AVISTA CORPORATION

COEUR D’ALENE LAKE AQUATIC WEED MANAGEMENT PLAN FOR NON-TRIBAL WATERS 2013 SUMMARY REPORT

SPOKANE RIVER LICENSE ARTICLE 410

SPOKANE RIVER HYDROELECTRIC PROJECT

FERC PROJECT NO. 2545

Prepared By: Avista Corporation

February 25, 2014

Table of Contents

1.0 INTRODUCTION ...... 1 1.1 Background ...... 1 1.2 Coeur d’Alene Lake Aquatic Weed Management Plan ...... 1 2.0 COORDINATION ...... 2 3.0 SURVEYS ...... 2 4.0 MANAGEMENT/TREATMENTS ...... 3 5.0 MILFOIL MANAGEMENT IN COEUR D’ALENE LAKE TRIBAL WATERS ...... 3 6.0 2013 EDUCATION/OUTREACH ...... 4 7.0 FUNDING...... 4 8.0 PLANNED ACTIVITES FOR 2014 ...... 4 9.0 REFERENCES ...... 5

FIGURES

Figure 1. Post Falls Project Location Map Figure 2. 2013 Estimated Milfoil Distribution Coeur d’Alene Lake

APPENDICES

Appendix A. Chain Lakes and Coeur d’Alene Lake Milfoil Surveys Appendix B. Consultation Record

2013 Coeur d’Alene Lake Non-Tribal Waters i February 25, 2014 Aquatic Weed Summary Report

1.0 INTRODUCTION The purpose of the Coeur d’Alene Lake Aquatic Weed Management Plan for Non-Tribal Waters (Plan) is to control the spread and reduce the distribution of aquatic noxious weeds within non- tribal Project waters of Coeur d’Alene Lake. To achieve this purpose, Avista cooperates with and supports a multitude of agencies that have existing aquatic weed management programs on Coeur d’Alene Lake. This report summarizes the measures completed by Avista as well as those by the Department of Environmental Quality (IDEQ); Kootenai County Noxious Weed Control Board (KCNWCB); Idaho State Department of Agriculture (ISDA) and the Coeur d’Alene Tribe (cooperating parties).

1.1 Background On June 18, 2009, the Federal Energy Regulatory Commission (FERC) issued a new License for Avista’s Spokane River Hydroelectric Project, FERC Project No. 2545 for a 50-year license term. The License became effective on June 1, 2009 and includes operation of five Hydroelectric Developments (HEDs) on the Spokane River; four in the state of (Upper Falls, Monroe Street, Nine Mile, and Long Lake HEDs) and one in Idaho (Post Falls HED). Article 410 of the License required the development of the Plan, which FERC approved on January 19, 2011 (FERC Order 2545-129). The Plan is specific to Avista’s Post Falls HED, which is located on the Spokane River approximately nine miles downstream from the outlet of Coeur d’Alene Lake.

1.2 Coeur d’Alene Lake Aquatic Weed Management Plan Article 410 of the License required Avista to develop the Plan in consultation with the Idaho Department of Fish and Game and the Fish and Wildlife Service. This Plan provides for the management of aquatic noxious weeds within the Post Falls HED Project boundary, excluding the Coeur d’Alene Indian Reservation (Reservation) (Figure 1), and includes the following elements:

• Provisions to establish or expand aquatic noxious weed educational programs; • A framework for annual monitoring to determine the distribution of aquatic noxious weeds; and • Management strategies for the control of aquatic noxious weeds.

The Plan also identifies potential cooperating parties currently involved in the management of aquatic noxious weeds within the Project boundary, and a schedule within which Avista will implement the various measures. The purpose of the coordination is to cooperate with and support entities that implement aquatic weed management programs within the Project boundary.

The littoral habitats have been surveyed for aquatic noxious weeds since 2006, with most habitats susceptible to weed infestation having been surveyed more than once. Milfoil and a hybrid of milfoil and northern watermilfoil (M. sibiricum) are the only aquatic noxious weeds that have been identified in the area addressed by this Plan. Historically infestations of these species have been found in Harrison Slough, along the shoreline near Harrison, within Heyburn

2013 Coeur d’Alene Lake Non-Tribal Waters 1 February 25, 2014 Aquatic Weed Summary Report

State Park, and within the chain lakes associated with the Coeur d’Alene River (Cave, Medicine, and Black lakes; CDAT 2006, 2008, 2009, 2010; IECWMA 2007). In addition, Avista and the Coeur d’Alene Tribe (2008-2013) have identified infestations of milfoil within the St. Joe and St. Maries rivers upstream of the Reservation boundary.

2.0 COORDINATION Avista cooperates and supports entities identified in Section 1.0 that have existing aquatic weed management programs on Coeur d’Alene Lake. Avista met with the cooperating parties on March 4, 2013 to coordinate activities and develop the following 2013 task list:

• Coordinate aquatic weed monitoring, education and outreach, and treatment efforts with the cooperating parties; • Partner with IDEQ to survey and monitor six bays for milfoil; • Complete three days of diver pull of milfoil in Mica Bay; • Complete milfoil surveys on Anderson Lake, Black Lake, Blue Lake, Cave Lake, Killarney Lake, Medicine Lake and Thompson Lake (collectively referred to as the “Chain Lakes”); • Complete milfoil management in Coeur d’Alene Lake Tribal waters; and • Distribute educational/outreach materials at the North Idaho Fair.

