# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 1 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2278 Alafia River 1583 POLEY CREEK STREAM 3F Coliform Fecal Coliform ≤ 400 Counts / 100 mL 3c 5 5 Impaired High 19/39



### 09-2279 Alafia River 1592C MUSTANG RANCH CREEK STREAM 3F Dissolved Oxygen Total Nitrogen, Total Phosphorus Median TN = 3.04 (n = 28), Median TP = 0.72 (n = 28), Median

BOD = 1.2 (n = 17) ≥ 5.0 mg/L 3a 5 5 Impaired High 8/39 Changed name from English Creek to Mustang Ranch Creek



### 09-2280 Alafia River 1592C MUSTANG RANCH CREEK STREAM 3F Coliform Fecal Coliform ≤ 400 Counts / 100 mL 3c 5 5 Impaired High 6/6 Changed name from English Creek to Mustang Ranch Creek



### 09-2281 Alafia River 1592C MUSTANG RANCH CREEK STREAM 3F Nutrients Nutrients (Chlorophyll) Median TN = 3.04 (n = 28), Median TP = 0.72 (n = 28), Median

BOD = 1.2 (n = 17) ≤ 20 μg/L 3c 5 5 Impaired High 005 (1.07), 2007 (1.6 Annual chlorophyll-a average did not exceed the 20 ug/L threshold in 2005 (1.07 ug/L) and 2007 (1.6 ug/L). Nitrogen is the limiting nutrient based on a median TN/TP ratio of 4.4 (28 values). Changed name from English Creek to Mustang Ranch Creek. Nutrients (chl-a) impairment based on dissolved oxygen impairment and causative pollutants of total nitrogen and total phosphorus.



### 09-2282 Alafia River 1610 MINED AREA STREAM 3F Nutrients (Chlorophyll) Median TN = 1.85 (n = 32), Median TP =

0.57 (n = 30), No BOD data ≤ 20 μg/L 3b 5 5 Impaired Medium 2005 (66.97) Annual average Chl-a values exceeded 20 ug/l in 2005 and exceedance values were 66.97 ug/L. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 3.45 (30 values). Verified period median TN = 1.85 mg/L (n = 32), median TP = 0.57 mg/L (n = 30), and BOD median = No data.



### 09-2283 Alafia River 1621A ALAFIA RIVER ABOVE HILLSBORO UGH BAY STREAM 3F Fecal Coliform ≤ 400 Counts / 100 mL 2 5 5 Impaired Low 22/149

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 2 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2284 Alafia River 1621E ALAFIA RIVER (NORTH PRONG) STREAM 3F Nutrients Nutrients (Chlorophyll) Median TN = 2.07 (n = 156), Median TP = 5.65 (n = 156), Median BOD = 0.94 (n = 16) ≤ 20 μg/L 3c 5 5 Impaired High 2004 (2.9), 2005 (2.6), 2006 (3.0), 2007 (3.0) Annual average Chl-a values were 2.9, 2.6, 3.0, and 3.0 ug/L respectively from 2004-2007. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 0.44 (156 values). Listing based on dissolved oxygen and nutrient impairment.



### 09-2285 Alafia River 1621E ALAFIA RIVER (NORTH PRONG) STREAM 3F Un-ionized Ammonia ≤ 0.02 mg/L as NH3 3b 5 5 Impaired Medium 27/139 Ammonia may be inhibiting algal growth. pH is not impaired with minimum of 6.04 and maximum of 12.11.



### 09-2286 Alafia River 1621F LITHIA SPRINGS SPRING 3F Dissolved Oxygen Total Nitrogen Median TN = 2.9 (n = 33), Median TP = 0.06 (n = 33), BOD Median = 0.2 (n = 1) ≥ 5.0 mg/L 3b 5 5 Impaired Medium 24/35 Groundwater Report provides additional information on total nitrogen and dissolved oxygen impairment.



### 09-2287 Alafia River 1621G ALAFIA RIVER ABOVE HILLSBORO UGH BAY ESTUARY 3M Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 2 5 5 Impaired Low Verified Confirmed recent data (2002, 2003 and 2004) for coastal and associated estuary fish advisories for king mackerel (n=87) and bull shark (n=28). Average Hg levels were 0.67 mg/kg in king mackerel and 1.85 mg/kg in bull shark which exceeded the threshold of 0.3 mg/kg of mercury.*



### 09-2288 Alafia River 1635 BUCKHORN SPRING STREAM 3F Fecal Coliform ≤ 400 Counts / 100 mL 3a 5 5 Impaired Low 6/7



### 09-2289 Alafia River 1653 SOUTH PRONG ALAFIA RIVER STREAM 3F Dissolved Oxygen Total Phosphorus Median TN = 1.31 (n = 366), Median TP = 0.91 (n = 383), BOD

Median = 1.0 (n = 180). ≥ 5.0 mg/L 4c 5 5 Impaired Medium 88/388 There are a sufficient number of DO exceedances to place DO on the verified list. Impairment linked to total phosphorus as the causative pollutant.

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 3 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2290 Alafia River 1673 HOOKERS PRAIRIE STREAM 3F Dissolved Oxygen Total Phosphorus Median TN = 1.4 (n = 102), Median TP = 1.9 (n = 102), BOD Median = 2.0 (n = 3). ≥ 5.0 mg/L 3b 5 5 Impaired Medium 79/104 Impaired due to total phosphorus as causative pollutant.



