mn 16 fact sheet
TRANSCRIPT
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Assessment Point: MN-16
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-16 is also represented by:
o Reach 914o Honey Creek
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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
C i t y o f C i t y o f
G L E N D A L E G L E N D A L E
City ofCity of
CEDA RBUR GCEDA RB URG
C it y ofC it y o f
WAU WA TOS AWAU WAT OS A
C it y ofCi ty of
ME QUO NM EQ UO N
UPPER MENOMONEE RIVER
LOWER MENOMONEE RIVER
LITTLEMENOMONEERIVER
UNDERWOOD CREEK
LILLY CREEK
WILLOWCREEK
BUTLER DITCH
NOR-X-WAY CHANNEL
DOUSMAN DITCH
WEST BRANCH MENOMONEERIVER
NORTH BRANCH MENOMONEE RIVER
LITTLE MENOMONEE CREEK
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C i t y o f C i t y o f
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 E Q U O N M E Q U O N
C i t y o f C i t y o f
MI L W A U K E E MI L W A U K E E
Ci ty o fCi ty o f
W A UWA T O SAWA UWA TOSA
C i t y o f C i t y o f
G L E N D A L E G L E N D A L E
UPPER MENOMONEE RIVER
LOWER MENOMONEE RIVER
LITTLEMENOMONEERIVER
UNDERWOOD CREEK
LILLY CREEK
WILLOWCREEK
BUTLER DITCH
NOR-X-WAY CHANNEL
DOUSMAN DITCH
WEST BRANCH MENOMONEERIVER
NORTH BRANCH MENOMONEE RIVER
LITTLE MENOMONEE CREEK
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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 E Q U O N M E Q U O N
C i t y o f C i t y o f
MI L W A U K E E MI L W A U K E E
Ci ty o fCi ty o f
W A UWA T O SAWA UWA TOSA
C i t y o f C i t y o f
G L E N D A L E G L E N D A L E
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-8MN-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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C i t y o f C i t y o f
W E S T A L L I S W E S T A L L I S
C i t y o f C i t y o f
G R E E N F I E L DG R E E N F I E L D
Greenfield Av.
Bluemound Rd.MN-16
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C i t y o f C i t y o f
W E S T A L L I S W E S T A L L I S
C i t y o f C i t y o f
G R E E N F I E L DG R E E N F I E L D
Greenfield Av.
Bluemound Rd.MN-16
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Constituent Measure Standard/Target
Variance Standard - Geomean not to exceed 1,000 counts/100 ml
Variance Standard - Less than 10% of all samples/month 2,000 counts/100 ml
Dissolved Oxygen (DO) Variance Standard - Minimum Concentration 2 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 - Variance Standards/Targets
Fecal Coliform
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Figure Overall Project
Team Assessment
Analysis
Dissolved oxygenby flow
Good Note that the dissolved oxygen concentration declines during low flows (though still well above the variance standard).This is likely due to a combination of decreased water agitation and higher temperatures (low flow conditions are oftenassociated with the warm summer months).
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. The infrequent sewer overflows (once every 2-5
years) would only contribute during the high flows when substantial non-point sources are already present. Note that
during any period with the highest flows, fecal coliform counts exceed the regulatory variance standard. During dry
conditions, the variance standard is met 75% of the time and during low flows, the standard is met consistently. This
would be the safest time for any recreational uses (boating, swimming, wading, etc.), although the amount of water in the
stream would most likely limit recreational uses to wading.
Phosphorus by
flow
Moderate Concentrations are greatest at high flows, with concentrations exceeding the 0.1 mg/l planning guideline nearly 75% ofthe time at the highest flows. This suggests phosphorus loads are originating primarily from non-point sources. The
similarities between the phosphorus and suspended solids data suggest that the phosphorus may be associated with
suspended sediment.
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. Note that this site is located downstream of some concrete-lined reaches within the watershed. As a
result, upstream activities such as stream bank erosion and re-suspension of stream sediments likely make less of a
contribution to suspended sediment loads at this site compared to sites that are situated downstream of natural reaches that
experience these activities.
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Flashiness Index
Reach Description Richards Baker Flashiness Index
914 Honey Creek 0.83
Average Daily Flow
Honey Creek (914)
0
20
40
60
80
100
120
140
160
180
200
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
AVERA
GEDAILYFLOW(CF
S
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Existing Water Quality Data
AssessmentPoint
Water QualityIndicator
Statistic ConditionExisting
Mean (cells per 100 ml) 9,286Fecal Coliform Bacteria(annual)
Percent compliance with single samplestandard (
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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
9-10
>10
Average DO (mg/L)
AverageNu
mberofDaysPerYear
Menomonee River @ Honey Creek (RI 914)
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Menomonee River @ Honey Creek (RI 914)
0
40
80
120
160
200
240
280
320
360
400
0-400
400-600
600-1000
1000-2000
2000-3000
3000-4000
4000-5000
>5000
Average Fecal Coliform (#/100ml)
AverageNumberofDaysPerYear
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Menomonee River @ Honey Creek (RI 914)
0
40
80
120
160
200
240
280
320
360
400
0-0.05
0.05-0.1
0.1-0.15
0.15-0.2
0.2-0.25
0.25-0.3
0.3-0.35
0.35-0.4
0.4-0.45
0.45-0.5
>0.5
Average TP (mg/L)
Avera
geNumberofDaysPerYe
ar
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Menomonee River @ Honey Creek (RI 914)
0
40
80
120
160
200
240
280
320
360
400
0-25
25-50
50-75
75-100
100-125
125-150
150-175
175-200
>200
Average TSS (mg/L)
AverageN
umberofDaysPerYear
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1
10
100
0 10 20 30 40 50 60 70 80 90 100
Flow Duration Interval (%)
Concentra
tion(mg/L)
Flow Conditions Special Variance Regulatory Standard (2 mg/L) Box & Whiskers
Honey Creek Reach 914Dissolved Oxygen
Modeled Flow Data
DryConditions
LowFlows
Mid-rangeFlows
HighFlows
MoistConditions
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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
Flow Duration Interval (%)
Concentratio
n(cfu/100mL)
Flow Conditions Special Variance (2000 cfu/100 mL) Box & Whiskers
Honey Creek Reach 914Fecal Coliform
Modeled Flow Data
DryConditions
LowFlows
Mid-rangeFlows
HighFlows
MoistConditions
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0.01
0.10
1.00
0 10 20 30 40 50 60 70 80 90 100
Flow Duration Interval (%)
Concentra
tion(mg/L)
Flow Conditions Planning Standard (0.1 mg/L) Box & Whiskers
Honey Creek Reach 914Total Phosphorus
Modeled Flow Data
DryConditions
LowFlows
Mid-rangeFlows
HighFlows
MoistConditions
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1
10
100
1000
0 10 20 30 40 50 60 70 80 90 100
Flow Duration Interval (%)
Concentra
tion(mg/L)
Flow Conditions Reference Concentration (17.2 mg/L) Box & Whiskers
Honey Creek Reach 914Total Suspended Solids
Modeled Flow Data
DryConditions
LowFlows
Mid-rangeFlows
HighFlows
MoistConditions