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USGS Daily Statistics for Texas

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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 08171400 San Marcos Rv nr Martindale, TX


Caldwell County, Texas
Hydrologic Unit Code 12100203
Latitude  29°49'56.23", Longitude  97°50'32.58" NAD83
Drainage area 547  square miles
Gage datum 486 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 2010-10-01 -> 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
1 223 234 215 217 249 509 259 203 202 191 1,180 224
2 252 230 217 229 235 506 250 204 198 185 408 221
3 323 257 214 232 226 528 248 203 202 185 344 240
4 278 238 214 212 516 436 248 204 209 180 314 230
5 260 238 217 209 304 408 245 203 206 180 304 236
6 250 228 212 212 253 393 240 200 200 173 275 229
7 244 224 210 229 238 362 235 208 202 171 266 255
8 242 220 210 210 280 343 231 200 197 170 266 269
9 241 219 227 202 677 329 239 198 232 172 263 237
10 232 219 230 199 348 316 232 196 255 167 260 231
11 230 219 227 196 372 312 233 195 210 168 251 227
12 228 218 230 195 338 304 228 194 200 167 244 224
13 225 215 225 223 375 293 223 190 198 180 237 231
14 222 219 224 198 326 301 224 191 200 743 232 240
15 220 219 219 197 313 301 226 194 204 300 234 233
16 221 214 216 197 324 296 226 212 204 241 231 229
17 231 215 215 198 496 321 222 224 202 224 232 225
18 256 220 211 267 603 302 223 209 208 210 231 221
19 258 218 215 237 464 285 221 202 200 203 228 236
20 246 253 254 252 535 284 221 201 199 201 224 221
21 241 263 248 261 372 276 216 210 172 200 221 216
22 253 237 237 246 343 287 215 209 180 196 225 217
23 240 238 233 241 330 280 219 207 189 201 223 212
24 245 229 227 241 1,260 274 220 202 178 220 220 211
25 411 222 223 234 1,090 268 219 198 178 232 220 209
26 269 218 219 225 1,080 262 217 219 299 240 224 207
27 243 217 218 227 645 267 224 266 262 219 219 244
28 239 216 311 222 577 264 215 250 234 206 219 263
29 238 216 284 229 593 311 212 212 271 198 226 235
30 234   235 225 545 266 206 211 208 985 230 226
31 233   225   535   205 209   2,100   229