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o e e e increased by 43%- 220"10 from 2002 to 2004. Other channel improvements that were identified to be important were 80 stabilized grade control structures and 250 instream rock clusters that contained channel constriction capability that increased velocities downstream of the structures and maintained created pool depths. Fig. 2 Rock Creek Channel Stability and Trout Habitat Rating Comparisons 2002vs2004 TobIo RooIr.lUaoh. Roolt CoomIy. co. 100---".--.----------...------- 100 . "G.. ua: o 0 /. 9>> / , i! E 8O----~-----.-'---'--:::.~-::---~~-----__:;.-;;---1I) l ~ . .------...... '........------.. ~ I 80. ..=..... --.---- ------~-- 80 j ! ..... Ul i 40- .-...:......... -~ ---40 ~ ~ 2O------~-u--~-~~~-- ...-~---20 ~ o o u_ Middle 1 MIddle 2 Lower Average - o ~__'-""'Dl2 ___ TIlIoI.-._:Illll2 -.- a-oI_~DM ___ lI'lII~~XIOiI c-.1IIWIJIt(C2) .....-..a...a...,...... __J....8IIlita(Dl) ~.U-SItIiIal... ChaDDel StabiHty aDd Trout Habitat RatiDgs: Results of Channel Stability and Trout Habitat Ratings for 2004 can be viewed in Appendix II. Comparison of resuhs between 2002 and 2004 results can be viewed in Figure 1. Channel stability improves as ratings scores decrease. Channel Stability ratings decreased at all stations from 2002 to 2004 as a direct result of the work completed. Primary areas of improvement included reduced bank slopes, reduced bank and bed cutting, general improvement in bed material stability, and increased vegetative vigor. All scores realized in 2002 were between 90-105 with score dramatically reducing in 2004 to between 63 -95. Scores improved at each station with decreases realized between ten and twenty points based on a scale of 120 possible, Trout habitat ratings improve as the rating score increases. Maximum score possible is 60 . Ratings increased at all stations from 2002 to 2004. Piiwwy areas of improvement included increased bank stability, increased spawning areas, as well as increased frequency, size and depth ofpooIs. Scores improved approximately 50% at each station evaluated. Scores in 2002 ranged from 25-35 increasing to 40-58 in 2004. The substantial impro"e...,.,~ identified in this evaluation are primarily due to the work completed in 2003 and the excellent streamside revegetation that was enhan..M by this effurt and the stream flows rea1i7.e<t Many trout are observed in the stream and C'lJlg/1t by anglers. Brown trout redds were observed in the channel in 2004. Aquatic Macroinvertebrates: Biotic Condition Index (BCI) was used to evaluate 3 stations for macroinvertebrates was accomplished in 2002 and 2 stations in 2004. Samples were taken during both efforts above and below Egeria Creek. ResuIts can be viewed in Table 2.