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USGS Daily Statistics for Connecticut

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ICE EFFECTS ON STREAMFLOW - During winter, ice formation may cause stage and discharge values to appear higher than expected. Ice effects may be minor (occurring only at night and early morning) with baseline flows obvious, or the effects may be major (stage constantly increases over several days or weeks) resulting in greatly erroneous discharge. Streamgages experiencing minor ice conditions will continue to display stage and discharge values to enable users to estimate the approximate base-line stage and discharge. Streamgages experiencing major ice conditions will have the discharge record temporarily disabled to prevent use of erroneous discharge values. The discharge record will resume when it is determined that ice conditions are no longer present. Daily mean discharges during periods of ice effect will be estimated after detailed data analysis.

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 01186500 STILL RIVER AT ROBERTSVILLE, CT


Litchfield County, Connecticut
Hydrologic Unit Code 01080207
Latitude  41°58'04.52", Longitude  73°02'00.40" NAD83
Drainage area 85.0  square miles
Gage datum 510.24 feet above NGVD29
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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 1948-10-01 -> 2020-09-30)

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
1 206 167 194 452 238 194 98 69 55 120 127 189
2 180 198 206 444 222 182 81 62 60 118 130 206
3 173 252 196 476 220 168 76 60 56 111 195 186
4 166 215 217 501 210 158 82 67 51 102 172 173
5 180 194 216 541 195 160 83 89 44 89 184 180
6 192 172 266 472 213 225 75 66 72 95 165 183
7 170 182 302 430 213 225 65 59 84 94 160 205
8 170 168 262 379 196 190 57 51 79 99 163 200
9 203 154 277 339 200 159 54 62 66 134 185 196
10 187 152 258 381 203 150 56 92 53 115 164 199
11 193 199 290 361 225 132 53 82 67 97 163 205
12 194 190 280 324 240 132 48 81 69 104 173 220
13 191 186 291 334 246 143 58 82 65 94 169 216
14 200 184 316 332 221 172 77 86 58 98 161 208
15 190 183 301 318 200 162 67 73 54 199 162 199
16 188 191 292 435 204 148 77 59 64 214 151 178
17 167 177 280 430 206 130 59 56 81 155 174 168
18 186 181 277 347 192 115 54 106 88 126 156 180
19 194 178 288 307 198 112 45 418 93 127 132 175
20 188 207 328 315 203 94 51 105 84 199 154 156
21 178 212 330 281 188 98 64 63 73 171 183 253
22 176 218 395 256 161 98 61 59 79 136 171 222
23 191 204 356 274 152 102 57 56 78 123 175 181
24 212 229 321 274 181 108 67 50 93 153 148 199
25 264 274 320 259 200 92 57 42 109 141 166 203
26 257 257 325 241 177 88 56 39 125 136 203 196
27 276 218 364 256 158 78 68 38 153 121 206 198
28 259 207 344 246 135 88 72 127 136 138 189 186
29 204 226 385 262 159 87 69 82 147 134 193 175
30 179   432 248 195 113 74 62 122 152 187 182
31 163   478   185   65 54   147   268