Table 1. Sub-watersheds of the St. Lawrence II Watershed Project Area. "Class" describes the sub-watershed's outflow. I= Internally draining; P= Pond; R=Riverine.
Class | # of Sub-watersheds | Minimum Area (ac) | Maximum Area (ac) | Minimum Area (ha) | Maximum Area (ha) | |
Raquette/Grasse Watershed | I | 15 | 4.0 | 217.3 | 1.6 | 87.9 |
P | 575 | 6.1 | 593,359.0 | 2.5 | 240124.2 | |
R | 28 | 1.9 | 507,158.0 | 0.8 | 205239.9 | |
Salmon/Trout Watershed | I | 2 | 10.8 | 78.3 | 4.4 | 31.7 |
P | 78 | 5.8 | 65,511.3 | 2.3 | 26511.5 | |
R | 10 | 101.6 | 77,021.7 | 41.1 | 31169.6 | |
Entire Project Area | 708 | 4.0 | 593,359.0 | 1.6 | 240124.2 |
Table 2. Major wetland cover types of the St. Lawrence II project area.
Wetland Classification | NWI Cover Type Label | Representative Plant Species |
Open Water | OW | Pondweed, milfoil, eelgrass, or none |
Persistent leaved emergent | EM1 | Cattail, grasses, sedges |
Broad-leaved deciduous scrub shrub | SS1 | Speckled alder, willow |
Needle-leaved deciduous scrub shrub | SS2 | Eastern larch |
Broad-leaved evergreen scrub shrub | 3 | Leatherleaf |
Needle-leaved evergreen scrub shrub | SS4 | Stunted or young black spruce or balsam fir |
Dead scrub shrub | SS5 | Dead shrubs |
Broad-leaved deciduous forested | FO1 | Red maple, silver maple, black/green ash |
Needle-leaved deciduous forested | FO2 | Eastern larch |
Needle-leaved evergreen forested | FO4 | Balsam fir, red and black spruce, hemlock, white cedar |
Dead forested | FO5 | Standing dead trees |
Rooted vascular aquatic bed | AB3 | Submerged aquatic vegetation |
Unconsolidated shore - cobble/gravel | US1 | unvegetated |
Unconsolidated shore - sand | US2 | unvegetated |
Label | Acres | Ha | % |
FO4 | 51247.8 | 20739.3 | 29.1 |
SS4 | 46241.5 | 18713.3 | 26.3 |
SS1 | 39093.1 | 15820.5 | 22.2 |
SS3 | 12784.1 | 5173.6 | 7.3 |
Palustr. OW | 9408.8 | 3807.6 | 5.3 |
EM1 | 7535.3 | 3049.5 | 4.3 |
FO1 | 4749.9 | 1922.2 | 2.7 |
FO5 | 3108.4 | 1257.9 | 1.8 |
SS2 | 777.6 | 314.7 | 0.4 |
FO2 | 710.9 | 287.7 | 0.4 |
SS5 | 305.0 | 123.4 | 0.2 |
US1 | 103.9 | 42.0 | 0.1 |
US2 | 7.4 | 3.0 | 0.004 |
AB3 | 2.5 | 1.0 | 0.001 |
Class2 | |||||||||||||||
Class1 | /EM1 | /FO1 | /FO2 | /FO4 | /FO5 | /OW | /SS1 | /SS2 | /SS3 | /SS4 | /SS5 | /US1 | /US2 | None | Total |
AB3 | 2.5 | 2.5 | |||||||||||||
EM1 | 1590.7 | 0.8 | 5943.9 | 7535.3 | |||||||||||
FO1 | 106.2 | 559.8 | 3.0 | 42.7 | 1716.5 | 84.6 | 738.0 | 3250.8 | |||||||
FO2 | 12.6 | 86.8 | 39.3 | 10.9 | 46.1 | 104.1 | 55.9 | 355.6 | |||||||
FO4 | 1513.6 | 1496.5 | 355.3 | 102.6 | 112.4 | 2945.0 | 487.2 | 30032.4 | 13467.5 | 50512.6 | |||||
