U.S. Department of the Interior

U.S. Geological Survey

Prepared in cooperation with

U.S. Environmental Protection Agency

Concentrations and Loads of Cadmium, Lea

and Zinc Measured on the Ascending and 

Descending Limbs of the 1999 Snowmelt-Run

Hydrographs for Nine Water-Quality Stations, 

Coeur d’Alene River Basin, Idaho

Open-File Report 00–310
Concentrations and Loads of Cadmium, Lea

and Zinc Measured on the Ascending and 

Descending Limbs of the 1999 Snowmelt-Run

Hydrographs for Nine Water-Quality Stations, 

Coeur d’Alene River Basin, Idaho

By Paul F. Woods

Open-File Report 00–310

Prepared in cooperation with

U.S. Environmental Protection Agency

Boise, Idaho

2001
U.S. DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY

Charles G. Groat, Director 

Any use of firm, trade, and brand names in this report is for

identification purposes only and does not constitute 

endorsement by the U.S. Government.

Additional information can be obtained from: Copies of this report can be purchased from

District Chief U.S. Geological Survey

U.S. Geological Survey Information Services

230 Collins Road Box 25286

Boise, ID 83702-4520 Federal Center

http://idaho.usgs.gov Denver, CO 80225

e-mail: infoservices@usgs.gov

Copies of this report are available online in PDF 

format, which can be viewed using Adobe Acrob

Reader, at URL: 

http://idaho.usgs.gov/public/reports.html 

GALE A. NORTON, Secretary
CONTENTS

Abstract .............................................................................................................................................................................

Introduction .......................................................................................................................................................................

Approach ...........................................................................................................................................................................

Magnitude of concentrations and loads among stations....................................................................................................

Variation in concentrations and loads over station hydrographs ......................................................................................

Hysteresis effects on concentrations and loads .................................................................................................................

References cited ................................................................................................................................................................

Appendix A. Selected water-quality analyses from the U.S. Geological Survey National Water-Quality Laboratory fo

nine water-quality stations sampled during the 1999 snowmelt runoff, Coeur d’Alene River Basin, Idaho ............

FIGURES

1. Map showing locations of nine water-quality stations monitored over hydrographs of spring 1999 snowmelt 

runoff within Coeur d’Alene River Basin, Idaho ..................................................................................................

2–9. Graphs showing:

2. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc at South For

Coeur d’Alene River above Deadman Gulch near Mullan, Idaho .................................................................

3. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc at Canyon 

Creek above mouth at Wallace, Idaho ...........................................................................................................

4. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc at Ninemile 

Creek above mouth at Wallace, Idaho ...........................................................................................................

5. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc at South For

Coeur d’Alene River at Silverton, Idaho........................................................................................................

6. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc at South For

Coeur d’Alene River at Elizabeth Park near Kellogg, Idaho .........................................................................

7. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc at Pine Creek 

below Amy Gulch near Pinehurst, Idaho .......................................................................................................

8. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc at South For

Coeur d’Alene River near Pinehurst, Idaho ...................................................................................................

9. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc at North For

Coeur d’Alene River at Enaville, Idaho.........................................................................................................

TABLES

1. Names and identification numbers of nine U.S. Geological Survey water-quality stations monitored during the 

1999 snowmelt runoff, Coeur d’Alene River Basin, Idaho ...................................................................................

2. Concentrations and instantaneous loads of cadmium, lead, and zinc measured during 1999 snowmelt runoff at 

nine water-quality stations on the North and South Forks of the Coeur d’Alene River, Idaho.............................

iii
CONVERSION FACTORS AND OTHER ABBREVIATED UNITS

Multiply By To obtain

cubic foot per second (ft3/s) 0.02832 cubic meter per second

mile (mi) 1.609 kilometer

pound per day (lb/d) 0.4536 kilogram per day

square mile (mi2) 2.590 square kilometer

Temperature in degrees Celsius (°C) can be converted to degrees Fahrenheit (°F) as follows:

°F=(1.8) (°C)+32

Other abbreviated units:

AC-FT acre-foot

DEG C degrees Celsius

μg/L, UG/L microgram per liter

US/CM microsiemens per centimeter

MG/L milligram per liter

ML, mL milliliter

T/DAY ton per day

Conversion Factors and Other Abbreviated Units

iv
1

Abstract

The Remedial Investigation/Feasibility Study 

conducted by the U.S. Environmental Protection 

Agency within the Spokane River Basin of northern Idaho and eastern Washington included extensive data-collection activities to determine the 

nature and extent of trace-element contamination 

within the basin. The U.S. Geological Survey 

designed and implemented synoptic sampling of a 

high-flow runoff event at selected water-quality 

stations during the 1999 water year. The objective 

was to quantify spatial and temporal differences in 

constituent concentrations and loads over the 

ascending and descending limbs of a hydrograph 

depicting a high-flow runoff event. Discharge and 

water-quality data were collected during spring 

1999 snowmelt runoff (May through early June) at 

nine water-quality stations, one on the North Fork 

Coeur d’Alene River and eight on the South Fork 

Coeur d’Alene River. The nine stations were sampled for whole-water recoverable and dissolved 

concentrations and loads of cadmium, lead, and 

zinc.

The concentrations and loads sampled during 

the 1999 snowmelt-runoff event represented nearnormal conditions, not flood conditions, in that the 

recurrence interval for discharge near the hydrograph peak was about 2 years. The general trend 

among the nine stations was an inverse relation 

between discharge and dissolved concentrations of 

cadmium, lead, and zinc, and a direct relation 

between discharge and whole-water recoverable 

concentrations of these constituents. The smallest 

loads of dissolved and whole-water recover

cadmium, lead, and zinc were measured at 

Fork Coeur d’Alene River above Deadman 

constituent concentrations at this site were s

the smallest among those sampled, and disc

was also relatively small. The largest loads 

solved and whole-water recoverable cadmiu

lead, and zinc were measured at South Fork 

d’Alene River at Pinehurst; constituent con

tions at this site were large and discharge w

second-largest of all the discharge measurem

Hysteresis effects on concentrations an

loads over the ascending and descending lim

the snowmelt-runoff hydrograph were quite 

ent, especially for whole-water recoverable 

stituents. Hysteresis is present when a prop

such as constituent concentration or load, h

different values for a given discharge over t

ascending and descending limbs of a hydro

During this study, loads of whole-water rec

able constituents on the ascending limb wer

between 1.5 and 3.6 times larger than those 

sured on the descending limb at nearly equa

charge. In contrast, dissolved constituents s

minimal hysteresis effects. 

INTRODUCTION

Mining and ore-processing activities cond

over the past 100 years in the South Fork Coeur d

River Basin have produced extensive deposits o

element-contaminated sediments throughout th

Fork Coeur d’Alene River valley and its tributar

channel and flood plain of the main stem Coeur d

Concentrations and Loads of Cadmium, Lead

and Zinc Measured on the Ascending and 

Descending Limbs of the 1999 Snowmelt-Run

Hydrographs for Nine Water-Quality Stations, 

Coeur d’Alene River Basin, Idaho

By Paul F. Woods

ABSTRACT
2

River, and the lakebed of Coeur d’Alene Lake (about 

15 mi west of study area boundary, fig. 1, back of report). Snowmelt runoff and occasional floods continue 

to transport and redistribute trace-element-contaminated sediments throughout the 6,680-mi2 Spokane 

River Basin of northern Idaho and eastern Washington. 

The U.S. Environmental Protection Agency 

(EPA) recently initiated a Remedial Investigation/Feasibility Study (RI/FS) of the Spokane River Basin 

under the authority of the Comprehensive Environmental Response, Compensation, and Liability Act of 

1980 (CERCLA), which requires EPA to evaluate contaminant release, fate, and transport. The Remedial 

Investigation phase involves data collection to characterize site conditions, development of conceptual models, determination of the nature and extent of trace-element contamination, and risk assessment for human 

health and the environment. The development and evaluation of remedial action alternatives is the focus of the 

Feasibility Study phase. In March 1998, the EPA asked 

the U.S. Geological Survey (USGS) to identify hydrologic and water-quality studies the USGS might perform in support of the RI/FS of the Spokane River 

Basin. The study described in this report was conducted 

by the USGS as Task 1 (synoptic sampling of a highflow event on the Coeur d’Alene River system) under 

Interagency Agreement DW14957278–01–0 with EPA.

The purpose of this report is to quantify spatial 

and temporal differences in constituent concentrations 

and loads over the ascending and descending limbs of 

snowmelt-runoff hydrographs for selected stations in 

the Coeur d’Alene River Basin. Discharge and waterquality data were collected synoptically during the 

spring 1999 snowmelt-runoff event (May through early 

June) at nine water-quality stations, one on the North 

Fork Coeur d’Alene River (NFCDR) and eight on the 

South Fork Coeur d’Alene River (SFCDR). Synoptic 

collection of data involved the simultaneous deployment of multiple sampling crews among the nine stations in order to measure and sample using an identical 

sampling design. 

The results of this synoptic sampling can be used 

to evaluate the effects of hysteresis on constituent concentrations and loads over the ascending and descending limbs of hydrographs. Hysteresis is present when a 

property, such as constituent concentration or load, has 

different values for a given discharge over the ascending and descending limbs of a hydrograph. Hysteresis 

is largely a result of the initial transport of stored materials within the stream channel or the initial flush of 

mobile materials from riparian or terrestrial sou

(Chang, 1998). The relative magnitude of hyste

effects can be used to evaluate historical water-

data for potential bias in constituent concentrati

loads. 

APPROACH

Discharge measurements and water-qualit

ples were collected at the nine USGS water-qua

tions listed in table 1 (back of report). The loca

the stations are illustrated in figure 1 in relation 

number or letter preceding each USGS station n

Discharge measurements were made usin

dardized USGS methods for collection of stream

data, computation of discharge, and quality assu

procedures, which are thoroughly described in 

USGS Techniques of Water-Resources Investig

Reports (Buchanan and Somers, 1968, 1969; R

1968; Carter and Davidian, 1968; Kennedy, 1983

The field sampling plan was to measure dischar

the start of the snowmelt-runoff hydrograph, on 

ascending limb, near the peak, and on the desce

limb. Discharge measurements were made betw

May 5 and June 2; 42 measurements were made 

the nine stations.

Water-quality samples were collected each 

discharge measurement was made. Water tempe

pH, and specific conductance were measured on

each time samples were collected. Water-qualit

ples were collected with nonmetallic samplers a

using cross-sectional, depth-integrated samplin

dures described by Edwards and Glysson (1988

individual samples from the cross-sectional, dep

integrated sampling were composited in a churn 

and subsamples were withdrawn for laboratory 

ses. Samples destined for whole-water recovera

(WWR) analyses were withdrawn initially; sam

dissolved analyses then were withdrawn via a p

tic pump and nonmetallic filtration apparatus w

ter pore size of 0.45 micrometer (Gelman capsu

ters). Each capsule filter had been prerinsed wit

mL of deionized water. Trace-element samples 

preserved with 2 mL of Ultrex nitric acid. Wate

ity sample collection and field processing were 

ducted using “clean” protocols that ensure nonc

nation at the parts-per-billion level, as described 

Horowitz and others (1994). The samples were s

in plastic coolers that were securely taped, cust

sealed, and logged in on an enclosed chain-of-c
3

form. The chain-of-custody was quite short—the 

field personnel shipped the samples directly to the 

USGS National Water-Quality Laboratory in Denver, 

Colorado. 

The water-quality samples were analyzed for 

WWR and dissolved concentrations of cadmium, lead, 

and zinc, as well as hardness, by using low-level detection limit methods described by Fishman and Friedman 

(1989) and quality assurance/quality control procedures 

described by Pritt and Raese (1995). A tabulation of 

analytical results is listed in appendix A (back of 

report).

The water-quality data were combined with discharge data to compute instantaneous constituent loads 

on the hydrograph for each station. Instantaneous 

loads, in pounds per day, were computed by multiplying the following four variables: instantaneous discharge, in cubic feet per second; constituent concentration, in milligrams per liter; a conversion factor of 

0.0027 to convert flow and concentration units; and 

a conversion factor of 2,000 to convert tons to pounds. 

To facilitate discussion of the data, each station’s sample points were plotted on a hydrograph, and concentration and load values were linked to each sample 

point.

MAGNITUDE OF CONCENTRATIONS AND 

LOADS AMONG STATIONS

The results of discharge measurements and 

water-quality sampling at the nine stations are summarized in table 2 (back of report). Dissolved and WWR 

concentrations, in μg/L, of cadmium among the nine 

stations ranged, respectively, from 0.02 (Deadman 

Gulch and Enaville) to 16.2 (Ninemile Creek) and from 

0.04 (Deadman Gulch and Enaville) to 16.8 (Ninemile 

Creek). Dissolved and WWR lead concentrations, in 

μg/L, ranged, respectively, from 0.06 (Enaville) to 26.3 

(Canyon Creek) and from 0.67 (Enaville) to 2,000 

(Canyon Creek). Dissolved and WWR concentrations, 

in μg/L, of zinc ranged, respectively, from 3.49 (Deadman Gulch) to 2,690 (Ninemile Creek) and from 4.36 

(Enaville) to 2,580 (Ninemile Creek). The general 

trend among the nine stations was an inverse relation 

between discharge and dissolved concentrations of cadmium, lead, and zinc; the smallest concentrations 

tended to be associated with the largest discharges. In 

contrast, WWR concentrations of cadmium, lead, and 

zinc were directly related to discharge; the large

centrations were associated with the largest disc

Among the nine stations, dissolved and W

loads, in lb/d, of cadmium ranged, respectively, 

0.01 (Deadman Gulch) to 36.2 (Pinehurst) and 

0.02 (Deadman Gulch) to 125 (Pinehurst). Diss

and WWR lead loads, in lb/d, ranged, respectiv

from 0.15 (Deadman Gulch) to 82.8 (Pinehurst) 

from 1.09 (Deadman Gulch) to 17,500 (Pinehur

Dissolved and WWR loads, in lb/d, of zinc rang

respectively, from 3.08 (Deadman Gulch) to 5,1

(Pinehurst) and from 4.29 (Deadman Gulch) to 

(Pinehurst). The smallest dissolved and WWR l

cadmium, lead, and zinc usually were measured 

South Fork Coeur d’Alene River above Deadm

Gulch, corresponding to the relatively small dis

at this site. The largest dissolved and WWR loa

cadmium, lead, and zinc usually were measured 

South Fork Coeur d’Alene River near Pinehurst

sponding to the second-largest discharge.

