Attachment 7: GLCA Hite ARDR

National Park Service

Glen Canyon National Recreation Area
Low Water Ramp at Hite District
Aquatic Resources Delineation Report
December 2024

Prepared by:
Jacobs Government Services Company

Greenwood Village, CO
Contract No. 140P2023D0006
Task Order No. 140P2024F0242

National Park Service
U.S. Department of the Interior
Glen Canyon National Recreation Area
Low Water Ramp at Hite District

List of Tables

List of Appendices
Appendix A – Figures
Appendix B – Wetland Determination Data Forms
Appendix C – Rapid Ordinary High Water Mark (OHWM) Field Identification Data Sheets Appendix D – Antecedent Precipitation Tool Results
Appendix E – Representative Photographs

Aquatic Resources Delineation Report,

Low Water Ramp at Hite District – December 2024
Page i

National Park Service
U.S. Department of the Interior
Glen Canyon National Recreation Area
Low Water Ramp at Hite District

Acronyms and Abbreviations
Acronym

Definition

AMSL

Above mean sea level

CFR

Code of Federal Regulations

CWA

Clean Water Act

D.O.

Director’s Order

°F

degree(s) Fahrenheit

FGDC

Federal Geographic Data Committee

GLCA

Glen Canyon National Recreation Area

HUC

Hydrologic Unit Code

LF

linear feet

NHD

National Hydrography Dataset

No.

Number

NPS

National Park Service

NWI

National Wetlands Inventory

OHWM

Ordinary High Water Mark

TNW

Traditional Navigable Waters

USACE

United States Army Corps of Engineers

U.S.C.

United States Code

USGS

United States Geological Survey

WOTUS

Waters of the United States

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Aquatic Resources Delineation Report,
Acronyms and Abbreviations

Low Water Ramp at Hite District – December 2024
Page ii

National Park Service
U.S. Department of the Interior
Glen Canyon National Recreation Area
Low Water Ramp at Hite District

Executive Summary
The National Park Service (NPS) is proposing to construct a new ramp to provide river and lake access at lower water levels in the Hite District of Glen Canyon National Recreation Area (GLCA). This ramp will replace an existing ramp that is inaccessible at current and anticipated lake levels due to its alignment.
This report presents the methods and results of an aquatic resources delineation for a 107.33acre study area that encompasses the footprint of the proposed new ramp at Hite District project (project). This delineation was conducted in accordance with the Corps of Engineers Wetland Delineation Manual (Environmental Laboratory 1987), the Regional Supplement to the Corps of