2019-08-27_REVISION - M2005059

• Permit No: M2005059
• IBM Index Class Name: REVISION
• Doc Date: 8/27/2019
• Doc Name: Request for Technical Revision
• From: Asphalt Specialties
• To: DRMS
• Type & Sequence: TR3
• Email Name: ECS
• Email Name: MAC
• Media Type: D
• Archive: No

Nelson Mining Resource
Integrated Noxious Weed Management Plan
August 2019
Page 1
1.0 INTRODUCTION
' This Integrated Noxious Weed Management Plan has been developed to control noxious weed
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' species within the Division of Reclamation, Mining, and Safety (DRMS) permitted boundary of the Nelson Mining Resource (Site-Figure 1). This plan identifies existing noxious weeds on the
property and known weeds in the vicinity with the potential to invade the Site. This plan contains
' noxious weed management practices, typically recommended by Colorado State University and
other weed organization professionals. Weed management practices have been tailored to the
specific weed problems identified at the Site. The weed management approach to gain control of
' the invasive species at the Site presented in this plan is based on the following concepts.
1) Weed control must be applied and evaluated over an extended period to be successful.
' 2) The basic steps of weed control include identification of weed species, locating the weed
problem, development of control and prevention strategies, implementation of those
' strategies, and ongoing monitoring to assess the effectiveness of the efforts.
3) To prevent/minimize the infestation and spread of noxious weeds,bi-annual inspections
' of the permitted area will be conducted to evaluate presence or absence, degree of
invasion, and response to previous treatments in the spring and fall of each year.
' Appropriate weed control actions shall be implemented whenever noxious weed species are
observed on the property. This plan identifies specific treatment methods and timetables. Plans
' may be modified based in new invasions of weed based on the species of concern, location and
extent of the infestation, and other pertinent factors. Development of this plan is in accordance
with Section 3.1.10 (6) of the Mineral Rule and Regulations of the Colorado Mined Land
' Reclamation Board for the Extraction of Construction Materials.
1.1 PROPERTY INFORMATION
' Property Owner Mr. Harold Nelson
Mine Operator Asphalt Specialties Co.,Inc. (ASCI)
' DRMS Permit No. M-2005-059
Site Address 6755 County Road 26 in Longmont,Weld County, Colorado
' Latitude/Longitude 40.1799150 N/-104.9256780 W
Elevation 4,797 feet above mean sea level(ft amsl)
' Permitted Acreage 73 acres
Acreage Disturbed —40 acres
' Terrain Type Grazing land and gravel pit, south of Saint Vrain Creek.
Soil Types(% of Property) Altvan loam(69.5%);Aquolls and Aquents,gravelly substratum(0.5%);
and Heldt silty clay (30.0%) — Soils are well drained with low water
' holding capacity.