Onondaga Lake Syracuse, New York Harbor Brook C:\Projects\Onondaga Lake_SMUS\Figures\Preferred Remedy SMU-1 (11-24-04).mxd - 11/24/2004 @ 2:28:19 PM PREFERRED REMEDY FOR SMU 1 NOTES Bathymetric contours are at 1-meter intervals based on current bathymetry All listed depths based on estimated post-remediation bathymetry unless otherwise noted Habitat enhancement would also include placement of large woody debris structures in water depths between 4 and 15 feet to provide cover and increase foraging opportunities for fish. SMU 1 SMU-7 SMU 8 SMU 2 -5 -6 -9 -1 -3 -5 -7 -9 SMU-6 690 -11 690 S29 S338 S401 S309 S340 S341 S402 S342 S310 S344 S403 S343 S345 S346 S347 S21 S404 S15 S405 S312 S20 S311 S348 S349 S350 S14 S406 Wastebed B East Flume -13 SYW-19 Alternative 4.A.4 - Dredging to Remove 25% (2 meter depth average) of the In-Lake Waste Deposit plus Hot Spots / Isolation Capping to Mean PECQ1 plus Mercury PEC Area Dredged to Maximum Habitat Depth after Capping (to current 13.5' depth, 61.9 ac) Sand - Recreational / Habitat Buffer Area Over Isolation Cap (shoreline to 20' offshore, 1.9 ac) Sand - Submerged Macrophyte / Benthic Area Over Isolation Cap (20' offshore - 6' depth, 5.8 ac) Fine Gravel - Fish Spawning Habitat Over Isolation Cap (6' depth to 15' depth, 57.3 ac) Sand - Benthic Substrate Area Over Isolation Cap (15' depth - 29.5' (9m) depth, 19.8 ac) Wetland Boundary of Theissian Polygon Surrounding Sample Location Wastebed B / Harbor Brook IRM Barrier Wall (part of IRM, location is conceptual. Dashed section is conceptual) Sample Location 0 250 500 125 Feet