Mn 6 Fact Sheet

8/2/2019 Mn 6 Fact Sheet

http://slidepdf.com/reader/full/mn-6-fact-sheet 1/24



Assessment Point: MN-6

The following data are excerpts from multiple reports. While the same location in theMenomonee River watershed is represented, the assessment point IDs differ. Throughout

the following data, Assessment Point MN-6 is also represented by:

o Reach 834

o Nor-X-Way Channel



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B R O O K F I E L D B R O O K F I E L D

C i t y o f C i t y o f

M I L W A U K E E M I L W A U K E E


G L E N D A L E G L E N D A L E


C E D A R B UR G C E D A R B U R G

C it y of C it y o f

W AU W A T OS AW AU W AT OS A

C it y of Ci t y of

ME Q UO N M EQ UO N

UPPER MENOMONEE RIVER

LOW E R MENOMONEE RIV E R

LI T TLE MENO M O N E E RIVER

UNDERWOOD CREEK

LILLY CREEK

WILLO W C R E EK

BUTLER DITCH

NOR-X-WAY CHANNEL

DOUSMAN DITCH

WEST BR ANCH MENOMO N E E RIV E R

NORTH BRANCH MENOMONEE RIVER

LITTLE MENOMONEE CREEK


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M E Q U O N M E Q U O N




W A U W A T O S AW A U W A T O S A



UPPER MENOMONEE RIVER

LOW E R MENOMONEE RIV E R

LI T TLE MENO M O N E E RIVER

UNDERWOOD CREEK

LILLY CREEK

WILLO W C R E EK

BUTLER DITCH

NOR-X-WAY CHANNEL

DOUSMAN DITCH

WEST BR ANCH MENOMO N E E RIV E R

NORTH BRANCH MENOMONEE RIVER

LITTLE MENOMONEE CREEK



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M E Q U O N M E Q U O N




W A U W A T O S AW A U W A T O S A



MN-11

MN-9

MN-14

MN-2

MN-5

MN-15

MN-13

MN-4

MN-7

MN-8

MN-3

MN-6

MN-1

MN-10

MN-17

MN-12

MN-8 MN-9

MN-7

MN-6

MN-5

MN-4

MN-3 MN-2

MN-1

MN-16 MN-17

MN-15

MN-14

MN-13

MN-11

MN-12

MN-10



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Mequon Road

Main St BrownMN 6



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Mequon Road

Main St BrownMN 6



Constituent Measure Standard/Target

Geometric Mean Standard 200 counts/100 ml

Not to Exceed Standard 400 counts/100 ml

Dissolved Oxygen (DO) Minimum Concentration Standard 5 mg/l

Total Suspended Solids (TSS)

USGS Median TSS Reference Concentration (estimated

background concentration) 17.2 mg/l

Total Phosphorus (TP) Planning Guideline 0.1 mg/l

Flashiness

Richards Baker Flashiness Index (quantifies the frequencyand rapidity of short-term changes in stream flow; the index

ranges from 0 - 2, with 0 being constant flow) indicator only

Menomonee River Standards/Targets

Fecal Coliform





Figure Overall Project

Team Assessment

Analysis

Dissolved oxygenby flow

Good Note the decline in dissolved oxygen concentrations at low flows. This is likely due to a combination of decreased wateragitation and higher temperatures (low flow conditions are often associated with the warm summer months). This is

somewhat natural, but may be exacerbated by alterations in the stream and watershed (for example, a concrete-lined

channel).

Fecal coliform by

flow

Moderate to Poor Generally, a pollutant that is present at high concentrations during high flows and low concentrations during low flows

(fecal coliform, in this case) is attributed primarily to non-point sources. Note that during any period with the highest

flows, fecal coliform counts exceed the regulatory standard more than 75% of the time. During dry conditions and low

flows, the standard is met more than 75% of the time. This would be the safest time for any recreational uses (boating,

swimming, wading, etc.), although the amount of water in the stream may limit recreational use to wading.

Phosphorus by

flow

Good Concentrations of phosphorus are lowest at high and low flows. This suggests that the inputs are primarily non-point

sources that are activated during small storms, but that are diluted by heavy storms.

Suspended solids

by flow

Good The concentrations of suspended solids increase with increased flows, suggesting contributions from non-point sources.

The suspended solids may come from runoff that carries a sediment load, from stream bank erosion, or re-suspended

stream sediments.



