South Florida Water Management District / Miami-Dade

Environmental Resource Permit Applicant's Handbook Volume II For Use Within the Geographic Limits of the South Florida Water Management District

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Regional SFWMD ERP Applicant's Handbook Vol II (not a Miami city-only ordinance). Jurisdiction coded as county per task guidance to reflect Miami-Dade regional coverage; SFWMD is a water management district. Numeric WQ treatment depths live primarily in AH Vol. I (referenced throughout Vol. II).

Fields not found in document: design_criteria.required_hydrologic_hydraulic_software

Other manuals in Florida: Florida, Southwest Florida Water Management District / Tampa Bay, Suwannee River Water Management District / Gainesville (north-central Florida)

Document Metadata

Jurisdiction level

county

“Within Miami-Dade County, an ERP is not required for the construction, alteration, or operation of a SWM system in uplands”
Section 1.2

State

Florida

“South Florida Water Management District Clerk's Office, 3301 Gun Club Road, West Palm Beach, FL 33406”
Section 4.1.1 / references

Version / edition

AH Vol. II (6/28/24)

“AH VOL. II (6/28/24)”
Header / Title Page

Adoption / effective date

2024-06-28

“EFFECTIVE JUNE 28, 2024”
Title Page

Last revised date

2024-06-28

“EFFECTIVE JUNE 28, 2024”
Title Page

Relationship to state manual

independent

“This Volume provides specific, detailed stormwater quality and quantity design and performance criteria for SWM systems regulated by the District through the ERP program authorized under Part IV of Chapter 373, F.S.”
Section 1.0 Introduction

Design Criteria

Design storm return periods (years)

5-year, 25-year, 100-year

“Unless otherwise specified by previous Agency permits, criteria, or Appendix A to this Volume, a 25-year, 3-day storm event shall be used in computing off-site discharge rates.”
Section 3.2 Design Storm

Water quality volume method

Water quality treatment volumes and pollutant load-reduction requirements are set forth in ERP Applicant's Handbook Volume I; Volume II adds SFWMD-specific retention/detention criteria (e.g., commercial/industrial projects provide a minimum of 20% of the AH Vol. I load reduction in a retention BMP; exfiltration trenches sized for AH Vol. I water quality requirements exfiltrated over one hour prior to overflow; treatment volume in retention/exfiltration systems is not discharged to surface waters).

“Commercial or industrial zoned projects shall provide a minimum of 20% of the load reduction required by AH Vol. I in a retention BMP or a separate containment system designed to prevent discharge.”
Section 4.1.1 Land Use and Coverage Criteria

Peak flow calculation method(s)

Pre- and post-development runoff hydrographs with detention routing (stage-storage-discharge), SCS Peak Rate Factor (K') method, NRCS National Engineering Handbook Section 4, Part 630, Chapter 10 (peak factors), Rational method (for water quality retention/detention)

“An acceptable historic peak discharge analysis typically consists of generating pre-development and post-development runoff hydrographs, routing the post-development hydrograph through a detention basin, and sizing an overflow structure to control post-development discharges at or below pre-development rates.”
Section 3.2.1 Methodologies

Required hydrologic/hydraulic software

Not found in document

No evidence cited

Approved BMP categories

Retention systems (depressional areas, shallow landscaped areas, vegetated swales), Dry retention/detention, Wet detention, Exfiltration trench (underground), Above Ground Impoundment (AGI), Grassed waterways / spreader swales

“Examples of retention systems include: (a) Man-made or natural depressional areas... (b) Shallow landscaped areas designed to store stormwater; and (c) Vegetated swales with swale blocks or raised inlets.”
Section 5.2.1 Retention System