2.2 water quality concerns 2.2.1 water quality … qualit… · but infiltrate into the ground. ......

12
STORMWATER MASTER PLAN Final Needs Assessment, Program Recommendations, & Cost Analysis Report Alachua County, Florida Page 2-10 March 2010 2.2 WATER QUALITY CONCERNS 2.2.1 Water Quality Project The Alachua County Environmental Protection Department (ACEPD) provided input as to numerous special project needs related to water quality assessment and/or improvement in the County. The projects identified are summarized in Table 2-1 below: Table 2-1 Water Quality Projects Project Name Project Description General Location Stormwater Inflow/Outfall Inventory In order to adequately assess which basins contribute to poor surface water quality and direct untreated stormwater into the Floridan aquifer an inventory of basins must be performed. Inflow and outflow nutrient concentrations are important for wet basins under both baseflow and stormwater flow conditions. Inflow is most important for dry basins as most do not have a surficial discharge but infiltrate into the ground. EPD staff will conduct an inventory of stormwater ponds and outfalls, including receiving waters; mapping contributing areas and land uses and prioritize for future monitoring. Alachua County Stormwater Management in Karst Areas Stormwater treatment in karst areas can negatively impact groundwater quality. Improved designs and sinkhole management can improve water quality and protect the Floridan aquifer. In some areas of western Alachua County, groundwater currently exceeds the state drinking water standard of 10 mg/L for nitrate. Increased runoff into sinkholes and other solution features can further increase nitrate concentrations. Solutions include redirecting stormwater from directly discharging to sinkholes and incorporating pretreatment. EPD staff will conduct and inventory of stormwater ponds discharging directly to sinkholes; map and prioritize for future mitigation. Western Alachua Co. Stormwater Quality Assessment of Stream to Sink Basins The objective is to conduct water quality monitoring in order to evaluate water quality impacts of stream to sink basins. In 21 streams untreated stormwater directly discharges to swallets or sinkholes which recharge the Floridan aquifer. Two of these stream to sink systems, Mill Creek and Lee Sink, have direct connections to Hornsby Spring as verified by qualitative dye tracing in July 2005. All of these stream to sink systems represent a considerable amount of recharge to the Floridan aquifer which is the primary source of drinking water to Alachua County. Protecting the quality of this aquifer from untreated stormwater is essential. Central Alachua Co. Stormwater Inflow/Outfall Sampling - Baseflow and Stormwater Flow Monitoring The objective is to conduct water quality monitoring to evaluate effectiveness of LID retrofit projects in improving water quality. Inflow and outflow nutrient concentrations are important for wet basins under both baseflow and stormwater flow conditions. Inflow is most important for dry basins as most do not have a surficial discharge but infiltrate into the ground. Installation of monitoring wells to obtain information of groundwater nutrient concentrations would be necessary in evaluating the effectiveness of basins for protecting groundwater quality. Alachua County

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Page 1: 2.2 WATER QUALITY CONCERNS 2.2.1 Water Quality … Qualit… · but infiltrate into the ground. ... trees around the upper portions of the basins and installing trees and ... various

STORMWATER MASTER PLAN Final Needs Assessment, Program Recommendations, & Cost Analysis Report Alachua County, Florida Page 2-10

March 2010

2.2 WATER QUALITY CONCERNS

2.2.1 Water Quality Project

The Alachua County Environmental Protection Department (ACEPD) provided input as to numerous special project needs related to water quality assessment and/or improvement in the County. The projects identified are summarized in Table 2-1 below:

Table 2-1 Water Quality Projects

Project Name Project Description General Location

Stormwater Inflow/Outfall

Inventory

In order to adequately assess which basins contribute to poor surface water quality and direct untreated stormwater into the Floridan aquifer an inventory of basins must be performed. Inflow and outflow nutrient concentrations are important for wet basins under both baseflow and stormwater flow conditions. Inflow is most important for dry basins as most do not have a surficial discharge but infiltrate into the ground. EPD staff will conduct an inventory of stormwater ponds and outfalls, including receiving waters; mapping contributing areas and land uses and prioritize for future monitoring.

