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 1998 

303(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 1998 

303(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/L 

in 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 1998 

303(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 PCU

Annual 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 PCU

Annual 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 1998 

303(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 1998 

303(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 1998 

303(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

2

 n 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).

6

 Where 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.

6

 VP - 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.