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Case Number:
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BLD2009-00079
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Received Date:
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3/16/2009
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Description:
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Stormwater Permit with SEPA: Fred Hill Material Inc. (FHM) leases from Pope Resources who owns the 72,000 acre Hood Canal Tree Farm. FHM mineral extraction and processing areas (referred to as the Shine Hub) totals 211.5 acres and is designated a Mineral Resource Overlay District (MRL).
The current proposal by FHM is to add 10 acres of additional mineral extraction area (pit area), adjacent to the Shine Hub. These areas would be comprised of two 5-acre segments (X & Y). This would bring the total area to 231.5 acres currently regulated under a DNR Reclamation permit. This area has been logged by Pope Resources through Forest Practice Application (FPA). The additional pit area is located in a Commercial Forest designation, where mining is a permitted activity provided that no more than 10 acres is disturbed at any one time. Disturbed area is defined by RCW 78.44.031(5) and is determined by the WA State Department of Natural Resources through their Reclamation Permit.
The current mineral extraction is occurring in Segments V & W where a good deposit of gravel had been located. This area is located behind a berm south of the Shine Hub. The proposed expansion (Segments X & Y) is located south of Segments T & U and west of Segment U (see Reclamation Sequence Map). The extraction would start at the southern boundary of the existing Shine Pit and continue eastward and southward through two reclamation segments of approximately 5 acres each. The mining will utilize the cut-to-grade method. The grade of the mining slopes will "daylight" at the edge of the boundary of the new mining area, without a reclamation setback. The maximum depth of mining within this expansion will be approximately 115 feet. The proposed expansion is for mining (extraction) of aggregate only. The Shine Pit processing and vehicle repair, fueling, and maintenance will be followed including limiting extraction to remain above the seasonal high groundwater. The final floor and finished slopes of the mine will be contoured to vary in elevation and be graded to naturally sweep into adjacent terrain. All finished slopes will vary from 2:1 horizontal to 3:1 horizontal, with an average slope of 2.5:1. Contouring of the slopes will be graded to have a "natural feel" sinuous slopes, free of any "man-made" rectilinear lines. The final floor of the mine adjacent to the higher portions of the slopes will be graded toward the base of the slope, allowing stormwater to infiltrate to groundwater. The floor will be graded with varying heights and cut with interceptor swales (drainage channels). The varying floor heights and swales will curve and flow "naturally" across the final floor topography, not be cut as a straight line "man-made" from one boundary to another. Swales will be cut along the boundaries of the proposed new mining area. The grade of these swales will also be sinuous in nature. The proposed new mining area may have various sand pockets that will not be removed; instead, they will be used to help create a "natural feeling" sinuous final topography.
After the area is mined, stored topsoil would be spread over the final mine floor a minimum of 6 inches deep and over finished slopes at a depth of 4-6 inches. Forest debris (i.e. stumps and branches) will be placed over the final floor and finished slopes, providing erosion control, moisture retention, shading and nutrients for future pioneering plants. Re-vegetation will occur during the non-growing season. A native seed mix will be applied in the fall at a rate of 25lbx/acre, consisting of slender wheatgrass (50 percent) sheep fescue (40 percent) and sand dropsied (10 percent). Up to 30 percent white clover may be added to the seed mix. In late winter, healthy, quality stock of Douglas fir seedlings will be planted in the furrows ripped in the floor of the pit. Douglas fir seedlings will be planted on a 10-foot by 10-foot grid with a planting density of approximately 435 per acre
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Issued Date:
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5/5/2009
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Case Status:
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F
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Expiration Date:
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5/5/2010
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Final Date:
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5/1/2017
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Permit Applicant:
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FRED HILL MATERIALS
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Parcel No:
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721062001
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Case Notes:
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Building Type:
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SWT
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Water Supply:
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Existing:
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Main Fl:
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Type of Improvement:
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C&G
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Sewage Disposal:
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Proposed:
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Add Fl:
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Type of Construction:
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Total:
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Heated Basement:
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Units:
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Unheated Basement:
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Height:
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Other:
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Stories:
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Garage/Carport:
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Heat Type:
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Decks:
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Estimated Cost:
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Existing:
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ShBnkHt:
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LndBnkHt:
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Make:
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Proposed:
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ShSetBk:
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LndSetBk:
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Yr:
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Total:
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Size:
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