Alachua County

Stormwater Management in

Karst Areas

Stormwater treatment in karst areas can negatively impact groundwater quality. Improved designs and sinkhole management can improve water quality and protect the Floridan aquifer. In some areas of western Alachua County, groundwater currently exceeds the state drinking water standard of 10 mg/L for nitrate. Increased runoff into sinkholes and other solution features can further increase nitrate concentrations. Solutions include redirecting stormwater from directly discharging to sinkholes and incorporating pretreatment. EPD staff will conduct and inventory of stormwater ponds discharging directly to sinkholes; map and prioritize for future mitigation.

Western Alachua

Co.

Stormwater Quality

Assessment of Stream to Sink

Basins

The objective is to conduct water quality monitoring in order to evaluate water quality impacts of stream to sink basins. In 21 streams untreated stormwater directly discharges to swallets or sinkholes which recharge the Floridan aquifer. Two of these stream to sink systems, Mill Creek and Lee Sink, have direct connections to Hornsby Spring as verified by qualitative dye tracing in July 2005. All of these stream to sink systems represent a considerable amount of recharge to the Floridan aquifer which is the primary source of drinking water to Alachua County. Protecting the quality of this aquifer from untreated stormwater is essential.

Central Alachua

Co.

Stormwater Inflow/Outfall

Sampling - Baseflow and

Stormwater Flow Monitoring

The objective is to conduct water quality monitoring to evaluate effectiveness of LID retrofit projects in improving water quality. Inflow and outflow nutrient concentrations are important for wet basins under both baseflow and stormwater flow conditions. Inflow is most important for dry basins as most do not have a surficial discharge but infiltrate into the ground. Installation of monitoring wells to obtain information of groundwater nutrient concentrations would be necessary in evaluating the effectiveness of basins for protecting groundwater quality.

Alachua County

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STORMWATER MASTER PLAN Final Needs Assessment, Program Recommendations, & Cost Analysis Report Alachua County, Florida Page 2-11

March 2010

Table 2-1 – Continued ACEPD Identified Special Projects

Project Name Project Description General Location

Groundwater Nutrient

Assessment in the Santa Fe Basin

The objective is to evaluate nutrient (nitrogen and phosphorus) data to assess landuse and stormwater impacts to the groundwater in western Alachua County and the springsheds of Poe and Hornsby. The Santa Fe River, an Outstanding Florida Water (OFW) is listed by the state as an impaired waterbody for nutrients. Spray fields for WWTP effluent disposal in High Springs, Alachua and Newberry are negatively impacting groundwater nitrate concentrations. Poor stormwater management will cause further degradation of groundwater that discharges to the Santa Fe River and associated springs. EPD staff will secure and manage a contract with a consulting firm for developing nutrient loading / mass balance from existing data

Western Alachua

Co.

Lake Santa Fe and Lake Alto Water

Quality Monitoring

The objective is to assess landuse and stormwater impacts to the water quality at Lake Santa Fe and Lake Alto. Lake Santa Fe is an OFW. Lake conditions currently place it in the mesotrophic category. It is important to reduce stormwater impacts to the lake and help reduce the potential for further eutrophication. EPD staff will conduct quarterly monitoring at six stations in Lake Santa Fe and two in Lake Alto

Lake Santa Fe

Stormwater Pond Vegetative

Enhancement for Water Quality Improvement

The objective is to improve existing stormwater systems via vegetative enhancements. Two wet ponds or semi-wet ponds will be selected annually for vegetative enhancement. Plantings will include establishing a canopy with larger trees around the upper portions of the basins and installing trees and herbaceous materials along the shoreline itself.

Alachua County

Stormwater Basin Fertilizer Use Pilot

Project

The objective is to conduct a pilot study to assess the impact outreach and education efforts on fertilizer use in residential areas. Evaluate outreach efforts to determine the best course of action to reduce fertilizer use and make the use of fertilizers more effective. Pilot project for three areas draining to stormwater ponds; 3 treatments (1 - full outreach and personal visits, 2- BMP mailers, 3- control); Wet and dry season sampling.

Western Alachua

Co.

Water Quality Protection BMP Training and Water Quality

Protection Public Education and

Outreach

Training and education for homeowners, commercial and industrial interests in sedimentation and erosion control and nutrient management to improve stormwater quality. The Santa Fe River is impaired for nutrients, as is Newnans Lake. Lochloosa and Orange lakes have deteriorating water quality and increased suspended solids and nutrients. The springs along the Santa Fe River are showing increasing degradation. Public education to promote stormwater nutrient (nitrogen and phosphorus) reduction is essential to protect groundwater and surface water resources. This is important in eastern Alachua County due to proximity of lakes and streams and in the central and western Alachua County due to the unconfined nature of the Floridan aquifer and the occurrence of stream-to-sink basins.

