u Evaluation of Public Safety at Run•of•River Dams An Illinois Statewide Program Submitted To: Capital Development Board of Illinois July 20, 2007 CTE AECOM CDB Project # 102•000•061 Evaluation of Public Safety at Run•of•River Dams An Illinois Statewide Program July 20, 2007 Executive Summary Section 1 • General.....................................................................................................................1 1.1 Authority ........................................................................................................................1 1.2 Purpose .........................................................................................................................1 1.3 Scope of the Study.........................................................................................................1 1.4 Definitions......................................................................................................................6 1.5 Report Organization.......................................................................................................9 1.6 Dams and Locations ......................................................................................................9 1.7 Overview of Public Safety Issues at Run•of•River Dams..............................................11 Section 2 • Signage...................................................................................................................15 2.1 Limitations and Future Needs ......................................................................................15 2.2 General Approach........................................................................................................17 2.3 Signage Guidelines......................................................................................................17 2.4 Kankakee River Dams Signage Plans..........................................................................32 2.4.1 Momence Dam................................................................................................33 2.4.2 Kankakee Dam................................................................................................34 2.4.3 Wilmington Dam..............................................................................................35 2.4.4 Wilmington Millrace Dam.................................................................................36 2.5 Rock River Dams Signage Plans .................................................................................37 2.5.1 Oregon Dam ...................................................................................................38 2.5.2 Sinnissippi Dam ..............................................................................................39 2.5.3 Lower Sterling Dam.........................................................................................40 2.5.4 Sears Dam......................................................................................................41 2.5.5 Steel Dam .......................................................................................................42 2.6 Fox River Dams Signage Plans ...................................................................................43 2.6.1 McHenry (Stratton L&D) Dam..........................................................................44 2.6.2 Algonquin Dam................................................................................................45 2.6.3 Carpentersville Dam........................................................................................46 2.6.4 Elgin Kimball St. Dam......................................................................................47 2.6.5 South Elgin Dam .............................................................................................48 2.6.6 St. Charles Dam..............................................................................................49 2.6.7 Geneva Dam...................................................................................................50 2.6.8 Batavia Dam ...................................................................................................51 2.6.9 North Aurora Dam...........................................................................................52 2.6.10 Aurora East Dam.............................................................................................53 2.6.11 Montgomery Dam............................................................................................54 2.6.12 Yorkville Dam..................................................................................................55 2.7 Des Plaines River Dam Signage Plan..........................................................................56 2.7.1 Hofmann Dam.................................................................................................57 2.8 Vermillion River Dam Signage Plan .............................................................................58 TOC•1 Evaluation of Public Safety at Run•of•River Dams An Illinois Statewide Program July 20, 2007 2.8.1 Danville Dam...................................................................................................59 2.9 Sangamon River Dam Signage Plans..........................................................................60 2.9.1 Riverside (Carpenter) Park Dam .....................................................................61 2.9.2 Petersburg Dam..............................................................................................62 Section 3 • Public Awareness Program .....................................................................................63 Section 4 • Structural Options ...................................................................................................64 4.1 Limitations and Future Design Needs ..........................................................................64 4.2 General Approach........................................................................................................65 4.3 Temporary Rock Fill Structural Option .........................................................................67 4.4 Permanent Structural Options......................................................................................74 4.4.1 Full Bypass Channel .......................................................................................74 4.4.2 Riffle Pool Rock Ramp ....................................................................................80 4.4.3 In•Stream Bypass Channel .............................................................................85 4.4.4 Dam Face Modification....................................................................................90 4.5 Dam Removal..............................................................................................................94 4.5.1 General Approach...........................................................................................94 4.5.2 Dam Removal Options ....................................................................................99 4.5.3 Cost Items Associated with Dam Removal....................................................100 4.6 Kankakee River Dams ...............................................................................................104 4.6.1 Momence Dam..............................................................................................104 4.6.1.1 Existing Conditions Overview ........................................................104 4.6.1.2 Options Assessment......................................................................106 4.6.1.2.1 Temporary Rock Fill....................................................106 4.6.1.2.2 Dam Removal .............................................................106 4.6.1.2.3 Full Bypass Channel ...................................................109 4.6.1.2.4 Riffle Pool Rock Ramp................................................109 4.6.1.2.5 In•Stream Bypass Channel .........................................109 4.6.1.2.6 Dam Face Modification ...............................................109 4.6.1.2.7 Summary of Cost ........................................................109 4.6.2 Kankakee Dam..............................................................................................112 4.6.2.1 Existing Conditions Overview ........................................................112 4.6.2.2 Options Assessment......................................................................114 4.6.2.2.1 Temporary Rock Fill....................................................114 4.6.2.2.2 Dam Removal .............................................................114 4.6.2.2.3 Full Bypass Channel ...................................................114 4.6.2.2.4 Riffle Pool ...................................................................114 4.6.2.2.5 In•Stream Bypass Channel .........................................114 4.6.2.2.6 Dam Face Modification ...............................................114 4.6.2.2.7 Summary of Cost ........................................................114 4.6.3 Wilmington Dam............................................................................................116 TOC•2 Evaluation of Public Safety at Run•of•River Dams An Illinois Statewide Program July 20, 2007 4.6.3.1 Existing Conditions Overview ........................................................116 4.6.3.2 Options Assessment......................................................................117 4.6.3.2.1 Temporary Rock Fill....................................................117