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USGS Daily Statistics for the Nation

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 -> 2025-09-30)

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
1 207 272 198 165 169 158 96 72 71 75 110 199
2 206 237 207 169 167 153 94 72 71 74 117 194
3 210 227 215 161 164 153 94 72 70 74 116 205
4 227 236 213 158 160 153 93 71 70 74 123 224
5 245 236 213 173 162 148 92 71 70 73 125 226
6 244 229 211 184 159 148 91 71 70 73 138 215
7 284 226 198 184 160 163 88 71 70 76 154 214
8 350 226 168 188 157 167 86 71 71 77 153 228
9 308 230 174 186 155 151 96 70 72 74 164 227
10 302 198 164 177 155 147 95 70 72 78 172 209
11 290 182 160 171 165 149 91 70 72 79 174 198
12 289 179 162 155 160 146 86 70 71 77 173 206
13 284 181 160 150 170 150 88 71 73 78 189 212
14 283 202 162 161 180 148 87 70 78 78 214 213
15 287 201 172 163 170 152 85 70 73 80 205 211
16 295 204 169 165 164 135 82 70 73 87 206 211
17 322 188 159 165 155 124 80 70 74 85 220 188
18 323 173 157 159 149 121 77 70 74 85 203 194
19 293 184 168 150 150 119 76 69 76 87 186 194
20 293 197 174 148 157 110 76 71 75 93 181 185
21 282 189 166 148 156 108 75 70 74 99 171 173
22 236 190 156 147 155 107 75 71 73 98 173 171
23 225 182 158 149 157 108 74 70 73 95 179 170
24 237 172 205 166 149 113 75 71 74 96 240 176
25 265 172 201 171 144 113 74 71 75 98 226 172
26 266 176 180 171 152 108 74 70 75 101 201 175
27 251 183 168 175 150 102 73 71 76 100 199 184
28 232 189 149 180 149 93 73 70 76 109 209 181
29 238 197 151 177 157 95 73 70 75 110 222 185
30 246   162 177 161 97 72 71 78 107 220 195
31 261   162   158   72 71   111   206