Crooked River Mitigation Bank
Total Page:16
File Type:pdf, Size:1020Kb
Crooked River Mitigation Bank Section G of the Environmental Resource Permit Application Introduction The Crooked River Mitigation Bank (CRMB, Bank) consists of 323.10 acres of a mixture of degraded natural wetland and upland habitats, and agricultural areas where the historical natural habitats have been converted to citrus grove. In general, the site consists of variable hydroperiod herbaceous and forested wetlands intermixed with pine flatwoods in the south, along with herbaceous and forested wetlands surrounding a citrus grove in the north. Old Polk City Road bisects the CRMB near the northern boundary. The entire site is currently degraded by habitat conversion, intensive agriculture, exotic species invasion, trash deposition, fire suppression, and hydrological impacts. Hydrological impacts include the continuous deposition of soil runoff, herbicides, pesticides, and fertilizer from the active citrus grove into all onsite and some offsite wetlands. The CRMB site exhibits both additional exempt agricultural development potential as well as residential development potential due to the proximity to County Road 557 and Interstate 4. Establishment of Crooked River Mitigation Bank will save this site from current aquatic impacts, further development and irreversible loss of aquatic function. The entire CRMB is owned fee-simple by the Hillbilly Holdings, LLC. There are old mineral reservations with no right of entry in some areas of the CRMB; these old mineral reservations will not interfere with Bank establishment. Part 1: Location of the Proposed Mitigation Bank (62-342.450(1), F.A.C.) The CRMB is located in Sections 4, 5, 8, 9, Township 27S, Range 26E with the approximate center of the site located at Latitude 28° 09’ 23.39” N, Longitude -81° 43’ 17.24” W. The Bank is located in the Green Swamp Area of Critical State Concern. The immediate surrounding area consists of Hilochee Wildlife Management Area (WMA) - Osprey Unit immediately adjacent to the north, CR 557 to the west, citrus groves and wetlands to the south, and Hilochee WMA - Osprey Unit immediately adjacent to the east. The CRMB is located southeast of Old Polk City and west of Haines City. The CRMB contains the headwaters of the Withlacoochee River and forms a complete corridor between two areas of Hilochee Wildlife Management Area - Osprey Unit, a 6,093 acre conservation land managed by the Florida Fish and Wildlife Conservation Commission (FFWCC). Please refer to Figure 1: Vicinity Map. Please provide the following information: 1. A map, at regional scale, of the mitigation bank in relation to the regional watershed and proposed mitigation service area; The proposed Mitigation Service Area for the Bank is the Withlacoochee River watershed: HUC 03110203. Please refer to Figure 2: Mitigation Service Area. The CRMB is located within the headwaters of the Withlacoochee River, the dominant river basin in the watershed. The CRMB contributes to aquatic resource integrity downstream throughout the Withlacoochee River and into Withlacoochee Bay in the Gulf of Mexico. The CRMB is a large site adjacent to conservation land located in the headwaters of the watershed, which provides wildlife utilization 1 Crooked River Mitigation Bank and landscape connectivity throughout this watershed and adjacent watersheds within the Green Swamp. 2. A vicinity map showing the mitigation bank in relation to adjacent lands and off-site areas of ecological or hydrologic significance which could affect the long term viability or ecological value of the bank; Figure 1: Vicinity Map and Figure 3: Regional Significance depicts CRMB in relation to adjacent lands and off-site areas of ecological significance. Additionally, due to its location in the watershed and the significant exchange with the Floridan aquifer, there is little risk that the water sources which maintain the aquatic functions on CRMB could be jeopardized in the future. The CRMB is located adjacent to 6,487 acres of conservation areas, including the 6,093 acre Hilochee WMA that combined with the CRMB provides a complete corridor to the SWFWMD managed 394 acre Lake Lowry Marsh, which contribute to the persistence of the plant and wildlife communities on the site and within the region. Adjacent land uses and expected future land use changes will not negatively affect the ability to maintain aquatic resource functions. 3. A recent aerial photo of the mitigation bank (in color; 11 X 17 inches or greater) identifying boundaries of the project area and showing the assessment areas; Figure 4: Aerial Photograph depicts a recent aerial photograph of CRMB identifying boundaries of the project area and Figure 5: Current Habitat Types shows the assessment areas. 