Data Sources:
|
Data Source
|
Data Source ID
|
Data Type
|
Data Age
|
Site ID
|
Site Name
|
Site Description
|
|
Iowa DNR
|
6
|
WQ
|
CY 2010, CY 2012
|
11310005
|
White Point Hollow near Luxemburg
|
Site WPH1
|
|
Iowa DNR
|
6
|
WQ
|
CY 2010, CY 2012
|
11310006
|
White Point Hollow near Luxemburg
|
|
|
Iowa DNR
|
6
|
BIO
|
See Below
|
370
|
White Point Hollow
|
Luxemburg
|
|
Iowa DNR
|
6
|
BIO
|
See Below
|
407
|
White Point Hollow
|
Luxemburg (REMAP #58)
|
Presumptive Class A1 – Indicator Bacteria: 2010
|
Site ID
|
Data Source ID
|
# Samples / # Years
|
2010 Geometric Mean
|
Annual Geometric Mean Violation
|
# Violations
|
% Violations
|
Significantly >10% Violations
|
Assessment Type
|
Support Level
|
|
11310005
|
6
|
16 / 1
|
917
|
Yes
|
12
|
75%
|
Yes
|
Evaluated
|
Not
|
|
11310006
|
6
|
9 / 1
|
359
|
Yes
|
6
|
67%
|
Yes
|
Evaluated
|
Not
|
Class A2 - Indicator Bacteria: 2010
|
Site ID
|
Data Source ID
|
# Samples / # Years
|
2010 Geometric Mean
|
Annual Geometric Mean Violation
|
# Violations
|
% Violations
|
Significantly >10% Violations
|
Assessment Type
|
Support Level
|
|
11310005
|
6
|
17 / 1
|
991
|
Yes
|
6
|
35%
|
Yes
|
Evaluated
|
Not
|
|
11310006
|
6
|
10 / 1
|
461
|
No
|
2
|
20%
|
No
|
Evaluated
|
Full
|
Class BCW1 - Biological Sampling:
Benthic Macroinvertebrates:
|
BioNet Site ID
|
Date
|
Drainage Area (mi2)
|
Ecoregion
|
Major Drainage/Thermal
|
BM Sample Gear
|
CBI score
|
CBI Class
|
CBI BIT
|
CBI Pass/Fail
|
|
370
|
8/23/19
|
3.9
|
52b
|
MS/CW
|
Surber
|
41
|
NA
|
60
|
Fail
|
|
407
|
7/22/15
|
6.1
|
52b
|
MS/CW
|
Surber
|
51
|
NA
|
60
|
Fail
|
Overall Assessment:
|
Community
|
Assessment Type
|
Assessment Result
|
Support Level
|
IR Category
|
Reason
|
|
Benthic Macroinvertebrates
|
Evaluated
|
Fail (0/2)
|
Not
|
5bv
|
Assessment was evaluated because it included samples not
collected in the last five years.
|
Class BCW1- Fishkill Assessment:
The Class BCW1 aquatic life use assessment based on the 2017 fish kill
initially placed this segment in Category 4d. The fish kill was caused by a
“pollutant” or was suspected to be caused by a “pollutant”; therefore, the
Class BCW1 use was considered impaired. However, because restitution for the
fish killed was received, the Class BCW1 use was placed in Category 4d
(impaired but TMDL not required). DNR feels that (1) TMDLs should not be
required for a fish kill caused by a one-time illegal or unauthorized release
of a pollutant where enforcement action was taken and (2) enforcement action is
more appropriate and effective for addressing a spill-related impairment than
the TMDL process. Based in DNR IR methodology, the fish kill is now greater
than five years old (2022); therefore, this BCW1 fish kill assessment was moved
from Category 4d to Category 3b.
Details about the 2017 fish kill can be found here:
https://programs.iowadnr.gov/fishkill/Events/948
Class BCW1: Natural Trout Reproduction:
Based on the January 2024 summary of trout reproduction in Iowa streams prepared
by the DNR Fisheries Bureau, the Class BCW1 coldwater aquatic life use of White
Pine Hollow was assessed as "fully supported.” According to the updated
summary, this stream was placed in Category II: streams that exhibit recent but
inconsistent reproductive success and occasional stocking may be needed to
maintain the trout population.
Class BCW1 – Continuous DO Monitoring: 2019
|
Site ID
|
Data Source ID
|
# Days Monitoring (2019)
|
DO Criteria Type
|
# 2016 violations / Violations needed for impairment
|
Violates Annual Significantly >10% Rule?
|
Assessment Type
|
Support Level
|
|
|
|
24 hr
|
0/6
|
No
|
|
|
|
370
|
6
|
31
|
16 hr
|
0/6
|
No
|
Evaluated
|
Full
|
Class BCW1 - Continuous Temperature Monitoring: 2012
Continuous stream temperature monitoring data collected in 2012 for the DNR/SHL
coldwater stream sampling project at stations 11310006 and 11310005 were
examined for temperature criteria violations. At station 11310006, the maximum
stream temperature recorded during the sensor deployment period was 18.6
degrees (C). The BCW1 temperature criterion of 20 (C) was exceeded in 0 of 51
days. The percentage exceeding (0%) was less than (passing) the 10% impairment
threshold with high statistical confidence (>90%). At station 11310005, the
maximum daily temperature was 27.3 degrees (C). The BCW1 temperature criterion
of 20 (C) was exceeded in 78 of 111 days between 6/21/2012 and 10/9/2012. The
percentage exceeding (70%) was greater than (failing) the 10% impairment
threshold with high statistical confidence (>90%). Based on these data, the
BCW1 use is assessed as impaired for water temperature. The assessment type is
“evaluated” because it is based on data collected from a single year within the
current data assessment period. In order to meet the requirements for a
“monitored” assessment, the DNR’s continuous monitoring assessment methodology
requires monitoring data from two or more years within the assessment period.
The substantially different continuous monitoring results obtained from
stations 11310006 and 11310005 suggest that the stream temperature regime is
not consistent throughout the entire stream segment. Additional continuous
monitoring and an assessment of coldwater inputs (e.g., groundwater seeps and
springs) in the vicinity of the sampling sites might be needed to determine
whether the BCW1 use is the appropriate designated use for the entire segment
or just certain areas within the segment.
Class HH - No Data
