2.7.15. Hogan Creek

2.7.15.1. About Hogan Creek

Figure 2.47
Figure 2.48 The Hogan Creek Tributary (WBID 2252).
  • Downtown Jacksonville
  • Primary Land Use: Residential
  • Current TMDL reports: Fecal Coliform with BMAP (2009), Mercury
  • Verified Impaired 2016 (final): None
  • WBID Area: 3.4 sq. mi.
  • Beneficial Use: Class III F (Recreational – Freshwater)

2.7.15.2. Data sources

Result data were downloaded from the FL STORET and WIN websites (DEP 2010f; DEP 2018h) and filtered based on the stations (DEP 2010g) in the Hogan Creek WBID 2252 (DEP 2014c) shown above. The filtered dataset was used to generate Table 2.16.

2.7.15.3. Discussion

Water quality data for Hogan Creek are shown in Table 2.16.  No data were available in STORET for 2016, only two measurements were performed in 2017, and no metal data were available for 2018, limiting the utility of these measurements in assessing the water quality in Hogan Creek.  Historical average phosphorus levels were higher than the recently updated WQC (DEP 2015c; DEP 2016e; DEP 2016k), and the average phosphorus level in 2017 was near the WQC. Chlorophyll-a and dissolved oxygen concentrations appear to be within acceptable limits.

A TMDL for fecal coliform in Hogan Creek was finalized in 2006 (Wainwright 2006d). (Note: the data analyses in the TMDL are based on different criteria than that used in this report). Subsequently, a BMAP for Hogan Creek was legally adopted in December 2009 (DEP 2009b). Additional information about fecal coliform in the tributaries can be found in Section 2.6 and Table 2.2. The last Annual Progress Report for this BMAP was published in 2016 and listed 21 active, ongoing projects underway by FDOT and JEA and 2 projects completed in 2016 (pump station rebuilding by JEA, flood improvements by COJ)  to address the BMAP in the Hogan Creek watershed (DEP 2017c). FDEP reported improvement in the frequency of fecal coliform exceedances in the freshwater segment of Hogan Creek, but the last fecal coliform measurements in Hogan Creek available in STORET prior to 2018 date back mainly to 2008, with a single measurement in 2011.  Recent measurements suggest ongoing issues with fecal coliform concentrations.

In 2012, COJ worked with the US Army Corps of Engineers to investigate the potential to remediate and restore the aquatic ecosystem through removal of accumulated sediment, removal of exotic vegetation, and creation of wetland habitats.  Fourteen sites within the Hogan Creek watershed were under consideration for restoration, but sampling of ten of these sites in 2003 revealed hazardous, toxic, and radioactive waste contamination in both the creek itself and the adjacent lands.  Ash deposits dating back to the early 20th century can be found in the Hogan Creek watershed, and these are known sources of hazardous and toxic waste. Removal of these hazardous materials would prevent them from leaching into the creek and being taken up by plants and animals, but this (potentially extensive) work would need to be performed and paid for by either COJ or an organization contracted by COJ to do so.  The USACE elected not to proceed with any work or action until these hazardous materials were removed, after which the project could be reconsidered (USACE 2012a).

Historical water quality data for Hogan Creek are available in previous versions of the River Report.

Table 2.16 Water quality data for Hogan Creek.

 Water QualityAverage and Number of Samples º
ParameterCriteria (FW)201620172018
Dissolved Oxygen (mg/L)≥34% sat. (≥3.0)Not available3.75
(0 of 2 samples)
6.46
(0 of 43 samples)
Total Nitrogen (mg/L)<1.54Not available0.78
(0 of 2 samples)
0.97
(0 of 10 samples)
Total Phosphorus (mg/L)<0.12Not available0.11
(0 of 2 samples)
0.12
(4 of 12 samples)
Chlorophyll-a (µg/L)<20Not available8.15
(0 of 2 samples)
5.42
(1 of 12 samples)
Arsenic (µg/L)≤50Not available1.62
(0 of 2 samples)
Not available
Cadmium (µg/L)≤0.3Not available0.02
(0 of 2 samples)
Not available
Copper (µg/L)≤9.3Not available1.68
(0 of 2 samples)
Not available
Lead (µg/L)≤3.2Not available1.90
(0 of 2 samples)
Not available
Nickel (µg/L)≤52Not available0.46
(0 of 2 samples)
Not available
Silver (µg/L)≤0.07Not available0.01
(0 of 2 samples)
Not available
Zinc (µg/L)≤120Not available7.80
(0 of 2 samples)
Not available
Fecal Coliform (CFU/100 mL)<400Not availableNot available2400
(14 of 38 samples)
Turbidity (NTU)<29Not available4.60
(0 of 2 samples)
4.67
(0 of 12 samples)
Note: Hardness-dependent freshwater criteria for cadmium, copper, lead, nickel, and zinc were generated based on a hardness concentration of 100 mg/L.
° = Number of samples below Water Quality Criteria for Dissolved Oxygen; Number of samples above Water Quality Criteria for all other parameters.
FW = freshwater; SW = saltwater (marine). Values denoted with (*) indicate a proposed criterion, which has not yet been adopted.
Values denoted with (‡) are reference values based on EPA criteria (EPA 2010b), but the water body is not regulated by this standard.