Alachua County

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STORMWATER MASTER PLAN Final Needs Assessment, Program Recommendations, & Cost Analysis Report Alachua County, Florida Page 2-12

March 2010

Table 2-1 – Continued ACEPD Identified Special Projects

Project Name Project Name General Location

Stormwater Management

Ponds

This project proposes water quality retrofits for water quality improvement in various drainage retention/detention areas or ponds throughout the County. Many of these ponds were created primarily for the purpose of water storage and flood protection, before design requirements for water quality improvement were implemented. As part of the retrofit projects, further evaluation of the drainage retention/detention areas will be conducted including the following: (1) identifying failed drainage areas that do not function as designed and permitted, (2) determining if these areas meet current water management district and Alachua County design criteria, and (3) evaluating remedial options and water quality improvement of the proposed retrofits. Drainage retention/detention area function will be evaluated using available plans, as-builts and through discussions with regulatory agencies. Selected areas or ponds will then be assessed using geotechnical investigations to analyze existing soil conditions and stratigraphy and determine the cause(s) for drainage area failure. Where possible, forebays, for sediment removal, and permanent pools (in wet detention systems) will be incorporated into the retrofit designs. Wet detention systems will be evaluated for existing infrastructure (inflow and outfall structures and piping) and littoral zone planting. Efforts on wet detention systems will focus on enhancement of pond function, improved water quality and native vegetative community structure and plant diversity. Projects involving dry retention areas will focus on pond function, native vegetative enhancement, and removal of invasive exotics. Retention/detention areas failing to meet permitted design requirements will be prioritized for water quality improvement. A listing of the identified projects is included on Table 2-2 with locations shown on Figure 2-4. LID principles should be considered in all proposed stormwater upgrades and new constructions in the County. Stormwater treatment technologies have vastly improved in recent years. Using LID techniques and basin redesign to improve water quality is essential. Redesigning wet basins to incorporate features such as a forebay for sediment control and berms to allow longer residence times will improve water quality, whether it is discharged to surface water or groundwater. Using techniques for partially "dry basins" that include infiltrating wetlands may mitigate potential impacts to groundwater and surface water quality. The potential for use (as a retrofit) of denitrification walls to reduce nitrates may exist in certain scenarios. Stormwater treatment using wetland treatment system such as infiltrating wetlands can improve potential impacts to groundwater and surface water quality. Improved designs that include denitrification can lower nitrogen inputs to waterbodies and ground water. Disturbed wetlands have often lost primary functions such as water quality enhancement. Restoration or "retrofit" of these disturbed wetlands will provide enhanced water quality in the entire watershed.

Alachua County

Roadside Drainage

Improvement

This project proposes water quality retrofits for roadside drainage improvement at various locations throughout the County. The road conditions at these location result in high sediment loadings to nearby surface water bodies. Potential improvements include grade control with swale ditch blocks, stabilizing soils, and re-vegetation. A listing of the identified projects is included on Table 2-3 with locations shown on Figure 2-5.

Alachua County

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Final Needs Assessment, Program Recommendations, & Cost Analysis ReportPage 2-13

Project # Project Name Project Type Acres Facility Type Impaired Water Improvement Measure Priority Cost