Using the data in table 2, the magnitude o

contributed by each station can be evaluated for 

selected time intervals. The samples collected i

May, prior to the start of snowmelt runoff, repre

relatively stable discharge conditions among th

stations. The ranking of loads, from low to high

follows for WWR cadmium and zinc: Deadman 

Pine Creek, Enaville, Ninemile Creek, Canyon 

Silverton, Osburn, Elizabeth Park, and Pinehurs

pattern of ranking for lead loads was similar to 

for cadmium and zinc except that Ninemile Cre

ranked third and Enaville fourth. The ranking o

near the peak of each snowmelt-runoff hydrogra

similar to those in early May. For WWR cadmiu

zinc loads, the ranking, from low to high, was a

lows: Deadman Gulch, Pine Creek, Enaville, N

Creek, Canyon Creek, Silverton, Osburn, Elizab

Park, and Pinehurst. Ranking of lead loads was 

to those for cadmium and zinc except that Eliza

Park was ranked sixth, Silverton seventh, and O

eighth.

VARIATION IN CONCENTRATIONS A

LOADS OVER STATION HYDROGRA

The effect of discharge on the load values 

apparent when the data are plotted on station hy

graphs. Figures 2 through 9 (back of report) are 

graphs showing dates of water-quality sample c
4

tion, plotted as points along the discharge curve, and 

listing the concentrations and instantaneous loads associated with each water-quality sample. Note that the 

sample points do not always plot on the hydrograph 

curve; the indicated samples are associated with instantaneous discharge measurements, whereas the 

hydrograph curve depicts mean daily discharge. 

The South Fork Coeur d’Alene River above 

Deadman Gulch was sampled five times during the 

snowmelt-runoff event (fig. 2). Loads of WWR and dissolved cadmium, lead, and zinc on the ascending and 

descending limbs of the hydrograph were larger than 

those measured on the prerunoff sample date of May 5. 

The largest loads for the three trace elements were 

measured near the hydrograph peak on May 25. The 

load of WWR lead increased by the largest percentage, 

from 1.09 lb/d on May 5 to 24.9 lb/d on May 25, as a 

result of a 440-percent increase in concentration and a 

320-percent increase in discharge. 

Canyon Creek above mouth was sampled four 

times (fig. 3). Loads of WWR and dissolved cadmium, 

lead, and zinc on the ascending and descending limbs 

of the hydrograph were larger than those measured on 

the prerunoff sample date of May 5. The largest loads 

for the three trace elements were measured near the 

hydrograph peak on May 24. The load of WWR lead 

increased by the largest percentage, from 24.9 lb/d on 

May 5 to 4,140 lb/d on May 24, as a result of a 3,500-

percent increase in concentration and a 360-percent 

increase in discharge. WWR loads on the descending 

limb decreased from the peak because of decreases in 

discharge coupled with decreases in constituent concentrations. The rate of decrease for dissolved loads on 

the descending limb was less than that for WWR loads 

because concentrations either increased or varied little 

on the descending limb.

Ninemile Creek above mouth was sampled five 

times (fig. 4). Loads of WWR and dissolved lead on the 

ascending and descending limbs of the hydrograph 

were larger than those measured on the prerunoff sample date of May 5. Although WWR concentrations of 

lead increased substantially over the hydrograph, concentrations of dissolved lead changed very little. Loads 

of WWR and dissolved cadmium and zinc measured on 

only the two sample dates near the hydrograph peak 

were larger than those measured on the other three 

sample dates. The largest loads for the three trace elements were measured near the hydrograph peak on 

May 26. The load of WWR lead increased by the largest percentage, from 9.67 lb/d on May 5 to 534 lb/d on 

May 26, as a result of a 1,400-percent increase 

centration and a 260-percent increase in dischar

WWR loads on the descending limb decreased b

of decreases in discharge coupled with decrease

constituent concentrations. Decreases in discha

were more likely the cause of dissolved load de

because constituent concentrations either increa

varied little on the descending limb.

The South Fork Coeur d’Alene River at Si

was sampled five times (fig. 5). Loads of WWR 

dissolved cadmium, lead, and zinc on the ascen

and descending limbs of the hydrograph were l

than those measured on the prerunoff sample da

May 5. The largest loads for the three trace elem

were measured near the hydrograph peak on M

The load of WWR lead increased by the largest 

centage, from 44.2 lb/d on May 5 to 4,570 lb/d 

26, as a result of a 3,050-percent increase in con

tion and a 230-percent increase in discharge. W

loads on the descending limb decreased becaus

decreases in discharge coupled with decreases i

stituent concentrations. Decreases in discharge 

more likely the cause of dissolved load decreas

because constituent concentrations either increa

varied little on the descending limb. 

The hydrograph for South Fork Coeur d’A

River near Osburn is not included because that 

did not record continuous discharge; however, i

hydrograph would have been similar to that plo

South Fork Coeur d’Alene River at Silverton (fi

The Silverton and Osburn stations were sampled 

same dates; discharge was about 15 percent larg

Osburn (table 1). Loads of WWR and dissolved 

mium, lead, and zinc on the ascending and desc

limbs of the hydrograph were larger than those 

sured on the prerunoff sample date of May 5. T

est loads for the three trace elements were meas

near the hydrograph peak on May 26. The load 

WWR lead increased by the largest percentage, 

47.1 lb/d on May 5 to 5,000 lb/d on May 26, as 

of a 2,950-percent increase in concentration and 

percent increase in discharge. WWR loads on th

descending limb decreased from the peak becau

decreases in discharge coupled with decreases i

stituent concentrations. Decreases in discharge 

more likely the cause of dissolved load decreas

cause constituent concentrations either increase

varied little on the descending limb. 

The South Fork Coeur d’Alene River at El

Park was sampled four times (fig. 6). Loads of W
5

and dissolved cadmium, lead, and zinc on the ascending and descending limbs of the hydrograph were 

larger than those measured on the prerunoff sample 

date of May 6, except that the June 1 load of dissolved 

zinc was less than that of May 6. The largest loads for 

the three trace elements were measured near the 

hydrograph peak on May 25. The load of WWR lead 

increased by the largest percentage, from 57.9 lb/d on 

May 6 to 4,460 lb/d on May 25, as a result of a 1,980-

percent increase in concentration and a 270-percent 

increase in discharge. WWR loads on the descending 

limb decreased because of decreases in discharge coupled with decreases in constituent concentrations. 

Decreases in discharge were more likely the cause of 

the dissolved load decreases because constituent concentrations either increased or varied little on the 

descending limb. 

Pine Creek below Amy Gulch was sampled five 

times (fig. 7). Loads of WWR lead on the ascending 

and descending limbs of the hydrograph were larger 

than those measured on the prerunoff sample date of 

May 6; cadmium and zinc loads were similar, except 

that the June 1 loads were less than those of May 6. 

The largest loads for the three trace elements were 

measured near the hydrograph peak on May 25. The 

load of WWR lead increased by the largest percentage, 

from 1.5 lb/d on May 6 to 226 lb/d on May 25, as a 

result of a 3,250-percent increase in concentration and 

a 270-percent increase in discharge. WWR loads on the 

descending limb decreased because of decreases in discharge coupled with decreases in constituent concentrations. Decreases in discharge were more likely the 

cause of dissolved load decreases because constituent 

concentrations either increased or varied little on the 

descending limb. 

The South Fork Coeur d’Alene River at Pinehurst 

was sampled four times (fig. 8). Loads of WWR and 

dissolved cadmium, lead, and zinc on the ascending 

and descending limbs of the hydrograph were larger 

than those measured on the prerunoff sample date of 

May 6. The largest loads for the three trace elements 

were measured near the hydrograph peak on May 25. 

The load of WWR lead increased by the largest percentage, from 271 lb/d on May 6 to 17,500 lb/d on May 

25, as a result of a 1,650-percent increase in concentration and a 270-percent increase in discharge. WWR 

loads on the descending limb decreased because of 

decreases in discharge coupled with decreases in constituent concentrations. Decreases in discharge were 

more likely the cause of dissolved load decreases because constituent concentrations either increase

varied little on the descending limb.

The North Fork Coeur d’Alene River at E

was sampled five times (fig. 9). Loads of WWR 

mium, lead, and zinc on the ascending and desc

limbs of the hydrograph were larger than those 

sured on the prerunoff sample date of May 6, ex

that WWR cadmium and zinc loads on June 2 w

than those on May 6. The largest loads for WW

dissolved cadmium, lead, and zinc were measur

the hydrograph peak on May 25. The load of W

lead increased by the largest percentage, from 2

on May 6 to 674 lb/d on May 25, as a result of 

percent increase in concentration and a 125-per

increase in discharge. WWR loads on the desce

limb decreased because of decreases in discharg

pled with decreases in constituent concentration

Decreases in discharge were more likely the cau

dissolved load decreases because constituent co

trations either increased or varied little on the d

ing limb. 

HYSTERESIS EFFECTS ON 

CONCENTRATIONS AND LOADS

Hysteresis effects were most apparent at t

the stations (Ninemile Creek and South Fork C

d’Alene River at Silverton and near Osburn) be

concentrations and loads on the ascending and 

scending limbs of the hydrographs were measu

when discharge was nearly equal. Hysteresis ef

were not as apparent at the other six stations be

discharge on the ascending and descending hydr

limbs was not similar. However, hysteresis effec

likely to have been present at those stations beca

hydrologic processes among the nine stations w

similar. For Ninemile Creek, the effect of hyste

readily apparent for the samples on May 23 on 

ascending limb and May 31 on the descending 

(fig. 4). Although instantaneous discharge was n

equal (61 and 55 ft3/s, respectively), loads of W

constituents were 1.5 to 2.4 times larger on the 

ing limb because of differences in constituent c

trations measured on the two sample dates. Loa

dissolved constituents on the ascending limb w

to 1.4 times larger than those on the descending 

The effect of hysteresis at South Fork Coeur d’A

River at Silverton is apparent for the samples on 

24 on the ascending limb and May 27 on the de
6

ing limb (fig. 5). Although instantaneous discharge was 

nearly equal (1,220 and 1,230 ft3/s, respectively), loads 

of WWR constituents were about 1.5 to 3.6 times larger 

on the ascending limb because of differences in constituent concentrations measured on the two sample dates. 

Loads and concentrations of dissolved constituents 

measured on these two dates were nearly equal. At 

South Fork Coeur d’Alene River near Osburn, the 

effect of hysteresis is apparent for the samples on May 

24 on the ascending limb and May 27 on the descending limb (table 1). Although instantaneous discharge 

was nearly equal (1,390 and 1,370 ft3/s, respectively), 

loads of WWR constituents were 1.5 to 2.4 times larger 

on the ascending limb because of differences in constituent concentrations measured on the two sample dates. 

Loads and concentrations of dissolved cadmium and 

zinc were nearly equal, whereas the load of dissolved 

lead was 1.3 times larger on the ascending limb.

In that hysteresis is largely a result of the initial 

transport of stored materials within the stream channel 

and (or) the initial flush of mobile materials from riparian or terrestrial sources (Chang, 1998), the magnitude 

of the hysteresis effect can be affected by antecedent 

conditions, as well as by the magnitude of the discharge 

event generating hysteresis. As an example, a lack of 

channel-flushing discharges over the summer and 

autumn months may allow the accrual of stored sediments, which could be mobilized by the first significant 

discharge event and thereby yield a large hysteresis 

effect. After this first event, the hysteresis effect in subsequent events might be muted because of a paucity of 

stored sediments within the stream channel. As the 

recurrence interval of a discharge event becomes larger, 

the potential for channel scour and input of riparian and 

flood-plain sediments increases. In the case of the 1999 

snowmelt-runoff event in the Coeur d’Alene River 

Basin, the magnitude of the hysteresis effect was likely 

muted because an antecedent storm occurred in the 

basin in April. Additionally, bankfull and overbank 

flows did not occur because the recurrence interval of 

the snowmelt-runoff event was only about 2 years. The 

recurrence interval is based on a statistical analysis of 

the long-term record at USGS station 12413000, North 

Fork Coeur d’Alene River at Enaville (Kjelstrom and 

others, 1996).

The insight on hysteresis effects gained by this 

particular study can be applied to evaluations of waterquality data for the RI/FS of the Spokane River Basin. 

Water-quality samples collected in conjunction with a 

continuous record of discharge can be evaluated as to 

potential bias on the basis of whether they were 

lected on the ascending or descending limb of t

hydrograph. Evaluations based on WWR conce

tions of sediment-associated constituents, such 

collected on the descending limb are likely to re

significant underestimation of the load carried d

the sampled hydrologic event. The partitioning 

sources along a stream reach may be inaccurate 

stream and downstream samples for determinin

stituent concentrations are collected on differen

of the hydrograph. For example, if concentration

upstream station are collected on the descendin

of the hydrograph but concentrations at the down

station are collected on the ascending limb, the i

in load downstream may be an artifact caused b

teresis. Conversely, if concentrations are collect

the ascending limb at the upstream station and o

descending limb at the downstream station, an a

reduction in load may be incorrectly surmised. T

ter case has implications for monitoring the effe

ness of remediation actions in that knowledge o

teresis effects is desirable for realistic evaluatio

changes in loads between monitoring stations up

and downstream from the remediation activities

REFERENCES CITED

Buchanan, T.J., and Somers, W.P., 1968, Stage 

surement at gaging stations: U.S. Geologi

vey Techniques of Water-Resources Inves

tions, book 3, chap. A7, 28 p.

