M) section, The goodness-of-fit statistics in first sentence were updated. Page 51, figure 19 was updated to reflect changes to Lookout Point Lake and Dexter Reservoir Model (LOP-DEX-M). Page 86. Appendix 2 added to document updates to Lookout Point Lake and Dexter Reservoir Model (LOP-DEX-M). Appendix includes brief description of updates, goodness-of-fit table for previous model, and figure with plots comparing both model versions. References and in-text citations to revised associated data release were updated throughout report. Entry in table of contents added for appendix 2.