1 Deer Run IIIDrainage Right of

Way & Water Retention Area

1.20 Retention Basin Blues Creek (3682) Remove exotics and plant with natives High $14,000

2 Lake Bonnet Estates Phase II Drainage Easement 1.20 Dry Detention OFW Create permanent pool, plant

with natives High $28,000

3 Lake Bonnet Estates Phase II Drainage Easement 0.70 Dry Detention OFW Create permanent pool, plant

with natives High $28,000

4 Marchwood Drainage Easement & Common Area 0.65 Retention Basin Hogtown Creek (2698) Create permanent pool, plant

with natives High $14,000

5 NW 43rd ST Drainage Easement 1.60 Wet Detention Possum Creek (2696)Reconfigure for extended retention time, Remove

exotics, Plant with nativesHigh $210,000

6 Rustlewood Detention Pond 1.00 Wet Detention Possum Creek (2696)Reconfigure for extended retention time, Remove

exotics, Plant with nativesHigh $140,000

7 Benwood Estates Unit No. 2 Drainage Right of Way 0.50 Wet Detention Possum Creek (2696) Create permanent pool, plant

with natives Med $21,000

8 FDOT Drainage Right of Way 0.35 Wet Detention Possum Creek (2696) Plant with natives Med $3,500

9 N Main St Drainage Basin 1.80 Wet Detention Hogtown Creek (2698)Reconfigure for extended retention time, Plant with

nativesMed $350,000

STORMWATER MASTER PLANAlachua County, Florida

TABLE 2-2STORMWATER MANAGEMENT POND WATER QUALITY RETROFIT PROJECTS

natives

10 NW 43 St Drainage Right of Way 1.40 Retention Basin Possum Creek (2696)Reconfigure for extended retention time, Plant with

nativesMed $350,000

11 Sterling Place Unit 2 Common Open Space & Drainage Easement 1.40 Wet Detention Blues Creek (3682) Plant with natives Med $3,500

12 Autumn Woods Drainage Area Right of Way 1.15 Retention Basin Possum Creek (2696) Plant with natives Low $7,000

13 Celebration Oaks Common Area & Drainage Easement 1.20 Dry Basin Alachua Sink (2720A) Plant with natives Low $7,000

14 Green Leaf Unit No. 2 Drainage Right of Way 1.00 Retention Basin Kanapaha Lake (2717) Remove exotics and plant

with natives Low $14,000

15 Kenwood Unit 2 Drainage Easement 1.15 Retention Basin Kanapaha Lake (2717) Plant with natives Low $7,000

16 Lake Forest Glen Common Open Space & Drainage Easement 1.20 Retention Basin - - Create permanent pool, plant

with natives Low $42,000

17 Marchwood Drainage Easement & Common Area 0.40 Wet Detention Hogtown Creek (2698) Remove exotics and plant

with natives Low $3,500

18 Spring Meadow Drainage Basin 0.80 Dry Retention Hatchet Creek(2688) Create permanent pool, plant with natives Low $28,000

19 Tower Village IIICommon Recreation

Area & Drainage Easement

2.40 Retention Basin Kanapaha Lake (2717) Remove exotics and plant with natives Low $10,500

Total: $1,281,000Project list provided by the Alachua County Environmental Protection Department

March 2010

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DATA SOURCES:ROADWAY DATA: ALACHUA COUNTY, 2006COUNTY BOUNDARY: ALACHUA COUNTY, 2006EPD POND PROJECTS: ALACHUA COUNTY, 2006

©WILLISTON RD

US 441

US-301/SR-200E. UNIV. AVE.

NE CR-234

CR 225

HAWTHORNE RD

SR 121

NW 39TH AVENUE

C 20-A

S.W. ARCHER RD

S.W. 3

4TH

ST

US 44

1, M.

L.KIN

G DR

.

N.W. 156TH AVE

CR NE 42SR 26, NEWBERRY ROAD

AL C

O -32

5

NW 53 RD AVENUE

MILLHOPPER RD

SW 24TH AVENUE

SW 12

2ND

STRE

ET

CR SE 2082

N.W.

CR-

231

NE C

R 14

71

NE CR 1469

CR 222

N. M

AIN

ST.

NW 8TH AVENUE

SW 75

TH ST

REET

SW WACAHOOTA RD

N.W.

43RD

ST

SW 8TH AVENUE

N.W. 16TH AVE

SE 17

1 ST/

SE 16

3 ST

N.W. 156 AVE.CR-340

HOLDEN PARK RD

SW 62 AV.

N.W. 23RD AVE

SW 91

ST ST

NW 98

TH ST

S.W. 8

5TH

AVE.

NE 15

TH S

TREE

T

SE 35

TH S

T

NW 23RD AVENUE

NW 31ST STREET

KINC

AID

ROAD

NE 9T

H ST

REET

CR 225-A

SE CR 2082

SW 2ND AVENUE

NE 8TH AV NE 25 ST

SW&SE 4TH AVE

SW 43RD ST

SW 62

ND B

LVD

SW 63RD AVE

LEG A

SW 16TH AVE, SR 226

SW 91

ST ST

.

HULL RD

SW 46TH BLVD

NW 83

RD S

T.