——— 1969, Discharge measurements at gagin

tions: U.S. Geological Survey Techniques 

Water-Resources Investigations, book 3, c

A8, 65 p.

Carter, R.W., and Davidian, J., 1968, General p

dure for gaging streams: U.S. Geological 

Techniques of Water-Resources Investigat

book 3, chap. A6, 13 p.

Chang, H.H., 1998, Fluvial processes in river en

ing: Malabar, Fla., Krieger Publishing Co

Edwards, T.K., and Glysson, G.D., 1988, Field 

ods for measurement of fluvial sediment: 

Geological Survey Open-File Report 86–5

118 p.

Fishman, M.J., and Friedman, L.C., eds., 1989, 

ods for determination of inorganic substan

water and fluvial sediments: U.S. Geologi

vey Techniques of Water-Resources Inves

tions, book 5, chap. A1, 545 p.
7

Horowitz, A.J., Demas, C.R., Fitzgerald, K.K., Miller, 

T.L., and Rickert, D.A., 1994, U.S. Geological 

Survey protocol for the collection and processing 

of surface-water samples for the subsequent 

determination of inorganic constituents in filtered 

water: U.S. Geological Survey Open-File Report 

94–539, 57 p.

Kennedy, E.J., 1983, Computation of continuous 

records of streamflow: U.S. Geological Survey 

Techniques of Water-Resources Investigations, 

book 3, chap. A13, 53 p.

——— 1984, Discharge ratings at gaging stations: 

U.S. Geological Survey Techniques of WaterResources Investigations, book 3, chap. A10, 

59 p.

Kjelstrom, L.C., Stone, M.A.J., and Harenberg

1996, Statistical summaries of streamflow 

for selected gaging stations in Idaho and a

States through September 1990—Volume 

ing stations with 10 or more years of reco

Geological Survey Water-Resources Inve

tions Report 94–4069, 533 p.

Pritt, J.W., and Raese, J.W., eds., 1995, Quality 

ance/quality control manual, National Wa

Quality Laboratory: U.S. Geological Surv

Open-File Report 95–443, 35 p.

Riggs, H.C., 1968, Some statistical tools in hyd

U.S. Geological Survey Techniques of Wa

Resources Investigations, book 4, chap. A

Figures 1–9

Base from U.S. Geological Survey digital data, 1:100,000, 1999 Albers Equal-Area projection standard parallels 43 30', 47 30', and -114 00', 41 45' no false easting or false northing.

U%

$

$$ $

$

$

$

$

$

Shoshone

Kootenai

Benewah

Bunker Hill Superfund Site

Kellogg

Coeur d'Alene R.

North Fork Coeur d'Alen e R.

Pine Cr. South Fork

Prichard Cr.

Canyon Cr. Ninemile Cr. Montgomery Cr.

Placer Cr.

Coeur d'Alene R.

5 8 2

4

1

3

13

16

E

37' 30"

30'

22' 30"

Figure 1. Locations of nine water-quality stations monitored over hydrographs of spring 1999 snowmwithin Coeur d'Alene River Basin, Idaho.

0 5 10 1

0 5 

47

116

o 47

116o o

o

$ Gaging station and number or letter Explanation

00'

o

o o

o

11

Figure 1. Locations of nine water-quality stations monitored over hydrographs of spring 1999 snowmelt runoff, Coe
USGS Station 12413040 - 

h Fork Coeur d'Alene River above Deadman Gulch near Mullan, Idaho

5/6/99 5/11/99 5/16/99 5/21/99 5/26/99 5/31/99 6/5/99

ality sample collected

 Concentration, in μg/LCd, WWR = .05Cd, dissolved = .11Pb, WWR = 4.66Pb, dissolved = .38Zn, WWR = 9.69Zn, dissolved = 4.13

 Load, in pounds/day

Cd, WWR = .07Cd, dissolved = .14Pb, WWR = 5.94Pb, dissolved = .49Zn, WWR = 12.3Zn, dissolved = 5.26

 Concentration, in μg/LCd, WWR = .05Cd, dissolved = .02Pb, WWR = 3.54Pb, dissolved = .21Zn, WWR = 9.24Zn, dissolved = 4.25

Load, in pounds/day

Cd, WWR = .03Cd, dissolved = .01Pb, WWR = 2.56Pb, dissolved = .15Zn, WWR = 6.69Zn, dissolved = 3.08

 Concentration, in μg/LCd, WWR = .11Cd, dissolved = .03Pb, WWR = 12.6Pb, dissolved = .31Zn, WWR = 20Zn, dissolved = 3.49

Load, in pounds/day

Cd, WWR = .22Cd, dissolved = .07Pb, WWR = 24.9Pb, dissolved = .61Zn, WWR = 39.5Zn, dissolved = 6.90

on, in μg/L

04

 = <1

.33

 = <1

17

= 8.22

unds/day

02

 = na

.09

 = na

29

= 3.84

estimated

999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc 

t South Fork Coeur d'Alene River above Deadman Gulch near Mullan, Idaho.

USGS, U.S. Geological Survey; WWR, whole-water recoverable; μg/L, micrograms per liter; na, not applicable; 

 less than)

 Concentration, in μg/LCd, WWR = .04Cd, dissolved = .04Pb, WWR = 2.38Pb, dissolved = .55Zn, WWR = 6.34Zn, dissolved = 3.94

Load, in pounds/day

Cd, WWR = .04Cd, dissolved = .04Pb, WWR = 2.48Pb, dissolved = .57Zn, WWR = 6.61Zn, dissolved = 4.11
USGS Station 12413125 - Canyon Creek above mouth at Wallace, Idaho

5/6/99 5/11/99 5/16/99 5/21/99 5/26/99 5/31/99 6/5/99

ty sample collected Concentration, in μg/L Cd, WWR = 4.57

Cd, dissolved = 4.38Pb, WWR = 98.9Pb, dissolved = 23.4Zn, WWR = 568Zn, dissolved = 571

 Load, in pounds/day

Cd, WWR = 5.95Cd, dissolved = 5.70Pb, WWR = 129Pb, dissolved = 30.5Zn, WWR = 739Zn, dissolved = 743

Concentration, in μg/L

Cd, WWR = 5.13Cd, dissolved = 4.75Pb, WWR = 251Pb, dissolved = 16.6Zn, WWR = 663Zn, dissolved = 604 Load, in pounds/dayCd, WWR = 7.23Cd, dissolved = 6.69Pb, WWR = 353Pb, dissolved = 23.4Zn, WWR = 934Zn, dissolved = 851

ation, in μg/L

= 9.39

ved = 9.17

= 55.1

ved = 21.7

= 1,280

ved = 1,290

pounds/day

= 4.25 

ved = 4.15

= 24.9

ved = 9.81

= 579

ved = 584

Concentration, in μg/LCd, WWR = 10.8Cd, dissolved = 5.83Pb, WWR = 2,000Pb, dissolved = 26.3Zn, WWR = 1,440Zn, dissolved = 671

 Load, in pounds/day

Cd, WWR = 22.4Cd, dissolved = 12.1Pb, WWR = 4,150Pb, dissolved = 54.5Zn, WWR = 2,990Zn, dissolved = 1,390

Figure 3. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc  at Canyon Creek above mouth at Wallace, Idaho. (USGS, U.S. Geological Survey; WWR, whole-water recoverable; 

μg/L, micrograms per liter)
USGS Station 12413130 - Ninemile Creek above mouth at Wallace, Idaho

5/6/99 5/11/99 5/16/99 5/21/99 5/26/99 5/31/99 6/5/99

ality sample collected

 Concentration, in μg/L

Cd, WWR = 6.46Cd, dissolved = 6.36Pb, WWR = 104Pb, dissolved = 22.1Zn, WWR = 946Zn, dissolved = 974 Load, in pounds/dayCd, WWR = 1.92Cd, dissolved = 1.89Pb, WWR = 30.9Pb, dissolved = 6.56Zn, WWR = 281Zn, dissolved = 289

 Concentration, in μg/L

Cd, WWR = 7.27Cd, dissolved = 6.36Pb, WWR = 267Pb, dissolved = 23.1Zn, WWR = 1100Zn, dissolved = 1020 Load, in pounds/dayCd, WWR = 4.32Cd, dissolved = 3.78Pb, WWR = 159Pb, dissolved = 13.7Zn, WWR = 653Zn, dissolved = 606

 Concentration, in μg/L

Cd, WWR = 9.26Cd, dissolved = 8.28Pb, WWR = 223Pb, dissolved = 23.1Zn, WWR = 1300Zn, dissolved = 1240

 Load, in pounds/day

Cd, WWR = 3.05Cd, dissolved = 2.73Pb, WWR = 73.4Pb, dissolved = 7.61Zn, WWR = 428Zn, dissolved = 408

n, in μg/L

.8

= 16.2

.2

 25.8

80

 2690

nds/day

11

= 3.0

67

 4.78

8

 498

 Concentration, in μg/LCd, WWR = 7.26Cd, dissolved = 6.45Pb, WWR = 804Pb, dissolved = 22.8Zn, WWR = 1480Zn, dissolved = 981

 Load, in pounds/day

Cd, WWR = 4.82Cd, dissolved = 4.28Pb, WWR = 534Pb, dissolved = 15.1Zn, WWR = 983Zn, dissolved = 652

Figure 4. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc 

at Ninemile Creek above mouth at Wallace, Idaho.(USGS, U.S. Geological Survey; WWR, whole-water recoverable; 

μg/L, micrograms per liter)
USGS Station 12413150 - South Fork Coeur d'Alene River at Silverton, Idaho

5/6/99 5/11/99 5/16/99 5/21/99 5/26/99 5/31/99 6/5/99

ter-quality sample collected

 Concentration, in μg/LCd, WWR = 1.86Cd, dissolved = 1.73Pb, WWR = 36.9Pb, dissolved = 5.30Zn, WWR = 265Zn, dissolved = 253

Load, in pounds/day

Cd, WWR = 10.4Cd, dissolved = 9.72Pb, WWR = 207Pb, dissolved = 29.8Zn, WWR = 1,490Zn, dissolved = 1,590

 Concentration, in μg/LCd, WWR = 4.12Cd, dissolved = 1.32Pb, WWR = 539Pb, dissolved = 5.44Zn, WWR = 520Zn, dissolved = 204

 Load, in pounds/day

Cd, WWR = 34.9Cd, dissolved = 11.2Pb, WWR = 4,570Pb, dissolved = 46.1Zn, WWR = 4,410Zn, dissolved = 1,730

 Concentration, in μg/L

Cd, WWR = 2.15Cd, dissolved = 1.74Pb, WWR = 107Pb, dissolved = 4.40Zn, WWR = 292Zn, dissolved = 247

Load, in pounds/day

Cd, WWR = 14.3Cd, dissolved = 11.6Pb, WWR = 711Pb, dissolved = 29.2Zn, WWR = 1,940Zn, dissolved = 1,640

 Concentration, in μg/LCd, WWR = 3.28Cd, dissolved = 1.72Pb, WWR = 387Pb, dissolved = 4.90Zn, WWR = 453Zn, dissolved = 244

Load, in pounds/day

Cd, WWR = 21.6Cd, dissolved = 11.3Pb, WWR = 2,550Pb, dissolved = 32.3Zn, WWR = 2,980Zn, dissolved = 1,610

tration, in μg/L

R = 3.56

ved = 3.46

R = 17.1

ved = 6.62

 = 503

ved = 543

pounds/day

R = 9.21

ved = 8.95

R = 44.2

ved = 17.1

 = 1,300

ved = 1,400

gure 5. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc

at South Fork Coeur d'Alene River at Silverton, Idaho.(USGS, U.S. Geological Survey; WWR, whole-water recoverable; 

μg/L, micrograms per liter)
USGS Station 12413210 - 

South Fork Coeur d'Alene River at Elizabeth Park near Kellogg, Idaho

5/6/99 5/11/99 5/16/99 5/21/99 5/26/99 5/31/99 6/5/99

ter-quality sample collected Concentration, in μg/L Cd, WWR = 1.93

Cd, dissolved = 1.74Pb, WWR = 38.9Pb, dissolved = 4.0Zn, WWR = 248Zn, dissolved = 237

Load, in pounds/day

Cd, WWR = 15.1Cd, dissolved = 13.6Pb, WWR = 305Pb, dissolved = 31.3Zn, WWR = 1,940Zn, dissolved = 1,860

 Concentration, in μg/L

Cd, WWR = 2.40Cd, dissolved = 1.74Pb, WWR = 180Pb, dissolved = 4.10Zn, WWR = 327Zn, dissolved = 228

Load, in pounds/day

Cd, WWR = 22.6Cd, dissolved = 16.3Pb, WWR = 1,690Pb, dissolved = 38.5Zn, WWR = 3,070Zn, dissolved = 2,140

 Concentration, in μg/LCd, WWR = 4.23Cd, dissolved = 1.38Pb, WWR = 336Pb, dissolved = 3.10Zn, WWR = 598Zn, dissolved = 184

Load, in pounds/day

Cd, WWR = 56.2Cd, dissolved = 18.3Pb, WWR = 4,460Pb, dissolved = 41.2Zn, WWR = 7,940Zn, dissolved = 2,440

 Concentration, in μg/L

Cd, WWR = 3.66Cd, dissolved = 3.56Pb, WWR = 16.2Pb, dissolved = 3.69Zn, WWR = 505Zn, dissolved = 561

Load, in pounds/day

Cd, WWR = 13.1Cd, dissolved = 12.8Pb, WWR = 57.9Pb, dissolved = 13.2Zn, WWR = 1,810Zn, dissolved = 2,010