3.0 SURVEYS In 2011, Avista mapped suitable milfoil habitat using high, moderate, and low survey priority categories, based on susceptibility to infestation for milfoil within Coeur d’Alene Lake. In accordance with the Plan, surveys will occur annually per the following schedule: high priority suitable habitats will be surveyed a minimum of once per three-year period; moderate priority suitable habitats will be surveyed a minimum of once per four-year period; and low priority suitable habitats will be surveyed a minimum of once per five-year period.

Additionally, in 2011 Avista completed a milfoil survey for the Spokane River and partnered with IDEQ to survey Mica, Sun-Up, Windy, Sixteen to One, Cave, Aberdeen Lodge, Powderhorn, and Bell Bays as well as Harrison Slough for milfoil. Milfoil was located in Mica, Windy and Sixteen to One Bays during the 2011 surveys. In 2012, Avista partnered with IDEQ to survey Mica, Echo, Loffs, Carlin, Half Round, and Turner bays for milfoil. No milfoil was identified during the 2012 surveys.

In 2013, Avista contracted with Lakeland Restoration Services to complete milfoil surveys in Anderson Lake, Black Lake, Blue Lake, Cave Lake, Killarney Lake, Medicine Lake and Thompson Lake. During the survey the entire littoral zone, defined as the shallow area near the shore of a body of water that extends from the shoreline lake-ward to the limit of occupancy of rooted plants, was surveyed. The survey was conducted from a boat using rake throws and visual observations at pre-defined survey grid points. When milfoil was located the point location was recorded with a GPS. Milfoil was identified in all of the Chain Lakes with the exception of Swan Lake. The technical report is located in Appendix A.

2013 Coeur d’Alene Lake Non-Tribal Waters 2 February 25, 2014 Aquatic Weed Summary Report

In addition to surveying the Chain Lakes, Avista partnered with IDEQ to survey Cave, Everwell, Swede, Gotham, Mica and Kid Island bays for milfoil using the point intercept (grid) method and transect sampling by SCUBA. The surveys were conducted over a period of two weeks in July and one week in September. The only milfoil identified during the course of the 2013 IDEQ milfoil surveys was located in Mica Bay.

In summary, between 2011 and 2013, milfoil populations have been identified in Mica, Windy and Sixteen to One bays, as well as the Chain Lakes discussed above. A map of the 2011-2013 survey results on non-tribal waters, was combined with known locations of milfoil on Tribal waters (managed under a separate plan) to document the known populations of milfoil in Coeur d’Alene Lake as of the 2013 survey season (Figure 2). Milfoil in Mica Bay was hand pulled this year (as discussed in Section 4), milfoil in the south end of Coeur d’Alene Lake and Round Lakes on Tribal waters were treated with herbicide, and areas with milfoil within the St. Joe and St. Maries Rivers were hand pulled or covered with bottom barriers (as discussed in Section 5). Additionally, previously known populations of milfoil were not detected in the Harrison Slough area, which was treated with herbicide in 2011. With this, anecdotal evidence suggests that many of the known populations of milfoil have been reduced or eliminated.

4.0 MANAGEMENT/TREATMENTS Avista retained ACE Diving to remove approximately one acre of milfoil from Mica Bay in September 2013. The milfoil, located on the south end of the bay, immediately west of Mica Bay Park, ranged from sparse to dense and was hand removed utilizing SCUBA equipment and a diver suction dredge. The milfoil was hand pulled to insure all the plant was removed then placed in the suction dredge to be disposed of in an upland area. Over a four-day period (one day was funded by ISDA), approximately 750 lbs of milfoil was removed. This area will be evaluated in 2014 to determine the effectiveness of the hand pulling.

5.0 MILFOIL MANAGEMENT IN COEUR D’ALENE LAKE TRIBAL WATERS In addition to working with the various entities to monitor and control aquatic weeds on Coeur d’Alene Lake outside the Reservation, Avista also funded significant aquatic weed control efforts on Reservation waters in 2013, which is the area within Coeur d’Alene Lake that is most vulnerable to milfoil infestations. The areas that were treated and the methods used to control weeds are listed below. The final efficacy rates will be included in the 2013 Annual Implementation Report prepared by Avista and the Tribe for the United States Department of Interior and FERC.

Diver Suction ACE Diving completed diver suction removal along approximately one and a half miles of the inner banks of the St. Joe and St. Maries Rivers from August 12 through August 18, 2013.

2013 Coeur d’Alene Lake Non-Tribal Waters 3 February 25, 2014 Aquatic Weed Summary Report

Bottom Barriers ACE Diving also placed one hundred and sixty bottom barriers in the lower St. Joe River, near the City of St. Maries. The 10 x 10 foot barrier panels were placed over a dense patch of milfoil and were left in place for a six to eight week period to control milfoil.

Herbicide Treatments AquaTechnex completed herbicide treatments on 99 acres in Round Lake and the south end of Coeur d’Alene Lake using Navigate®, which was applied using a surface distribution method. Barrier curtains were placed around most of the treatment areas to reduce or eliminate the wind- induced water exchange rate.

6.0 2013 EDUCATION/OUTREACH Avista distributed educational brochure describing milfoil and how to identify it, the known distribution of milfoil in Coeur d’Alene Lake, and measures to prevent its spread. In addition, Avista provided educational items at the North Idaho Fair for a period of five days. The primary message of the “give-away” items was focused on preventing the spread of invasive aquatic weeds by educating boaters on the importance of cleaning, draining, and drying their boats.

