Technical Tools Update

SRF Sponsored Project WorkshopNovember 20, 2019

Technical Tools

• Iowa Storm Water Management Manual– https://www.iowadnr.gov/Environmental-

Protection/Water-Quality/NPDES-Storm-Water/Storm-Water-Manual

• Checklists– https://www.cleanwateriowa.org/urban– http://www.iowasrf.com/about_srf/sponsored-

projects-design-checklists/

River Restoration Toolbox

• Assessment Tool– Interactive spreadsheet– Illustrations & instructions

• Practice Guidelines– Detailed drawings– Specifications, photos– AutoCAD files

• Reviewable Checklist

River Restoration Toolbox

• Toolbox Training is ongoing– Level 1 - learning streambank stabilization and

restoration techniques, and how to use toolbox– Level 2 – focus on geomorphic design and

developing restoration techniques • https://www.iowadnr.gov/Environmental-

Protection/Water-Quality/River-Restoration/River-Restoration-Toolbox

Unified Sizing Criteria

• Clarify each criteria and how they are measured

• Reorganize and simplify• Example calculations• New graphics• Policy guidance• Complete Dec 2019

Detention Practices

• Dry, Extended Dry, Wet Ponds• New section on detention retrofits• Urban fisheries• Storage estimates and routing, outlet

controls• Complete Dec 2019

Permeable Pavement Systems

• Covers multiple permeable pavement surfaces

• More imagery, visual aids, and diagrams• Example calculations• Complete late 2019

Tree Trenches/Planter Boxes

• New practice for ISWMM• Ideal for dense urban areas• Sizing similar to bioretention• Part of treatment train• Complete late 2020

Other Updates

• Bioretention Cell – internal storage, soil mix• Calculation Spreadsheets• Water balance, channel routing, hydrologic

assessment• Native Landscaping• Pretreatment Practices• Underground Chamber Systems

Checklists

• Construction Inspection• SQR methods 1-8• Native Landscaping• Permeable Paver• Detention Basin

– Extended dry and wet pond

Paul Miller

paul.miller@iowaagriculture.gov

515-281-5833