### 09-2291 Alafia River 1673 HOOKERS PRAIRIE STREAM 3F Nutrients (Chlorophyll) Median TN = 1.4 (n = 102), Median TP = 1.9 (n = 102), BOD Median = 2.0 (n = 3). ≤ 20 μg/L 3b 5 5 Impaired Medium 2007 (21.78) Annual average Chl-a values exceeded 20 ug/l in 2007 and exceedance value is 21.78 ug/L. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 0.72 (102 values). Verified period Median TN = 1.4 (n = 102), Median TP = 1.9 (n = 102), BOD Median = 2.0 (n = 3).



### 09-2292 Hillsborough River 1402 CYPRESS CREEK STREAM 3F Dissolved Oxygen Dissolved Oxygen Total Nitrogen Median TN = 1.62 (n = 121), Median TP = 0.08 (n = 164), BOD

Median = 1.0 (n = 63). ≥ 5.0 mg/L 4c 5 5 Impaired Medium 165/172 EPA proposed a TMDL in September, 2004. Dissolved oxygen impairment linked to total nitrogen as the causative pollutant. Total nitrogen median in cycle 1 assessment was 1.3 mg/L, but has increased in the cycle 2 assessment to 1.62 mg/L.



### 09-2293 Hillsborough River 1402 CYPRESS CREEK STREAM 3F Coliform Fecal Coliform ≤ 400 Counts / 100 mL 2 5 5 Impaired Low 11/64 Delisted from the 1998303(d) list in Cycle 1, relisted in Cycle 2.



### 09-2294 Hillsborough River 1402 CYPRESS CREEK STREAM 3F Nutrients Nutrients (Chlorophyll) Median TN = 1.62 (n = 121), Median TP = 0.08 (n = 164), BOD

Median = 1.0 (n = 63). ≤ 20 μg/L 2 5 5 Impaired Medium 2004 (2.3), 2005 (2.6), 2007 (12.33) Delisted from the 1998303(d) list in Cycle 1, relisted in Cycle 2. Annual chlorophyll-a average did not exceed 20 ug/L in 2004 (2.3), 2005 (2.6), and 2007 (12.33). Nutrients (total ntirogen and total phosporus) are co-limiting based on a median TN/TP ratio of 22 (n=121).

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 4 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2295 Hillsborough River 1440E CYPRESS CREEK NORTH STREAM 3F Dissolved Oxygen Total Nitrogen, Total Phosphorus Median TN = 1.35 (n = 36), Median TP = 0.05 (n = 36), No BOD data ≥ 5.0 mg/L 3b 5 5 Impaired Medium 19/38



### 09-2296 Hillsborough River 1440E CYPRESS CREEK NORTH STREAM 3F Nutrients (Chlorophyll) Median TN = 1.35 (n = 36), Median TP = 0.05 (n = 36), No BOD data ≤ 20 μg/L 3b 5 5 Impaired Medium 2007 (274.9) Annual chlorophyll-a average exceeded 20 ug/Lin 2007 (274.9 ug/L). Colimitation of Nitrogen and phosphorus based on a median TN/TP ratio of 13.54 (36 values).



### 09-2297 Hillsborough River 1442 NEW RIVER STREAM 3F Dissolved Oxygen Dissolved Oxygen Total Nitrogen, Total Phosphorus Median TN = 2.08 (n = 18), Median TP =

0.35 (n = 19), No BOD data ≥ 5.0 mg/L 4c 5 5 Impaired High 20/24 EPA finalized a TMDL in December, 2005.



### 09-2298 Hillsborough River 1442 NEW RIVER STREAM 3F Nutrients Nutrients (Chlorophyll) ≤ 20 μg/L 2 5 5 Impaired High 2002 (4.7) Delisted from the 1998303(d) list in Cycle 1, relisted in Cycle 2. Nutrient impairment based on dissolved oxygen impairment and causative pollutant of total nitrogen and total phosphorus. Nitrogen is the limiting nutirent with TN/TP ratio 6.58 (n=18).

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 5 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2299 Hillsborough River 1443A HILLSBORO UGH RIVER STREAM 3F Nutrients Nutrients (Chlorophyll) Median TN = 1.4 (n = 97), Median TP =

0.09 (n = 115), Median BOD = 1.1 (n = 49) ≤ 20 μg/L 3c 5 5 Impaired High 2002 (3.75), 2005 (1.03) Annual chlorophyll-a average did not exceed 20 ug/L in 2002 (3.75) and 2005 (1.03 ug/L). Biological information is insufficient to assess aquatic life use support. Listed as impaired based on dissolved oxygen and nutrient (total nitrogen) impairment. Nitrogen is the limiting nutrient based on TN/TP ration of 5.7 (n = 82). Two stations have been included in the assessment of this WBID that were previously assigned to WBID 1443E, station 112WRD 02301990 and station 112WRD 02302010. These stations show elevated total nitrogen values in the verified period. The stations will be re-assigned to WBID 1443A in a later IWR Run, but the data has been used to verify the dissolved oxygen and nutrient impairment.



### 09-2300 Hillsborough River 1443B HILLSBORO UGH RIVER STREAM 1 Dissolved Oxygen Dissolved Oxygen Total Phosphorus Median TN = 1.29 (n = 75), Median TP = 0.2 (n = 90), BOD Median = 1.4 (n = 45). ≥ 5.0 mg/L 4c 5 5 Impaired High 50/94 EPA proposed a TMDL in September, 2004.

