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REP20649
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Entry Properties
Last modified
8/24/2016 11:49:11 PM
Creation date
11/27/2007 2:56:36 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1999025
IBM Index Class Name
Report
Doc Date
3/18/1999
Doc Name
ENVIRONMENTAL ASSESSMENT SOARING EAGLE RANCH GRAVEL PIT
Media Type
D
Archive
No
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<br />3.1 Proposed Action Alternative <br />Project economics that minimize potential environmental impacts are best optimized under this <br />proposed alternative. Economic factors are bolstered because sand and gravel volume developed <br />per site area is maximized. This best utilization of natural resources in conjunction with <br />minimizing potential environmental impacts occurs by mining the entire 105-acre plot and <br />mitigating wetlands at the 1.5:1 ratio. Wetland mitigation results in about 16.5 acres of <br />constructed wetlands to replace the approximately 9.8 acres excavated. <br />Cumulative environmental impacts are lessened by mining a large pit area versus several smaller <br />pits. In using one large pit, site access is limited to one area and the critical elements of <br />environment are easier to identify and address if site is limited to one physiographic area. Wise <br />utilization of gravel resources is mandated in the County Land Development Code and is needed <br />to help alleviate immediate local supply and demand issues. <br />~ Approximately 3,400,000 tons of sand and gravel resources will be removed under this <br />alternative. Mining reduces the amount of natural mineral resources and changes the general <br />appearance of the landscape in this area. Water quality impacts to downstream waters will be <br />minimized by using erosion control measures including adetention/settling pond, 3(H):1(V) pit <br />contouring, and constructed wetland vegetative planting. Site reclamation will result in <br />constructing the Texas Crossing and outlet, thus potentially creating critical backwater fish habitat <br />for threatened and endangered species. <br />The tail water drainage ditch and associated 4.8 acres of undisturbed wetlands will probably not <br />be impacted by mining activities along its north perimeter. This area will still receive flow from <br />irrigation tail water draining the southeast pasture (outside mining area) and groundwater inputs <br />i from the seeps located south of the ditch below the topographic highs. Ponded ditch water is <br />maintained because fine-grained materials have accumulated along the bottom serving to armor <br />~ channel and decrease potential Leakage. This phenomena has been observed in the groundwater <br />monitoring wells located adjacent and within wetland areas; groundwater levels in wells located in <br />wetland fringe areas can typically be depressed relative to standing water directly adjacent in the <br />emergent wet(and/wet meadow areas. <br />Economics gained by maximizing gravel yield relative to site resource potential benefits the <br />project proponent and landowner. Economic return to landowner is based on a 0.58¢ per ton <br />gravel payment totaling approximately $1,950,000 over the ]3'/z years. Once land is reclaimed it <br />will no longer support livestock grazing as an income to offset property tax deficits. <br />3-I <br />
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