Figure 6. 1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc  at South Fork Coeur d'Alene River at Elizabeth Park near Kellogg, Idaho. (USGS, U.S. Geological Survey; WWR, whole-water recoverable; μg/L, micrograms per liter)
USGS Station 12413445 - Pine Creek below Amy Gulch near Pinehurst, Idaho

5/6/99 5/11/99 5/16/99 5/21/99 5/26/99 5/31/99 6/5/99

quality sample collected

 Concentration, in μg/LCd, WWR = .14Cd, dissolved = .15Pb, WWR = 1.42Pb, dissolved = .82Zn, WWR = 41.5Zn, dissolved = 39.7

Load, in pounds/day

Cd, WWR = .44Cd, dissolved = .47Pb, WWR = 4.55Pb, dissolved = 2.61Zn, WWR = 133Zn, dissolved = 127

 Concentration, in μg/LCd, WWR = .14Cd, dissolved = .13Pb, WWR = 3.96Pb, dissolved =.54Zn, WWR = 42.3Zn, dissolved = 39.8

Load, in pounds/day

Cd, WWR = .54Cd, dissolved = .51Pb, WWR = 15.3Pb, dissolved = 2.10Zn, WWR = 164Zn, dissolved = 154

 Concentration, in μg/L

Cd, WWR = .27Cd, dissolved = .15Pb, WWR = 31.2Pb, dissolved = .78Zn, WWR = 76.1Zn, dissolved = 39.2

Load, in pounds/day

Cd, WWR = 1.95Cd, dissolved = 1.06Pb, WWR = 226Pb, dissolved = 5.64Zn, WWR = 551Zn, dissolved = 284

 Concentration, in μg/LCd, WWR = .19Cd, dissolved = .20Pb, WWR = .78Pb, dissolved = .16Zn, WWR = 67.9Zn, dissolved = 67.6

Load, in pounds/day

Cd, WWR = .59Cd, dissolved = .62Pb, WWR = 2.39Pb, dissolved = .49Zn, WWR = 209Zn, dissolved = 208

ation, in μg/L

= .30

ed = <1

= .93

ed = <1

= 94.5

ed = 94.6

pounds/day

= .49

ed = na

= 1.50

ed = na

= 152

ed = 152

1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc 

at Pine Creek below Amy Gulch near Pinehurst, Idaho.(USGS, U.S. Geological Survey; WWR, whole-water recoverable; 

μg/L, micrograms per liter;

na, not applicable; <, less than)
USGS Station 12413470 - South Fork Coeur d'Alene River near Pinehurst, Idaho

5/6/99 5/11/99 5/16/99 5/21/99 5/26/99 5/31/99 6/5/99

quality sample collected Concentration, in ug/L Cd, WWR = 2.84 

Cd, dissolvd = 2.10Pb, WWR = 128Pb, dissolved = 3.63Zn, WWR = 364Zn, dissolved = 317

 Load, in pounds/day

Cd, WWR = 33.1Cd, dissolved = 24.5Pb, WWR = 1,490Pb, dissolved = 42.3Zn, WWR = 4,250Zn, dissolved = 3,700

 Concentration, in ug/LCd, WWR = 3.40Cd, dissolved = 1.76Pb, WWR = 322Pb, dissolved = 2.80Zn, WWR = 466Zn, dissolved = 269

 Load, in pounds/day

Cd, WWR = 50.7Cd, dissolved = 26.2Pb, WWR = 4,800Pb, dissolved = 41.7Zn, WWR = 6,940Zn, dissolved = 4,010

 Concentration, in ug/LCd, WWR = 5.51Cd, dissolved = 1.60Pb, WWR = 774Pb, dissolved = 3.66Zn, WWR = 687Zn, dissolved = 227

 Load, in pounds/day

Cd, WWR = 125Cd, dissolved = 36.2Pb, WWR = 17,500Pb, dissolved = 82.8Zn, WWR = 15,500Zn, dissolved = 5,140

ration, in ug/L

= 3.98

ved = 3.82

= 44.4

ved = 4.96

= 589

ved = 601

pounds/day

 = 24.3

ved = 23.3

= 271

ved = 30.3

= 3,590

ved = 3,660

999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc 

at South Fork Coeur d'Alene River near Pinehurst, Idaho.(USGS, U.S. Geological Survey; WWR, whole-water recoverable; 

μg/L, micrograms per liter)
USGS Station 12413000 - North Fork Coeur d'Alene River at Enaville, Idaho

5/6/99 5/11/99 5/16/99 5/21/99 5/26/99 5/31/99 6/5/99

uality sample collected Concentration, in μg/L

Cd, WWR = .11Cd, dissolved = .03Pb, WWR = 11.2Pb, dissolved = .20Zn, WWR = 18.8Zn, dissolved = 4.60 Load, in pounds/dayCd, WWR = 6.41Cd, dissolved = 1.86Pb, WWR = 674Pb, dissolved = 11.7Zn, WWR = 1,130Zn, dissolved = 276

Concentration, in μg/LCd, WWR = .04Cd, dissolved = .04Pb, WWR = 2.25Pb, dissolved = .11Zn, WWR = 7.0Zn, dissolved = 4.32 Load, in pounds/dayCd, WWR = 1.64Cd, dissolved = 1.77Pb, WWR = 102Pb, dissolved = 5.09Zn, WWR = 318Zn, dissolved = 196

Concentration, in μg/L

Cd, WWR = .02Cd, dissolved = .02Pb, WWR = .67Pb, dissolved = .06Zn, WWR = 4.36Zn, dissolved = 4.40 Load, in pounds/dayCd, WWR = .53Cd, dissolved = .72Pb, WWR = 21.1Pb, dissolved = 1.89Zn, WWR = 137Zn, dissolved = 138

Concentration, in μg/L

Cd, WWR = <1Cd, dissolved = <1Pb, WWR = 4.0Pb, dissolved = <1Zn, WWR = nsZn, dissolved = ns Load, in pounds/dayCd, WWR = naCd, dissolved = naPb, WWR = 138Pb, dissolved = naZn, WWR = nsZn, dissolved = ns

ation, in μg/L

 = .04

ved = <1

 = .78

ved = <1

 = 6.89

ved = 4.17

 pounds/day

 = 1.03

ved = na

 = 20.6

ved = na

 = 182

ved = 110

1999 snowmelt-runoff hydrograph with concentrations and loads of cadmium, lead, and zinc 

at North Fork Coeur d'Alene River at Enaville, Idaho.(USGS, U.S. Geological Survey; WWR, whole-water recoverable; 

μg/L, micrograms per liter; na, not applicable;

ns, not sampled; <less than)

Table 1

Number Name

12413040 South Fork Coeur d'Alene River above Deadman Gulch near Mullan12413150 South Fork Coeur d'Alene River at Silverton

12413169 South Fork Coeur d'Alene River below Twomile Creek near Osburn

12413210 South Fork Coeur d'Alene River at Elizabeth Park near Kellogg12413470 South Fork Coeur d'Alene River near Pinehurst

12413125Canyon Creek above mouth at Wallace

12413130 Ninemile Creek above mouth at Wallace12413445Pine Creek below Amy Gulch near Pinehurst12413000 North Fork Coeur d'Alene River at Enaville

letter

 on

1

U.S. Geological Survey water-quality station

mes and identification numbers of nine U.S. Geological Survey water-quality

ions monitored during the 1999 snowmelt runoff, Coeur d'Alene River Basin, Idaho.

Table 2

Load 

WWR WWR1 Load DISS DISS2 Load WWR WWR1 Load DISS DISS2 Load WWR WWR1 Load DISS DISS2

5/5/99 86.6 0.02 0.04 na <1 1.09 2.33 na <1 4.29 9.17 3.84 8.22

5/22/99 134 0.03 0.05 0.01 0.02 2.56 3.54 0.15 0.21 6.69 9.24 3.08 4.255/25/99 366 0.22 0.11 0.07 0.03 24.9 12.6 0.61 0.31 39.5 20 6.90 3.495/27/99 236 0.07 0.05 0.14 0.11 5.94 4.66 0.49 0.38 12.3 9.69 5.26 4.135/31/99 193 0.04 0.04 0.04 0.04 2.48 2.38 0.57 0.55 6.61 6.34 4.11 3.94

5/5/99 83.8 4.25 9.39 4.15 9.17 24.9 55.1 9.81 21.7 579 1280 584 1290

5/24/99 384 22.4 10.8 12.1 5.83 4150 2000 54.5 26.3 2990 1440 1390 6715/27/99 261 7.23 5.13 6.69 4.75 353 251 23.4 16.6 934 663 851 604

6/2/99 241 5.95 4.57 5.70 4.38 129 98.9 30.5 23.4 739 568 743 5715/5/99 34.3 3.11 16.8 3.0 16.2 9.67 52.2 4.78 25.8 478 2580 498 2690

5/23/99 61 3.05 9.26 2.73 8.28 73.4 223 7.61 23.1 428 1300 408 12405/26/99 123 4.82 7.26 4.28 6.45 534 804 15.1 22.8 983 1480 652 9815/27/99 110 4.32 7.27 3.78 6.36 159 267 13.7 23.1 653 1100 606 10205/31/99 55 1.92 6.46 1.89 6.36 30.9 104 6.56 22.1 281 946 289 974

5/5/99 479 9.21 3.56 8.95 3.46 44.2 17.1 17.1 6.62 1300 503 1400 543

5/24/99 1220 21.6 3.28 11.3 1.72 2550 387 32.3 4.90 2980 453 1610 2445/26/99 1570 34.9 4.12 11.2 1.32 4570 539 46.1 5.44 4410 520 1730 2045/27/99 1230 14.3 2.15 11.6 1.74 711 107 29.2 4.40 1940 292 1640 247

6/1/99 1040 10.4 1.86 9.72 1.73 207 36.9 29.8 5.30 1490 265 1590 253

taneous loads of cadmium, lead, and zinc measured during 1999 snowmelt runoff at nine water-quality stations on the North and South 

aho

Alene River; SFCDR, South Fork Coeur d'Alene River; ns, not sampled; na, not applicable; μg/L, micrograms per liter; ft3/s, cubic feet per

 discharge; WWR, whole-water recoverable; DISS, dissolved; USGS, U.S. Geological Survey]

Cadmium Concentration (μg/L)

and Instantaneous Load 

(pounds/day)

Lead Concentration (μg/L)

and Instantaneous Load 

(pounds/day)

Zinc Concentration (μg/L)

and Instantaneous Load 

(pounds/day) 

Sample Date

Inst.

Q

(ft3/s)
Load 

WWR WWR1 Load DISS DISS2 Load WWR WWR1 Load DISS DISS2 Load WWR WWR1 Load DISS DISS2

Cadmium Concentration (μg/L)

and Instantaneous Load 

(pounds/day)

Lead Concentration (μg/L)

and Instantaneous Load 

(pounds/day)

Zinc Concentration (μg/L)

and Instantaneous Load 

(pounds/day) 

Sample Date

Inst.

Q

(ft3/s)

5/5/99 533 11 3.81 10.6 3.69 47.1 16.4 17.8 6.17 1460 507 1590 552

5/24/99 1390 27.2 3.62 13.8 1.84 2820 376 39.8 5.30 3760 501 1880 2505/26/99 1850 38.7 3.87 15.8 1.58 5000 500 44.3 4.43 6280 629 2230 2235/27/99 1370 18.2 2.46 14.4 1.95 1180 159 30.2 4.08 2560 346 1900 257

6/1/99 999 11.2 2.08 10.7 1.99 210 38.9 30.5 5.65 1530 284 1450 2685/6/99 664 13.1 3.66 12.8 3.56 57.9 16.2 13.2 3.69 1810 505 2010 561

5/25/99 2460 56.2 4.23 18.3 1.38 4460 336 41.2 3.10 7940 598 2440 1845/27/99 1740 22.6 2.40 16.3 1.74 1690 180 38.5 4.10 3070 327 2140 228

6/1/99 1450 15.1 1.93 13.6 1.74 305 38.9 31.3 4.0 1940 248 1860 2375/6/99 298 0.49 0.30 na <1 1.50 0.93 na <1 152 94.5 152 94.6

5/19/99 569 0.59 0.19 0.62 0.20 2.39 0.78 0.49 0.16 209 67.9 208 67.65/25/99 1340 1.95 0.27 1.06 0.15 226 31.2 5.64 0.78 551 76.1 284 39.25/27/99 716 0.54 0.14 0.51 0.13 15.3 3.96 2.10 0.54 164 42.3 154 39.8

6/1/99 593 0.44 0.14 0.47 0.15 4.55 1.42 2.61 0.82 133 41.5 127 39.75/6/99 1130 24.3 3.98 23.3 3.82 271 44.4 30.3 4.96 3590 589 3660 601

5/25/99 4190 125 5.51 36.2 1.60 17500 774 82.8 3.66 15500 687 5140 2275/27/99 2760 50.7 3.40 26.2 1.76 4800 322 41.7 2.80 6940 466 4010 269

6/2/99 2160 33.1 2.84 24.5 2.10 1490 128 42.3 3.63 4250 364 3700 3175/6/99 4900 1.03 0.04 na <1 20.6 0.78 na <1 182 6.89 110 4.17

5/20/99 6400 na <1 na <1 138 4.00 na <1 na ns na ns5/25/99 11100 6.41 0.11 1.86 0.03 671 11.2 11.7 0.20 1130 18.8 276 4.605/27/99 8420 1.64 0.04 1.77 0.04 102 2.25 5.09 0.11 318 7.0 196 4.32

6/2/99 5820 0.53 0.02 0.72 0.02 21.1 0.67 1.89 0.06 137 4.36 138 4.40

 on water, suspended-sediment mixture at U.S. Geological Survey National Water-Quality Laboratory.

eter capsule filter.
Appendix A. Selected water-quality analyses from the U.S. Geological Survey Nat

Water-Quality Laboratory for nine water-quality stations sampled during the 19

snowmelt runoff, Coeur d’Alene River Basin, Idaho 

31

SPOKANE RIVER BASIN

12413040 SOUTH FORK COEUR D’ALENE RIVER ABOVE DEADMAN GULCH NEAR MULLAN, ID

WATER-QUALITY RECORDS

PERIOD OF RECORD.--October 1998 to current year.

WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

DIS- PH

CHARGE, SPE- WATER HARDINST. CIFIC WHOLE NESS CALCIUM

CUBIC CON- FIELD TEMPER- TEMPER- TOTAL DISFEET DUCT- (STAND- ATURE ATURE (MG/L SOLVED

DATE TIME PER ANCE ARD AIR WATER AS (MG/L 

SECOND (US/CM) UNITS) (DEG C) (DEG C) CACO3) AS CA)

(00061) (00095) (00400) (00020) (00010) (00900) (00915)

OCT

22... 1220 9.7 144 7.6 9.5 7.0 58 16

NOV

16... 1530 76 149 7.7 2.0 5.4 56 16

DEC

14... 1610 20 144 7.7 -1.0 2.5 52 14

JAN

20... 0855 22 132 7.5 1.0 2.0 52 14

MAR

22... 1115 56 115 7.7 6.5 2.0 42 11

APR

19... 0845 115 79 7.6 4.0 3.5 32 7.9

MAY

05... 0730 87 79 7.3 3.5 3.5 32 8.2

22... 1710 134 52 7.4 16.5 8.5 20 5.4

25... 1100 366 31 7.3 24.0 6.4 12 3.3

27... 1000 236 35 7.3 21.0 6.0 14 3.8

31... 1415 193 37 7.4 10.5 5.5 15 4.0

JUN

16... 0755 230 32 7.2 19.5 5.9 12 3.4

JUL

12... 1425 64 49 7.3 30.0 11.8 21 5.5

AUG

12... 0730 22 95 7.5 13.5 10.5 39 11

31... 0730 16 115 8.0 12.0 9.5 50 13

ANC

MAGNE- WATER CHLO- FLUO- SILICA,

SIUM, SODIUM, UNFLTRD SULFATE RIDE, RIDE, DISDIS- DIS- FET DIS- DIS- DIS- SOLVED

SOLVED SOLVED FIELD SOLVED SOLVED SOLVED (MG/L 

DATE (MG/L (MG/L MG/L AS (MG/L (MG/L (MG/L AS

AS MG) AS NA) CACO3 AS SO4) AS CL) AS F) SIO2) 

(00925) (00930) (00410) (00945) (00940) (00950) (00955)

OCT

22... 4.6 -- -- -- -- -- --

NOV

16... 4.1 -- -- -- -- -- --

DEC

14... 4.1 -- -- -- -- -- --

JAN

20... 4.1 -- -- -- -- -- --

MAR

22... 3.7 -- -- -- -- -- --

APR

19... 2.9 -- -- -- -- -- --

MAY

05... 2.8 2.2 -- 6.3 3.3 <.10 8.8

22... 1.7 -- 15 -- -- -- --

25... 1.0 1.0 11 2.0 .77 <.10 7.0

27... 1.2 -- -- -- -- -- --

31... 1.3 -- -- -- -- -- --

JUN

16... .96 1.0 12 2.6 .54 <.10 7.1

JUL

12... 1.7 1.3 20 3.1 .92 <.10 8.0

AUG

12... 3.2 2.0 37 8.1 1.6 <.10 9.6

31... 4.0 2.2 41 11 1.8 <.10 9.8

CADMIUM LEAD, ZINC, 

CADMIUM WATER LEAD, TOTAL ZINC, TOTAL 

DIS- UNFLTRD DIS- RECOV- DIS- RECOVSOLVED TOTAL SOLVED ERABLE SOLVED ERABLE

DATE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L 

AS CD) AS CD) AS PB) AS PB) AS ZN) AS ZN)

(01025) (01027) (01049) (01051) (01090) (01092)

OCT

22... 1220 <1 <1 <1 <1 <20 <10

NOV

16... 1530 <1 <1 2 10 59 60

DEC

14... 1610 <1 <1 <1 7 24 30

JAN

20... 0855 <1 <1 1 4 22 20

MAR

22... 1115 <1 <1 <1 24 <20 52.4 

APR

19... 0845 <1 <1 <1 5 E9 E32.6 

MAY

05... 0730 <1 <.1 <1 2.3 8 9.2 

22... 1710 <1 <.1 <1 3.5 4 9.2 

25... 1100 <1 .11 <1 12.6 3 20.0 

27... 1000 <1 <.1 <1 4.7 4 9.7 

31... 1415 <1 <.1 <1 2.4 4 6.3 

JUN

16... 0755 <1 <.1 <1 2.9 4 6.2 

JUL

12... 1425 <1 <.1 <1 1.8 3 4.4 

AUG

12... 0730 <1 <.1 <1 1.4 3 6.7 

31... 0730 <1 <.1 <1 1.3 8 8.2 

E Positive detection, but below detection limit.
32

SPOKANE RIVER BASIN

12413125 CANYON CREEK ABOVE MOUTH AT WALLACE, ID

WATER-QUALITY RECORDS

PERIOD OF RECORD.--July 1972 to October 1972, October 1998 to current year.

WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

DIS- PH

CHARGE, SPE- WATER HARDINST. CIFIC WHOLE NESS CALCIUM

CUBIC CON- FIELD TEMPER- TEMPER- TOTAL DISFEET DUCT- (STAND- ATURE ATURE (MG/L SOLVED

DATE TIME PER ANCE ARD AIR WATER AS (MG/L 

SECOND (US/CM) UNITS) (DEG C) (DEG C) CACO3) AS CA)

(00061) (00095) (00400) (00020) (00010) (00900) (00915)

OCT

26... 1315 13 127 7.8 12.5 10.0 49 14

NOV

18... 1200 16 133 7.3 3.5 5.0 57 16

DEC

15... 1225 25 130 7.6 2.0 2.8 48 13

28... 1415 27 128 6.7 3.5 .0 47 13

MAR

23... 0845 96 91 7.1 6.0 3.5 31 8.7

APR

19... 1100 138 60 7.2 8.0 5.5 22 6.2

MAY

05... 1255 84 56 7.1 10.0 7.0 21 5.9

24... 1630 384 31 7.1 26.5 9.5 11 3.0

27... 0900 261 28 7.0 9.0 5.5 11 3.0

JUN

02... 1030 241 31 6.0 10.0 7.0 11 3.2

15... 0915 263 31 6.9 27.0 10.0 10 2.8

JUL

08... 1045 107 39 7.0 18.5 9.9 16 4.6

AUG

05... 1240 34 83 7.4 25.0 17.5 35 9.9

30... 1325 22 103 7.3 19.0 17.0 44 13

ANC

MAGNE- WATER CHLO- FLUO- SILICA,

SIUM, SODIUM, UNFLTRD SULFATE RIDE, RIDE, DISDIS- DIS- FET DIS- DIS- DIS- SOLVED

SOLVED SOLVED FIELD SOLVED SOLVED SOLVED (MG/L 

DATE (MG/L (MG/L MG/L AS (MG/L (MG/L (MG/L AS

AS MG) AS NA) CACO3 AS SO4) AS CL) AS F) SIO2) 

(00925) (00930) (00410) (00945) (00940) (00950) (00955)

OCT

26... 3.5 -- -- -- -- -- --

NOV

18... 4.1 -- -- -- -- -- --

DEC

15... 3.4 -- -- -- -- -- --

28... 3.4 -- -- -- -- -- --

MAR

23... 2.2 -- -- -- -- -- --

APR

19... 1.6 -- -- -- -- -- --

MAY

05... 1.5 1.2 -- 9.0 .27 <.10 8.4

24... .75 .77 10 5.1 .49 <.10 6.8

27... .75 -- -- -- -- -- --

JUN

02... .81 -- -- -- -- -- --

15... .69 .66 8 3.3 .18 <.10 6.2

JUL

08... 1.2 .81 16 4.3 .16 <.10 6.4

AUG

05... 2.5 1.3 28 11 .36 <.10 8.1

30... 3.2 1.4 35 15 E.25 <.10 8.5

CADMIUM LEAD, ZINC, 

CADMIUM WATER LEAD, TOTAL ZINC, TOTAL 

DIS- UNFLTRD DIS- RECOV- DIS- RECOVSOLVED TOTAL SOLVED ERABLE SOLVED ERABLE

DATE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L 

AS CD) AS CD) AS PB) AS PB) AS ZN) AS ZN)

(01025) (01027) (01049) (01051) (01090) (01092)

OCT

26... 1315 21 18 31 43 2400 2300

NOV

18... 1200 31 -- 32 49 4300 3900

DEC

15... 1225 28 31 29 52 4300 4400

28... 1415 30 32 31 230 4400 4200

MAR

23... 0845 26 26 40 120 3600 3560

APR

19... 1100 14 15 22 370 1800 1890

MAY

05... 1255 9 9.4 22 55.1 1290 1280

24... 1630 6 10.8 26 2000 671 1440

27... 0900 5 5.1 17 251 604 663

JUN

02... 1030 4 4.6 23 98.9 571 568

15... 0915 4 4.1 18 151 451 466

JUL

08... 1045 5 5.4 20 33.2 702 664

AUG

05... 1240 12 12.6 31 58.9 1480 1390

30... 1325 15 15.0 37 50.5 1790 1780

E Positive detection, but below detection limit.
33

SPOKANE RIVER BASIN

12413130 NINEMILE CREEK ABOVE MOUTH AT WALLACE, ID

WATER-QUALITY RECORDS

PERIOD OF RECORD.--July 1972 to October 1972, October 1998 to current year.

WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

DIS- PH

CHARGE, SPE- WATER HARDINST. CIFIC WHOLE NESS CALCIUM

CUBIC CON- FIELD TEMPER- TEMPER- TOTAL DISFEET DUCT- (STAND- ATURE ATURE (MG/L SOLVED

DATE TIME PER ANCE ARD AIR WATER AS (MG/L 

SECOND (US/CM) UNITS) (DEG C) (DEG C) CACO3) AS CA)

(00061) (00095) (00400) (00020) (00010) (00900) (00915)

OCT

27... 1135 3.2 157 7.5 14.5 7.0 61 17

NOV

19... 0855 4.0 182 7.3 2.5 3.5 75 21

DEC

10... 0805 6.0 201 7.8 -1.0 1.0 74 20

JAN

21... 1125 13 158 7.4 3.5 3.0 71 19

MAR

22... 1405 78 130 7.5 11.0 6.0 56 15

APR

19... 1300 80 117 7.6 8.0 5.5 48 13

MAY

05... 1400 34 109 7.5 10.0 6.0 43 12

23... 1355 61 63 7.3 29.0 12.0 24 6.7

26... 0845 123 42 6.8 10.5 5.2 16 4.4

27... 0745 110 43 7.1 5.0 5.0 16 4.5

31... 1230 55 48 7.3 12.0 7.3 17 4.7

JUN

15... 1415 49 44 7.3 29.5 15.2 16 4.5

JUL

07... 1425 17 74 7.2 24.0 14.0 27 7.8

AUG

04... 1540 8.6 109 7.1 28.0 22.0 44 13

SEP

01... 1000 5.0 129 7.1 10.0 7.5 53 15

ANC

MAGNE- WATER CHLO- FLUO- SILICA,

SIUM, SODIUM, UNFLTRD SULFATE RIDE, RIDE, DISDIS- DIS- FET DIS- DIS- DIS- SOLVED

SOLVED SOLVED FIELD SOLVED SOLVED SOLVED (MG/L 

DATE (MG/L (MG/L MG/L AS (MG/L (MG/L (MG/L AS

AS MG) AS NA) CACO3 AS SO4) AS CL) AS F) SIO2) 

(00925) (00930) (00410) (00945) (00940) (00950) (00955)

OCT

27... 4.3 -- -- -- -- -- --

NOV

19... 5.1 -- -- -- -- -- --

DEC

10... 5.5 -- -- -- -- -- --

JAN

21... 5.4 -- -- -- -- -- --

MAR

22... 4.7 -- -- -- -- -- --

APR

19... 3.9 -- -- -- -- -- --

MAY

05... 3.5 1.6 -- 16 .88 <.10 13

23... 1.8 -- 18 -- -- -- --

26... 1.1 1.2 13 6.7 .26 <.10 10

27... 1.1 -- -- -- -- -- --

31... 1.2 -- -- -- -- -- --

JUN

15... 1.1 1.2 13 6.4 .24 <.10 10

JUL

07... 1.9 1.5 24 10 .34 <.10 12

AUG

04... 3.1 1.9 32 19 .61 <.10 14

SEP

01... 3.7 2.0 39 23 .37 <.10 14

CADMIUM LEAD, ZINC, 

CADMIUM WATER LEAD, TOTAL ZINC, TOTAL 

DIS- UNFLTRD DIS- RECOV- DIS- RECOVSOLVED TOTAL SOLVED ERABLE SOLVED ERABLE

DATE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L 

AS CD) AS CD) AS PB) AS PB) AS ZN) AS ZN)

(01025) (01027) (01049) (01051) (01090) (01092)

OCT

27... 1135 28 31 28 46 4900 --

NOV

19... 0855 39 -- 36 50 7500 7100

DEC

10... 0805 31 39 36 68 6600 7000

JAN

21... 1125 22 21 44 54 3800 3800

MAR

22... 1405 12 14 23 330 2000 2300

APR

19... 1300 14 17 13 260 2400 2580

MAY

05... 1400 16 16.8 26 52.2 2690 2580

23... 1355 8 9.3 23 223 1240 1300

26... 0845 6 9.3 23 804 981 1480

27... 0745 6 7.3 23 267 1020 1100

31... 1230 6 6.5 22 104 974 946

JUN

15... 1415 6 6.0 25 80.5 864 870

JUL

07... 1425 10 10.6 29 45.6 1570 1760

AUG

04... 1540 17 17.7 33 48.2 2280 2250

SEP

01... 1000 21 -- 29 -- 3570 --
34

SPOKANE RIVER BASIN

12413150 SOUTH FORK COEUR D’ALENE RIVER AT SILVERTON, ID

WATER-QUALITY RECORDS

PERIOD OF RECORD.--October 1998 to current year.

WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

DIS- PH

CHARGE, SPE- WATER HARDINST. CIFIC WHOLE NESS CALCIUM

CUBIC CON- FIELD TEMPER- TEMPER- TOTAL DISFEET DUCT- (STAND- ATURE ATURE (MG/L SOLVED

DATE TIME PER ANCE ARD AIR WATER AS (MG/L 

SECOND (US/CM) UNITS) (DEG C) (DEG C) CACO3) AS CA)

(00061) (00095) (00400) (00020) (00010) (00900) (00915)

OCT

22... 1540 43 174 7.9 14.0 9.5 69 19

NOV

17... 0925 68 175 7.1 5.5 5.0 69 19

DEC

10... 1210 81 184 7.4 2.0 3.5 64 17

29... 1300 129 164 7.9 5.0 2.0 59 16

MAR

24... 0830 525 122 7.3 11.0 3.8 46 13

APR

19... 1515 731 85 7.6 12.0 5.0 48 13

MAY

05... 1445 479 85 7.6 10.0 6.0 37 9.9

24... 1030 1220 52 7.2 26.5 6.5 22 6.1

26... 0800 1570 44 6.8 10.5 4.5 18 5.0

27... 0945 1230 51 7.1 14.0 5.0 21 5.8

JUN

01... 0845 1040 53 7.5 12.5 5.5 23 6.2

16... 0950 1180 43 7.4 25.0 8.0 18 5.0

JUL

15... 0800 282 75 7.9 12.0 9.0 32 8.7

AUG

05... 1540 133 112 7.7 27.0 18.0 48 13

SEP

01... 0840 77 140 7.2 7.0 8.0 61 17

ANC

MAGNE- WATER CHLO- FLUO- SILICA,

SIUM, SODIUM, UNFLTRD SULFATE RIDE, RIDE, DISDIS- DIS- FET DIS- DIS- DIS- SOLVED

SOLVED SOLVED FIELD SOLVED SOLVED SOLVED (MG/L 

DATE (MG/L (MG/L MG/L AS (MG/L (MG/L (MG/L AS

AS MG) AS NA) CACO3 AS SO4) AS CL) AS F) SIO2) 

(00925) (00930) (00410) (00945) (00940) (00950) (00955)

OCT

22... 5.5 -- -- -- -- -- --

NOV

17... 5.2 -- -- -- -- -- --

DEC

10... 5.1 -- -- -- -- -- --

29... 4.6 -- -- -- -- -- --

MAR

24... 3.6 -- -- -- -- -- --

APR

19... 4.0 -- -- -- -- -- --

MAY

05... 2.9 1.9 -- 7.2 1.7 <.10 8.5

24... 1.6 -- 21 -- -- -- --

26... 1.3 .84 16 3.7 .46 <.10 6.7

27... 1.6 -- -- -- -- -- --

JUN

01... 1.7 -- -- -- -- -- --

16... 1.3 .82 22 3.2 .40 <.10 6.4

JUL

15... 2.4 1.5 27 6.8 .98 <.10 7.2

AUG

05... 3.8 2.4 39 12 1.8 <.10 8.6

SEP

01... 4.9 3.2 48 18 2.3 <.10 9.1

CADMIUM LEAD, ZINC, 

CADMIUM WATER LEAD, TOTAL ZINC, TOTAL 

DIS- UNFLTRD DIS- RECOV- DIS- RECOVSOLVED TOTAL SOLVED ERABLE SOLVED ERABLE

DATE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L 

AS CD) AS CD) AS PB) AS PB) AS ZN) AS ZN)

(01025) (01027) (01049) (01051) (01090) (01092)

OCT

22... 1540 8 8 11 18 1200 1100

NOV

17... 0925 12 11 10 23 1900 1700

DEC

10... 1210 11 11 14 24 1700 1700

29... 1300 8 8 6 33 1300 --

MAR

24... 0830 7 8 8 49 1100 1050

APR

19... 1515 5 5 4 13 700 689

MAY

05... 1445 3 3.6 7 17.1 543 503

24... 1030 2 3.3 5 387 244 453

26... 0800 1 4.1 5 539 204 520

27... 0945 2 2.2 4 107 247 292

JUN

01... 0845 2 1.9 5 36.9 253 265

16... 0950 1 1.6 4 108 181 216

JUL

15... 0800 3 3.2 7 18.9 427 417

AUG

05... 1540 5 5.0 15 42.4 564 539

SEP

01... 0840 7 6.9 13 18.6 1040 901
35

SPOKANE RIVER BASIN

12413210 SOUTH FORK COEUR D’ALENE AT ELIZABETH PARK NEAR KELLOGG, ID

WATER-QUALITY RECORDS

PERIOD OF RECORD.--October 1992 to current year.

WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

DIS- PH

CHARGE, SPE- WATER HARDINST. CIFIC WHOLE NESS CALCIUM

CUBIC CON- FIELD TEMPER- TEMPER- TOTAL DISFEET DUCT- (STAND- ATURE ATURE (MG/L SOLVED

DATE TIME PER ANCE ARD AIR WATER AS (MG/L 

SECOND (US/CM) UNITS) (DEG C) (DEG C) CACO3) AS CA)

(00061) (00095) (00400) (00020) (00010) (00900) (00915)

OCT

19... 1610 68 210 7.7 5.0 10.5 72 19

NOV

17... 1600 94 196 7.8 5.5 6.5 70 19

DEC

15... 1445 200 162 7.5 4.0 4.5 58 16

JAN

21... 1320 358 135 7.5 5.5 4.5 50 13

FEB

10... 0715 235 159 7.6 -1.0 2.0 58 15

MAR

09... 0745 254 148 7.4 3.0 2.5 58 15

APR

12... 1515 355 126 7.6 11.0 6.9 35 9.5

20... 0740 1320 74 7.1 6.0 5.5 30 8.0

MAY

06... 0745 664 97 7.4 .0 4.0 38 10

25... 1345 2460 44 7.3 25.0 9.0 18 5.1

27... 1500 1740 55 7.2 27.5 10.0 22 6.0

JUN

01... 1610 1450 56 7.4 17.0 8.5 22 6.1

JUL

15... 1015 406 86 7.2 18.0 10.5 34 9.1

AUG

09... 1645 168 147 7.6 28.0 19.0 54 14

30... 1505 113 178 7.3 19.5 16.5 65 17

ANC

MAGNE- WATER CHLO- FLUO- SILICA,

SIUM, SODIUM, UNFLTRD SULFATE RIDE, RIDE, DISDIS- DIS- FET DIS- DIS- DIS- SOLVED

SOLVED SOLVED FIELD SOLVED SOLVED SOLVED (MG/L 

DATE (MG/L (MG/L MG/L AS (MG/L (MG/L (MG/L AS

AS MG) AS NA) CACO3 AS SO4) AS CL) AS F) SIO2) 

(00925) (00930) (00410) (00945) (00940) (00950) (00955)

OCT

19... 5.9 -- -- -- -- -- --

NOV

17... 5.6 -- -- -- -- -- --

DEC

15... 4.7 -- -- -- -- -- --

JAN

21... 4.1 -- -- -- -- -- --

FEB

10... 4.8 -- -- -- -- -- --

MAR

09... 4.7 -- -- -- -- -- --

APR

12... 2.7 -- -- -- -- -- --

20... 2.4 -- -- -- -- -- --

MAY

06... 3.1 3.0 -- 12 1.7 <.10 9.1

25... 1.4 1.1 18 4.9 .58 <.10 8.6

27... 1.7 -- -- -- -- -- --

JUN

01... 1.7 1.4 20 <.10 <.10 <.10 8.6

JUL

15... 2.6 2.5 29 11 1.1 <.10 7.9

AUG

09... 4.3 6.1 39 26 2.0 <.10 9.4

30... 5.4 8.1 43 36 2.3 <.10 9.8

CADMIUM LEAD, ZINC, 

CADMIUM WATER LEAD, TOTAL ZINC, TOTAL 

DIS- UNFLTRD DIS- RECOV- DIS- RECOVSOLVED TOTAL SOLVED ERABLE SOLVED ERABLE

DATE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L 

AS CD) AS CD) AS PB) AS PB) AS ZN) AS ZN)

(01025) (01027) (01049) (01051) (01090) (01092)

OCT

19... 1610 8 9 5 10 1100 1000

NOV

17... 1600 10 9 5 14 1400 1400

DEC

15... 1445 7 7 4 8 1100 1100

JAN

21... 1320 5 5 4 8 780 820

FEB

10... 0715 7 7 3 8 1100 1000

MAR

09... 0745 6 7 4 11 1100 1000

APR

12... 1515 4 5 5 130 660 727

20... 0740 3 5 4 260 510 668

MAY

06... 0745 4 3.7 4 16.2 561 505

25... 1345 1 4.2 3 336 184 598

27... 1500 2 2.4 4 180 228 327

JUN

01... 1610 2 1.9 4 38.9 237 248

JUL

15... 1015 3 3.5 6 14.6 444 432

AUG

09... 1645 6 5.8 8 14.4 714 655

30... 1505 6 6.6 8 11.6 819 728
36

SPOKANE RIVER BASIN

12413445 PINE CREEK BELOW AMY GULCH NEAR PINEHURST, ID

WATER-QUALITY RECORDS

PERIOD OF RECORD.--October 1998 to current year.

PERIOD OF DAILY RECORD.--February to September current year.

PERIOD OR DAILY RECORD.--

WATER TEMPERATURES: February to September current year.

SPECIFIC CONDUCTANCE: February to September current year.

INSTRUMENTATION.--Water-quality data recorder since February 1999.

REMARKS.--Missing data due to equipment damage.

EXTREMES FOR CURRENT YEAR--

WATER TEMPERATURES: Maximum recorded, 15.5 oC Aug. 2-4, 6, 8-10, 18-20, 23, 26; minimum recorded, 2.0 oC on March 6-8.

SPECIFIC CONDUCTANCE: Maximum recorded daily mean, 34 micromhos/cm Sep. 22; minimum recorded daily mean,

15 micromhos/cm May 24-30, June 16-17.

WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

DIS- PH

CHARGE, SPE- WATER HARDINST. CIFIC WHOLE NESS CALCIUM

CUBIC CON- FIELD TEMPER- TEMPER- TOTAL DISFEET DUCT- (STAND- ATURE ATURE (MG/L SOLVED

DATE TIME PER ANCE ARD AIR WATER AS (MG/L 

SECOND (US/CM) UNITS) (DEG C) (DEG C) CACO3) AS CA)

(00061) (00095) (00400) (00020) (00010) (00900) (00915)

OCT

21... 1715 13 40 7.1 10.5 11.5 15 3.8

NOV

19... 1353 33 47 6.7 5.0 9.0 16 4.0

DEC

09... 0845 73 47 7.1 .0 6.0 12 3.1

29... 0815 145 34 7.7 1.5 4.0 12 3.0

FEB

24... 1440 788 26 7.1 6.0 3.0 9 2.3

APR

20... 0745 833 21 6.9 8.0 5.0 7 1.7

MAY

06... 0710 298 21 6.3 3.0 4.0 7 1.8

19... 1545 569 20 6.5 15.0 8.0 7 1.7

25... 1100 1340 16 7.3 6.7 8.2 5 1.4

27... 1310 716 17 6.9 17.5 8.5 6 1.5

JUN

01... 1815 593 17 6.6 16.0 8.0 6 1.5

16... 1215 594 17 7.1 27.5 10.4 6 1.6

JUL

20... 1045 55 25 6.8 22.5 12.5 9 2.4

AUG

11... 1550 36 31 6.7 23.0 13.0 11 2.8

31... 1200 21 32 6.7 12.5 11.5 12 3.0

ANC

MAGNE- WATER CHLO- FLUO- SILICA,

SIUM, SODIUM, UNFLTRD SULFATE RIDE, RIDE, DISDIS- DIS- FET DIS- DIS- DIS- SOLVED

SOLVED SOLVED FIELD SOLVED SOLVED SOLVED (MG/L 

DATE (MG/L (MG/L MG/L AS (MG/L (MG/L (MG/L AS

AS MG) AS NA) CACO3 AS SO4) AS CL) AS F) SIO2) 

(00925) (00930) (00410) (00945) (00940) (00950) (00955)

OCT

21... 1.2 -- -- -- -- -- --

NOV

19... 1.4 -- -- -- -- -- --

DEC

09... 1.1 -- -- -- -- -- --

29... 1.0 -- -- -- -- -- --

FEB

24... .82 -- -- -- -- -- --

APR

20... .58 -- -- -- -- -- --

MAY

06... .60 .85 -- 2.4 .16 <.10 8.8

19... .54 -- -- -- -- -- --

25... .42 .74 6 1.3 .17 <.10 6.9

27... .45 -- -- -- -- -- --

JUN

01... .47 -- -- -- -- -- --

16... .48 .68 7 .97 .12 <.10 7.1

JUL

20... .78 .94 10 2.3 .14 <.10 9.0

AUG

11... .93 1.1 10 3.3 .18 <.10 10

31... .99 1.2 11 4.3 E.16 <.10 10

CADMIUM LEAD, ZINC, 

CADMIUM WATER LEAD, TOTAL ZINC, TOTAL 

DIS- UNFLTRD DIS- RECOV- DIS- RECOVSOLVED TOTAL SOLVED ERABLE SOLVED ERABLE

DATE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L 

AS CD) AS CD) AS PB) AS PB) AS ZN) AS ZN)

(01025) (01027) (01049) (01051) (01090) (01092)

OCT

21... 1715 <1 <1 <1 <1 140 --

NOV

19... 1353 <1 <1 <1 <1 140 140

DEC

09... 0845 <1 <1 <1 <1 140 140

29... 0815 <1 <1 <1 2 170 --

FEB

24... 1440 <1 <1 <1 14 140 151

APR

20... 0745 <1 <1 <1 4 120 127

MAY

06... 0710 <1 -- <1 .93 95 94.5 

19... 1545 <1 -- <1 .78 68 67.9 

25... 1100 <1 -- <1 31.2 39 76.1 

27... 1310 <1 -- <1 4.0 40 42.3 

JUN

01... 1815 <1 -- <1 1.4 40 41.5 

16... 1215 <1 -- <1 .80 35 33.9 

JUL

20... 1045 <1 -- <1 -- 87 84.0 

AUG

11... 1550 <1 -- <1 -- 96 94.3 

31... 1200 <1 -- <1 .59 108 102

E Positive detection, but below stated detection limits.
37

SPOKANE RIVER BASIN

12413470 SOUTH FORK COEUR D’ALENE RIVER NEAR PINEHURST, ID

WATER-QUALITY RECORDS

PERIOD OF RECORD.--July 1989 to current year.