7.0 FUNDING In 2013, Avista made funding available for the following aquatic weed control tasks on non- tribal waters:

Table 1. 2013 Aquatic Weed Funding

Avista provided funding to IDEQ for milfoil surveys in accordance with the $5,737 Plan. Avista contracted with Lakeland Restoration Services to complete milfoil surveys on Anderson Lake, Black Lake, Blue Lake, Cave Lake, Killarney $15,000 Lake, Medicine Lake, and Thompson Lake. Avista contracted with ACE Diving to hand pull milfoil in Mica Bay. $4,200

TOTAL $24,937

8.0 PLANNED ACTIVITES FOR 2014 As outlined in the Plan, Avista annually identifies areas for upcoming surveys, reviews available funding, and schedules an annual meeting with the cooperating parties to develop and coordinate activities. A final program task list is completed prior to May 1, on an annual basis. Avista is currently in the process of preparing for and scheduling the annual coordination meeting for March 2014.

2013 Coeur d’Alene Lake Non-Tribal Waters 4 February 25, 2014 Aquatic Weed Summary Report

9.0 REFERENCES

Coeur d’Alene Tribe Lake Management Department. 2006. 2006 Coeur d’Alene Tribe Eurasian Watermilfoil Control Program Project Completion Report. Coeur d’Alene Tribe Lake Management Department, Plummer, ID.

Coeur d’Alene Tribe Lake Management Department. 2007 Coeur d’Alene Tribe Eurasian Watermilfoil Control Program Project Completion Report. Coeur d’Alene Tribe Lake Management Department, Plummer, ID.

Coeur d’Alene Tribe Lake Management Department. 2008 Coeur d’Alene Tribe Eurasian Watermilfoil Control Program Project Completion Report. Coeur d’Alene Tribe Lake Management Department, Plummer, ID.

Coeur d’Alene Tribe Lake Management Department. 2009 Coeur d’Alene Tribe Eurasian Watermilfoil Control Program Project Completion Report. Coeur d’Alene Tribe Lake Management Department, Plummer, ID.

Coeur d’Alene Tribe Lake Management Department. 2010 Coeur d’Alene Tribe Eurasian Watermilfoil Control Program Project Completion Report. Coeur d’Alene Tribe Lake Management Department, Plummer, ID.

2013 Coeur d’Alene Lake Non-Tribal Waters 5 February 25, 2014 Aquatic Weed Summary Report

FIGURES

Figure 1 Post Falls Project Location Map

Figure 2 2013 Estimated Milfoil

Distribution Coeur d’Alene Lake

APPENDIX A

CHAIN LAKES AND COEUR D’ALENE LAKE MILFOIL SURVEYS

LLLLLLaaaaaakkkkkkeeeeeelllllllllaaaaaannnnnndddddd RRRRRReeeeeesssssstttttttttoooooorrrrrrrrraaaaaatttttttttiiiiiiiiioooooonnnnnn SSSSSSeeeeeerrrrrrrrrvvvvvviiiiiiiiicccccceeeeeessssss,,,,,,,,, LLLLLLLLLLLLCCCCCC 78 E River Spur Rd, Priest River, ID 83856 Phone/Fax: (208) 448-2222 www.lakelandrs.com

CHAIN LAKES AND COEUR D’ ALENE LAKE MILFOIL SURVEYS AVISTA CONTRACT R-38855

FINAL REPORT

Beginning August 14 th , 2013 and ending August 18th, 2013, Lakeland Restoration Services, LLC (LRS) performed a Eurasian Watermilfoil (EWM) survey of the Chain Lakes. The purpose of this report is to define the methodology used and results for each lake surveyed.

Survey Methodology

LRS provided labor, materials and equipment necessary to complete EWM surveys on Anderson Lake, Black Lake, Blue Lake, Cave Lake, Killarney Lake, Medicine Lake and Thompson Lake, collectively the “Chain Lakes”.

In order to identify EWM plant populations, a survey of the lake’s entire littoral area was conducted. The littoral zone is defined as the shallow area near the shore of a body of water that extends from the shoreline lake-ward to the limit of occupancy of rooted plants. This survey was conducted from a boat using rake throws and visual observation. The entire littoral zone was surveyed by navigating in a regular pattern so that the entire bottom was observed. Regular rake throws were conducted to check for EWM in areas with limited visibility. As water clarity decreased, the frequency of rake sampling increased. When EWM was found, the GPS location was recorded. Eurasian Watermilfoil – rake throw Chain Lakes Survey August 2013

Also noted with GPS coordinates was the location of invasive emergent shoreline plants (purple loosestrife, phragmites and yellow flag iris) as they were detected.

Prior to the start of surveys, maps with point locations were created. After the completions of surveys, maps were created reflecting points with EWM and emergent plant infestations. Maps were also created after surveys reflecting only points surveyed. Survey was monitored and maps were created using GPS and Arcview GIS technology. Maps were submitted to David Armes.

