109 90

2.3 1.6

2.8 2.4

3.2 2.8

9.4 7.5

3.0

1.9

4.2 3.1

11

6.7

10

100

1,000

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

Flow-adjusted values, in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius) Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Point indicating start of water year 2000 or end of water year 2013

Flow-adjusted fitted trend 

Flow-adjusted concentration

109

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–1. Flow-adjusted fitted trends for selected water-quality constituents and properties for Boulder River above 

Kleinsmith Gulch (site 1, fig. 1, table 1), based on analysis of data collected during water years 1997–2013.
1,900 1,600

7,200 4,900

1,500 2,000

7,000

3,400

3,200

1,600

48,000

28,000

43,000 37,000

100

1,000

10,000

100

1,000

100,000

10,000

100

1,000

100,000

10,000

1,000

10,000

1,000,000

100,000

1,000

10,000

1,000,000

100,000

100

1,000

100,000

10,000

100

1,000

100,000

10,000

No data collected. Graph included as a placeholder to 

assist in comparison with other Appendix 3 figures.

Values (not flow adjusted), in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Concentration—Not flow adjusted Point indicating June 2003, April 2008, or end of water year 2013

Flow-adjusted fitted trend 1,900

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–2. Fitted trends (not flow adjusted) for selected water-quality constituents and properties for Bullion Mine adit 

(site 2, fig. 1, table 1), based on analysis of data collected during water years 1999–2013.
167

108

270

63

3,100

970

1.4

2.2

13

5.0

390

110

3,300

980

43

11

10

100

1,000

0.1

1

10

100

100

1,000

100,000

10,000

100

1,000

100,000

10,000

10

100

10,000

1,000

10

100

10,000

1,000

0.1

1

10

100

0.1

1

10

100

Flow-adjusted values, in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Point indicating start of water year 2000 or end of water year 2013

167

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Flow-adjusted fitted trend 

Flow-adjusted concentration

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–3. Flow-adjusted fitted trends for selected water-quality constituents and properties for Bullion Mine 

tributary at mouth (site 3, fig. 1, table 1), based on analysis of data collected during water years 1997–2013.
79 76

26

11

310

170

4.1 3.8

5.6

1.9

44

16

350

170

13

6.7

10

100

1,000

0.1

1

10

100

1

10

1,000

100

1

10

1,000

100

10

100

10,000

1,000

10

100

10,000

1,000

0.1

1

10

100

0.1

1

10

100

Flow-adjusted values, in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Point indicating start of water year 2000 or end of water year 2013

79

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Flow-adjusted fitted trend 

Flow-adjusted concentration

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–4. Flow-adjusted fitted trends for selected water-quality constituents and properties for Jack Creek at 

mouth (site 4, fig. 1, table 1), based on analysis of data collected during water years 2000–13.
73 70

5.9 4.2

61

40

5.2 4.0

4.6 3.1

7.4

5.1

69

42

9.3

5.8

10

100

1,000

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

1

10

1,000

100

1

10

1,000

100

Flow-adjusted values, in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Point indicating start of water year 2000 or end of water year 2013

73

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Flow-adjusted fitted trend 

Flow-adjusted concentration

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–5. Flow-adjusted fitted trends for selected water-quality constituents and properties for Basin Creek at 

Basin (site 5, fig. 1, table 1), based on analysis of data collected during water years 1997–2013.
800 620

5,300 6,300

110 120

5,100 6,200

180

290

10

100

10,000

1,000

42,000 40,000 46,000 39,000

100

1,000

10,000

100

1,000

100,000

10,000

1,000

10,000

1,000,000

100,000

1,000

10,000

1,000,000

100,000

100

1,000

100,000

10,000

10

100

10,000

1,000

No data collected. Graph included as a placeholder to 

assist in comparison with other Appendix 3 figures.

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Values (not flow adjusted), in indicated units of measurement

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Concentration—Not flow adjusted Point indicating June 2003, April 2008, or end of water year 2013

Flow-adjusted fitted trend 800

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–6. Fitted trends (not flow adjusted) for selected water-quality constituents and properties for Crystal 

Mine adit (site 6, fig. 1, table 1), based on analysis of data collected during water years 2003–13.
3.9 4.5

41

85 79

5.4

49 42

2.4 2.4

2.7 2.0

6.1

52

2.9 3.0

10

100

1,000

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

1

10

1,000

100

1

10

1,000

100

Flow-adjusted values, in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Point indicating start of water year 2000 or end of water year 2013

Flow-adjusted fitted trend 85

Flow-adjusted concentration

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–7. Flow-adjusted fitted trends for selected water-quality constituents and properties for Cataract Creek 

above Uncle Sam Gulch (site 7, fig. 1, table 1), based on analysis of data collected during water years 1997–2013.
95 95

