1. Waterways Management Monthly Report Council Briefing December 12, 2012

2. Council Briefing Slide 2 Introduction Construction projects Maintenance activities Outreach and field visits Watershed studies Background information - easy to understand language Other topics, as requested Monthly Briefing to Council

3. Council Briefing Slide 3 Definitions Municipal Separate Storm Sewer Systems (MS-4) Watershed Implementation Plan (WIP) Total Maximum Daily Load (TMDL) – Chesapeake Bay “Pollution Diet” Low Impact Development (LID)

4. Council Briefing Slide 4 Definitions A 100-year storm (either tidal or rainfall): Has a probability of occurring once every 100 years 1% chance of happening in any given year Since these are probabilities, more than one 100-year storm can occur during any given period of time 10-year storm – used as design standard for sizing storm drain pipes because it more frequently occurs 100-year flood plain is the area adjoining a river, stream or watercourse covered by water in the event of a 100-year flood

5. Council Briefing Slide 5 Agenda Maintenance & Outreach August 2012 Flooding Projects & Studies Questions October 28, 2012 / Hurricane Sandy Grants, Agency/Community Outreach

6. Council Briefing Slide 6 Recent Flooding – August 2012

7. Council Briefing Slide 7 Understanding Tailwater Where Precipitation Runoff Meets Tidal Waters Recent Flooding – August 2012 TYPICAL SUBMERGED OR PARTIALLY SUBMERGED STORM WATER OUTFALL Tailwater phenomena causes rainfall and tidal flooding to be inextricably linked Precipitation Drainage pipe openingTailwater Ground Tidal Water Rain Water

8. Council Briefing Slide 8 Recent Flooding – August 25, 2012 Michael Woods – Outside of Flood Plain! Newmarket Square Newmarket Creek at Bellwood Road – At Capacity!

9. Council Briefing Slide 9 Recent Flooding – October 28, 2012 Hurricane Sandy Mill Creek - Phoebus Big Bethel Rd. & Todds Ln. N. Armistead Ave. Buckroe Fishing Pier

10. Council Briefing Slide 10 Recent Flooding – October 28, 2012 Hurricane Sandy Clearing Resort Blvd. Teach St. - Maintenance Buckroe Beach - Grading

11. Council Briefing Slide 11 Maintenance & Outreach Edgewood Backyard Drainage System Improvements Scones Inlet Repair Round Robin Flooding & Drainage

12. Council Briefing Slide 12 Maintenance & Outreach Site Visit – Sunset Creek Riverdale Civic Association 1000+ service calls from August 25 thru October 11, 2012 Todds Lane 24 inch HDPE Pipe Replacement

13. Council Briefing Slide 13 Maintenance & Outreach MS-4 Paint Spill Violation MS-4 Newmarket Creek International Coastal Clean Up MS-4 Presentation to Exchange Club

14. Council Briefing Slide 14 Projects & Studies Breakwater at Buckroe (Pilot Avenue) Buckroe Beach Nourishment

15. Council Briefing Slide 15 Projects & Studies Salt Ponds Inlet Hampton Tidal Floodplain Study & Protection Plan Watershed Studies Back River/Riverdale Hampton River East Buckroe & Riley’s Way Back River/Lake Shore Coliseum Lake Retrofit

16. Council Briefing Slide 16 Grants & Agency/Community Outreach Grants Awarded DCR Dam Safety $ 10,250 DCR Floodplain Management $ 8,500 DCR Local Program Dev. $ 43,550 NFWF Technical Assistance $150,000 CBT Living Shoreline $ 57,175 Grants Pending CBRF Living Shoreline $ 24,965 December 12, 2012 Ongoing Outreach City of Newport News Stormwater Ops City of Poquoson City Engineer US Army Corps of Engineers (Planning & Flooding) NASA/Langley (Environmental)

17. Council Briefing Slide 17 QUESTIONS ?