2021-10-29_PERMIT FILE - M2021064 ‎(6)‎

• Permit No: M2021064
• IBM Index Class Name: Permit File
• Doc Date: 10/29/2021
• Doc Name: Application
• From: C & J Gravel Products, Inc
• To: DRMS
• Email Name: LJW
• Email Name: THM
• Media Type: D
• Archive: No

G-1. SURFACE WATER (STORM WATER) MANAGEMENT:
SURFACE WATER MANAGEMENT PLAN
TASK: Protect surface water on and downstream from operations
CONDITIONS:At the Oakbrush Hill Gravel operations on Dutton Ranch, during mining and related
operations, involving clearing or leveling more than 5 acres of land, in Archuleta County(in the
Martinez-Stollsteimer Creek drainage of the Piedra River Watershed),
STANDARDS: In compliance with Colorado's storm water discharge rules (5 Colo. Code Regs. § 1002-
61.32 and 25-8-202 CRS),State stormwater discharge permit COR-500000 conditions, applicable
Archuleta County requirements, landowner requirements, and good engineering and environmental
practices,employ all available and practical methods which are technologically feasible and
economically reasonable in order to minimize erosion,sedimentation, contamination, heating, and
other negative impacts on Waters of the State and United States,to include:
1. Prevent discharge of any water-priority chemicals or hazardous materials which would impact
water quality,
2. limit discharge of warm water into cold water habitats,
3. prevent erosion and sedimentation of soil, including disturbed areas, areas being reclaimed, and
discharge of mud and dust tracking on public roadways, while reducing sources of airborne dust
from being transported off the property(including haul roads and haul vehicles),and
4. aid stability of reclaimed land.
In accordance with information in Colorado Discharge Permit System (CDPS) Form Application (Notice of
Intent)for Sand and Gravel Mining and Processing Operations, Land Development, and/or other
applicable forms to obtain coverage and the Stormwater Discharge General Permit for Sand and Gravel,
and in accordance with Colorado Water Law.
PERFORMANCE MEASURES:
1. Understand the potential for water contamination,including:
a. Information about the watershed and downstream receptors of water pollution,
b. Understanding the effects of contaminating water by sediment as well as water priority
chemicals,including environmental damage,impact on human health,and potential
penalties,
c. Understanding potential sources of water pollution and actions to prevent those sources from
contaminating water,
d. Understanding and identifying water priority chemicals and other materials stored,used,
and/or generated on-site and how to properly handle those materials.
2. Prevent any surface discharge of any water under conditions including and up to a 100-year-frequency
storm of 3.7 inches in 24 hours by:
a. Constructing and maintaining perimeter swales and berms to prevent run-on and runoff of
storm water,including snow melt.
b. Constructing and maintaining basins to collect runoff on the disturbed area to capture
sediment and prevent surface discharge outside the perimeter.
3. Minimize evaporation of surface water by:
a. providing drainage and detention/infiltration basins to allow water to infiltrate into
permeable,undisturbed soil and rock.
b. Maintaining basins as deep as possible compatible with safety,and disturbing sediment which
would otherwise seal the floor and sides of the basin to retain water.
4. Prevent muddy conditions by:
a. Providing internal drainage to avoid ponding of water and to ensure good surface flow to
designed,constructed,and properly maintained swales and basins,
C&J Gravel Products, Inc. Page 29 of 93 20 OCT 2021
Application for Permit: Oakbrush Hill Gravel M-2021- C&J-DPR-V5-001