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Table 1. Wetland description summary table for the Duckworth property. Wetland Photo Areal Connected Human Map ID Number(s) Exten[ [o Idaho Created Description acres) Creek This wetland occurs along the western side of the site and has developed in a small abandoned stock watering reservoir. Standing water was present in this wetland in June 2002, but by July, all of the standing water ryas gone. The source of water for this wetland appears to be an irrigation lateral from the adjacent property located 1 1 0.13 No Yes on the west side of the wetland. Major species include chairmaker's rush (Scirpus americanus), prairie cordgrass (Spartina pectinata), common spikerush (Eleocharis nmcrostachya) and cattail species (Typha latifolia and Typha angustifolia). More than 78 percent of the species in this area are indicative of wetland conditions. A complete list of all s ecies observed in the wetland is resented in Table 2. Wetlands 2 and 3 occur in association with irrigation lateral ditches located on the south side of the property. Water is diverted into these ditches from the Smith and Emmons ditch. The diversion headgate is located in the southwest part of the site. These ditches (excavated in 2 and 3 2 and 3 0.08 No Yes uplands) carry enough water for a long enough period of time to allow 0 ~ for the development of wetland vegetation on the lower, saturated portions of the ditch channel. Reed canary grass (Phalaris arundinacea) is the major species along the ditches. A complete list of all species observed in the wetland is resented in Table 2. Wetland 4 is a small isolated wetland located on the east side of Idaho Creek. The wetland occurs in a small depression where flood irrigation water tends to accumulate. There was no standing water at this location in July, however the presence of a dried alga( crust and numerous wetland species suggests that adequate hydrology is 4 4 0.04 No Yes present to support this small wetland. There are no surface connections to Idaho Creek. Major species th this wetland include needle-leaf spike rush (Eleocharis acicularis) annual ragweed (Ambrosia artemisiifolia), and tumble grass (Schedonnardus paniculatus). A complete list of all species observed th the wetland is presented in Table 2. These wetlands consist of narrow bands of wetland vegetation associated with the channel of Idaho Creek. Flowing water in the channel saturates the soil on the stream banks and provides the hydrology necessary to support wetland species. As mapped, the wetlands include only the periodically inundated and saturated portions of the stream banks. Wetland species may spread rhizomatously into topographically higher portions of the stream bank, but these areas were not considered to be wetlands because of inappropriate hydrology. Since Idaho Creek is essentially managed as an irrigation ditch, the degree of saturation and amount of flooding varies substantially, even on a daily basis, as a result of the amount of IC-1 5, 6 and 7 2.88 Yes In part water diverted out of or through the creek. A secondary source of water for the wetlands in IC-1 is overland flow irrigation diverted from the ditch in Wetland 3. This additional water causes the overall extent of the wetland to be greater than what it would be if water th the channel of Idaho Creek was the only hydrologic source. Areas idenfified on the wetland map as IC-16 (O.S3 ac) and and IC-lc (0.29 ac) exist as a result of irrigation practices. Major species in these wetlands include reed canary grass, chairmaker's rush, inland saltgrass (Distichlis sMda) and foxtail barley (Hordeum jubatum). A complete list of all species observed in this wetland is presented in Table 2. -7-