RED RIVER OF THE NORTH BASIN

05056260 LAKE IRVINE NEAR CHURCHS FERRY, ND

LOCATION.--Lat 48×16'57", long 99×10'25", in SE14SW14SW14 sec.32, T.156 N., R.66 W., Ramsey County, Hydrologic Unit 09020201, at south end of lake 114 mi northwest of Churchs Ferry.

DRAINAGE AREA.--2,120 mi2, approximately, of which about 500 mi2 is probably noncontributing.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1966-87, 1993 to current year.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004

Date	Time	Depth to bottom of samplng intrval meters (82048)	Depth to top of samplng intrval meters (82047)	pH, water, unfltrd lab, std units (00403)	Specif. conduc- tance, wat unf lab, uS/cm 25 degC (90095)	Hard- ness, water, mg/L as CaCO3 (00900)	Calcium water, fltrd, mg/L (00915)	Magnes- ium, water, fltrd, mg/L (00925)	Potas- sium, water, fltrd, mg/L (00935)	Sodium adsorp- tion ratio (00931)	Sodium, water, fltrd, mg/L (00930)	Sodium, percent (00932)	ANC, wat unf fixed end pt, lab, mg/L as CaCO3 (90410)
OCT
01...	1300	2.6	0.00	8.3	1,430	550	103	71.6	22.4	2	110	29	361
MAR
03...	1315	3.0	0.80	8.1	1,820	750	135	99.9	29.5	3	160	31	461
MAY
10...	1400	3.3	0.00	8.8	1,070	400	75.3	52.5	17.6	2	79.9	29	273
AUG
02...	1335	2.9	0.00	8.5	1,070	410	76.8	53.6	18.2	2	75.6	27	269

WATER-QUALITY DATA, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004

Date	Chlor- ide, water, fltrd, mg/L (00940)	Fluor- ide, water, fltrd, mg/L (00950)	Silica, water, fltrd, mg/L (00955)	Sulfate water, fltrd, mg/L (00945)	Residue water, fltrd, sum of consti- tuents mg/L (70301)	Ammonia + org-N, water, unfltrd mg/L as N (00625)	Ammonia water, fltrd, mg/L as N (00608)	Nitrate water, fltrd, mg/L as N (00618)	Nitrite + nitrate water fltrd, mg/L as N (00631)	Nitrite water, fltrd, mg/L as N (00613)	Organic nitro- gen, water, unfltrd mg/L (00605)	Ortho- phos- phate, water, fltrd, mg/L as P (00671)	Phos- phorus, water, unfltrd mg/L (00665)
OCT
01...	47.8	0.20	38.8	413	986	2.9	<0.04	--	<0.06	E.005n	--	0.31	0.51
MAR
03...	63.7	0.24	35.3	526	1,290	2.9	0.29	0.20	0.39	0.195	2.6	0.51	0.61
MAY
10...	33.0	0.14	13.1	275	698	1.7	<0.04	--	<0.06	<0.008	--	0.22	0.29
AUG
02...	31.8	0.16	13.4	276	695	2.2	E.03n	--	E.05n	E.007n	--	0.20	0.32

WATER-QUALITY DATA, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004

Date	Total nitro- gen, water, unfltrd mg/L (00600)	Chloro- phyll a phyto- plank- ton, fluoro, ug/L (70953)	Chloro- phyll b phyto- plank- ton, fluoro, ug/L (70954)	Arsenic water, fltrd, ug/L (01000)	Iron, water, fltrd, ug/L (01046)	Lead, water, fltrd, ug/L (01049)	Lithium water, fltrd, ug/L (01130)	Mangan- ese, water, fltrd, ug/L (01056)	Mercury water, fltrd, ug/L (71890)	Molyb- denum, water, fltrd, ug/L (01060)	Selen- ium, water, fltrd, ug/L (01145)	Stront- ium, water, fltrd, ug/L (01080)
OCT
01...	--	26.5d	1.2	12.1	10	<1	90	<10	<0.20	3	3	430
MAR
03...	3.3	E.1d	<0.1d	15.3	30	<1	120	850	<0.20	3	4	550
MAY
10...	--	7.8d	0.5d	8.6	20	<1	60	20	<0.20	2	1	300
AUG
02...	--	E16.2d	<0.1d	8.2	20	1	70	240	<0.20	2	2	310
Remark codes used in this table: < -- Less than E -- Estimated value
Value qualifier codes used in this table: d -- Diluted sample: method hi range exceeded n -- Below the LRL and above the LT-MDL