Flashiness Index

Reach DescriptionRichards Baker Flashiness

Index

834 Nor-X-Way Channel 0.48

Average Daily Flow

Nor-X-Way Channel (834)

0

5

10

15

20

25

30

35

40

45

50

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

A V E R A

G E D A I L Y F L O W ( C F

S



Existing Water Quality Data

AssessmentPoint

Water QualityIndicator

Statistic ConditionExisting

Mean (cells per 100 ml) 3,261Fecal Coliform Bacteria(annual)

Percent compliance with single samplestandard (<400 cells per 100 ml)

72

MN-6Nor-X-Way

Channel

Geometric mean (cells per 100 ml) 208

Days of compliance with geometric meanstandard (<200 cells per 100 ml)

200

Mean (cells per 100 ml) 1,962Fecal Coliform Bacteria(May-September: 153days total) Percent compliance with single sample

standard (<400 cells per 100 ml)83

Geometric mean (cells per 100 ml) 113

Days of compliance with geometric meanstandard (<200 cells per 100 ml)

114

Dissolved Oxygen Mean (mg/l) 10.0

Median (mg/l) 9.9

Percent compliance with dissolved oxygenstandard (>5 mg/l)

100

Total Phosphorus Mean (mg/l) 0.056

Median (mg/l) 0.038

Percent compliance with recommendedphosphorus standard (0.1 mg/l)

90

Total Nitrogen Mean (mg/l) 0.75

Median (mg/l) 0.70

Total Suspended Solids Mean (mg/l) 16.0

Median (mg/l) 4.3

Copper Mean (mg/l) 0.0037

Median (mg/l) 0.0011



0

40

80

120

160

200

240

280

320

360

400

0 -1

1 -2

2 - 3

3 -4

4 - 5

5 - 6

6 -7

7 - 8

8 - 9

9 -1 0

> 1 0

Average DO (mg/L)

A v e r a g e N u

m b e r o f D a y s P e r Y e a r

Menomonee River @ Nor-X-Way Channel (RI 834)




0

40

80

120

160

200

240

280

320

360

400

0 -4 0 0

4 0 0 - 6 0 0

6 0 0 -1 0 0 0

1 0 0 0 -2 0 0 0

2 0 0 0 - 3 0 0 0

3 0 0 0 -4 0 0 0

4 0 0 0 - 5 0 0 0

> 5 0 0 0

Average Fecal Coliform (#/100ml)

A v e r a g e N u m b e r o f D a y s P e r Y e a r



Menomonee River @ Nor-X-Way Channel (RI 834 )

0

40

80

120

160

200

240

280

320

360

400

0 - 0 . 0 5

0 . 0 5 - 0 .1

0 .1 - 0 .1 5

0 .1 5 - 0 .2

0 .2 - 0 .2 5

0 .2 5 - 0 . 3

0 . 3 - 0 . 3 5

0 . 3 5 - 0 .4

0 .4 - 0 .4 5

0 .4 5 - 0 . 5

> 0 . 5

Average TP (mg/L)

A v e r a

g e N u m b e r o f D a y s P e r Y e

a r




0

40

80

120

160

200

240

280

320

360

400

0 -2 5

2 5 - 5 0

5 0 -7 5

7 5 -1 0 0

1 0 0 -1 2 5

1 2 5 -1 5 0

1 5 0 -1 7 5

1 7 5 -2 0 0

>2 0 0

Average TSS (mg/L)

A v e r a g e N

u m b e r o f D a y s P e r Y e a r











1

10

100

0 10 20 30 40 50 60 70 80 90 100

Flow Duration Interval (%)

C o n c e n t r a

t i o n ( m g / L )

Flow Conditions Regulatory Standard (5 mg/L) Box & Whiskers

Nor-X-Way Channel – Reach 834Dissolved Oxygen

Modeled Flow Data

Dry C on d iti on s

Lo w F lo ws

M id - ra nge F lo ws

H ig h F lo ws

M o ist C on d iti on s



1.E+00

1.E+01

1.E+02

1.E+03

1.E+04

1.E+05

0 10 20 30 40 50 60 70 80 90 100


C o n c e n t r a t i o

n ( c f u / 1 0 0 m L )

Flow Conditions Regulatory Standard (400 cfu/100 mL) Box & Whiskers

Nor-X-Way Channel – Reach 834Fecal Coliform

Modeled Flow Data

D ry Con diti on s

Low F lows

M i d -ra n ge F lows

Hig h F lows

Mo ist C on diti ons



0.01

0.10

1.00

0 10 20 30 40 50 60 70 80 90 100


C o n c e n t r a

t i o n ( m g / L )

Flow Conditions Planning Standard (0.1 mg/L) Box & Whiskers

Nor-X-Way Channel – Reach 834Total Phosphorus

Modeled Flow Data

Dry C on d iti on s

Lo w F lo ws


H i g h F lo ws




1

10

100

1000

0 10 20 30 40 50 60 70 80 90 100


C o n c e n t r a

t i o n ( m g / L )

Flow Conditions Reference Concentration (17.2 mg/L) Box & Whiskers

Nor-X-Way Channel – Reach 834Total Suspended Solids

Modeled Flow Data

Dry C on d iti on s

Lo w F lo ws


H i g h F lo ws


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