Submerged Substrate Mapping in the Thunder Bay Region of Lake Superior Thunder Bay Harbour Survey Effort  207.4 km of sounding lines  511,445 soundings  16 underwater video sites Thunder Bay Harbour: Substrate classes and bathymetry . weThunder Bay Substrate Study '1 Thunder Bay Substrate Study Thunder Bay Harbour g. . Thunder Bay Harbour 536F000 Bathymetry - 4 - Substrate Classes -. I E: :12 Cl Fine-grain . - l: - 13 - Cobble . - a _14 - Unde?ned Fine on Hard Unde?ned Fineegrain (soft) Fine-grain - Ip sandwaves - 5354500 5354900 5353900 BEEUUD 331?000 JESUUD 337000 West Shore Survey Effort  182.5 km of sounding lines  457,327 soundings  45 underwater video sites West Shore Region: Substrate classes and bathymetry 331000 333000 33 5000 337000 331000 333000 335000 337000 5353500 under Bay Substrate Study -- - f. . Thunder Bay Substrate Study West Shore Region West Shore Region 5352000 5352000 5348000 5349000 Bathymetry - Substrate Classes 5345000 Cobble . . I I 7 - ?4 Unde?ned 3 I: - 15 Fine on Hard . El 9 - 16 Fine-grain (soft) 5345000 5344000 5344000 Fine-grain - lp sandwaves Fine-grain - soft, irregular SAV 5342000 5342000 33100D 335000 33100D 335000 Welcome Island Survey Effort  84.2 km of sounding lines  192,804 soundings  28 Underwater video sites 5359000 5358000 535?000 Welcome Island: Area analysis of substrate classes and bathymetry Thunder Bay Substrate Study Welcome Islands 3410100 Substrate Classes Fine-grain (glc) - Cobble - Unde?ned Fine on Hard Unde?ned Fine-grain (soft) Fine-grain - lp sandwaves - 5W 342000 5359000 5358000 5357000 Thunder Bay Substrate Study Welcome Islands 341000 341000 342003 312000 Bathymetry -4 -16 -5 -17 -6 -1B -19 -20 -21 -22 -23 -24 -25 -26 5359000 5358000 5357000 Summary of the areal coverages of the substrate classes Substrate Class fine-grain (g\c) Thunder Bay Harbour 2,521,404 cobble 576,090 Undefined 353,349 Fine on Hard 788,274 Fine on soft 1,051,866 Fine-grain, lp sandwaves 3,065,508 West Shore 1,589,499 1,291,104 Welcome Islands 619,470 1,418,742 3,681 1,519,920 771,327 8,609,463 1,737 322,641 356,310 512,991 Fine-grain, irregular surface 279,135 86,175 111,213 SAV 128,034 27,279 5,796 8,763,660 13,898,448 3,348,900 8.764 13.898 3.349 Areas Surveyed (m2 ) Areas Surveyed (km2 ) Fine-grain (g\c): fine-grained sediment with sparse gravel or cobble visible Fine-grain, lp sandwaves: fine-grained sediment with low profile well defined waves Examples of Substrate Classes 33 5000 336000 337' 000 333000 Thunder Bay S?bstrate Thunder Bay Substrate Study I Harbour ?011 DB. 0 . Thunder Bay Harbour UTH GS 5368189.59N 338591.51E 2018/10/30 11i02302 532370130 Thunder Bay Substrate Harbour u014 UTH 05 538T408.81N 338053.68E 2012/10/30 10 18i28 Substrate Classes I: Fine-grain - Cobble - Undefined Fine on Hard - Undefined - Fine?grain (soft) Fine-grain - lp sandwaves 05 53838T4.94N 338343.14E 8012/10/30 09:88.46 5362000 . s" - ?4 .V . Examples of Substrate Classes amt t-s. - HestSh05e?wOOB. Thunder Bay Substrate Study I I West Shore Region WeslShore_CM 9' r1? 5351 I300 I 9 UTM - :4 5350586 83N 334198. 89E i 2012/10/88 11 21: .W ntShoreJ 2, WestShore_09 .. I WestShore_07 . 5349EIIJG Thunder Bay Substrate TT. HestSl-wore-vOQv . D5, 5343030 UTH 5349038, 83N 333570. 33E Substrate Classes 2012/10/38 11 140 Fine?grain - Cobble - ?ma?ned Thunder Ba; ubstrate I HestShore-uOEB 09 Fine?grain (soft) "j - Fine-grain - Ip sandwaves Fine-grain - soft, irregular - SAV s" 5342mm a UTH ~5J??%ww 5348589l31N 8012/10/28 12:23: 334-000 337000 333000 Examples of Substrate Classes mm ?m0 Thunder VBag.Subsfraie TT.E [8.4 UTH 05 5358098.T4N 341TT3.T9E 2012/10/29 ,4 . 1 Thunder 1Ba??gubstrate TT Helcome Is U012 DB 05 535T239.T3N 940952.995 2012/10/29 15:19:50 Thunder Bay Subs?rate TT Helcome D3 11 Substrate Classes 5] ,1 a (q Fine-grain #150} 1 I - Cobble - Unde?ned Fine on Hard - Unde?ned - Fine-grain (soft) [235599109995 53569491790 341150.68E 2012/10/29 15:27: :61: Summary