Lakeland Restoration Services, LLC Chain Lakes and Coeur d’Alene Lake Survey 2013 Page 1of2

Phragmites Lake Killarney Survey Chain Lakes August 2013

Survey Results

The table below reflects each lake surveyed and the results of survey (maps included following table):

Lake Date of # of Points EWM Phragmites Purple Yellow Flag Survey Surveyed Loosestrife Iris Anderson 8/17/2013 247 18 pts. SE Lake and NE infestations Black Lake 8/16/2013 199 28 pts. 2 pts. Heavy SE and southern western infestation infestations northern and NE infestations Blue Lake 8/17/2013 171 41 pts. 1 pt. 1 pt. lake wide southern SW infestations infestation infestation Cave Lake 8/15/2013 372 Heavy 3 pts. lake wide NW infestations infestations Killarney 8/16/2013 568 19 pts 12 pts Lake northern SW infestations infestations Medicine 8/15/2013 110 28 pts. 4 pts. 13 pts. Lake lake wide western and lake wide infestations northern infestations infestation Swan Lake 8/16/2013 355 4 pts. 1 pt. southern southern infestation infestation

Thompson 8/18/2013 315 55 pts Lake northern southern eastern infestations with heavy northern infestation

Lakeland Restoration Services, LLC Chain Lakes and Coeur d’Alene Lake Survey 2013 Page 2of2

Chain Lakes Survey 2013 Coeur D Alene Overview Map Lake

LEGEND (! (! E. Milfoil Purple Loosestrife Killarney Lake (! Phragmites (! Yellow Flag Iris 0 0.5 1 2 Miles ¯ !( Lane

3 - H S Blue Lake

Thompson Lake Swan Lake !( Medimont Springston !(

Medicine Lake

Anderson Lake

-3 H S !( Harrison Black Lake Cave Lake

SH-97 Lacon !(

No warranty is made by Lakeland Restoration Services Coeur D Alene as to the accuracy, reliability, or completeness of these data for Lake individual or aggregate use with other data. Original data was compiled from various sources. Date: 10/7/2013

!( Chain Lakes Survey Project: Anderson Lake

Thompson Lake

A245 A246 E E A240 A241 A242 A243 A244 E E E E E A234 A235 A236 A237 A238 A239 E E E E E E A226 A227 A228 A229 A230 A231 A232 A233 E E E E E E E E A217 A218 A219 A220 A221 A222 A223 A224 A225 E E E E E E E E E A207 A208 A209 A210 A211 A212 A213 A214 A215 A216 E E E E E E E E E E A195 A196 A197 A198 A199 A200 A201 A202 A203 A204 A205 A206 E E E E E E E E E E E E A182 A183 A184 A185 A186 A187 A188 A189 A190 A191 A192 A193 A194 E E E E E E E E E E E E E A167 A168 A169 A170 A171 A172 A173 A174 A175 A176 A177 A178 A179 A180 A181 E E E E E E E E E E ! ! E ! E A152 A153 A154 A155 A156 A157 A158 A159 A160 A161 A162 A163 A164 A165 A166 E E E E E E E E E E E ! ! ! E A135 A136 A137 A138 A139 A140 A141 A142 A143 A144 A145 A146 A147 A148 A149A150A151 E E E E E E E E E E E E E E ! ! ! A118 A119 A120 A121 A122 A123 A124 A125 A126 A127 A128 A129 A130 A131 A132 A133 A134 E E E E E E E E E E E E E E ! A!117 E A11!6 A101 A102 A103 A104 A105 A106 A107 A108 A109 A110 A111 A112 A113 A114A11!5 E E E E E E E E E E E E E E E A83 A84 A85 A86 A87 A88 A89 A90 A91 A92 A93 A94 A95 A96 A97 A98 A99 A100 E E E E E E E E E E E E E E E E E E A66 A67 A68 A69 A70 A71 A72 A73 A74 A75 A76 A77 A78 A79 A80 A81 A82 E E E E E E E E E E E E E E E E E A51 A52 A53 A54 A55 A56 A57 A58 A59 A60 A61 A62 A63 A64 A65 E E E E E E E E E E E E E E E A38 A39 A40 A41 A42 A43 A44 A45 A46 A47 A48 A49 A50 E E E E E E E E E E E E E A27 A28 A29 A30 A31 A32 A33 A34 A35 A36 A37 E E E E E E E E E E E A18 A19 A20 A21 A22 A23 A24 A25 A26 Anderson Lake E E E E E E E E E A12 A13 A14 A15 A16 A17 E E E E E E A7 A8 A9 A10 A11 E E E ! E A3A4 A5 A6 ! ! ! E A1 A0 ! A2 E E

! 0 0.125 0.25 0.5 Miles No warranty is made by E. Milfoil Lakeland Restoration Services as to the accuracy, reliability, or A23 E completeness of these data for Potential Survey Point and ID individual or aggregate use with ¯ other data. Original data was Date: 8/22/2013 compiled from various sources. Chain Lakes Survey Project: Black Lake