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 6 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2301 Hillsborough River 1443E1 HILLSBORO UGH RESERVOIR LAKE 1 Nutrients (TSI) Median TN = 1.04 (n = 345), Median TP = 0.22 (n = 349), BOD

Median = 1.0 (n = 177). TSI <60; Color > 40 2 5 5 Impaired Medium 2001 (48.6, 82.9), 2002 (47, 117), 2003 (40.3, 40.3), 2004 (38.9, 95), 2005 (42.8, 73.3), 2006 (42.7, 61.4), 2007 (48.4, 62.9) Impaired due to dissolved oxygen impairment and nutrients (total phosphorus) as causative pollutant. Annual average TSI values did not exceed 60 TSI units in 2001 (48.6) 2002 (47), 2003 (40.3), 2004 (38.9), 2005 (42.8), 2006 (42.7), and 2007 (48.4). Nitrogen is the limiting nutrient based on a median TN/TP ratio of 8.6 (36 values).



### 09-2302 Hillsborough River 1451G KING LAKE - OPEN WATER LAKE 3F Nutrients (TSI) Median TN = 1.47 (n = 11), Median TP = 0.02 (n = 11), No BOD data. TSI <40; Color <40 2 5 5 Impaired Medium 007 (42.4, 24.2 PCUAnnual average TSI values exceeded 40 TSI units with color less than 40 PCU in 2007. Phosphorus is the limiting nutrient based on a median TN/TP ratio of 63.35 (11 values).



### 09-2303 Hillsborough River 1451W SAXON LAKE LAKE 3F Nutrients (TSI) Median TN = 1.03 (n = 11), Median TP = 0.03 (n = 11), No BOD data. TSI <40; Color <40 2 5 5 Impaired Medium 2007 (43.2, 28.3 PCUAnnual average TSI values exceeded 40 TSI units with color less than 40 PCU in 2007. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 36.83 (11 values).



### 09-2304 Hillsborough River 1455 TROUT CREEK STREAM 3F Dissolved Oxygen Dissolved Oxygen Total Nitrogen Median TN = 1.08 (n = 94), Median TP = 0.12 (n = 110), BOD

Median = 1.1 (n = 60). ≥ 5.0 mg/L 3c 5 5 Impaired High 73/108 Impaired with total nitrogen as the causative pollutant.

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 7 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2305 Hillsborough River 1455 TROUT CREEK STREAM 3F Nutrients Nutrients (Chlorophyll) Median TN = 1.08 (n = 94), Median TP = 0.12 (n = 110), BOD

Median = 1.1 (n = 60). ≤ 20 μg/L 2 5 5 Impaired High 2002 (9.42), 2003 (3.92), 2004 (3.64), 2007 (20.87) Annual chlorophyll-a average exceeded 20 ug/l in 2007 (20.87 ug/L). Delisted from the 1998 303(d) list in Cycle 1. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 8.8 (93 values). Complete nutrient TMDL with dissolved oxygen TMDL. Biorecons completed in 2005 and 2006 with assessment "Suspect". Significant land use change from rangeland / pasture to urban residential.



### 09-2306 Hillsborough River 1462A CRYSTAL SPRINGS SPRING 3F Dissolved Oxygen Dissolved Oxygen Total Nitrogen Median TN = 2.5 (n = 4), TP Median = 0.04 (n = 20), BOD Median = 0.2 (n = 1) ≥ 5.0 mg/L 3c 5 5 Impaired High 17/18 Impairment linked to total nitrogen as the causative pollutant. This is a spring, but nutrients are elevated in this watershed.



### 09-2307 Hillsborough River 1469 BIG DITCH STREAM 3F Dissolved Oxygen Total Nitrogen, Total Phosphorus Median TN = 1.93 (n = 21), Median TP = 2.0 (n = 21), No BOD data ≥ 5.0 mg/L 3b 5 5 Impaired High 18/22 Complete Dissolved Oxygen TMDL with Nutrients (chl-a) TMDL.



### 09-2308 Hillsborough River 1469 BIG DITCH STREAM 3F Nutrients Nutrients (Chlorophyll) Median TN = 1.93 (n = 21), Median TP = 2.0 (n = 21), No BOD data ≤ 20 μg/L 3c 5 5 Impaired High 2005-06 (39.01) Nitrogen is the limiting nutrient based on a median TN/TP ratio of 0.96 (21 values). Chlorophyll-a annual mean calculated based on last two quarters of 2005 and first two quarters of 2006. Complete Nutrients (chl-a) TMDL with dissolved oxygen TMDL.



### 09-2309 Hillsborough River 1483 CHANNELIZ ED STREAM STREAM 3F Dissolved Oxygen Total Nitrogen, Total Phosphorus Median TN = 2.4 (n = 22), Median TP = 1.2

(n = 22), No BOD data ≥ 5.0 mg/L 3b 5 5 Impaired Medium 23/24

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 8 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2310 Hillsborough River 1483 CHANNELIZ ED STREAM STREAM 3F Nutrients Nutrients (Chlorophyll) Median TN = 2.4 (n = 22), Median TP = 1.2

(n = 22), No BOD data ≤ 20 μg/L 3c 5 5 Impaired High 2005 (37.43) Annual average Chl-a values exceeded 20 ug/l in 2005 and the exceedance value was 37.43 ug/L. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 2.10 (22 values). Verified period median TN = 2.42 mg/L (n = 22), median TP = 1.20 mg/L (n = 22), and no BOD data.



