11416100 BOWMAN-SPAULDING CANAL AT JORDAN CREEK SIPHON VENTURI, NEAR EMIGRANT GAP, CA
LOCATION.-Lat 39°20'32", long 120°38'26", in SW 1/4 NW 1/4 sec.16, T.17 N., R.12 E., Nevada County,
Hydrologic Unit 18020125, at outlet of Jordan Creek Siphon, 0.6 mi downstream from Fuller Lake, and 3.5 mi
northeast of Emigrant Gap.
PERIOD OF RECORD.-October 1964 to current year.
GAGE.-Water-stage recorder and Venturi section. Elevation of gage is 5,340 ft above sea level, from topographic
map.
REMARKS.-Records show water diverted from Bowman Lake (station 11415500) plus numerous small tributaries before
it enters Lake Spaulding (station 11414140). Most of the water at this gage flows downstream through Spaulding
No. 3 Powerplant (station 11416200). See schematic diagrams of Yuba and Bear River Basins.
COOPERATION.-Records were collected by Pacific Gas & Electric Co., under general supervision of the U.S.
Geological Survey, in connection with a Federal Energy Regulatory Commission project.
EXTREMES FOR PERIOD OF RECORD.-Maximum daily discharge, 335 ft3/s, Dec. 25, 1983; no flow at times in
most years.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 298 298 248 223 234 302 292 306 288 306 296 301
2 298 293 230 222 231 311 286 319 312 309 299 301
3 298 294 261 221 230 316 292 318 317 309 299 301
4 298 290 256 220 230 305 288 297 306 307 305 304
5 296 295 232 219 229 277 293 296 290 306 307 307
6 302 305 229 218 220 261 296 305 283 305 300 303
7 302 306 229 176 218 252 303 315 288 303 299 302
8 301 269 228 83 254 249 307 306 302 301 298 300
9 305 272 217 99 296 255 308 285 303 296 299 295
10 306 282 213 99 247 253 305 278 301 245 299 295
11 306 283 216 91 262 241 302 296 304 57 297 291
12 304 282 228 153 263 238 302 307 310 .00 296 289
13 304 281 229 239 256 236 299 317 312 .00 295 268
14 304 271 229 230 250 236 309 309 313 .00 294 246
15 305 270 231 235 243 235 319 292 316 .00 293 253
16 308 279 235 256 243 235 318 280 313 .00 289 188
17 307 283 239 263 274 236 309 282 312 .00 296 262
18 308 284 237 308 285 239 309 301 306 .00 296 284
19 308 262 235 286 278 243 314 312 299 .00 295 287
20 308 211 235 309 260 246 320 319 292 .00 297 287
21 261 205 231 234 257 243 308 319 289 .00 300 289
22 267 215 230 217 248 239 289 318 299 .00 299 289
23 300 223 225 273 241 238 277 320 302 .00 299 289
24 307 242 220 289 237 238 297 321 302 .00 300 289
25 307 218 222 271 241 228 307 320 301 .00 300 287
26 312 206 218 262 237 270 320 319 299 17 300 286
27 309 209 216 251 235 301 302 317 299 119 300 284
28 303 212 221 246 244 307 287 313 299 244 300 276
29 300 212 225 240 --- 306 272 308 299 284 300 286
30 298 256 224 238 --- 307 285 295 300 294 300 291
31 297 --- 224 236 --- 306 --- 285 --- 298 301 ---
TOTAL 9327 7808 7113 6907 6943 8149 9015 9475 9056 4300.00 9248 8530
MEAN 301 260 229 223 248 263 300 306 302 139 298 284
MAX 312 306 261 309 296 316 320 321 317 309 307 307
MIN 261 205 213 83 218 228 272 278 283 .00 289 188
AC-FT 18500 15490 14110 13700 13770 16160 17880 18790 17960 8530 18340 16920
a 19130 16000 14600 13860 14240 15850 18130 18840 18170 8010 18610 16190
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1965 - 1999, BY WATER YEAR (WY)
MEAN 194 201 202 198 188 212 224 235 236 210 253 260
MAX 306 308 312 313 311 311 311 319 315 305 316 311
(WY) 1983 1984 1984 1984 1995 1983 1980 1983 1983 1983 1993 1983
MIN 29.5 .000 41.9 37.8 21.4 26.3 19.3 33.9 .000 45.6 40.2 143
(WY) 1973 1965 1978 1977 1991 1977 1977 1965 1965 1991 1988 1977
SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1965 - 1999
ANNUAL TOTAL 101929 95871.00
ANNUAL MEAN 279 263 218
HIGHEST ANNUAL MEAN 304 1983
LOWEST ANNUAL MEAN 77.9 1977
HIGHEST DAILY MEAN 320 May 2 321 May 24 335 Dec 25
1983
LOWEST DAILY MEAN 193 Jan 18 .00 Jul 12 .00 Oct 29
1964
ANNUAL SEVEN-DAY MINIMUM 217 Nov 21 .00 Jul 12 .00 Oct 29
1964
ANNUAL RUNOFF (AC-FT) 202200 190200 157800
ANNAUL DISCHARGE (AC-FT) a 202000 191600
10 PERCENT EXCEEDS 308 309 306
50 PERCENT EXCEEDS 294 289 255
90 PERCENT EXCEEDS 227 218 65
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