PERIOD OF DAILY RECORD.--

WATER TEMPERATURES: May 19 to September 1998, March to September 1999 (discontinued).

SPECIFIC CONDUCTANCE: March 4 to September 30 1999.

INSTRUMENTATION.--Water quality data logger from March to September 1999.

EXTREMES FOR PERIOD OF DAILY RECORD.--

WATER TEMPERATURES: Maximum, 23.7 oC July 27, 1998.

EXTREMES FOR CURRENT PERIOD.--

WATER TEMPERATURES: Maximum, 21.7 oC Aug. 3.

SPECIFIC CONDUCTANCE: Maximum daily mean, 327 microsiemens, Sep. 27, 1999, minimum daily mean,

47 microsiemens May 25, 1999.

WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

DIS- PH OXYGEN, COLI- STREPCHARGE, SPE- WATER DIS- FORM, TOCOCCI

INST. CIFIC WHOLE SOLVED FECAL, FECAL,

CUBIC CON- FIELD TEMPER- TEMPER- TUR- OXYGEN, (PER- 0.7 KF AGAR

FEET DUCT- (STAND- ATURE ATURE BID- DIS- CENT UM-MF (COLS. 

DATE TIME PER ANCE ARD AIR WATER ITY SOLVED SATUR- (COLS./ PER

SECOND (US/CM) UNITS) (DEG C) (DEG C) (NTU) (MG/L) ATION) 100 ML) 100 ML)

(00061) (00095) (00400) (00020) (00010) (00076) (00300) (00301) (31625) (31673)

OCT

26... 1015 98 252 7.1 11.5 10.0 -- -- -- -- --

NOV

17... 1250 164 268 7.2 6.0 7.0 -- -- -- -- --

DEC

30... 1445 1200 105 7.4 4.0 3.0 -- -- -- -- --

FEB

08... 1500 527 140 7.0 2.0 5.0 -- -- -- -- --

MAR

09... 0925 440 144 7.2 8.0 3.5 -- -- -- -- --

APR

13... 0730 610 147 7.2 6.0 4.1 1.3 11.8 97 K2 K8

MAY

06... 1330 1160 95 7.3 18.0 8.8 1.8 11.8 111 <1 K6

JUN

02... 0745 2160 56 6.2 13.5 7.0 4.0 -- -- K5 28

JUL

15... 1200 508 109 7.1 24.0 13.0 2.0 10.2 106 K1 K4

AUG

09... 1415 237 176 7.3 30.0 19.0 .65 7.7 91 K3 K3

SEP

07... 1430 140 305 7.2 18.0 14.5 .44 10.8 113 <1 K16

ANC ANC ANC

HARD- MAGNE- POTAS- WATER UNFLTRD WATER CHLONESS CALCIUM SIUM, SODIUM, SIUM, UNFLTRD CARB UNFLTRD SULFATE RIDE, 

TOTAL DIS- DIS- DIS- DIS- FET FET FET DIS- DIS-

(MG/L SOLVED SOLVED SOLVED SOLVED FIELD FIELD FIELD SOLVED SOLVED

DATE AS (MG/L (MG/L (MG/L SODIUM (MG/L MG/L AS MG/L AS MG/L AS (MG/L (MG/L 

CACO3) AS CA) AS MG) AS NA) PERCENT AS K) HCO3 CO3 CACO3 AS SO4) AS CL)

(00900) (00915) (00925) (00930) (00932) (00935) (00440) (00445) (00410) (00945) (00940)

OCT

26... 90 23 7.7 -- -- -- -- -- -- -- --

NOV

17... 96 25 8.3 -- -- -- -- -- -- -- --

DEC

30... 36 10 2.7 -- -- -- -- -- -- -- --

FEB

08... 51 13 4.3 -- -- -- -- -- -- -- --

MAR

09... 54 14 4.6 -- -- -- -- -- -- -- --

APR

13... 53 14 4.4 -- -- -- -- -- -- -- --

MAY

06... 35 9.3 2.9 2.4 -- -- 27 0 22 18 2.2

JUN

02... 22 5.9 1.6 1.3 -- -- 16 0 14 9.4 .54 

JUL

15... 41 11 3.3 2.5 -- -- -- -- 25 21 1.1

AUG

09... 64 17 5.3 5.3 -- -- -- -- 32 42 2.5

SEP

07... 120 32 10 6.5 10 1.4 39 0 32 100 2.3

K Results based on counts outside ideal colony range.
38

SPOKANE RIVER BASIN

112413470 SOUTH FORK COEUR D’ALENE RIVER NEAR PINEHURST, ID--Continued

WATER-QUALITY DATA,WATERYEAR OCTOBER 1998 TO SEPTEMBER 1999

SOLIDS, NITRO- NITRO- NITRO- PHOSFLUO- SILICA, SUM OF SOLIDS, SOLIDS, GEN, GEN, GEN,AM- PHORUS 

RIDE, DIS- CONSTI- DIS- DIS- NO2+NO3 AMMONIA MONIA + PHOS- ORTHO,

DIS- SOLVED TUENTS, SOLVED SOLVED DIS- DIS- ORGANIC PHORUS DISSOLVED (MG/L DIS- (TONS (TONS SOLVED SOLVED TOTAL TOTAL SOLVED 

DATE (MG/L AS SOLVED PER PER (MG/L (MG/L (MG/L (MG/L (MG/L

AS F) SIO2) (MG/L) AC-FT) DAY) AS N) AS N) AS N) AS P) AS P)

(00950) (00955) (70301) (70303) (70302) (00631) (00608) (00625) (00665) (00671)

OCT

26... -- -- -- -- -- .348 .348 .50 .095 .035

NOV

17... -- -- -- -- -- .363 .310 .42 .048 .019

DEC

30... -- -- -- -- -- .176 .061 .16 .041 .009

FEB

08... -- -- -- -- -- .211 .068 .11 .025 .010

MAR

09... -- -- -- -- -- .203 .061 .23 .024 .008

APR

13... -- -- -- -- -- .139 .047 E.06 .018 .006

MAY

06... <.10 9.5 -- -- -- .061 .036 E.08 .016 .006

JUN

02... <.10 7.3 -- -- -- .035 .013 .12 .023 .004

JUL

15... .10 8.5 -- -- -- .044 .052 E.09 .021 .007

AUG

09... .20 10 -- -- -- .178 .119 .16 .040 .011

SEP

07... .29 11 186 .25 70.3 .252 .228 .33 .050 .016

SEDICADMIUM LEAD, ZINC, MENT, 

CADMIUM WATER LEAD, TOTAL ZINC, TOTAL SEDI- DISDIS- UNFLTRD DIS- RECOV- DIS- RECOV- MENT, CHARGE,

SOLVED TOTAL SOLVED ERABLE SOLVED ERABLE SUS- SUSDATE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L PENDED PENDED

AS CD) AS CD) AS PB) AS PB) AS ZN) AS ZN) (MG/L) (T/DAY)

(01025) (01027) (01049) (01051) (01090) (01092) (80154) (80155)

OCT

26... 1015 11 14 14 150 2130 2300 -- --

NOV

17... 1250 15 16 5.7 63 1910 2000 -- --

DEC

30... 1445 4.9 6 2.7 200 661 700 -- --

FEB

08... 1500 11 11 3.3 16 1180 1300 -- --

MAR

09... 0925 8.7 9 5.1 15 1310 1200 -- --

APR

13... 0730 6.2 7 3.6 21 979 950 3 4.9

MAY

06... 1330 3.8 4 5.0 44 601 590 7 22

JUN

02... 0745 2.1 3 3.6 130 317 360 31 181

JUL

15... 1200 4.2 5 6.7 29 714 660 3 4.1

AUG

09... 1415 7.4 8 7.9 26 1210 1100 2 1.3

SEP

07... 1430 7.5 8 4.5 19 1340 1400 1 .38 

E Positive detection but below stated detection limit.
39

SPOKANE RIVER BASIN

12413000 NORTH FORK COEUR D’ALENE RIVER AT ENAVILLE, ID

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1972-73, 1975-1980, 1990, October 1992 to current year.

PERIOD OF DAILY RECORD.--

WATER TEMPERATURES: May 20 to September 30, 1998, May to September 1999 (discontinued).

INSTRUMENTATION.--Temperature recording data logger.

EXTREMES FOR PERIOD OF DAILY RECORD.--

WATER TEMPERATURES: Maximum 21.9 oC July 27, 1998.

EXTREMES FOR CURRENT PERIOD.--

WATER TEMPERATURES: Maximum 20.2 oC Aug. 3.

WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

DIS- PH OXYGEN, COLICHARGE, SPE- WATER DIS- FORM, 

INST. CIFIC WHOLE SOLVED FECAL,

CUBIC CON- FIELD TEMPER- TEMPER- TUR- OXYGEN, (PER- 0.7

FEET DUCT- (STAND- ATURE ATURE BID- DIS- CENT UM-MF 

DATE TIME PER ANCE ARD AIR WATER ITY SOLVED SATUR- COLS./

SECOND (US/CM) UNITS) (DEG C) (DEG C) (NTU) (MG/L) ATION) 100 ML)

(00061) (00095) (00400) (00020) (00010) (00076) (00300) (00301) (31625)

OCT

20... 1530 254 50 7.5 12.5 10.5 -- -- -- --

NOV

17... 0900 592 53 7.0 3.5 6.0 -- -- -- --

DEC

15... 0800 1940 40 7.2 .0 3.2 -- -- -- --

JAN

27... 1130 1840 40 7.3 -2.0 1.5 -- -- -- --

FEB

08... 1255 1540 41 7.2 9.0 3.0 -- -- -- --

MAR

08... 1445 1940 41 7.4 5.0 3.0 -- -- -- --

APR

13... 1030 2740 44 7.3 10.5 3.9 1.2 12.2 101 <1

20... 1120 9680 30 7.2 13.0 5.0 -- -- -- --

MAY

06... 1010 5180 35 7.2 11.0 4.9 2.0 12.0 103 K1

27... 1430 8450 27 7.3 24.5 8.5 -- -- -- --

JUN

02... 1015 5810 32 7.3 19.0 8.1 1.9 -- -- K1

JUL

13... 0740 902 45 7.5 15.5 13.9 1.9 8.9 94 K7

AUG

10... 0745 504 51 7.2 17.0 15.3 .36 8.3 90 K5

SEP

08... 1245 306 53 7.8 21.5 13.0 .22 9.6 100 K1

STREP- ANC ANC ANC

TOCOCCI HARD- MAGNE- POTAS- WATER UNFLTRD WATER 

FECAL, NESS CALCIUM SIUM, SODIUM, SIUM, UNFLTRD CARB UNFLTRD

KF AGAR TOTAL DIS- DIS- DIS- DIS- FET FET FET

(COLS. (MG/L SOLVED SOLVED SOLVED SOLVED FIELD FIELD FIELD 

DATE PER AS (MG/L (MG/L (MG/L SODIUM (MG/L MG/L AS MG/L AS MG/L AS

100 ML) CACO3) AS CA) AS MG) AS NA) PERCENT AS K) HCO3 CO3 CACO3 

(31673) (00900) (00915) (00925) (00930) (00932) (00935) (00440) (00445) (00410)

OCT

20... -- 23 5.6 2.2 -- -- -- -- -- --

NOV

17... -- 23 5.7 2.2 -- -- -- -- -- --

DEC

15... -- 19 4.5 1.8 -- -- -- -- -- --

JAN

27... -- 18 4.3 1.7 -- -- -- -- -- --

FEB

08... -- 19 4.6 1.8 -- -- -- -- -- --

MAR

08... -- 18 4.3 1.7 -- -- -- -- -- --

APR

13... K4 17 4.2 1.7 -- -- -- -- -- --

20... -- 13 3.1 1.2 -- -- -- -- -- --

MAY

06... K1 14 3.4 1.4 .93 -- -- 19 0 16

27... -- 12 2.9 1.1 -- -- -- -- -- --

JUN

02... K1 13 3.1 1.2 .85 -- -- 17 0 14

JUL

13... 28 19 4.7 1.8 1.0 -- -- 25 0 21

AUG

10... K9 22 5.3 2.0 1.1 -- -- 29 0 24

SEP

08... K5 23 5.5 2.1 1.2 10 .44 29 0 24

K Results based on counts outside ideal colony range.
40

SPOKANE RIVER BASIN

12413000 NORTH FORK COEUR D’ALENE RIVER AT ENAVILLE, ID--Continued

WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

NITRO- NITRO- NITRO- PHOSCHLO- FLUO- SILICA, GEN, GEN, GEN,AM- PHORUS 

SULFATE RIDE, RIDE, DIS- NO2+NO3 AMMONIA MONIA + PHOS- ORTHO,

DIS- DIS- DIS- SOLVED DIS- DIS- ORGANIC PHORUS DISSOLVED SOLVED SOLVED (MG/L SOLVED SOLVED TOTAL TOTAL SOLVED 

DATE (MG/L (MG/L (MG/L AS (MG/L (MG/L (MG/L (MG/L (MG/L

AS SO4) AS CL) AS F) SIO2) AS N) AS N) AS N) AS P) AS P)