### 09-2311 Hillsborough River 1489 TWO HOLE BRANCH STREAM 3F Nutrients Nutrients (Chlorophyll) Median TN = 1.16 (n = 21), Median TP = 0.26 (n = 22), Median

BOD = 2.0 (n = 21) ≤ 20 μg/L 3c 5 5 Impaired High 2002 (3.05), 2005 (1.7) Annual chlorophyll-a average did not exceed 20 ug/L in 2002 (3.05 ug/L) and 2005 (1.7 ug/L). Nitrogen is the limiting nutrient based on a median TN/TP ratio of 3.96 (21 values). This WBID was listed as impaired for dissolved oxygen in Cycle 1 and total phosphorus is the causative pollutant for dissolved oxygen in Cycle 2. There is no biological information available.



### 09-2312 Hillsborough River 1495A ITCHEPACK ASASSA CREEK STREAM 3F Fecal Coliform ≤ 400 Counts / 100 mL 3b 5 5 Impaired Low 12/16



### 09-2313 Hillsborough River 1495B ITCHEPACK ASASSA CREEK STREAM 3F Dissolved Oxygen Dissolved Oxygen Total Phosphorus Median TN = 1.55 (n = 88), Median TP = 0.58 (n = 90), Median

BOD = 2.0 (n = 11) ≥ 5.0 mg/L 4c 5 5 Impaired High 30/104 EPA finalized a TMDL in December, 2005. Dissolved oxygen impairment linked to total phosphorus.

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 9 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2314 Hillsborough River 1495B ITCHEPACK ASASSA CREEK STREAM 3F Nutrients Nutrients (Chlorophyll) Median TN = 1.55 (n = 88), Median TP = 0.58 (n = 90), Median

BOD = 2.0 (n = 11) ≤ 20 μg/L 2 5 5 Impaired High 2005 (13.05), 2006 (2.7), 2007 (3.2) Delisted from the 1998303(d) list in Cycle 1, relisted in Cycle 2. Annual chlorophyll-a average did not exceed 20 ug/L in 2005 (13.05 ug/L), 2006 (2.7 ug/L) and 2007 (3.2 ug/L). Nitrogen is the limiting nutrient based on a median TN/TP ratio of 2.56 (88 values). 'EPA finalized a TMDL in December, 2005. Listing based on dissolved oxygen and nutrient (total phosphorus) impairment.



### 09-2315 Hillsborough River 1518 EAST CANAL STREAM 3F Dissolved Oxygen Total Phosphorus Median TN = 1.03 (n = 84), Median TP =

0.54 (n = 84), No BOD data ≥ 5.0 mg/L 3b 5 5 Impaired Medium 47/90 Verified impaired. Total phosphorus identified as the causative pollutant. EPA proposed a TMDL drafted by State DEP in September, 2004.



### 09-2316 Hillsborough River 1518 EAST CANAL STREAM 3F Nutrients (Chlorophyll) Median TN = 1.03 (n = 84), Median TP =

0.54 (n = 84), No BOD data ≤ 20 μg/L 3b 5 5 Impaired Medium 2003 (6.7), 2004 (6.3), 2005 (2.9),

2007 (12.09) Annual chlorophyll-a averages did not exceed 20 ug/L in 2003 (6.7), 2004 (6.3), 2005 (2.9), and 2007 (12.09). Nitrogen is limiting nutrient based on a TN/TP ratio of 1.9 (n=84). Listing based on dissolved oxygen impairment and nutrient (total phosphorus) impairment.



### 09-2317 Hillsborough River 1522A FLINT CREEK STREAM 3F Biochemical Oxygen Demand Dissolved Oxygen Total Nitrogen, Total Phosphorus, BOD Median TN = 2.01 (n = 73), Median TP = 0.36 (n = 76), BOD Median = 3.6 (n = 75). ≥ 5.0 mg/L 3c 5 5 Impaired High 62/77 Dissolved oxygen impairment linked to total nitrogen, total phosphorus, and BOD as the causative pollutants.

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 10 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2318 Hillsborough River 1522B LAKE THONOTOS ASSA LAKE 3F Dissolved Oxygen Dissolved Oxygen Total Nitrogen, Total Phosphorus, BOD Median TN = 2.55 (n = 156), Median TP = 0.32 (n = 167), BOD

Median = 6.3 (n = 142). ≥ 5.0 mg/L 2 5 5 Impaired Medium 39/172 Delisted from the 1998303(d) List in Cycle 1, relisted in Cycle 2. DEP completed TMDL in 1998 and EPA approved it. A revised TMDL will be needed because the existing TMDL was approved by EPA prior to the passage of the Fl Watershed Restoration Act



### 09-2319 Hillsborough River 1522B LAKE THONOTOS ASSA LAKE 3F Nutrients (Historic TSI) Median TN = 2.55 (n = 156), Median TP = 0.32 (n = 167), Median BOD = 6.3 (n = 142) > 78.3 ug/L 2 5 5 Impaired Medium 2001 (83.9, 52.9), 2002 (80.1, 50.7), 2003 (82.9, 83.1), 2004 (83.5, 59.6), 2005 (71.3, 69.7), 2007 (84.3, 45.7) For the historical listing (1975-1979), annual average TSI values in the verified period exceeded the minimum historical annual average value of 52.20 TSI units by more than 50% in 2001 - 2007, and exceedances were 83.9, 80.1, 82.9, 83.5, 71.3, and 84.3 TSI units. Nitrogen is the limiting nutrient based on a TN/TP ratio median of 8.43 (n = 156). The verified period median TN = 2.55 mg/L (n = 156), median TP = 0.32 mg/L (n = 167), and the BOD median = 6.3 mg/L (n = 142).