SW 23RD TERRACE

SW 35TH PLACE

CR 234

FT CLARKE BLVD

SE 43

RD S

TREE

T C 22

5

LEG

BNW

17TH

STRE

ET

KINC

AID

ROAD

STORMWATER STORMWATER MASTER PLANMASTER PLAN

LegendALACHUA COUNTY BOUNDARYEPD POND RETROFIT PROJECTS

STORMWATERMANAGEMENTPOND WATER

QUALITY RETROFITPROJECT LOCATIONS

FIGURE 2-4

0 5,000 10,000Feet

0 1 2Miles

Lake Forest Glen

Celebration Oaks

NW 43 St

N Main St

Sterling Place Unit 2

Tower Village III

Deer Run III

NW 43rd ST

FDOT

RustlewoodAutumn Woods

Spring Meadow

Kenwood Unit 2

Marchwood

Green Leaf Unit No. 2

Lake Bonnet Estates Phase II

Marchwood

Lake Bonnet Estates Phase II

Benwood Estates Unit no. 2

ALACHUA COUNTY, FL

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Final Needs Assessment, Program Recommendations, & Cost Analysis ReportPage 2-15

1 County Road (CR) 2082 in Grove Park

Wide, poorly stabilized and poorly vegetated right-of-way (ROW) allows sediments and road base materials to move into creeks and wetlands.

Narrow "improved" ROW to reduce impacted and poorly vegetated areas, add grade control with swale ditch blocks, stabilize soils, and revegetate area.

0.5 miles $415,000 $207,500

2Old Bellamy Road north of Alachua at Mill Creek and Townsend Branch

High relief and frequent grading of the road add to the sediment load of Mill Creek and tributaries.

Grade control with swale ditch blocks, stabilize soils, provide stormwater retention, and revegetate area.

2.1 miles $290,000 $609,000

3

NW 227th Drive and NW 238th Avenue north of CR236 at O'Leno State Park boundary

High relief and frequent grading of the road cause sediments to be discharged to O'Leno State Park property.

Grade control with swale ditch blocks, stabilize soils, and revegetate area. .75 miles $290,000 $217,500

4 Old Bellamy Road north of CR236 and west of I-75

Wide unpaged road, high relief and frequent grading of the road cause sediments to be discharged to sinkholes and creeks.

Narrow “improved” ROW, add grade control with swale ditch blocks, stabilize soils, and revegetate area.

1.5 miles $290,000 $435,000

5

CR 219 A and CR 1474 near Campville and Beckhamton (north of Hawthorne)

Poorly stabilized ROW and culverts allow sediments into creeks and wetlands. Discharge impacts Little Orange Creek.

Stabilize culvert headwalls, add grade control with swale ditch blocks, stabilize soils, construction a sediment sump (for maintenance) and revegetate area. Evaluate feasibility of improvements to bridge downstream of CR 219A.

0.75 miles $415,000 $311,250

6 Whiting Street and SE 185th Street in Micanopy

High relief and frequent grading of the road cause sediments to be discharged to streams and wetlands.

Grade control with swale ditch blocks, stabilize soils and ROW, and revegetate area.

1 mile $290,000 $290,000

STORMWATER MASTER PLANAlachua County, Florida

TABLE 2-3ROADSIDE DRAINAGE IMPROVEMENT WATER QUALITY RETROFIT PROJECTS

Total CostEstimated Length

Estimated Cost Per MileProject # Site Description Proposed ProjectLocation

to streams and wetlands. area.

7 SE 65th Lane in Hawthorne

Wide, poorly stabilized and poorly vegetated ROW allows sediments and road base materials to move into creeks and wetlands. Discharge impacts Little Orange Creek.

Narrow "improved" ROW and driving lanes to reduce impacted and poorly vegetated areas, add grade control with swale ditch blocks, stabilize soils, and revegetate area.

0.75 miles $415,000 $311,250

8Rocky Creek at 142nd Avenue (north of Gainesville)

Relief and unstable ROW materials increase sediment loading to Rocky Creek (tributary to the Santa Fe River).

Narrow road width, remove limerock from ROW, grade control with swale ditch blocks, stabilize soils, and revegetate area.

0.5 miles $290,000 $145,000

9 NE 179th Terrace Orange Heights (north of SR26)

Relief and unstable ROW materials increase sediment loading to FDOT stormwater system on SR26 in Orange Heights.

Narrow road width, remove limerock from ROW, grade control with swale ditch blocks, stabilize soils, and revegetate area.