(00945) (00940) (00950) (00955) (00631) (00608) (00625) (00665) (00671)

OCT

20... -- -- -- -- .013 <.002 <.10 .002 .001 

NOV

17... -- -- -- -- .059 <.002 <.10 .004 .001 

DEC

15... -- -- -- -- .042 <.002 .10 .007 .003 

JAN

27... -- -- -- -- .024 .004 E.06 .005 .003 

FEB

08... -- -- -- -- .013 <.002 <.10 .004 .003 

MAR

08... -- -- -- -- .005 <.002 <.10 <.004 .001 

APR

13... -- -- -- -- .005 .004 <.10 .005 .002 

20... -- -- -- -- -- -- -- -- --

MAY

06... 1.5 .19 <.10 9.7 .008 .002 E.05 .008 .003 

27... -- -- -- -- -- -- -- -- --

JUN

02... 1.6 .38 <.10 8.7 .017 .003 .13 .007 .003 

JUL

13... 1.2 .14 <.10 10 <.005 <.002 <.10 .004 .002 

AUG

10... 1.3 .18 <.10 10 <.005 <.002 <.10 <.004 .001 

SEP

08... 1.7 E.15 <.10 10 .005 .007 .11 <.004 .003 

SEDICADMIUM LEAD, ZINC, MENT, 

CADMIUM WATER LEAD, TOTAL ZINC, TOTAL SEDI- DISDIS- UNFLTRD DIS- RECOV- DIS- RECOV- MENT, CHARGE,

SOLVED TOTAL SOLVED ERABLE SOLVED ERABLE SUS- SUSDATE TIME (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L PENDED PENDED

AS CD) AS CD) AS PB) AS PB) AS ZN) AS ZN) (MG/L) (T/DAY)

(01025) (01027) (01049) (01051) (01090) (01092) (80154) (80155)

OCT

20... 1530 <1 <1 <1 <1 <20 <10 -- --

NOV

17... 0900 <1 <1 <1 <1 E8 <10 -- --

DEC

15... 0800 <1 <1 <1 <1 <20 <10 -- --

JAN

27... 1130 <1 <1 <1 <1 <20 <10 -- --

FEB

08... 1255 <1 <1 <1 <1 <20 <10 -- --

MAR

08... 1445 <1 <1 <1 <1 <20 <40 -- --

APR

13... 1030 <1 <1 <1 <1 <20 <40 2 15

20... 1120 <1 <1 <1 3 <20 <40 37 967

MAY

06... 1010 <1 <.1 <1 .78 4 6.9 3 42

27... 1430 <1 <.1 <1 2.2 4 -- -- --

JUN

02... 1015 <1 <.1 <1 .67 4 4.4 5 78

JUL

13... 0740 <1 <.1 <1 .17 5 4.8 <1 --

AUG

10... 0745 <1 <.1 <1 .14 3 3.2 22 30

SEP

08... 1245 <1 <.1 <1 .10 3 2.4 <1 --

E Positive detection, but below stated deteciton limit.
41

ANALYSES OF SAMPLES COLLECTED AT WATER QUALITY PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES

Water quality partial-record stations and miscellaneous sites are locations where chemical-quality, biological,

or sediment data are collected once only, intermittently, or systematically but at limited frequency over a period of

years for use in hydrologic analyses.

WATER QUALITY DATA, MAY TO JUNE 1999

DIS- PH ANC

CHARGE, SPE- WATER HARD- MAGNE- WATER 

INST. CIFIC WHOLE NESS CALCIUM SIUM, SODIUM, UNFLTRD

CUBIC CON- FIELD TEMPER- TEMPER- TOTAL DIS- DIS- DIS- FET

FEET DUCT- (STAND- ATURE ATURE (MG/L SOLVED SOLVED SOLVED FIELD 

DATE TIME PER ANCE ARD AIR WATER AS (MG/L (MG/L (MG/L MG/L AS

SECOND (US/CM) UNITS) (DEG C) (DEG C) CACO3) AS CA) AS MG) AS NA) CACO3 

(00061) (00095) (00400) (00020) (00010) (00900) (00915) (00925) (00930) (00410)

SPOKANE RIVER BASIN

12411950 BEAVER CR AB CARPENTER GULCH NR PRICHARD, ID (LAT 47 37 59N LONG 115 58 46W)

MAY

24... 0920 140 49.0 7.06 16.0 8.00 21 5.5 1.7 1.2 14

12413025 LITTLE NORTH FORK AT HALE FISH HATCHERY AB MOUTH, ID (LAT 47 27 54N LONG 115 43 18W)

MAY 

22... 1030 47 19.0 6.90 16.5 5.00 7 1.7 .68 .9 7

12413030 SF COEUR D ALENE R BL OBRIEN GULCH NR LARSON, ID (LAT 47 28 00N LONG 115 43 58W)

MAY 

22... 1355 110 33.0 7.11 18.0 7.50 13 3.4 1.0 1.3 11

25... 1750 154 26.0 7.30 22.5 6.30 8 2.3 .67 .9 10

12413103 SF COEUR D ALENE R AB SLAUGHTERHSE GULCH AT MULLAN, ID (LAT 47 27 58N LONG 115 48 48W)

MAY

24... 1450 470 43.0 7.80 26.4 7.30 18 5.2 1.3 1.0 20

12413104 SF COEUR D ALENE R BL TROWBRIDGE GULCH NR WALLACE, ID (LAT 47 28 27N LONG 115 52 07W)

MAY

24... 1600 470 55.0 7.70 25.3 7.80 23 6.3 1.8 1.1 23

12413120 CANYON CREEK AT GEM, ID (LAT 47 30 30N LONG 115 52 01W)

MAY

24... 1100 310 27.0 6.66 23.5 6.20 10 2.7 .68 .7 10

12413126 NINEMILE CR AB MOUTH OF EF NINEMILE CR NR BLACKCLOUD, ID (LAT 47 30 51N LONG 115 53 52W)

MAY

23... 1120 5.6 180 8.01 22.5 8.80 95 23 9.4 1.1 88

124131267 EF NINEMILE CREEK NR BLACKCLOUD, ID (LAT 47 31 27N LONG 115 52 49W)

MAY

23... 0810 38 35.0 6.34 9.50 4.50 10 3.2 .53 1.4 6

12413131 SF COEUR D ALENE R ABV PLACER CR AT WALLACE, ID (LAT 47 28 30N LONG 115 55 39W) 

MAY

24... 1300 1200 52.0 7.60 20.0 8.10 21 5.8 1.6 1.1 21

12413151 LAKE CREEK AB MOUTH NR SILVERTON, ID (LAT 47 29 24N LONG 115 57 06W)

MAY

22... 0950 30 64.0 7.83 15.0 7.00 27 7.0 2.3 1.9 22

12413168 TWOMILE CREEK AB MOUTH AT OSBURN, ID (LAT 47 30 35N LONG 115 59 43W)

MAY

22... 1145 4.8 58.0 7.18 20.5 11.5 23 6.9 1.4 1.6 16

12413169 SF COEUR D ALENE R BLW TWOMILE CR NR OSBURN, ID (LAT 47 30 36N LONG 115 59 47W) 

MAY

05... 1610 533 -- -- -- -- 38 10 3.0 2.0 --

24... 1210 1400 53.0 7.27 28.0 8.70 22 6.2 1.7 -- 21

26... 1030 1800 47.0 6.88 18.0 8.50 19 5.2 1.4 .9 21

27... 1200 1400 48.0 7.47 24.5 7.80 22 6.0 1.6 -- --

JUN

01... 1215 1000 56.0 7.52 16.5 7.20 23 6.4 1.8 -- --

12413174 TERROR GULCH CREEK AB MOUTH NR OSBURN, ID (LAT 47 30 52N LONG 116 01 17W)

MAY

22... 1355 1.0 95.0 7.33 23.0 14.5 35 7.4 3.9 3.2 19

12413175 SF COEUR D ALENE R AT TERROR GULCH AT OSBURN, ID (LAT 47 30 52N LONG 116 01 20W)

MAY

24... 1425 1500 54.0 7.51 31.0 9.50 22 6.2 1.7 1.0 22

3412413179 SF COEUR D ALENE R AB BIG CREEK NR BIG CREEK, ID (LAT 47 31 38N LONG 116 02 56W)

MAY

24... 1640 1700 55.0 7.60 31.5 10.5 23 6.3 1.7 1.0 22
42

ANALYSES OF SAMPLES COLLECTED AT WATER QUALITY PARTIAL-RECORD STATIONS AND MISCELLANEOUS SITES

WATER QUALITY DATA, MAY TO JUNE 1999

CHLO- FLUO- SILICA, CADMIUM LEAD, ZINC, 

SULFATE RIDE, RIDE, DIS- CADMIUM WATER LEAD, TOTAL ZINC, TOTAL 

DIS- DIS- DIS- SOLVED DIS- UNFLTRD DIS- RECOV- DIS- RECOVSOLVED SOLVED SOLVED (MG/L SOLVED TOTAL SOLVED ERABLE SOLVED ERABLE

DATE (MG/L (MG/L (MG/L AS (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L 

AS SO4) AS CL) AS F) SIO2) AS CD) AS CD) AS PB) AS PB) AS ZN) AS ZN)

(00945) (00940) (00950) (00955) (01025) (01027) (01049) (01051) (01090) (01092)

SPOKANE RIVER BASIN

12411950 BEAVER CR AB CARPENTER GULCH NR PRICHARD, ID (LAT 47 37 59N LONG 115 58 46W)

MAY

24... 6.4 .3 <.1 11 <1 .31 <1 4.4 59 69.3 

12413025 LITTLE NORTH FORK AT HALE FISH HATCHERY AB MOUTH, ID (LAT 47 27 54N LONG 115 43 18W)

MAY

22... 1.7 .1 <.1 7.2 <1 <.1 <1 .20 1 <1.0 

12413030 SF COEUR D ALENE R BL OBRIEN GULCH NR LARSON, ID (LAT 47 28 00N LONG 115 43 58W)

MAY

22... 1.7 1.3 <.1 7.3 <1 <.1 <1 1.6 3 5.1 

25... 1.3 .7 <.1 6.7 <1 .14 <1 11.2 5 25.7 

12413103 SF COEUR D ALENE R AB SLAUGHTERHSE GULCH AT MULLAN, ID (LAT 47 27 58N LONG 115 48 48W)

MAY

24... 2.1 .8 <.1 6.2 <1 .31 <1 82.7 7 78.0 

12413104 SF COEUR D ALENE R BL TROWBRIDGE BULCH NR WALLACE, ID (LAT 47 28 27N LONG 115 52 07W)

MAY

24... 3.5 .8 <.1 6.3 <1 .88 <1 84.6 45 126

12413120 CANYON CREEK AT GEM, ID (LAT 47 30 30N LONG 115 52 01W)

MAY

24... 3.8 .5 <.1 6.5 3 3.9 14 477 340 481

12413126 NINEMILE CR AB MOUTH OF EF NINEMILE CR NR BLACKCLOUD, ID (LAT 47 30 51N LONG 115 53 52W)

MAY

23... .2 .4 <.1 12 <1 .17 1 2.5 22 22.3 

124131267 EF NINEMILE CREEK NR BLACKCLOUD, ID (LAT 47 31 27N LONG 115 52 49W)

MAY

23... 8.2 .2 <.1 11 8 10.5 25 619 1380 1730

12413131 SF COEUR D ALENE R ABV PLACER CR AT WALLACE, ID (LAT 47 28 30N LONG 115 55 39W) 

MAY

24... 4.7 .8 <.1 7.2 2 4.1 9 480 319 558

12413151 LAKE CREEK AB MOUTH NR SILVERTON, ID (LAT 47 29 24N LONG 115 57 06W)

MAY

22... 7.9 .9 <.1 7.6 <1 <.1 <1 4.4 10 6.2 

12413168 TWOMILE CREEK AB MOUTH AT OSBURN, ID (LAT 47 30 35N LONG 115 59 43W)

MAY

22... 9.3 .5 <.1 15 <1 <.1 <1 .31 2 1.5 

12413169 SF COEUR D ALENE R BLW TWOMILE CR NR OSBURN, ID (LAT 47 30 36N LONG 115 59 47W) 

MAY

05... 8.4 1.8 <.1 8.8 4 3.8 6 16.4 552 507

24... -- -- -- -- 2 3.6 5 376 250 501

26... 4.5 .5 <.1 <.1 2 3.9 4 500 222 629

27... -- -- -- -- 2 2.5 4 159 257 346

JUN

01... -- -- -- -- 2 2.1 6 38.9 267 284

12413174 TERROR GULCH CREEK AB MOUTH NR OSBURN, ID (LAT 47 30 52N LONG 116 01 17W)

MAY

22... 21 1.2 <.1 21 <1 <.1 <1 .47 23 23.6 

12413175 SF COEUR D ALENE R AT TERROR GULCH AT OSBURN, ID (LAT 47 30 52N LONG 116 01 20W)

MAY

24... 4.7 .7 <.1 7.1 2 3.9 6 477 251 534

12413179 SF COEUR D ALENE R AB BIG CREEK NR BIG CREEK, ID (LAT 47 31 38N LONG 116 02 56W)

MAY

24... 5.1 1.4 <.1 6.8 2 5.8 7 854 263 692
Woods, P.F. / Concentrations and Loads of Cadmium, Lead, and Zinc, 1999 Snowmelt Runoff, Nine Stations, Coeur d’Alene River