W11 UMAM - South Florida Water Management District

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W11 UMAM - South Florida Water Management District

Uniform Mitigation AssessmentMethod (UMAM)September 8, 2010Anita R. Bain, DirectorEnvironmental Resource Permitting Division


History of MitigationMitigation is required when apermit applicant proposes to fillwetlands as part of adevelopment projectPrior to UMAM:Mitigation Ratios• 1 acre of impact = 2 to 5 acresof creation of wetlands asmitigation• Separate ratios for melaleucawetlandsPrevious rule did not include afunctional assessment ofwetlands and mitigation2


History of UMAMJanuary 2000 – Office of Program Policy Analysis &Government Accountability (OPPAGA) found thatmitigation ratios do not adequately address gains andlosses of wetland functionsIn 2000 Legislature directed FDEP and WMD’s todevelop a functional assessment methodExtensive public input over a 4 year rulemaking processto develop UMAM rule.DEP Rule 62-345 F.A.C. became effective in February20043


Chapter 373.414 (18), F.S.The department shall adopt UMAM byrule and thereafter “the rule shallprovide an exclusive and consistentprocess for determining the amount ofmitigation required to offset impacts towetlands and other surface waters, andonce effective, shall supersede allrules…that determine the amount ofmitigation needed to offset suchimpacts.”4


Chapter 373.414 (18), F.S.Once the department adopts theuniform mitigation assessment methodby rule, the uniform mitigationassessment method shall be binding onthe department, the water managementdistricts, … and shall be the sole meansto determine the amount of mitigationneeded to offset adverse impacts towetlands and other surface waters andto award and deduct mitigation bankcredits.5


Uses of UMAMEvaluates functions ofall types of wetlands,surface waters, andbenthic communities inall parts of the state ofFloridaIncludes assessment ofboth direct andsecondary impacts6


Freshwater Communities7


Mangrove/Salt Water Communities8


Seagrasses/Benthic Communities9


Uses of UMAMUMAM Does Address:Amount of mitigation needed to offset a wetland impactProfessional collaboration and documentation of wetlandfunctions and mitigation evaluationsUMAM Does Not Address:Reduction and eliminationAppropriateness of mitigationOut-of-kind mitigationCumulative impactsMitigation for certain types of secondary impacts (manateespeed zones, wildlife crossings)Whether all conditions for issuance have been met10


UMAM Assessment and Scoring11


Staff Process for UMAM ScoringApplicant submits site plans, wetlandlines, and preliminary UMAMinformationDistrict staff reviews hydrologic, landuse, wildlife, soils and other technicalinformationMost staff has extensive fieldexperience in their geographic areasand in conducting UMAM assessmentsStaff conducts site visit and makes thefinal determination on UMAM scores12


UMAM Scoring CategoriesLocation & Landscape SupportWater EnvironmentCommunity Structure13


Water EnvironmentHydrology - timing,frequency, depth and durationof inundation or saturationFlow patterns & water levelindicatorsWater Quality effects on fishand wildlife habitatSoil moistureHydrologic stress15


Community StructurePlant Species anddistributionAppropriate vegetationVertical structureVegetation HealthRegeneration/ recruitmentMicrotopography16


Benthic/Seagrass CommunitiesReview associated with dock& marina projectsBenthics include marinecommunities with no plantcoverage. Evaluate type &number of benthic organismsSeagrasses located alongshoreline in shallow watersCondition, regeneration &recruitmentStructural features andspawning and nestinghabitats17


Ongoing/Recent EffortsField testing with Audubon staffOngoing UMAM training workshops forregulated public/agencies as well as stafftrainingInteragency meetings with other WMDsand DEP to ensure consistency andconsider possible rule updatesReview of Audubon proposal for trainingmodule and data tracking18


Elements of Proposed AudubonTraining Module – Already in use or tobe incorporatedAdditional tracking of impacts using hydrologicfunctional group (short/long hydroperiod)Incorporate melaleuca research literature into trainingmaterialsEnsure use of land use codes (FLUCCS) only for nativewetland community types19


Elements of Proposed Audubon TrainingModule – Requires Rule ChangeMinimize use of preservation orenhancement for direct wetland impactsTracking of wetland acreage loss/gain inaddition to functionsNatural water storage – track storagevolume changes (depth) due to wetland lossRequire pre/post linear measurement &preservation of of wetland/upland interfaceMelaleuca dominated wetlands - ScoreWater Environment and Location/Landscapefactors as if melaleuca is not presentScarcity adjustment factor20


UMAM Interagency CoordinationPart I Form Update/ClarificationPreservation/EnhancementcalculationsImprove Field Data documentationIssues unique to Mitigation BanksTime LagLocation/Landscape21


Moving ForwardIncorporate tracking of long/short termhydroperiod wetlands and mitigationinto existing database and trainingmaterialsIncorporate melaleuca researchinformation into training materialsContinue external/internal UMAMtraining and workshopsContinue interagency coordination forconsistency22

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