Attachment 9: GLCA Hite-BasisOfDesign

National Park Service

Glen Canyon National Recreation Area – Hite Launch Ramp

Project Basis of Design
April 29, 2025

Prepared by:

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

GLCA Launch Ramps Design Criteria
April 29, 2025

GLCA Launch Ramps Design Criteria
Date: January 20, 2023

I.

Introduction
In partnership with the Park, and input from other stakeholders during early listening sessions, Jacobs developed site specific design criteria to address project needs for the launch ramp concept designs.

II.
Design Standards

1. Codes

a. Local Building Codes for Arizona and Utah
i. 2024 International Building Code (IBC 2024)
ii. Building Code requirements for Structural Concrete (ACI 318-14) b. Launch Ramp Materials
i. Concrete – Building Code requirements for Structural Concrete (ACI 318-14)
ii. Steel – American institute of Steel Construction Steel Manual (AISC-14) c. Ramp and Marina
i. California Boat Launching Facilities – Design Handbook ii. UFC 4-152-07 Design: Small Craft Berthing Facilities d. Roads
i. AASHTO Green Book (GDHS 2018)
ii. Park Road Standards – National Park Service 1984
2. Loads (Dead, Live, Snow and Wind)
a. Seismic is not considered since for a slab on ground (without piles), the slab will move with the ground and there is not a structure period associated with it (different from pile-supported slab). b. However, seismic shear may need to be considered for the grade beams; further work required to confirm.
c. Load combinations (per Table 5.3.1 of ACI 318-14)
III. Environmental Conditions

1. Water level

a. Current site water level is 3535 ft. (as of January 10, 2022) b. Existing ramps were designed for a water level between 3540 to 3580 ft. c. Design low water level for this project is 350 ft.

2. Wind

a. ASCE 7-16 Basic Wind Speed 120 mph based on a Risk Category of III or IV

JACOBS GOVERNMENT SERVICES COMPANY

GLCA Launch Ramps Design Criteria
April 29, 2025

b. Wind is applied to the side of the large houseboat (described under the Vessels section for each site), which creates an overturning moment. This overturning moment is applied to the ramp as a compression load on the leeward side.

3. Atmospheric Conditions

a. Atmospheric Conditions are derived from the following NOAA stations: i. Hanksville, UT, US
ii. Moab, Canyonlands Regional Airport (CNY)
iii. Page, Page Municipal Airport (KPGA)
IV. Hite Site Design Criteria
1. Summarized below are the anticipated Hite Design Criterion for a concept level