Rainy Season Preparation & Storm Channel Maintenance

Transcription

1 Rainy Season Preparation & Storm Channel Maintenance

2 City Efforts Thorough Review of the storm water system Documentation of system conditions Now part of selection criteria or maintenance Full public report with recommendations Mayor City Council Senior Staff

3 El Niño Preparation Citywide All Hands effort Multiple and continuing face-to-face planning Extensive communication efforts - all-media

4 City Assets 2,774 miles of streets 48,000 drainage structures 700 miles of drainage pipe 15 storm water pump stations 84 miles of drainage channels

5 Channel Maintenance Purpose: Reducing flood risk Environmental permits required Master Storm Water System Maintenance Program (MMP) Channels selected 2 years in advance

6 Channel Locations Citywide Natural and concrete Large watersheds

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8 Channel Maintenance Council calls for a declaration of emergency Mayor requests declaration of emergency from the Governor of California United States Army Corps of Engineers issues the failure to act if unacceptable letter supporting emergency criteria

9 Master Storm System Maintenance Program Approved by the City Council in August 2013 Preferred planning approach not piecemeal Program Environmental Impact Report (PEIR) Coastal Commission issued a Coastal Development Permit Emergency efforts are clearly limited

10 Permit Requirements Special Studies: Hydrology Biological Assessment Noise Cultural Resources Water Quality Regulatory Permits Federal, State & Local

11 Emergency Criteria Imminent Threat (Army Corps Letter) Documented Risk Change in conditions Regional General Permit (RGP) 63 Minimum effort allowed and full mitigation required

12 Mitigation Requirements Sorrento Valley Wetland Creation and Enhancement offsite in Los Peñasquitos Canyon Preserve Rose Creek (Mission Bay High School) Wetland Creation and Enhancement offsite in Los Peñasquitos Canyon Preserve Murphy Canyon Creek Wetland restoration offsite at San Diego River south of Stadium San Carlos Creek Searching for appropriate mitigation Reservoir Drive Searching for appropriate mitigation Smythe Channel None required

13 Mitigation Requirements FY 16 Channel Maintenance Alvarado Creek Channel Wetland restoration offsite at San Diego River south of Qualcomm Stadium Tijuana River Valley Removal of invasive plants within and adjacent to the channel

14 Prioritization Field visits by crews Technical consultant analysis Public input Management team review Council Environment Committee review

15 Scoring Factors Flood risk management Water quality Public input Aesthetics

16 Winter Storm Preparations Non-stop continuous operation Pump station upgrades Storm drain repair and cleaning Channel cleaning

17 Before Soledad Creek After 17

18 Before Murphy Canyon Creek After 18 18

19 Alvarado Creek Transportation & Storm Water Department

20 When Storms Arrive More than 200 staff deployed Expanded after-hours staffing Portable pumps mobilized for tidal low points Road detours set as needed Hotline become primary contact point

21 Emergency CIP Beyond the capability of city crews Secure the site (isolate the area) Emergency Annual Allocation $1 million for unplanned events Public Works has authority for sole source emergency contract and manages contractor rotation list Contractor performs minimum repairs necessary to address the emergency After the fact permits

22 City Efforts Thorough Review of the storm water system Documentation of system conditions Now part of selection criteria or maintenance Full public report with recommendations Mayor City Council Senior Staff

23 Environmental Services Department Questions?