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Polygon L appears to be due to a change in irrigation practices upslope. Polygon L does not <br />appear to be a groundwater discharge area and had no signs of hydrology during site visits. <br />Jurisdictional Findings <br />The polygons were divided into 2 groups; those likely to be jurisdictional and those believed to <br />be non jurisdictional. The project area includes 2 crossings of 1 perennial stream, Mack Wash, <br />with its associated fringe wetlands. There are 18 polygons with wetland characteristics that are <br />believed to be non jurisdictional in the project area. Waters of the US, other waters, and their <br />associated wetlands are summarized in Table 2. Surveyed UTM coordinates of wetland points <br />and transects are listed in Table 3. <br />Table 2. Jurisdictional Summary <br />Type Area Total Status Justification Distance to RPW <br /> ID acres and Dimensions <br />Waters of the U.S U 0.6 Jurisdictional RPW 0 <br />(WOUS) <br />Wetlands <br />Associated U 0.11 Jurisdictional Adjacent wetlands 0 <br />With WOUS <br /> B,C,D,E,F, 0.1 Non-Jurisdictional Irrigation waters 300ft to 1500ft <br /> G,S,T 3000ft x 1.5ft To *Mack Wash <br /> P,Q,R 0.09 Non-Jurisdictional Irrigation waters 2600ft to <br /> 3000ft x 1.5ft *Mack Wash <br /> A 0.01 Non-Jurisdictional Irrigation waters 3000ft to 7000ft to <br /> 900ft x 0.5ft *Mack Wash <br />Other Waters H 0.08 Non-Jurisdictional Irrigation waters 500ft to 1500ft to <br /> 3100ft x 1 ft **East Salt Creek <br /> K,M,O 0.02 Non-Jurisdictional Irrigation waters 3000ft to <br /> 700ft x 1 ft **East Salt Creek <br /> V 0..6 Non-Jurisdictional Irrigation Canal 6 miles to <br /> 750ft x 35ft *** West Salt Creek <br /> A,H,K,M,O 11.50 Non-Jurisdictional Marsh created by <br /> irrigation seepage <br />Wetlands D,E, 0.013 Non-Jurisdictional Resultant of <br />Associated impounded Irrigation <br />With Other water <br />Waters <br /> B,C,F,G,P, 3.01 Non-Jurisdictional Adjacent to irrigation <br /> Q,R,S,T,V ditches <br />De-Watered L 1.45 Non-Jurisdictional Lacks wetland <br />Wetlands h drolo <br />* Distance from Mack Wash at Hwy 6&50 bridge to Colorado River Approx. 3.5 river miles. <br />** Distance from East Salt Creek (just below polygon H) to Colorado River Approx. 8 miles. <br />*** Distance from Gov. Highliile Canal and West Salt Ck. to Colorado River Approx. 16 miles <br />WestWater Engineering Page 6 of 75 January 2008 <br />DBMS 427 <br />