FO5 | 92.3 | 2.6 | 88.6 | 2582.6 | 99.3 | 14.7 | 33.4 | 23.3 | 66.0 | 3002.9 | |||||
OW | 4422.1 | 4422.1 | |||||||||||||
SS1 | 25004.8 | 365.0 | 4.5 | 804.0 | 1907.4 | 13.1 | 26.3 | 4.3 | 2756.9 | 30886.3 | |||||
SS2 | 9.0 | 2.5 | 9.5 | 110.2 | 0.7 | 132.0 | |||||||||
SS3 | 5601.8 | 133.5 | 812.0 | 296.1 | 1413.4 | 1499.7 | 9756.4 | ||||||||
SS4 | 5011.5 | 26.2 | 2590.0 | 338.6 | 1660.9 | 5.0 | 28.0 | 0.6 | 2873.4 | 12535.1 | |||||
SS5 | 82.6 | 129.0 | 1.2 | 5.2 | 20.8 | 1.8 | 240.5 | ||||||||
US1 | 2.2 | 75.3 | 77.6 | ||||||||||||
US2 | 1.6 | 1.6 | |||||||||||||
TOTAL | 37434.3 | 1499.1 | 355.3 | 735.2 | 105.6 | 4986.7 | 8211.2 | 645.6 | 3027.7 | 33711.3 | 64.5 | 26.3 | 5.8 | 31902.8 | 122711.3 |
Area in hectares
Class2 | |||||||||||||||
Class1 | /EM1 | /FO1 | /FO2 | /FO4 | /FO5 | /OW | /SS1 | /SS2 | /SS3 | /SS4 | /SS5 | /US1 | /US2 | None | Total |
AB3 | 1.0 | 1.0 | |||||||||||||
EM1 | 643.7 | 0.3 | 2405.4 | 3049.5 | |||||||||||
FO1 | 43.0 | 226.5 | 1.2 | 17.3 | 694.7 | 34.2 | 298.7 | 1315.6 | |||||||
FO2 | 5.1 | 35.1 | 15.9 | 4.4 | 18.7 | 42.1 | 22.6 | 143.9 | |||||||
FO4 | 612.5 | 605.6 | 143.8 | 41.5 | 45.5 | 1191.8 | 197.2 | 12153.7 | 5450.1 | 20441.8 | |||||
FO5 | 37.3 | 1.0 | 35.9 | 1045.1 | 40.2 | 6.0 | 13.5 | 9.4 | 26.7 | 1215.2 | |||||
OW | 1789.6 | 1789.6 | |||||||||||||
SS1 | 10119.1 | 147.7 | 1.8 | 325.4 | 771.9 | 5.3 | 10.7 | 1.8 | 1115.7 | 12499.3 | |||||
SS2 | 3.7 | 1.0 | 3.8 | 44.6 | 0.3 | 53.4 | |||||||||
SS3 | 2267.0 | 54.0 | 328.6 | 119.8 | 572.0 | 606.9 | 3948.3 | ||||||||
SS4 | 2028.1 | 10.6 | 1048.5 | 137.0 | 672.1 | 2.0 | 11.3 | 0.3 | 1162.8 | 5072.8 | |||||
SS5 | 33.4 | 52.2 | 0.5 | 2.1 | 8.4 | 0.7 | 97.3 | ||||||||
US1 | 0.9 | 30.5 | 31.4 | ||||||||||||
US2 | 0.6 | 0.6 | |||||||||||||
TOTAL | 15149.2 | 606.7 | 143.8 | 297.5 | 42.7 | 2018.1 | 3323.0 | 261.3 | 1225.3 | 13642.5 | 26.1 | 10.7 | 2.3 | 12910.7 | 49659.7 |
Class2 | |||||||||||||||
Class1 | /EM1 | /FO1 | /FO2 | /FO4 | /FO5 | /OW | /SS1 | /SS2 | /SS3 | /SS4 | /SS5 | /US1 | /US2 | None | Total |
AB3 | 1 | 1 | |||||||||||||
EM1 | 437 | 1 | 2065 | 2503 | |||||||||||
FO1 | 38 | 213 | 2 | 15 | 297 | 52 | 725 | 1342 | |||||||
FO2 | 5 | 14 | 11 | 4 | 7 | 11 | 17 | 1342 | |||||||
FO4 | 434 | 584 | 34 | 18 | 58 | 675 | 53 | 3370 | 4794 | 10020 | |||||
FO5 | 19 | 1 | 20 | 976 | 29 | 3 | 6 | 4 | 28 | 1086 | |||||
OW | 3006 | 3006 | |||||||||||||
SS1 | 3695 | 146 | 2 | 119 | 536 | 2 | 1 | 2 | 1093 | 5596 | |||||
SS2 | 2 | 2 | 1 | 12 | 1 | 18 | |||||||||
SS3 | 601 | 32 | 131 | 11 | 195 | 320 | 1290 | ||||||||