WATER-QUALITY DATA, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004

Date	Time	Depth of lake, maximum meters (85310)	Ice thick- ness, feet (82130)	Sam- pling depth, meters (00098)	Trans- parency Secchi disc, inches (00077)	Wind direc- tion, clkwise from north, degrees (00036)	Wind speed, mph (00035)	Baro- metric pres- sure, mm Hg (00025)	Dis- solved oxygen, mg/L (00300)	Dis- solved oxygen, percent of sat- uration (00301)	pH, water, unfltrd field, std units (00400)	Specif. conduc- tance, wat unf uS/cm 25 degC (00095)	Temper- ature, air, deg C (00020)
OCT
01...	1250	2.6	--	0.00	13.2	--	<5.0	745	12.1	108	8.7	1,430	13.0
01...	1251	--	--	0.50	--	--	--	--	11.4	--	8.7	1,440	--
01...	1252	--	--	1.0	--	--	--	--	11.0	--	8.7	1,450	--
01...	1253	--	--	1.5	--	--	--	--	10.7	--	8.7	1,450	--
01...	1254	--	--	2.0	--	--	--	--	10.7	--	8.7	1,450	--
01...	1255	--	--	2.5	--	--	--	--	10.6	--	8.7	1,450	--
01...	1256	--	--	2.6	--	--	--	--	10.6	--	8.7	1,450	--
MAR
03...	1310	3.0	2.40	0.80	40.8	60	<5.0	740	2.7	19	7.7	1,860	-4.0
03...	1311	--	--	1.3	--	--	--	--	2.7	--	7.7	1,870	--
03...	1312	--	--	1.8	--	--	--	--	2.6	--	7.7	1,850	--
03...	1313	--	--	2.3	--	--	--	--	2.4	--	7.7	1,870	--
03...	1314	--	--	3.0	--	--	--	--	1.0	--	7.7	1,890	--
MAY
10...	1355	3.3	--	0.00	30.0	348	<5.0	742	10.1	97	8.8	1,070	12.5
10...	1356	--	--	1.0	--	--	--	--	10.0	--	8.8	1,070	--
10...	1357	--	--	2.0	--	--	--	--	10.0	--	8.7	1,070	--
10...	1358	--	--	3.3	--	--	--	--	9.7	--	8.7	1,070	--
AUG
02...	1328	2.9	--	0.00	36.0	35	<5.0	737	12.4	147	8.4	1,050	29.0
02...	1329	--	--	1.0	--	--	--	--	8.7	--	8.3	1,070	--
02...	1330	--	--	2.0	--	--	--	--	7.9	--	8.3	1,070	--
02...	1331	--	--	2.9	--	--	--	--	5.7	--	8.2	1,070	--

WATER-QUALITY DATA, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004

Date	Temper- ature, water, deg C (00010)
OCT
01...	9.3
01...	8.0
01...	7.5
01...	7.5
01...	7.5
01...	7.4
01...	7.5
MAR
03...	0.5
03...	1.1
03...	1.9
03...	2.6
03...	3.7
MAY
10...	12.6
10...	12.6
10...	12.4
10...	12.3
AUG
02...	21.9
02...	20.3
02...	20.2
02...	20.1
Remark codes used in this table: < -- Less than

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