23

6.7

220

96

3.2 3.9

4.1 2.4

30

8.6

270

100

7.2 5.6

10

100

1,000

0.1

1

10

100

1

10

1,000

100

1

10

1,000

100

10

100

10,000

1,000

10

100

10,000

1,000

0.1

1

10

100

0.1

1

10

100

Flow-adjusted values, in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Point indicating start of water year 2000 or end of water year 2013

Flow-adjusted fitted trend 95

Flow-adjusted concentration

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–8. Flow-adjusted fitted trends for selected water-quality constituents and properties for Cataract 

Creek at Basin (site 8, fig. 1, table 1), based on analysis of data collected during water years 1997–2013.
280 233

4.3

2.2

820

420

17 23

15 12

8.8 5.7

1,000

560

45 41

100

1,000

10

100

10,000

1,000

10

100

10,000

1,000

0.1

1

10

100

0.1

1

10

100

1

10

1,000

100

1

10

1,000

100

1

10

1,000

100

1

1,000

Flow-adjusted values, in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Point indicating start of water year 2000 or end of water year 2013

280

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Flow-adjusted fitted trend 

Flow-adjusted concentration

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–9. Flow-adjusted fitted trends for selected water-quality constituents and properties for High Ore Creek 

near Basin (site 9, fig. 1, table 1), based on analysis of data collected during water years 1997–2013.
111 110

9.6

5.6

68

34

4.6 4.8

10

6.6

14

8.4

91

47

7.7 6.5

10

100

1,000

0.1

1

10

100

1

10

1,000

100

1

10

1,000

100

10

100

10,000

1,000

10

100

10,000

1,000

0.1

1

10

100

0.1

1

10

100

Flow-adjusted values, in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Point indicating start of water year 2000 or end of water year 2013

111

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Flow-adjusted fitted trend 

Flow-adjusted concentration

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–10. Flow-adjusted fitted trends for selected water-quality constituents and properties for Boulder River 

below Little Galena Gulch (site 10, fig. 1, table 1), based on analysis of data collected during water years 1997–2013.
52 53

4.8

2.9

160 160

3.4 4.7

4.8 3.4

5.8

3.4

180 160

6.1 6.2

10

100

1,000

10

100

10,000

1,000

10

100

10,000

1,000

0.1

1

10

100

0.1

1

10

100

0.1

1

100

0.1

1

10

100

0.1

1

10

100

Flow-adjusted values, in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Point indicating start of water year 2000 or end of water year 2013

52

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Flow-adjusted fitted trend 

Flow-adjusted concentration

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–11. Flow-adjusted fitted trends for selected water-quality constituents and properties for Tenmile Creek 

above City Diversion (site 11, fig. 1, table 1), based on analysis of data collected during water years 1999–2013.
63 58

7.2 5.1

250

140

2.7 2.6

3.5 3.1

9.4

5.7

270

140

3.2 3.3

10

100

1,000

10

100

10,000

1,000

10

100

10,000

1,000

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

Flow-adjusted values, in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Point indicating start of water year 2000 or end of water year 2013

63

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Flow-adjusted fitted trend 

Flow-adjusted concentration

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends;

p-value, statistical probability level]

Figure 3–12. Flow-adjusted fitted trends for selected water-quality constituents and properties for Minnehaha 

Creek near Rimini (site 12, fig. 1, table 1), based on analysis of data collected during water years 1997–2013.
96 96

3.6 4.2

170

290

15 17

5.2

1.6

5.1 5.9

180 290

22 21

10

100

1,000

10

100

10,000

1,000

10

100

10,000

1,000

0.1

1

10

100

0.1

1

10

100

0.1

1

10

100

1

10

1,000

100

1

10

1,000

100

Flow-adjusted values, in indicated units of measurement

Filtered copper (micrograms per liter)

Filtered zinc (micrograms per liter)

Filtered arsenic (micrograms per liter)

Unfiltered-recoverable copper (micrograms per liter)

Unfiltered-recoverable zinc (micrograms per liter)

Unfiltered-recoverable arsenic (micrograms per liter)

Suspended sediment (milligrams per liter)

Water year (October–September) Water year (October–September)

1995200020052010201319952000200520102013

Fitted trend value for indicated time—Bold values indicate 

statistical significance (p-value less than 0.01).

Point indicating start of water year 2000 or end of water year 2013

96

Specific conductance (microsiemens per centimeter 

at 25 degrees Celsius)

Flow-adjusted fitted trend 

Flow-adjusted concentration

EXPLANATION

[Water year is defined as the 12-month period from October 1 through September 30 and is designated by the year in which it ends; 

p-value, statistical probability level]

Figure 3–13. Flow-adjusted fitted trends for selected water-quality constituents and properties for Tenmile 

Creek near Rimini (site 13, fig. 1, table 1), based on analysis of data collected during water years 2005–13.