### 09-2320 Hillsborough River 1537 LAKE WIRE LAKE 3F Lead Pb ≤ e^(1.273[lnH]- 4.705) 3a 5 5 Impaired Medium 8/8 WBID name changed from Lake Parker to Lake Wire. This calculation has been done excluding the City of Lakeland data due to quality assurance issues.

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 11 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2321 Hillsborough River 1537 LAKE WIRE LAKE 3F Nutrients (TSI) Median TN = 0.89 (n = 8), Median TP = 0.08 (n = 8), No BOD data TSI <40; Color <40 3a 5 5 Impaired Medium 2007 (50.1, 16.7 PCU) Annual average TSI values exceeded 40 TSI units with color less than 40 PCU in 2007. The exceedance value is 50.1. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 9.8 (9 values). WBID name changed from Lake Parker to Lake Wire. This calculation has been done excluding the City of Lakeland data due to quality assurance issues.



### 09-2322 Hillsborough River 1542A MILL CREEK STREAM 3F Dissolved Oxygen Dissolved Oxygen Total Phosphorus Median TN = 0.93 (n = 71), Median TP = 0.3 (n = 74), BOD Median = 1.0 (n = 72). ≥ 5.0 mg/L 4c 5 5 Impaired High 43/72 Located within the Bone Valley region there is a strong correlation with total phosphorus and dissolved oxygen during the verified period.



### 09-2323 Hillsborough River 1542A MILL CREEK STREAM 3F Nutrients Nutrients (Chlorophyll) Median TN = 0.93 (n = 71), Median TP = 0.3 (n = 74), Median BOD = 1.0 (n = 72) ≤ 20 μg/L 2 5 5 Impaired High 2003 (3.9), 2004 (3.6) Annual average Chl-a values did not exceed 20 ug/l in 2003 (3.9) and 2004 (3.6). Nitrogen is the limiting nutrient based on a TN/TP ratio median of 2.81 (n = 71). Delisted from the 1998 303(d) list in Cycle 1, re-listed in Cycle 2. Nutrient (chl-a) impairment based on dissolved oxygen impairment and causative pollutant of total phosphorus.



### 09-2324 Hillsborough River 1543A LAKE HUNTER OUTLET STREAM 3F Dissolved Oxygen Total Phosphorus Median TN = 1.10 (n = 14), Median TP = 0.61 (n = 14), No BOD data ≥ 5.0 mg/L 3b 5 5 Impaired Medium 9/17

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 12 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2325 Hillsborough River 1547 SEFFNER CANAL STREAM 3F Dissolved Oxygen Total Phosphorus Median TN = 1.22 (n = 15), Median TP = 0.35 (n = 15), BOD Median = 1.1 (n = 15). ≥ 5.0 mg/L 3b 5 5 Impaired Medium 15/15



### 09-2326 Hillsborough River 1561 SPARTMAN BRANCH STREAM 3F Nutrients Nutrients (Chlorophyll) Median TN = 1.44 (n = 21), Median TP = 0.44 (n = 21), Median

BOD = 2.0 (n = 24) ≤ 20 μg/L 2 5 5 Impaired High 2002 (7.5) Annual chlorophyll-a did not exceed the 20 ug/L threshold. EPA proposed a TMDL drafted by State DEP in September, 2004. Nitrogen is the limiting nutrient based on a TN/TP ration median of 3.26 mg/L (n=21). Nutrient (chl-a) impairment based on dissolved oxygen impairment and causative pollutant of total phosphorus.



### 09-2327 Little Manatee River 1742A LITTLE MANATEE RIVER STREAM 3F Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 2 5 5 Impaired Low Verified Confirmed recent data (2006) of fish (LMB) with a sample size of n=12. Average Hg levels were 0.49 mg/kg which exceeded the threshold of 0.3 mg/kg of mercury.*



### 09-2328 Little Manatee River 1742B LITTLE MANATEE RIVER (NORTH FORK) STREAM 3F Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 2 5 5 Impaired Low Verified Confirmed recent data (2006) of fish (LMB) with a sample size of n=12. Average Hg levels were 0.49 mg/kg which exceeded the threshold of 0.3 mg/kg of mercury.*



### 09-2329 Little Manatee River 1742C LITTLE MANATEE RIVER TIDAL ESTUARY 3M Dissolved Oxygen Total Phosphorus Median TN = 0.81 (n = 101), Median TP = 0.27 (n = 103), BOD

Median = 1.1 (n = 75). ≥ 4.0 mg/L 4c 5 5 Impaired Medium 24/94 Impairment linnked to total phoshorus as the causative pollutant.

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 13 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2330 Little Manatee River 1742C LITTLE MANATEE RIVER TIDAL ESTUARY 3M Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 3a 5 5 Impaired Low Verified Confirmed recent data (2002, 2003 and 2004) for coastal and associated estuary fish advisories for king mackerel (n=87) and bull shark (n=28). Average Hg levels were 0.67 mg/kg in king mackerel and 1.85 mg/kg in bull shark which exceeded the threshold of 0.3 mg/kg of mercury.*



### 09-2331 Little Manatee River 1742C LITTLE MANATEE RIVER TIDAL ESTUARY 3M Nutrients (Chlorophyll) Median TN = 0.81 (n = 101), Median TP = 0.27 (n = 103), BOD

Median = 1.1 (n = 75). ≤ 11 μg/L 2 5 5 Impaired Medium 2003 (12.55) Annual average Chl-a values exceeded 11 ug/l in 2003 and the exceedance value was 12.55 ug/L. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 2.98 (92 values).