BLA198 E

BLA195 BLA196 BLA197 E E E

BLA191 BLA192 BLA193 BLA194 E E E E

BLA185 BLA186 BLA187 BLA188 BLA189 BLA190 E E E E E E

BLA178 BLA179 BLA180 BLA181 BLA182 BLA183 BLA184 E E ! ! E E E

BLA172 BLA173BLA174 BLA175 BLA176 BLA177 E ! E E E E

Black Lake BLA166 BLA167 BLA168 BLA169 BLA170 BLA171 E E E E E E

BLA160 BLA161 BLA162 BLA163 BLA164 BLA165 E E E E E E

BLA153 BLA154 BLA155 BLA156 BLA157 BLA158 BLA159 E E E E E E E

BLA145 BLA146 BLA147 BLA148 BLA149 BLA150 BLA151 BLA152 E E E E E E E E

BLA134 BLA135 BLA136 BLA137 BLA138 BLA139 BLA140 BLA141 BLA142 BLA143 BLA144 E E E E E E E E E E E

BLA122 BLA123 BLA124 BLA125 BLA126 BLA127 BLA128 BLA129 BLA130 BLA131 BLA132 BLA133 E ! E E E E E E E E E E

BLA110 BLA111 BLA112 BLA113 BLA114 BLA115 BLA116 BLA117 BLA118 BLA119 BLA120 BLA121 ! ! ! E E E E E E E E E

BLA98 BLA99 BLA100 BLA101 BLA102 BLA103 BLA104 BLA105 BLA106 BLA107 BLA108 BLA109 E E E E E E E E E E E E

BLA91 BLA92 BLA93 BLA94 BLA95 BLA96 BLA97 E E E E E E E

BLA85 BLA86 BLA87 BLA88 BLA89 BLA90 E E E E E !

BLA78 BLA79 BLA80 BLA81 BLA82 BLA83 BLA84 E E E E E E E

BLA72 BLA73 BLA74 BLA75 BLA76 BLA77 BLA71 ! ! E E E E E

BLA63 BLA64 BLA65 BLA66 BLA67 BLA68 BLA69 BLA70 E ! E E E E E !

BLA54BLA55 BLA56 BLA57 BLA58 BLA59 BLA60 BLA61 BLA62 ! ! E E E E E E E

BLA44 BLA45 BLA46 BLA47 BLA48 BLA49 BLA50 BLA51 BLA52 BLA53 E ! E E ! ! E E E E BLA38 BLA34 BLA35 BLA36 BL!A37 BLA39 BLA40 BLA41 BLA42 BLA43 E E E ! E E E E E BLA27 BLA24 BLA25 BLA!26 BLA28 BLA29 BLA30 BLA31 BLA32 BLA33 E E E E E E E ! E

BLA14BLA15 BLA16 BLA17 BLA18 BLA19 BLA20 BLA21 BLA22 BLA23 ! E E E E E ! E ! E

BLA5 BLA6 BLA7 BLA8 BLA9 BLA10 BLA11 BLA12 BLA13 E E E E E ! E ! E BLA1 ! BLA2 BLA3 BLA4 ! E E

BLA0 E

! E. Milfoil 0 0.125 0.25 0.5 Miles No warranty is made by Lakeland Restoration Services as to the accuracy, reliability, or E Purple Loostrife completeness of these data for individual or aggregate use with A23 ¯ E Potential Survey Site and ID other data. Original data was Date: 8/22/2013 compiled from various sources. Chain Lakes Survey Project: Blue Lake

BLU170 BLU171 E E

BLU165BLU166 BLU167 BLU168 BLU169 ! ! ! E E

BLU160 BLU161 BLU162 BLU163 BLU164 BLU159 ! ! ! ! ! E

BLU154BLU155BLU156BLU157 BLU158 ! E E ! E

BLU150 BLU151 BLU152 BLU153 E E E E

BLU145 BLU146 BLU147 BLU148 BLU149 ! E E E E

BLU139 BLU140 BLU141 BLU142 BLU143 BLU144 E E E E E E Blue Lake BLU132BLU133 BLU134 BLU135 BLU136 BLU137 BLU138 ! E E E E E E

BLU126 BLU127 BLU128 BLU129 BLU130 BLU131 E E E E E E

BLU118BLU119 BLU120 BLU121 BLU122 BLU123 BLU124 BLU125 ! ! E E E E E E

BLU110BLU111 BLU112 BLU113 BLU114 BLU115 BLU116 BLU117 ! E E E ! ! ! E

BLU102 BLU103 BLU104 BLU105 BLU106 BLU107 BLU108 BLU109 E E E E E ! ! E

BLU94 BLU95 BLU96 BLU97 BLU98 BLU99 BLU100 BLU101 E E E E ! ! ! E

BLU86 BLU87 BLU88 BLU89 BLU90 BLU91 BLU92 BLU93 E E E E E E ! E

BLU77 BLU78 BLU79 BLU80 BLU81 BLU82 BLU83 BLU84 BLU85 E ! E E E E ! E E

BLU69 BLU70 BLU71 BLU72 BLU73 BLU74 BLU75 BLU76 E E E E E E ! E

BLU59 BLU60 BLU61 BLU62 BLU63 BLU64 BLU65 BLU66 BLU67 BLU68 E E E E E E E E E E

BLU49BLU50 BLU51 BLU52 BLU53 BLU54 BLU55 BLU56 BLU57 BLU58 ! ! ! E E E ! E E E

BLU38 BLU39 BLU40 BLU41 BLU42 BLU43 BLU44BLU45BLU46BLU47 BLU48 E ! ! ! ! ! ! ! ! !!

