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PERMFILE63501
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PERMFILE63501
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Last modified
8/24/2016 11:09:38 PM
Creation date
11/20/2007 8:02:49 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M2006018
IBM Index Class Name
PERMIT FILE
Doc Date
9/11/2006
Doc Name
DMG Response to 2nd Adequacy Letter dated 05/25/06
From
Gustavson Associates
To
DRMS
Media Type
D
Archive
No
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Wetland Areas 10, 11, 12, and 13 are associated with the supporting hydrology of the Colorado <br />River, high groundwater, and precipitation. Areas 10, 12, and 13 along the river banks <br />maintained a saturated capillary fringe nearly to the crest of the bank. Area 11, an internal <br />wetland patch is supported by high groundwater moving through alluvium. <br />Hydrologic indicators are present in adjacent pasture areas as a result of seasonally high ground <br />water which can cause soils to maintain persistent hydric characteristics. However, based on <br />vegetation present in these areas and using the FAC Neutral test, these pastures do not qualify as <br />wetlands. Less than 50 percent of the plant species are wetter than FAC if facultative species aze <br />neutral. <br />Representative photos for each of these areas are provided on the attached photo pages. <br />JURISDICTIONAL DETERMINATION <br />0.6gicre of palustrine emergent persistent (PEP) hydrophytic vegetation, hydric soils and <br />supporting hydrology are present in Area 3 (Stobaugh Ditch Remnant). Although the Stobaugh <br />Ditch is an inactive, non-navigable remnant, it has a surface water connection to the Colorado <br />River. Given that this azea meets all three wetland/jurisdictional requisites, and based on a site <br />visit with the USAGE on May 21, 2006, Area 3 is a jurisdictional wetland. <br />0.05-acres ofnon-vegetated open water (i.e., Waters) and 0.8-acre of palustrine emergent <br />persistent (PEP) hydrophytic vegetation, hydric soils and supporting hydrology are present in <br />Areas 4B (Unnamed Drainage), thereby totaling O.Q- acre of jurisdictional area. 0.21-acre of <br />palustrine emergent persistent (PEP) hydrophytic vegetation, hydric soils and supporting <br />hydrology are present in Area $We tland Swale) that connects to Area 4B. These areas have a <br />direct surface connection;aze an extension of a natural drainage;carry and collect return flows <br />from the Lower Cactus Valley Ditch, natural run-off, groundwater and precipitation to the <br />Colorado River. Therefore, Walsh supports that Areas 4B and ffire jurisdictional waters of the <br />U.S., including wetlands. The total jurisdictional area of 4B and combined is 1.13 acres. <br />O.lEtcre of palustrine emergent persistent (PEP) hydrophytic vegetation, hydric soils and <br />supporting hydrology are present in Area 6 (Isolated Stock Pond). However, because it is <br />isolated, has no surface connection to the Colorado River, and is supported solely by ground <br />water, Walsh asserts that this area is non-jurisdictional, isolated wetland. <br />0.1 &xcre of palustrine emergent persistent (PEP) hydrophytic vegetation, hydric soils and <br />supporting hydrology are present in Area 7 (Ephemeral Swale) and it is therefore a jurisdictional <br />wetland. That portion of the Swale that does not exhibit wetland characteristics, but has a defined <br />bed and bank, and a direct surface connection with the Colorado River consists of 0.02-acre (133 <br />lineal feet) of anon-vegetated Swale. This portion is considered a jurisdictional Water of the U.S. <br />0.56 acres of riverine lower perennial emergent (R2EM) hydrophytic vegetation, hydric soils and <br />supporting hydrology are present in Areas 10, 11, 12, and 13 (Colorado River Banks and Island <br />Wetlands) Therefore, these areas are jurisdictional wetlands. Open water up to the ordinary high <br />water mark is considered Jurisdictional Waters of the U.S. <br />
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