Home / GLCA Hite / Document

Attachment 5: GLCA 6914 Predesign Material-HydroanalysisModelingReport

Updated

A PDF document (5.6 MB) attached to GLCA Hite, from the National Park Service. Due Oct 30, 2026, 5:00 PM (UTC-6).

File name: B08_Attachment_05_GLCA_318878_6914_Predesign_Material-HydroanalysisModelingReport.pdf

Download the full documentSee the bid

The full file is for paid members, or buy this bid alone.

Preview

National Park Service

Hydroanalysis Modeling Report
Glen Canyon National Recreation Area Locations for Hite Launch Ramp

Draft

May 2025

Prepared by:

Jacobs Government Services Company
Greenwood Village, CO
Contract No. 140P2023D0006
Task Order No. 140P2024F0155

National Park Service
U.S. Department of the Interior
Hydroanalysis Modeling Report

List of Figures
Figure 4. Lake Power 24-month Water Level Projections (April 2025 to March 2027) . 3-4 Figure 5. Historical Water Surface Elevations – Colorado River at Hite and Glen Canyon National Recreation Area Locations for Hite Launch Ramp, Draft

May 2025
Page i

National Park Service
U.S. Department of the Interior
Hydroanalysis Modeling Report

Figure 7a. Lacustrine Sediment Thickness (feet) Accumulated between 1959 Figure 7b. Comparison of Cross Section Geometry (Looking Downstream) through Section A-A shown on Figure 7a between 1959 (Pre-dam) and 2024 in the Figure 8. Historical and Projected Water Surface Elevations – Colorado River at Hite Figure 9. Example Comparison of Colorado River Discharge (Gypsum) And Water Figure 10. Probable Future Conditions Surface Oblique View from Right (Northern) Figure 12. Comparison of Existing and Probable Future Conditions Model Surfaces .. 4-4 Figure 13. Four Example Cross Sections Comparing Existing and Probable Future Figure 18. Comparison of Existing and Probable Future Conditions Modeled Water Figure 22. Section View at Boat Ramp of Probable Future Conditions Velocity Figure 24. Section View at Boat Ramp of Probable Future Conditions Velocity at

Glen Canyon National Recreation Area Locations for Hite Launch Ramp, Draft

May 2025
Page ii

National Park Service
U.S. Department of the Interior
Hydroanalysis Modeling Report

Figure 25. Field-Measured Velocity during Free-flowing River Conditions (June 2, 2021) near Hite Bridge Showing Mid-channel Velocities Approaching 8 fps at a Figure 26. Field-measured Velocity During Free-flowing River Conditions (October 23, 2021) near Hite Bridge Showing Mid-channel Velocities Approaching 5 fps at an Figure 27. Schematic Cross Section of Boat Ramp Facing Downstream Showing Annotated Modeled High Flow (30,000 cfs) Water Surface Elevation Inundation on 16 Percent Ramp and Remaining Sediment Wedge (Black Hatched Area) in Figure 30. Historical and Projected Water Surface Elevations Relative to Minimum Fi

The beginning of the document. Download the full file to read on.

Other documents in this bid