BLU26 BLU27 BLU28 BLU29 BLU30 BLU31 BLU32 BLU33 BLU34 BLU35 BLU36 BLU37 E E E E E E E E E E E E

BLU14 BLU15 BLU16 BLU17 BLU18 BLU19 BLU20 BLU21 BLU22 BLU23 BLU24 BLU25 E E E E E E E E E E E E

BLU3 BLU4 BLU5 BLU6 BLU7 BLU8 BLU9 BLU10 BLU11 BLU12 BLU13 E E E E E EE E E E E E

BLU0 BLU1 BLU2 E E E

! E. Milfoil 0 0.125 0.25 0.5 Miles No warranty is made by E Phragmites Lakeland Restoration Services as to the accuracy, reliability, or E Purple Loostrife completeness of these data for BLU2 ¯ individual or aggregate use with E Potential Survey Site and ID other data. Original data was Date: 8/22/2013 compiled from various sources. Chain Lakes Survey Project: Cave Lake

EC369 EC370 EC371

EC364 EC365 EC366 EC367 EC368

EC358 EC359 EC360 EC361 EC362 EC363

EC351 EC352 EC353 EC354 EC355 EC356 EC357

C339 C340 C341 C342 C343 C347 C348 C349 C350 E E E E E C346! ! ! ! !C344!C345 ! C329 C325 C328 C330 C331 C332 C333 C334 C335 C336 C337 C338 E C327 ! !E ! ! ! E ! ! ! ! ! !C326 ! EC309 EC310 !C311 !C312 !C313 !C314 !C315 !C316 !C317 !C318 !C319 !C320 !C321 !C322 !C323 !C324

EC291 EC292 EC293 !C294 !C295 !C296 !C297 EC298 !C299 !C300 !C301 !C302 !C303 !C304 !C305 !C306 !C307 !C308

C274 C275 EC271 EC272 EC273 !E !E !C276 !C277 !C278 !C279 !C280 !C281 !C282 !C283 !C284 !C285 !C286 !C287 !C288 !C289 !C290 Medicin Lake EC249 EC250 !C251 EC252 !C253 !C254 EC255 EC256 EC257 EC258 EC259 EC260 EC261 EC262 EC263 EC264 EC265 !C266 !C267 !C268 !C269 EC270

EC227 EC228 EC229 !C230 !C231 !C232 EC233 EC234 EC235 EC236 EC237 EC238 EC239 EC240 EC241 EC242 EC243 !C244 !C245 !C246 !C247!C248

EC203 EC204 !C205 !C206 !C207 EC208 EC209 EC210 EC211 EC212 EC213 EC214 EC215 EC216 EC217 EC218 EC219 EC220 EC221 !C222 !C223 !C224 EC225 EC226

EC179 EC180 !C181 !C182 !C183 !C184 EC185 EC186 EC187 EC188 EC189 EC190 EC191 EC192 EC193 EC194 EC195 EC196 !C197 !C198 !C199 !C200 EC201 EC202

EC157 EC158 EC159 EC160 !C161 !C162 !C163 EC164 EC165 EC166 EC167 EC168 EC169 EC170 EC171 EC172 EC173 EC174 EC175 !C176 !C177 EC178

C156 EC135 EC136 EC137 EC138 EC139 !C140 !C141 !C142 !C143 EC144 EC145 EC146 EC147 EC148 EC149 EC150 EC151 EC152 EC153 !C154 !C155!

EC113 EC114 EC115 EC116 EC117 EC118 !C119 !C120 !C121 EC122 !C123 EC124 EC125 EC126 EC127 EC128 EC129 EC130 EC131 !C132 !C133 !C134

EC91 EC92 EC93 EC94 EC95 EC96 EC97 EC98 EC99 EC100 !C101 EC102 EC103 EC104 EC105 EC106 EC107 EC108 EC109 EC110 EC111 EC112

EC70 EC71 EC72 EC73 EC74 EC75 EC76 !C77 !C78 EC79 EC80 !C81 EC82 EC83 EC84 EC85 EC86 EC87 EC88 EC8!9C90 !C60 EC50 EC51 EC52 EC53 EC54 !C55 !C56 EC57 EC58 EC59 !C61 !C62 EC63 EC64 EC65 EC66 EC67 EC68 EC69

EC34 EC35 EC36 EC37 EC38 EC39 EC40 EC41 EC42 EC43 EC44 EC45 !C46 EC47 EC48 EC49

EC20 EC21 EC22 EC23 EC24 EC25 !C26 !C27 EC28 EC29 EC30 EC31 EC32 !C33 C18 !C12 ! EC9 EC10 EC11 !C13 !C14 !C15 !C16 !C17 EC19

C8 EC3 !C4 !C5 !C6 !C7 ! Cave Lake EC0 !C1 !C2

! 0 0.125 0.25 0.5 Miles No warranty is made by E. Milfoil Lakeland Restoration Services as to the accuracy, reliability, or E Purple Loostrife completeness of these data for A23 ¯ individual or aggregate use with E other data. Original data was Potential Survey Site and ID Date: 8/22/2013 compiled from various sources. Chain Lakes Survey Project: Killarney Lake

033 0E32 0E31 E 027 028 030 E EE012 E 029 E

015 016018 02EE102E4025026 EEEE0E23 013 0E200E2E2 E

Killarney Lake

002 E 001 E

003 E 011 EE004 E014 E E010 005 009 007 EE008 0EE06

0 0.125 0.25 0.5 Miles No warranty is made by E E. Milfoil Lakeland Restoration Services as to the accuracy, reliability, or E Phragmites completeness of these data for ¯ individual or aggregate use with other data. Original data was Date: 8/22/2013 compiled from various sources. Chain Lakes Survey Project: Medicine Lake

Medicine Lake

!EM107 EM108 EM109

!M103 EM104 EM105 EM106 !M102

M101 EM96 EM97 EM98 !M99 !M100!