### 09-2332 Little Manatee River 1760 MILL BAYOU ESTUARY 3M Nutrients (Chlorophyll) Median TN = 0.96 (n = 19), Median TP = 0.28 (n = 19), BOD Median = 2.1 (n = 20). ≤ 11 μg/L 3a 5 5 Impaired Medium 2007 (13.40) Annual average Chl-a values exceeded 11 ug/l in 2007 and the exceedance value is 13.40 ug/L. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 3.82 (19 values). Verified period 'Median TN = 0.96 (n = 19), Median TP = 0.28 (n = 19), BOD Median = 2.1 (n = 20).



### 09-2333 Little Manatee River 1768 ALDERMAN N CREEK STREAM 3F Nutrients (Chlorophyll) Median TN = 1.8 (n = 15), Median TP = 0.76 (n = 15), BOD Median = 0.94 (n = 10) ≤ 20 μg/L 3b 5 5 Impaired Medium 2007 (1) Annual average Chl-a values did not exceed 20 ug/l in 2007. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 1.82 (15 values). Dissolved oxygen listed as impaired in cycle 1 and cycle 2 and nutrients linked to total nitrogen and total phosphorus.

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 14 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2336 Little Manatee River 1779 HAYNES BAYOU ESTUARY 3M Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 3a 5 5 Impaired Low Verified Confirmed recent data (2002, 2003 and 2004) for coastal and associated estuary fish advisories for king mackerel (n=87) and bull shark (n=28). Average Hg levels were 0.67 mg/kg in king mackerel and 1.85 mg/kg in bull shark which exceeded the threshold of 0.3 mg/kg of mercury. *



### 09-2337 Little Manatee River 1779 HAYNES BAYOU ESTUARY 3M Nutrients (Chlorophyll) Median TN = 1.2 (23 values), TP Median = 0.34 (23 values), No BOD data ≤ 11 μg/L 3a 5 5 Impaired Medium 2007 (20.55) Annual chlorophyll-a average exceeded 11 ug/L in 2007 (20.55 ug/L). Nitrogen is the limiting nutrient based on a median TN/TP ratio of 3.5 (23 values).



### 09-2338 Little Manatee River 1784 BOLSTER BAYOU ESTUARY 3M Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 3a 5 5 Impaired Low Verified Confirmed recent data (2002, 2003 and 2004) for coastal and associated estuary fish advisories for king mackerel (n=87) and bull shark (n=28). Average Hg levels were 0.67 mg/kg in king mackerel and 1.85 mg/kg in bull shark which exceeded the threshold of 0.3 mg/kg of mercury.



### 09-2339 Little Manatee River 1790 LITTLE MANATEE RIVER (SOUTH FORK) STREAM 3F Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 2 5 5 Impaired Low Verified Confirmed recent data (2006) of fish (LMB) with a sample size of n=12. Average Hg levels were 0.49 mg/kg which exceeded the threshold of 0.3 mg/kg of mercury.*

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 15 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2340 Little Manatee River 1792 UNNAMED DRAINAGE DITCH STREAM 3F Dissolved Oxygen Total Nitrogen, Total Phosphorus Median TN = 1.7 (n = 34), TP Median = 1.04 (n = 34), Median

BOD = 1.4 (n = 20) ≥ 5.0 mg/L 4c 5 5 Impaired Medium 26/41 Causative pollutants linked to total nitrogen and total phosphorus. Waterbody name needs to be changed to Curiosity Creek.



### 09-2341 Little Manatee River 1792 UNNAMED DRAINAGE DITCH STREAM 3F Fecal Coliform ≤ 400 Counts / 100 mL 3a 5 5 Impaired Low 20/24 Waterbody name needs to be changed to Curiosity Creek.



### 09-2342 Little Manatee River 1792 UNNAMED DRAINAGE DITCH STREAM 3F Nutrients (Chlorophyll) Median TN = 1.7 (n = 34), TP Median = 1.04 (n = 34), Median

BOD = 1.4 (n = 20) ≤ 20 μg/L 3a 5 5 Impaired Medium 2007 (1.97) Annual average Chl-a values did not exceed 20 ug/l in 2005. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 1.79 (34 values). Waterbody name needs to be changed to Curiousity Creek. Nutrients (chl-a) impairment based on dissolved oxygen impairment and causative pollutants of total nitrogen and total phosphorus.



### 09-2343 Little Manatee River 1800 LONG BRANCH STREAM 3F Fecal Coliform ≤ 400 Counts / 100 mL 3b 5 5 Impaired Low 7/14

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 16 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2344 Manatee River 1807B LAKE MANATEE RESERVOIR LAKE 1 Nutrients (TSI) Median TN = 0.96 (n = 260), Median TP = 0.31 (n = 264), BOD

Median = 2.2 (n = 255). TSI <60; Color > 40 2 5 5 Impaired Medium 2001 (53.7), 2002 (53.7), 2003 (52.6), 2004 (50.4), 2005 (50.9), 2006 (49.1) Impaired due to dissolved oxygen impairment and causative pollutant of total phosphorus. Dissolved oxygen was listed as impaired on the Cycle 1 verified list. Annual average TSI values did not exceed 60 TSI units in 2001 (53.7), 2002 (53.7), 2003 (52.6), 2004 (50.4), 2005 (50.9), and 2006 (49.1). Nitrogen is the limiting nutrient based on a median TN/TP ratio of 3.23 (250 values). Assessment based on data in Run 34, due to station errors in Run 35.