SS4 | 1196 | 15 | 616 | 30 | 206 | 1 | 4 | 1 | 878 | 2947 | |||||
SS5 | 10 | 47 | 1 | 1 | 5 | 1 | 65 | ||||||||
US1 | 1 | 12 | 13 | ||||||||||||
US2 | 3 | 3 | |||||||||||||
TOTAL | 6000 | 585 | 34 | 247 | 20 | 1728 | 1764 | 45 | 390 | 4188 | 10 | 1 | 4 | 12943 | 27959 |
AREA | NUMBER | |||||||
Class1 | "b" (ac) | "b" (Ha) | Total class area (ac) | Total class area (Ha) | % total area | "b" | Total polygon # in class | & total # |
AB3 | 2.5 | 1.0 | 0.0 | 1 | 0.0 | |||
EM1 | 4232.1 | 1712.7 | 7535.3 | 3049.5 | 56.2 | 1210 | 2503 | 48.3 |
FO1 | 230.8 | 93.4 | 3250.8 | 1315.6 | 7.1 | 68 | 1342 | 5.1 |
FO2 | 355.6 | 143.9 | 0.0 | 69 | 0.0 | |||
FO4 | 1330.4 | 538.4 | 50512.6 | 20441.8 | 2.6 | 324 | 10020 | 3.2 |
FO5 | 2869.6 | 1161.3 | 3002.9 | 1215.2 | 95.6 | 1036 | 1086 | 95.4 |
POW | 3112.8 | 1263.7 | 4422.1 | 1789.6 | 70.6 | 2226 | 3006 | 74.1 |
SS1 | 9723.5 | 3935.0 | 30886.3 | 12499.3 | 31.5 | 1569 | 5596 | 28.0 |
SS2 | 9.0 | 3.7 | 132.0 | 53.4 | 6.8 | 2 | 18 | 11.1 |
SS3 | 736.6 | 298.1 | 9756.4 | 3948.3 | 7.6 | 122 | 1290 | 9.5 |
SS4 | 778.9 | 315.2 | 12535.1 | 5072.8 | 6.2 | 231 | 2947 | 7.8 |
SS5 | 234.4 | 94.9 | 240.5 | 97.3 | 97.5 | 61 | 65 | 93.8 |
US1 | 77.6 | 31.4 | 0.0 | 13 | 0.0 | |||
US2 | 1.6 | 0.6 | 0.0 | 3 | 0.0 | |||
TOTAL | 23268.1 | 9416.3 | 122711.3 | 49659.7 | 19.0 | 6849 | 27959 | 24.5 |
WATER REGIME acres (ha) |
Class1 | B | D | E | F | H | TOTAL |
AB3 | 2.5 (1.0) |
2.5 (1.0) |
||||
EM1 | 800.4 (323.9) |
1.6 (0.7) |
4938.3
(1998.4) |
154.0
(62.3) |
1590.7
(643.7) |
7485.0
(3029.1) |
FO1 | 1513.8 (612.6) |
3.5 (1.4) |
1674.5 (677.6) |
14.6 (5.9) |
42.7 17.3() |
3249.0 (1314.1) |
FO2 | 339.1 (137.2) |
16.5 (6.7) |
16.5 (6.7) |
372.1 (150.6) |
||
FO4 | 45105.6 (18253.7) |
6.3 (2.5) |
5072.0 (2052.6) |
41.7 (16.9) |
162.8 (65.9) |
50388.4 (20391.5) |
FO5 | 113.3 (45.8) |
143.3 (58.0) |
88.0 (35.6) |
2658.4 (1075.8) |
3002.9 (1215.2) |
|
OW | 3.0 (1.2) |
4397.1 (1779.4) |
4400.0 (1780.6) |
|||
SS1 | 6328.3 (2561.0) |
15.6 (6.3) |
21722.2 (8790.7) |
2285.5 (924.9) |
504.2 (204.0) |
30855.7 (12486.9) |
SS2 | 123.0 (49.8) |
9.0 (3.7) |
132.0 (53.4) |
|||
SS3 | 8551.8 (3460.8) |
699.0 (282.9) |
338.4 (137.0) |
163.4 (66.1) |
9752.6 (3946.8) |
|
SS4 | 9777.3 (3956.7) |
5.8 (2.3) |
2570.4 (1040.2) |
122.8 (49.7) |
33.3 (13.5) |
12509.5 (5062.4) |
SS5 | 3.0 (1.2) |
25.9 (10.5) |
66.5 (26.9) |
145.2 (58.8) |
240.5 (97.3) |
|
US1 | 13.3 (5.4) |
62.0 (25.1) |
2.2 (0.9) |
77.6 (31.4) |
||
US2 | 1.0 (0.4) |
0.6 (0.2) |
1.6 (0.6) |
|||
TOTAL | 72672.7 (29409.7) |
32.8 (13.3) |