!M95 EM88 EM89 EM90 EM91 EM92 !M93 !M94

EM81 EM82 EM83 EM84 EM85 !M86 !M87

M80 EM74 EM75 EM76 EM77 EM78 EM79 !E

M66 M68 M69 M70 M71 M72 E M67 E E E E !E E M73 !E M57 !E M58 EM59 EM60 EM61 EM62 EM63 EM64 !M65 Cave Lake E M49 !E EM50 EM51 EM52 EM53 EM54 EM55 !M56

M42 M48 EM41 !E EM43 EM44 EM45 EM46 EM47 E

M35 !E EM36 EM37 EM38 EM39 EM40

M28 M34 E EM29 EM30 EM31 EM32 EM33 E

M21 !E EM22 EM23 !M24 EM25 EM26 EM27

M15 !E !M16 !M17 EM18 EM19 EM20

M9 M10 E E !M11 !M12 EM13 EM14

!M4 !M5 EM6 EM7 EM8

EM0 EM1 EM2 EM3

! E. Milfoil 0 0.125 0.25 0.5 Miles No warranty is made by E Yellow Flag Iris Lakeland Restoration Services as to the accuracy, reliability, or E Purple Loostrife ¯ completeness of these data for A23 individual or aggregate use with other data. Original data was E Potential Survey Site and ID Date: 8/22/2013 compiled from various sources. S354 E

S343 S344 S345 S346 S347 S348 S349 S350 S351 S352 S353 E E E Swan Lake E E E E E E E E S328 S329 S330 S331 S332 S333 S334 S335 S336 S337 S338 S339 S340 S341 S342 E E E E E E E E E E E E E E E

S307 S308 S309 S310 S311 S312 S313 S314 S315 S316 S317 S318 S319 S320 S321 S322 S323 S324 S325 S326 S327 E E E E E E E E E E E E E E E E E E E E E

S285 S286 S287 S288 S289 S290 S291 S292 S293 S294 S295 S296 S297 S298 S299 S300 S301 S302 S303 S304 S305 S306 E E E E E E E E E E E E E E E E E E E E E E

S261 S262 S263 S264 S265 S266 S267 S268 S269 S270 S271 S272 S273 S274 S275 S276 S277 S278 S279 S280 S281 S282 S283 S284 E E E E E E E E E E E E E E E E E E E E E E E E

S238 S239 S240 S241 S242 S243 S244 S245 S246 S247 S248 S249 S250 S251 S252 S253 S254 S255 S256 S257 S258 S259 S260 E E E E E E E E E E E E E E E E E E E E E E E

S215 S216 S217 S218 S219 S220 S221 S222 S223 S224 S225 S226 S227 S228 S229 S230 S231 S232 S233 S234 S235 S236 S237 E E E E E E E E E E E E E E E E E E E E E E E

S190 S191 S192 S193 S194 S195 S196 S197 S198 S199 S200 S201 S202 S203 S204 S205 S206 S207 S208 S209 S210 S211 S212 S213 S214 E E E E E E E E E E E E E E E E E E E E E E E E E

S168 S169 S170 S171 S172 S173 S174 S175 S176 S177 S178 S179 S180 S181 S182 S183 S184 S185 S186 S187 S188 S189 E E E E E E E E E E E E E E E E E E E E E E

S146 S147 S148 S149 S150 S151 S152 S153 S154 S155 S156 S157 S158 S159 S160 S161 S162 S163 S164 S165 S166 S167 E E E E E E E E E E E E E E E E E E E E E E

S124 S125 S126 S127 S128 S129 S130 S131 S132 S133 S134 S135 S136 S137 S138 S139 S140 S141 S142 S143 S144 S145 E E E E E E E E E E E E E E E E E E E E E E

S102 S103 S104 S105 S106 S107 S108 S109 S110 S111 S112 S113 S114 S115 S116 S117 S118 S119 S120 S121 S122 S123 E E E E E E E E E E E E E E E E E E E E E E

S81 S82 S83 S84 S85 S86 S87 S88 S89 S90 S91 S92 S93 S94 S95 S96 S97 S98 S99 S100 S101 E E E E E E E E E E E E E E E E E E E E E

S62 S63 S64 S65 S66 S67 S68 S69 S70 S71 S72 S73 S74 S75 S76 S77 S78 S79 S80 E E E E E E E E E E E E E E E E E E E

S44 S45 S46 S47 S48 S49 S50 S51 S52 S53 S54 S55 S56 S57 S58 S59 S60 S61 E E E E E E E E E E E E E E E E E E

S28 S29 S30 S31 S32 S33 S34 S35 S36 S37 S38 S39 S40 S41 S42 S43 E E E E E E ! ! ! ! ! E E E E E S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 E E E E E E E E E E E E E

