1. Low Impact Development Training: Planning Exercise Presented by: The Low Impact Development Center, Inc. A non-profit water resources and sustainable design organization www.lowimpactdevelopment.org

2. Application of Concepts New and Redevelopment Identify Opportunities and Constraints Identify IMPs Discuss Results Objectives

3. LID UFC Process Define Planning Goals Perform Site Evaluation Develop LID Strategies Prepare LID Concept Design Target O & M Strategy

4. Four Phases for LID Planning Phases for New and Repair/Demo Projects Phase 1. INSTALLATION WIDE LID ASSESSMENT MEETING Phase 2. SITE SELECTION Phase 3. CONCEPTUAL SITE DESIGN Phase 4. SITE RESTORATION STEP 1 OBJECTIVES; OPPORTUNIES STEP 1 OBJECTIVES; OPPORTUNIES STEP 2 SITE SELECTION STEP 2 SITE SELECTION STEP 3 CONCEPT SITE DESIGN STEP 3 CONCEPT SITE DESIGN STEP 4 SITE RESTORATION STEP 4 SITE RESTORATION NEW CONSTR. REPAIR DEMOLITION INSTALLATION PLANS INSTALLATION PLANS AREA PLANS AREA PLANS SITE PLANS SITE PLANS PLANNING PRODUCTS APPLIES TO THESE PRODUCTS

5. Rehabilitate parking and circulation Construct new warehouse/office Integrate facilities Program

6. Phase 1. ANNUAL LID ASSESSMENT MEETING Annual Meeting: 1. Meet w/ EV, CI to understand SW Regulations 2. Understand LID objectives and reporting 3. Review installation map; identify environmental resources, buffer requirements, soils 4. Overall drainage systems (natural & man-made) 5. AM & EV develop LID opportunities map? NEW CONSTR. REPAIR DEMOLITION STEP 1 OBJECTIVES; OPPORTUNIES STEP 1 OBJECTIVES; OPPORTUNIES STEP 2 SITE SELECTION STEP 2 SITE SELECTION STEP 3 CONCEPT SITE DESIGN STEP 3 CONCEPT SITE DESIGN STEP 4 SITE RESTORATION STEP 4 SITE RESTORATION INSTALLATION PLANS INSTALLATION PLANS AREA PLANS AREA PLANS SITE PLANS SITE PLANS APPLIES TO THESE PRODUCTS Goal: understand and communicate basewide LID strategies, opportunities & constraints

7. Development and Redevelopment Use VA for development and MD for redevelopment example goals EISA comparison Common Stormwater Goals

8. % Imperviousness (assume 65%) Rainfall Depth/ESD Runoff Depth QE = PE*Rv 0r ~1.24” Post Cn > Pre and PE>1 inch so calc Cpv Approx 0.4 inch depth over surface so if 30 acres then 4,500 cf Virginia Key Points

9. Maryland Key Points Redevelopment (Assume 40% imperviousness): Reduce Impervious area by 50% or, ESD/LID for wq for 50% or, ESD and reduction for 50% OR On-site structural or, Off-site structural for 50% or, Or Combination OR Retrofit off-site Stream restoration Trading Planning AND… Implement ESD for NET INCREASE in impervious areas

10. EISA 438: Norfolk 95 Th Percentile 1.63 Inches

11. UFC Tools LID Manual NRCS Charts 95th Percentile Charts

12. PHASE 2. SITE SELECTION - new site/ new construction Meet w/ EV, CI to identify 1.Review obj., reg., opportunities, and LID assessment from Step 1 2.EV identify wetlands, rivers, streams, vegetative buffers, steep slopes, and erodible soils 2. CI or EV identify current hydrologic conditions (permeable and impermeable soils, vegetated areas 3. CI or EV identify natural and existing drainage systems 4. AM create building envelopes map where development can occur with least impact Goal: Choose best site w/ least impact STEP 1 OBJECTIVES; OPPORTUNIES STEP 1 OBJECTIVES; OPPORTUNIES STEP 2 SITE SELECTION STEP 2 SITE SELECTION STEP 3 CONCEPT SITE DESIGN STEP 3 CONCEPT SITE DESIGN STEP 4 SITE RESTORATION STEP 4 SITE RESTORATION NEW CONSTR. REPAIR DEMOLITION INSTALLATION PLANS INSTALLATION PLANS AREA PLANS AREA PLANS SITE PLANS SITE PLANS APPLIES TO THESE PRODUCTS EV checklist Site Approval

13. Copyright 2009 Low Impact Development Center, Inc.

15. Slide is blank What are LID, Environmental, and SWM Issues?

16. Disconnectivity, bioretention, etc.. Copyright 2009 Low Impact Development Center, Inc.

17. Pavers and roof Copyright 2009 Low Impact Development Center, Inc.

18. What are issues with new area? Slide is blank.

19. Copyright 2009 Low Impact Development Center, Inc.