### 09-2345 Manatee River 1811 EAST FORK MANATEE RIVER STREAM 1 Dissolved Oxygen Total Phosphorus Median TN = 1.15 (n = 55), Median TP =

0.41 (n = 58), No

BOD Median. ≥ 5.0 mg/L 3b 5 5 Impaired Medium 13/67

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 17 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2346 Manatee River 1840 GILLY CREEK STREAM 1 Coliform Fecal Coliform ≤ 400 Counts / 100 mL 3c 5 5 Impaired High 13/17 Assessment based on data in Run 34, due to station errors in Run 35. In IWR Run 34, the following stations were assigned to WBID 1807B. These stations were re-assigned to WBID 1840 in IWR Run 35 in error, changing the assessment for these two WBIDs. These stations will be re-assigned back to WBID 1807B in IWR Run 36, which is their correct assignment based on public comments received by the Department from Manatee County during the Cycle 1 assessment. The list of stations are as follows: 21FLA 24010365, 21FLGW 26909, 21FLMANA24010365, 21FLMANAL1, 21FLMANAUM3, 21FLMANAUM-3, 21FLSWFD25785.



### 09-2347 Manatee River 1848A MANATEE RIVER BELOW DAM ESTUARY 3M Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 3a 5 5 Impaired Low Verified Confirmed recent data (2002, 2003 and 2004) for coastal and associated estuary fish advisories for king mackerel (n=87) and bull shark (n=28). Average Hg levels were 0.67 mg/kg in king mackerel and 1.85 mg/kg in bull shark which exceeded the threshold of 0.3 mg/kg of mercury. *

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 18 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2349 Manatee River 1848B MANATEE RIVER BELOW DAM ESTUARY 3M Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 3a 5 5 Impaired Low Verified Confirmed recent data (2002, 2003 and 2004) for coastal and associated estuary fish advisories for king mackerel (n=87) and bull shark (n=28). Average Hg levels were 0.67 mg/kg in king mackerel and 1.85 mg/kg in bull shark which exceeded the threshold of 0.3 mg/kg of mercury.*



### 09-2350 Manatee River 1872 MILL CREEK ESTUARY 3M Coliform Fecal Coliform ≤ 400 Counts / 100 mL 2 5 5 Impaired Low 8/29 Delisted from the 1998 303(d) list in Cycle 1. Changed on the master and verified list by hand and not in the IWR database.



### 09-2351 Manatee River 1872 MILL CREEK ESTUARY 3M Nutrients (Chlorophyll) Median TN = 0.97 (n = 35), Median TP = 0.4 (n = 37), BOD Median = 2.7 (n = 31). ≤ 11 μg/L 3a 5 5 Impaired Medium 2006 (16.86), 2007 (15.31) This waterbody is tidally influenced by the Manatee River and exceeded the 11 ug/L threshold for chlorophyll-a. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 2.3 (35 values). A nutrient TMDL will be completed with the dissolved oxygen TMDL. The waterbody type for this WBID will be changed to Estuary for IWR Run 36. Changed on this master list by hand and not in the IWR database.

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 19 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2352 Manatee River 1876 BRADEN RIVER BELOW WARD LAKE ESTUARY 3M Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 3a 5 5 Impaired Low Verified Confirmed recent data (2002, 2003 and 2004) for coastal and associated estuary fish advisories for king mackerel (n=87) and bull shark (n=28). Average Hg levels were 0.67 mg/kg in king mackerel and 1.85 mg/kg in bull shark which exceeded the threshold of 0.3 mg/kg of mercury.*



### 09-2353 Manatee River 1876A BRADEN R NR GS CAMP ESTUARY 3M Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 3a 5 5 Impaired Low Verified Confirmed recent data (2002, 2003 and 2004) for coastal and associated estuary fish advisories for king mackerel (n=87) and bull shark (n=28). Average Hg levels were 0.67 mg/kg in king mackerel and 1.85 mg/kg in bull shark which exceeded the threshold of 0.3 mg/kg of mercury. *



### 09-2354 Manatee River 1876B BRADEN RIVER NEAR ELLWOOD PARK ESTUARY 3M Mercury (based on fish consumption advisory) Exceeds DoH threshold (> 0.3 mg/kg) 3a 5 5 Impaired Low Verified Confirmed recent data (2002, 2003 and 2004) for coastal and associated estuary fish advisories for king mackerel (n=87) and bull shark (n=28). Average Hg levels were 0.67 mg/kg in king mackerel and 1.85 mg/kg in bull shark which exceeded the threshold of 0.3 mg/kg of mercury.*



### 09-2355 Manatee River 1890 WEBB BRANCH STREAM 1 Dissolved Oxygen Total Phosphorus Median TN = 0.98 (n = 33), Median TP =

0.63 (n = 33), No BOD data ≥ 5.0 mg/L 3a 5 5 Impaired Medium 26/50

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 20 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2357 Manatee River 1901 WILLIAMS CREEK STREAM 3F Dissolved Oxygen Total Phosphorus Median TN = 1.41 (n = 31), Median TP = 0.74 (n = 31), Median BOD = 2.0 (n = 24). ≥ 5.0 mg/L 4c 5 5 Impaired Medium 39/71 Impairment linked to total phosphorus as the causative pollutant.