S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 E E E E E E E E E E

S0 S1 S2 S3 S4 E E E E E

! Phragmites 0 0.125 0.25 0.5 Miles No warranty is made by Chain Lakes Survey Project: Lakeland Restoration Services ! Purple Loostrife as to the accuracy, reliability, or Swan Lake completeness of these data for S23 ¯ individual or aggregate use with other data. Original data was E Potential Survey Site and ID Date: 8/22/2013 compiled from various sources. T303T304T305T306T307T308T309T310T311T312T313T314 E E E E E E E E E E E E T288T289T290T291T292T293T294T295T296T297T298T299T300T301T302 E E ! ! ! ! ! ! ! ! ! ! E E E T271T272T273T274T275T276T277T278T279T280T281T282T283T284T285T286T287 ! ! ! ! ! E E ! ! E E E E E ! E E T254T255T256T257T258T259T260T261T262T263T264T265T266T267T268T269T270 ! ! E E E E E E E ! ! E E E E E E T237T238T239 T240T241T242T243T244T245T246T247T248T249T250T251T252T253 E ! ! E E E E E E E ! ! E E E E ! T220T221T222T223T224T225T226T227T228T229T230T231T232T233T234T235T236 E E E E E E E E E E ! ! E E E ! E T204T205T206T207T208T209T210T211T212T213T214T215T216T217T218T219 E E ! ! ! ! E E E E E ! E E E ! T201 T189T190T191T192T193T194T195T196T197T198T199T200 T202T203 E E E E E E E E E E E E ! E ! T175T176T177T178T179T180T181T182T183T184T185T186T187T188 E E E E E E E E E E E E E E T163T164T165T166T167T168T169T170T171T172T173T174 E E E E E E E E E E E E T151T152T153T154T155T156T157T158T159T160T161T162 E E E E E E E E E E E E T139T140T141T142T143T144T145T146T147T148T149T150 E E E ! E E E E E E E E T127T128T129T130T131T132T133T134T135T136T137T138 E E E ! E E E E E E E E T114T115T116T117T118T119T120T121T122T123T124T125T126 E E E E E E E E E E E E E T103T104T105T106T107T108T109T110T111 T112T113 E E E E E E E E E E E T94 T95 T96 T97 T98 T99 T100T101T102 Thompson Lake E E E E E E E E E T87 T88 T89 T90 T91 T92 T93 E E E E E E E T81 T82 T83 T84 T85 T86 E E E E E E T76 T77 T78 T79 T80 E E E E E T70 T71 T72 T73 T74 T75 E E E E E E T59 T60 T61 T67 T68 T69 ! T62 E E E T5!8 ! T63 T64 T65 T66 T44T45 T48 T4!9 T50 ! ! T55 T56 T57! T47 ! T51 T52 T5!3 T54 E E! ET46E E E E E ! ! ! ! ! T32 T33 T34 T35 T36 T37 T38 T39 T40 T41 T42 T43 E E E E E E E E E E E E T23 T24 T25 T26 T27 T28 T29 T30 T31 E E E E E E E E E T15 T16 T17 T18 T19 T20 T21 T22 E E E E E E E E T8 T9 T10 T11 T12 T13 T14 E E E E E E E T4 T5 T6 T7 E E E E Anderson Lake T1 T2 T3 E E E T0 E

0 0.125 0.25 0.5 Miles No warranty is made by Chain Lakes Survey Project: ! Lakeland Restoration Services E. Milfoil as to the accuracy, reliability, or completeness of these data for T23 Thompson Lake E ¯ individual or aggregate use with Potential Survey Site and ID other data. Original data was Date: 8/22/2013 compiled from various sources.

APPENDIX B CONSULTATION RECORD

Avista’s Letter to Coeur d’Alene Tribe

2013 Coeur d’Alene Lake Non-Tribal Waters B - 1 February 25, 2014 Aquatic Weed Summary Report

Coeur d’Alene Tribe’s Comments

2013 Coeur d’Alene Lake Non-Tribal Waters B - 2 February 25, 2014 Aquatic Weed Summary Report

Avista’s Response to the Coeur d’Alene Tribe comments:

On pages 3 and 4, Chatcolet Lake was changed to south end of Coeur d’Alene Lake.

On page 3, the sentence “With this, many of the known populations of milfoil have been reduced or eliminated” was changed to “With this, anecdotal evidence suggests that many of the known populations of milfoil have been reduced or eliminated.”

On page 4, 101 acres were changed to 99 acres.

2013 Coeur d’Alene Lake Non-Tribal Waters B - 3 February 25, 2014 Aquatic Weed Summary Report

Avista’s Letter to Idaho Department of Environmental Quality

2013 Coeur d’Alene Lake Non-Tribal Waters B - 4 February 25, 2014 Aquatic Weed Summary Report

Idaho Department of Environmental Quality Response

2013 Coeur d’Alene Lake Non-Tribal Waters B - 5 February 25, 2014 Aquatic Weed Summary Report

Avista’s Letter to Idaho State Department of Agriculture

2013 Coeur d’Alene Lake Non-Tribal Waters B - 6 February 25, 2014 Aquatic Weed Summary Report

Idaho State Department of Agriculture Response

2013 Coeur d’Alene Lake Non-Tribal Waters B - 7 February 25, 2014 Aquatic Weed Summary Report

Avista’s Letter to Kootenai County Noxious Weed Control Board

2013 Coeur d’Alene Lake Non-Tribal Waters B - 8 February 25, 2014 Aquatic Weed Summary Report

Kootenai County Noxious Weed Control Board Response

2013 Coeur d’Alene Lake Non-Tribal Waters B - 9 February 25, 2014 Aquatic Weed Summary Report