36933.6 (14946.6) |
3127.9 (1265.8) |
9702.3 (3926.4) |
122469.4 (49561.8) |
% TOT | 59.3 | 0.03 | 30.2 | 2.6 | 7.9 | 100.0 |
Cover Type | Common Species | Number of Wetlands | Acres | Hectares |
AB3-rooted vascular aquatic bed | submerged aquatic vegetation | 1 | 2.5 | 1.0 |
EM1-persistent leaved emergent | cattails, grasses, sedges | 113 | 346.2 | 140.1 |
FO1-forested broad-leaved deciduous | Red maple, silver maple, black/green ash | 21 | 20.5 | 8.3 |
FO4-forested needle-leaved evergreen | balsam fir, red and black spruce | 386 | 1477.8 | 598.0 |
FO5-forested dead | standing dead trees | 34 | 80.9 | 32.7 |
OW-open water | pondweed, milfoil, eelgrass, or no vegetation | 242 | 1427.9 | 577.9 |
SS1-scrub shrub broad-leaved deciduous | speckled alder, willow | 216 | 1058.3 | 428.3 |
SS3-scrub shrub broad-leaved evergreen | leatherleaf | 52 | 595.3 | 240.9 |
SS4-scrub shrub needle-leaved evergreen | stunted or young black spruce or balsam fir | 120 | 332.1 | 134.4 |
Wetland | River Basin | Estimated Size* | Description |
Madawaska Wetland | St. Regis | 3000ac* (1214 ha) |
Series of open bogs with Sphagnum-sedge-leatherleaf mats surrounded by mature stands of black spruce and tamarack with scattered balsam fir and white pine. |
Waverly Bog | St. Regis | 2190 ac (886 ha) |
Flat, continuous, peat mat with abundant sedges. |
Osgood River Muskeg | St. Regis | 1753 ac (709 ha) |
Black spruce tamarack swamp. |
Spring Pond Bog | St. Regis/ Raquette | 828 ac (335 ha) |
Nutrient-poor, sedge-Sphagnum patterned fen and low-shrub raised bog with ponds. |
Bay Pond Bog | St. Regis | 300 ac* (121 ha) |
Nutrient-poor, sedge-Sphagnum patterned fen and low-shrub raised bog. |
Wheeler Marsh | St. Regis | 879 ac (356 ha) |
Poor fen. |
Jones Pond Outlet | St. Regis | 135 ac (55 ha) |
Floating mat with ericaceous component and cattail component. |
Roiley Bog | St. Regis | 212 ac (86 ha) |
Poor fen with areas of Sphagnum bog. |
Deer Pond Marsh | St. Regis/ Saranac | +1000 ac* (+405 ha) |
Complex wetland system with deep organic deposits. |
Massawepie Mire | Grasse | 5000 ac* (2023 ha) |
Largest open heath-Sphagnum mats in the Northeast, Estimated peatland acreage: 900 ac (364 ha) (Worley 1982). |
Grasse River Bog | Grasse | 1005 ac (407 ha) |
Poor fen on north shore of Grasse River Flow. |
Sevey Bog | Raquette/ Grasse | 546 ac (221 ha) |
Poor fen, hemlock hardwood swamp, spruce flats. |
Tupper Lake Marsh | Raquette | 1100 ac* (445 ha) |
Deep emergent marsh. |
Hitchins Bog | Raquette | 1098 ac (444 ha) |
Poor fen with patterning evident. |