0.5 miles $290,000 $145,000

10NE 22nd Lane traversing Morans Prairie north of Campville

Relief, unstable ROW materials and proximity to wetlands allow sediment migration into the cypress wetlands.

Treat road to reduce sediment migration, control grade with swale ditch blocks, stabilize soils and ROW, and revegetate area.

0.6 miles $415,000 $249,000

11

Lochloosa Slough at SE 225th Drive and wetlands in proximity to 177th

Avenue

Relief, unstable ROW materials and proximity to wetlands allow sediment and trash migration into the cypress wetlands.

Treat roads to reduce sediment migration, control grade with swale ditch blocks, stabilize soils and ROW, revegetate area, and discourage illegal dumping.

1.3 miles $415,000 $539,500

12 Lakeshore DriveRelief and unstable ROW materials increase sediment loading to Newnan’s Lake.

Regrading, bioretention swales. 2 miles $700,000 $1,400,000

Project list provided by the Alachua County Environmental Protection Department

March 2010

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DATA SOURCES:ROADWAY DATA: ALACHUA COUNTY, 2006COUNTY BOUNDARY: ALACHUA COUNTY, 2006ROADSIDE DRAINAGE IMPROVEMENT PROJECTS:ALACHUA COUNTY, 2006

0 2 4Miles

0 10,000 20,000Feet

©US

41/27

US 441

SR 12

1

US-301/SR-200

WILLISTON RD

SR 235

CR 225

CR-236

SR 24

1

NE CR-234

E. UNIV. AVE.

GIBS

ON ST

NW CR-235

AL C

O -32

5

MILLHOPPER RD

HAWTHORNE RDS.W. ARCHER RD

SR 26, NEWBERRY ROAD

CR SW

13

NW 39TH AVENUE

US 44

1, M.

L.KIN

G DR

.

SW 46 AVE

C 20-A

NW 94 AVE

S.W. 3

4TH

ST

NW.14

3 ST.C

R-24

1

NW CR-2054

N.W.

CR-

231

N.W. 156TH AVE

SW 30TH AVE

CR NE 42

NW 20

2 ST

CR-23

5A/N

W 17

3 ST

S.W.26

6 ST.C

R-33

7

NE C

R 14

71

CR 222

SW 15TH AVE

NW 53 RD AVENUE

CR 20

54

SW 24TH AVENUE

SW 12

2ND

STRE

ET

CR 23

7CR SE 2082

CR N

W 14

91

CR NE 21 ST

NE C

R 14

69

N. M

AIN

ST.

SW WACAHOOTA RD

NW 142 AVE

NW 46 AVE

NW 32 AVE

NW 46TH AVE

N.W.

43RD

ST

SW 8TH AVENUE

SW 182 AV CR 340

SE 17

1 ST/

SE 16

3 ST

N.W. 156 AVE.CR-340

HOLDEN PARK RD

SW 62 AV.

N.W. 23RD AVE

S.W. 85TH AVE.

N 1ST AVE

NE 15

TH S

TREE

T

SE 35

TH S

T

KINC

AID

ROAD

N.W. 222 ST.

CR-34

6-A, S

W 91

ST ST

CR 225-A

SW 43RD ST

SW 63RD AVE

LEG A

SE 26TH ST

SW 91

ST ST

.HULL RD

NW 110 AVE

NW 51

ST ST

SW 79TH AVE

SW 6

NW

6TH

STRE

ET

CR 234

SE N

E 3R

D ST

REET

CR 225

KINC

AID

ROAD

STORMWATER STORMWATER MASTER PLANMASTER PLAN

LegendALACHUA COUNTY BOUNDARYRoadside Drainage Improvement Projects

ROADSIDE DRAINAGEIMPROVEMENT WATER

QUALITY RETROFITPROJECT LOCATIONS

FIGURE 2-5

CR 219 A and CR 1474 nearCampville and Beckhamton

(north of Hawthorne)

Lochloosa Slough at SE 225th Driveand wetlands in proximity to 177th Avenue

NW 227th Drive andNW 238th Avenuenorth of CR236 at

O'Leno State Park boundary

Whiting Street and SE 185th Street in Micanopy

NE 22nd Lane traversingMorans Prairie

north of Campville

NE 179th TerraceOrange Heights(north of SR26)

