2025-03-14_PERMIT FILE - M2025016 ‎(26)‎

• Permit No: M2025016
• IBM Index Class Name: Permit File
• Doc Date: 3/14/2025
• Doc Name Note: Exhibit H Natural Resources Assessment
• Doc Name: Application
• From: Raptor Materials LLC
• To: DRMS
• Email Name: JR2
• Email Name: AME
• Email Name: EL1
• Media Type: D
• Archive: No

Natural Resources Assessment
P125 Gravel Mine - Southwest of State Highway 66 and County Road 17
Weld County, Colorado

ERO Project #24-180 i
ERO Resources Corporation
Contents
Executive Summary ................................................................................................................ ii
Introduction .......................................................................................................................... 1
Project Area Location ............................................................................................................. 1
Project Background and Environmental Baseline .................................................................... 4
Project Area Description ........................................................................................................ 4
Wetlands and Other Waters of the U.S. and Waters of the State ............................................. 5
Clean Water Act Section 404 ........................................................................................................... 5
State Dredge and Fill Program ......................................................................................................... 5
Methods ........................................................................................................................................... 6
Recommendations ......................................................................................................................... 10
Threatened, Endangered, and Candidate Species .................................................................. 10
Species Eliminated from Further Consideration ............................................................................ 11
Threatened and Endangered Species Habitat ............................................................................... 12
Other Species and Habitats of Concern ................................................................................. 13
Black-Tailed Prairie Dog ................................................................................................................. 13
Western Burrowing Owl ................................................................................................................ 14
Raptors and Migratory Birds .......................................................................................................... 15
Bald Eagle ....................................................................................................................................... 16
High Priority Habitat and Big Game ...................................................................................... 17
Aquatic Native Species Conservation Waters ................................................................................ 19
Mule Deer ...................................................................................................................................... 19
Other Wildlife ................................................................................................................................. 20
References ........................................................................................................................... 20

Tables
Table 1. Wetland area, Cowardin classification, and HGM. ............................................................ 8
Table 2. IPaC resource list for the project area. ............................................................................ 11

Figures
Figure 1. Vicinity Map. ..................................................................................................................... 2
Figure 2. Existing Conditions. ........................................................................................................... 3
Figure 3. High Priority Habitat. ...................................................................................................... 18

Appendices
Appendix A Photo Log
Appendix B Routine Wetland Determination Data Forms