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USGS Daily Statistics for Washington

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The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 12148300 SF TOLT RIVER BL REGULATING BASIN NR CARNATION, WA


King County, Washington
Hydrologic Unit Code 17110010
Latitude  47°41'49", Longitude 121°47'10" NAD27
Drainage area 29.6  square miles
Gage datum 646.84 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1981-10-01 -> 2024-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 208 276 200 163 169 156 96 72 70 75 110 202
2 207 240 209 168 167 151 94 72 71 74 117 196
3 211 230 215 159 164 150 94 72 70 74 116 208
4 228 240 211 156 160 149 93 71 70 74 123 227
5 246 240 211 172 162 145 92 71 70 73 125 230
6 245 233 209 184 159 145 91 71 70 73 139 219
7 282 229 199 183 160 161 88 71 70 76 155 217
8 344 230 170 186 157 165 86 71 71 77 154 230
9 303 234 175 184 155 151 96 70 72 74 166 230
10 303 201 166 174 155 148 95 70 72 78 174 212
11 293 185 161 168 165 150 91 70 72 79 176 200
12 293 181 164 153 160 147 86 70 71 77 175 209
13 288 184 162 147 170 151 88 70 73 78 191 215
14 287 205 163 159 182 149 87 70 78 79 216 216
15 292 203 173 163 172 154 85 70 73 80 208 214
16 300 207 170 166 166 136 82 70 73 87 209 214
17 327 190 160 165 157 125 80 70 74 85 222 191
18 329 175 158 159 150 122 77 70 74 85 205 195
19 298 183 170 150 151 119 76 69 76 87 188 196
20 298 189 176 148 158 110 75 71 75 93 182 187
21 286 181 168 148 157 108 75 70 74 99 173 175
22 240 190 157 147 155 107 75 71 73 99 175 173
23 229 180 158 149 158 108 74 70 73 95 181 172
24 241 172 201 166 150 114 75 71 74 96 243 177
25 270 171 197 171 145 113 73 70 75 99 229 173
26 271 175 176 171 153 109 73 70 74 101 204 175
27 255 183 163 175 150 101 73 70 76 99 202 184
28 235 190 143 180 150 93 73 70 76 109 212 181
29 242 197 145 177 157 95 73 70 76 110 225 185
30 250   158 177 160 97 72 70 78 107 223 194
31 265   159   156   72 70   111   207