4. A recent aerial photo of the mitigation bank (in color; 11 X 17 inches or greater) identifying boundaries of the project area and showing the assessment areas; Figure 4: Aerial Photograph depicts a recent aerial photograph of CRMB identifying boundaries of the project area and Figure 5: Current Habitat Types shows the assessment areas. 5. One or more historic aerial photos of the mitigation bank (no photocopies) identifying boundaries of the project area and showing the proposed assessment areas, if substantially different from current conditions; Aerial photography for the CRMB dates back to 1941 (Figure 6: 1941 Historical Aerial). At that time, the historical hydrology was relatively unaltered except for an earlier path of Old Polk City Road that bisects the Bank in the north. This time period was representative of the historical hydrology and land use in the area; no onsite habitat conversion (other than the road) was apparent from the 1941 aerial. The CRMB and Hilochee WMA – Osprey Unit are at the top of the watershed within the headwaters of Withlacoochee River, within the Green Swamp Area of Critical State Concern. Within this area, a mosaic of long hydroperiod freshwater marshes and forested wetlands would periodically fill with water, recharging the Floridan aquifer and flowing very slowly to the north. This predominantly wetland system contained islands of uplands, including larger scrub islands and smaller islands of pine flatwoods. This large wetland system slowly flows through wetlands northward until reaching the Withlacoochee River, then draining 2 Crooked River Mitigation Bank downstream into the Gulf of Mexico near the City of Crystal River at Withlacoochee Bay. Sometime after 1941, significant hydrological impacts of the CRMB began to occur. By 1952 (the next year available), the large scrub island onsite had been cleared for conversion into a citrus grove. This adjacent upland conversion significantly impacted the natural hydrology; the adjacent wetlands experienced increased sedimentation from runoff, exotic species invasion, as well as deposition of a variety of chemicals, including herbicides, pesticides, and fertilizers. Fire suppression was prevalent onsite and in the surrounding area as native habitats were converted to agricultural uses. Over the next 50 years, the wetland and upland habitats were further degraded, onsite and within the surrounding area, due to increasing use for agriculture. Old Polk City Road was straightened, impacting a forested wetland in the north that was originally avoided. The forested wetlands were degraded from periodic logging, especially in the shallower areas where timber harvesting equipment could access in the dry season. Fire suppression, now more than 70 years since the last fire (pre-1941), has degrading the ecological function of the remaining native habitats due to oak encroachment of the pine flatwoods and tree invasion of the freshwater marshes. Oak encroachment into pine flatwoods significantly disrupts wildlife utilization, and tree invasion substantially alters the community structure and composition. From 1952 until today, the CRMB was used primarily as a citrus grove. 6. A highway map showing points of access to the mitigation bank for site inspection; Figure 4: Aerial Photograph depicts access points to CRMB. 7. A legal description of the proposed mitigation bank. Please refer to Attachment G1: Legal Description for the legal description of the proposed Bank. Part 2: Ecological Significance (62-342.450(2), F.A.C.) Please provide the following information: 1. A description of the ecological significance in the proposed watershed in which it is located. Many natural resource analyses and management plans support the need for the project in this area. Benefits from the establishment of CRMB exist at multiple scales. The CRMB provides benefits at three scales: 1) Statewide, 2) Regional (Watershed), and 3) Local (County). The State of Florida’s Critical Lands and Waters Identification Project (CLIP) (FNAI 2012) was used to help target the site for conservation. Florida Forever’s Conservation Needs Assessment (CNA) (FNAI 2015) is a useful tool to evaluate the conservation benefit of the CRMB from a statewide perspective. Table 1: FNAI Conservation Needs Assessment summarized the contributions of the CRMB to statewide conservation goals. 3 Crooked River Mitigation Bank Table 1: FNAI Conservation Needs Assessment MEASURES Acres* %* B1: Strategic Habitat Conservation Areas Priority 2 212 66% Total Acres 212 66% B2: FNAI Habitat Conservation Priorities Priority 6 180 56% Total Acres 180 56% B3: Ecological Greenways Priority 2 323 100% Total Acres 323 100% B4: Under-Represented Natural Communities Mesic/Wet Flatwoods (G4) 20 6% Total Acres 20 6% C4: Natural Floodplain Function Priority 2 189 59% Priority 3 61 19%