HAGERMAN FOSSIL BEDS

National Park Service U.S. Department of the Interior Hagerman Fossil Beds National Monument Idaho

Cover

List of Figures

List of Tables

Executive Summary

Introduction

Existing Resource Condition

Location, Legislation and Management History
Climate
Geographic Setting
Geologic Setting
Soils
Vegetation and Ecology
Historic Land and Water Use

Hydrology

General Surface Water Hydrology and Water Quality
Lower Salmon Falls Hydroelectric Project
Bell Rapids Mutual Irrigation Company Project
Summary of Canal Leakage Studies
General Groundwater Conditions
Monitor Wells
Bell Rapids Area Groundwater Hydrographs
Fossil Gulch Area Groundwater Hydrographs and Water Level Contours
Discharge from Perched Aquifers
Groundwater Quality and Chemical Data
Water Rights
Staffing and Programs

Water Resource Issues

Role of NPS in Management of Water Resource Issues
Landslides and Perched Aquifers
Introduction of Irrigation Water to Fossil Beds
Discharge of Irrigation Water to Surface Streams
Fisheries and Aquatic Ecology in Lower Salmon Falls Reservoir
Non-native Species
Snake River/Lower Salmon Falls Reservoir Corridor Mass Wasting
Monitor Wells and Piezometers
Surface Water Quality
Baseline Inventory and Mapping
Drinking Water Supply
Wetlands Inventory
Engineered Wetland
Confined Animal Feed Operations
Proposed Research/Visitor Center
Endangered Species
Dump Site

References

Appendix 1 - PMIS Statements

Age Dating and Isotope Analysis of Landslide Water (USGS/NPS Partnership)
GIS Mapping of Water Resources
Install Groundwater Tracer Test Well
Abate Canal Leakage
Collect & Analyze Surface Water Flow from Landslides
Analyze & Quantify Reservoir Drawdown Effects from Idaho Power Operations
Collect & Analyze Water Quality Data
Inventory Agricultural Chemicals
Conduct Groundwater Tracer Tests
Inventory Rare, Threatened And Sensitive Fauna - Species
Inventory Rare, Threatened, and Sensitive Plant Species
Survey Paleontology Sites and Prepare Base Map

Figure 1. Location of Hagerman Fossil Beds National Monument
Figure 2. Management Zones
Figure 3. Sequence of rocks in the western Snake River Plain
Figure 4. Geologic map
Figure 5. Snake River Hydrograph
Figure 6. Yearly volume of water diverted by Bell Rapids Irrigation District
Figure 7. Location of Monitor Wells.
Figure 8. Monitor Well Hydrographs for the Bell Rapids Area from 1986-2000.
Figure 9. Water Level Trends for the Bell Rapids Area from 1997-2000.
Figure 10. Monitor Well and Canal Hydrographs for the Fossil Gulch Area 1986-2000.
Figure 11. Groundwater Contours.
Figure 12. Perched Aquifer Discharge Hydrographs
Figure 13. Landslide Location
Figure 14. Two Shoreline Slope Failures

Table 1. Cooperative Management Agreements
Table 2. Soil Series
Table 3. State of Idaho 303d Impaired Water Body List for Salmon Falls Reservoir
Table 4. Rates and volume of water loss from the canal by seepage
Table 5. Monitor Well Information
Table 6. Rates and Volumes of Perched Aquifer Discharge