Lakeshore Drive

SE 65th Lanein Hawthorne

Old Bellamy Road north ofCR236 and west of I-75

Old Bellamy Road north ofAlachua at Mill Creek and

Townsend Branch

County Road (CR) 2082in Grove Park

Rocky Creek at 142nd Avenue(north of Gainesville)

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STORMWATER MASTER PLAN Final Needs Assessment, Program Recommendations, & Cost Analysis Report Alachua County, Florida Page 2-17

March 2010

An example of one of the roadside improvement projects (#9) is the area of NE 179nd Street in Orange Heights (north of SR26 just east of US 301). This area has been a concern of the County’s as well as the SJRWMD. The graded road (NE 179nd Street) is wide and during rainfall events water flows south on the west side of NE 172nd Street and into the FDOT concrete lined swale on the north side of SR26. This in turn flows under SR 26 to wetlands that are the headwaters for Lochloosa Creek. The first below photograph shows turbid water from a recent rainfall event at a portion the eroded area along the west side NE 172nd Street and the FDOT swale. The second below photograph shows the FDOT lined channel. The swale area along the west side of NE 172nd Street needs to be stabilized and water directed to a vegetated swale to eliminate/reduce the turbid water discharge during rainfall events.

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STORMWATER MASTER PLAN Final Needs Assessment, Program Recommendations, & Cost Analysis Report Alachua County, Florida Page 2-18

March 2010

Another example of a roadside improvement project (#11) is where Lochloosa Slough is crossed by SE 225th Drive. At this location there is considerable trash along the road and in the slough itself. The below photograph shows waste in the water adjacent to the road near the culvert that should be removed to protect water quality. Trash, as well as sediment discharge to the wetlands, are on-going problems along this road.

For project roadside improvement project #5 at Little Orange Creek at 219A and CR 1474, remnants of recent erosion along the culvert headwalls and in the swales was observed on 219A and CR 1474 west of CR 219A. Stabilization of soils in these areas is important. A resident in the area also reported possibly related bridge problems on his property east (downstream) of CR 219A. The resident said logs and debris needed to be cleared from what he understood was a county maintained drainage easement along the creek upstream and adjacent to the property. Debris appeared to be threatening the stability of his bridge over the creek. The bridge structure itself may also require improvements.

These projects represent actions intended to increase the County’s responsiveness to the water quality needs of its citizens through the gathering and compilation of valuable information and implementation of responsive programs and guidelines. In order to implement the above projects, additional staff resources for administration are necessary. Additional equipment and funding resources would also be necessary in some instances.

Implementation of these projects to further the County’s focus on improving water quality in its lakes, streams, and aquifer represents a need that Alachua County should address. To address this need, additional staff and project funding resources would be required beyond what the County currently has allocated.

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STORMWATER MASTER PLAN Final Needs Assessment, Program Recommendations, & Cost Analysis Report Alachua County, Florida Page 2-19

March 2010

2.2.2 Basin Management Action Plans

Current Total Maximum Daily Loads (TMDL) regulations have resulted in the need to develop Basin Management Action Plans (BMAPs). BMAPs are developed by a multidisciplinary taskforce of stakeholders with interest in the particular TMDL water body or water bodies affected. The task force works together to develop a binding plan of action which works towards the TMDL goals. Typical BMAP components include:

1. Compile existing data and identify data gaps

2. Identify pollutant sources & estimates of associated loading

o Quantify sources (point and non-point), including growth

3. Share responsibilities for load reductions

o Produce detailed allocations

4. Develop management actions

o Describe existing and proposed management actions, and estimate expected pollutant reductions

5. Develop implementation schedule and funding

6. Establish mechanisms to show progress

o ambient monitoring, evaluation, and reporting

o implementation monitoring

o adaptive management measures

The primary BMAPs the County will need to address in the future are for Orange Creek and the Santa Fe River TMDL planning units. These areas are shown on Figure 2-6.

The Orange Creek BMAP process culminated in the plan being adopted in May 2008. The BMAP document provides a detailed summary of the assessment efforts and planned pollutant reduction strategies the BMAP task force developed. According to the BMAP, Alachua County will be actively involved solely or as a partner in the following types of management actions:

1. Public Education;

2. Stormwater Permit Program;

3. Structural Stormwater BMPs;

4. Conservation / BMPs – Land Acquisition;

5. Bacteria “Hot Spot” Program;

6. Restoration and Water Quality Improvement; and

7. Special Studies and Planning actions.

Based on the BMAP, there is a need for the County to allocate resources to meet the intent of the BMAP document. This will include staff and funding resources to administer and implement the identified processes and projects. Refer to the May 2008 BMAP document for further details.