### 09-2358 Manatee River 1901 WILLIAMS CREEK STREAM 3F Nutrients (Chlorophyll) Median TN = 1.41 (n = 31), Median TP = 0.74 (n = 31), Median BOD = 2.0 (n = 24). ≤ 20 μg/L 3a 5 5 Impaired Medium 2007 (11.69) Annual chlorophyll-a average did not exceed the 20 μg/L threshold in 2007 (11.69 μg/L). Nitrogen is the limiting nutrient based on a median TN/TP ratio of 1.9 (31 values). Impairment based on elevated nutrients; complete TMDL with dissolved oxygen TMDL.



### 09-2359 Manatee River 1923 RATTLESNA KE SLOUGH STREAM 1 Nutrients Nutrients (Historic Chlorophyll) Median TN = 1.16 (n = 85), Median TP = 0.38 (n = 85), Median

BOD = 2.6 (n = 90) > 9.82 ug/L 3a 5 5 Impaired High 2002 (16.1), 2003 (12.0), 2004 (13.4) Three consecutive years exceeded 50% above the historical threshold of 6.5 ug/L for the period of 1990-1994. Annual average Chla values were 16.1, 12.0, 13.4, 6.8, and 8.5 ug/L respectively from 2002- 2006. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 3.2 (79 values). No data for 2007 and 2008.

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 21 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments



### 09-2360 Manatee River 1926 CEDAR CREEK STREAM 1 Nutrients Nutrients (Chlorophyll) Median TN = 1.22 (n = 76), Median TP = 0.16 (n = 76), BOD Median = 2.0 (n = 81). ≤ 20 μg/L 2 5 5 Impaired High 2002 (6.0), 2003 (7.0), 2004 (13.44),

2005 (6.1), 2006 (7.5) Delisted from the 1998303(d) list in Cycle 1, relisted in Cycle 2. Nitrogen is the limiting nutrient based on a median TN/TP ratio of 7.7 (71 values). Complete nutrient TMDL with dissolved oxygen TMDL. Significant urban land use in watershed (greater than 60%). Nutrient (chl-a) impairment based on dissolved oxygen impairment and causative pollutant of total phosphorus.

1 Florida's waterbody classifications are defined as: 1 - Potable water supplies 2 - Shellfish propagation or harvesting 3F - Recreation, propagation, and maintenance of a healthy, well-balanced population of fish and wildlife in fresh water 3M - Recreation, propagation, and maintenance of a healthy, well-balanced population of fish and wildlife in marine water 4 - Agricultural water supplies 5 - Navigation, utility, and industrial use

2n is equal to the number of samples. When samples are collected at the same location less than 4 days apart, the median of those results represents a single sample for the purpose of determining n.

†EPA's Integrated Report Category: 5 - Water quality standards are not attained and a TMDL is required.

3 The Cycle 1 assessment was done in 2003 and included data from that Verified Period (January 1, 1996 through June 30, 2003).

4 The Cycle 2 assessment is the current assessment and includes data from the Verified Period (January 1, 2001 through June 30, 2008).

6Where a parameter was 1998 303(d) listed, if the priority shown on the 1998 303(d) list was low, for the second cycle assessment, the priority has been changed to high, to expedite meeting the consent decree schedule. Where a parameter was only identified as impaired under the IWR, a priority of “medium” was assigned. Exceptions are waters where the impairment poses a threat to potable water or human health, which have been assigned a “high” priority, and fecal coliform impairments, which have been assigned a “low” priority. All other listings as of this cycle are prioritized based on the following: it is the Department's intent that listings with a "High" priority be addressed within the next 5 years, listings with a "Medium" priority be addressed within 5-10 years as resources allow, and listings with a "Low" priority be addressed within the next 10 years.

6VP- Verified Period (January 1, 2001 through June 30, 2008)

* A statewide TMDL for mercury, that will address this waterbody, is scheduled to be completed in 2012. ^ Beach advisories are based on FL Dept of Health Enterococcus (>103 CFU/100mL) or fecal coliform (>399 CFU/100mL) criteria.

N/A = Not Applicable Beach advisory data is based on "2008 Beach Advisories" file created 05/07/2008 by FDEP. Fish advisory data is based on "2008 Fish Advisories" file created 07/10/2008 by FDEP.

# Tampa Bay Tributaries Group 2 Basin - Cycle 2 - Southwest District - FINAL Verified List Hydrologic Units: Alafia River, Hillsborough River, Little Manatee River, and Manatee River

May 7, 2009 22 of 22 Florida Department of Environmental Protection OGC Case

Number Planning Unit WBID Water Segment

Name Waterbody Type Waterbody Class1 1998 303(d) Parameters of Concern Parameters Assessed Using the Impaired Surface Waters Rule (IWR) Dissolved Oxygen / Biology Pollutant of

Concern 

### DO / Nutrient / Biology - TN, TP,

BOD Median Values (mg/L)2 

### Concentration of Criterion or Threshold Not Met Previous EPA Integrated Report Category †-Cycle 1 Assessment4 Current EPA Integrated

Report Category † -

Cycle 2 Assessment5 Current Integrated Category - Final

Assessment † Current Assessment Status Priority for TMDL Development5 

### Verified Period (# of Exceedances/ #

of Samples)6 Comments

The Tampa Bay Tributaries Cycle 2 Verified List is based on IWR Run 35_2.