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DATA SOURCES:ROADWAY DATA: ALACHUA COUNTY, 2006COUNTY BOUNDARY: ALACHUA COUNTY, 2006MAINTENANCE CONCERNS: COMPILED FROM COUNTY PUBLIC WORKS SERVICE REQUEST LOGS, 2001 TO 2007

0 2 4Miles

0 10,000 20,000Feet

©

Santa Fe River

US 41

/27

US 441

SR 12

1

US-301/SR-200

WILLISTON RD

SR 235

CR 225

CR-236

SR 24

1

NE CR-234

E. UNIV. AVE.

GIBS

ON ST

NW CR-235

AL C

O -32

5

MILLHOPPER RD

HAWTHORNE RDS.W. ARCHER RD

SR 26, NEWBERRY ROAD

CR SW

13

NW 39TH AVENUE

US 44

1, M.

L.KIN

G DR

.

SW 46 AVE

C 20-A

NW 94 AVE

S.W. 3

4TH

ST

NW.14

3 ST.C

R-24

1

NW CR-2054

N.W.

CR-

231

N.W. 156TH AVE

SW 30TH AVE

CR NE 42

NW 20

2 ST

CR-23

5A/N

W 17

3 ST

S.W.26

6 ST.C

R-33

7

NE C

R 14

71

CR 222

SW 15TH AVE

NW 53 RD AVENUE

CR 20

54

SW 24TH AVENUE

SW 12

2ND

STRE

ET

CR 23

7

CR SE 2082

CR N

W 14

91

CR NE 21 ST

NE C

R 14

69

N. M

AIN

ST.

SW WACAHOOTA RD

NW 142 AVE

NW 46 AVE

NW 32 AVE

NW 46TH AVE

N.W.

43RD

ST

SW 8TH AVENUE

SW 182 AV CR 340

SE 17

1 ST/

SE 16

3 ST

N.W. 156 AVE.CR-340

HOLDEN PARK RD

SW 62 AV.

N.W. 23RD AVE

S.W. 85TH AVE.

N 1ST AVE

NE 15

TH S

TREE

T

SE 35

TH S

T

KINC

AID

ROAD

N.W. 222 ST.

CR-34

6-A, S

W 91

ST ST

CR 225-A

SW 43RD ST

SW 63RD AVE

LEG A

SE 26TH ST

SW 91

ST ST

.HULL RD

NW 110 AVE

NW 51

ST ST

SW 79TH AVE

SW 6

NW

6TH

STRE

ET

CR 234

SE N

E 3R

D ST

REET

CR 225

KINC

AID

ROAD

STORMWATER STORMWATER MASTER PLANMASTER PLAN

LegendALACHUA COUNTY BOUNDARYFDEP TMDL PLANNING UNITSSANTA FE RIVER BMAP AREAORANGE CREEK BMAP AREA

TMDL BMAPAREAS

FIGURE 2-6ORANGECREEKFLORIDA RIDGE

WACCASASSARIVER

SANTA FERIVER

ETONIACREEK

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STORMWATER MASTER PLAN Final Needs Assessment, Program Recommendations, & Cost Analysis Report Alachua County, Florida Page 2-21

March 2010

The Santa Fe River BMAP process was initiated in November 2009. During the process of BMAP development, it is expected that many of the same types of water quality pollutant reduction targeting projects and management actions will be identified which will also require implementation. The Santa Fe River BMAP will also be distinct in several ways in that it will have numerous different stakeholders affected as well as more of a focus on protecting groundwater resources from impacts by surface water. Similar to the Orange Creek BMAP, Alachua County will have an allocation of responsibility to implement management actions.

In order to effectively manage the County’s stake in these BMAPs, and to insure that the management actions are carried out in a proactive and responsive manner, additional administrative staff resources are necessary. Supporting project funding would also be necessary to implement some of the management action objective.

Implementation of the recommendations of the current Orange Creek BMAP and future Santa Fe River BMAP represents a need that Alachua County should address. To address this need, additional staff and project funding resources would be required beyond what the County currently has allocated.