stormwater data for asset management and...
TRANSCRIPT
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Stormwater Data for Asset Management and Decision-making
Peter Mattejat, PE
Environmental ManagerMarian Batton, GISPGIS Manager
Quarterly MeetingApril 18, 2018
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Agenda
• Overview
• Stormwater BMP (Current)
• Other Assets (On-Going)
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Overview - MDTA
• Safe + efficient transport via tolled highways, bridges, & tunnels
• Self funded with a Governing Board
• State agency in an environmentally progressive state
• Linear & highly impervious, close proximity to Chesapeake Bay
• Comply with stormwater NPDES permits (MS4 and Industrial Stormwater)
• Two recent mega roadway projects triple stormwater infrastructure …. more coming due to Chesapeake Bay TMDL Restoration
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MDTA’s Footprint
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Overview – MDTA Environmental
Environmental Assets
• Stormwater Best Management Practices
• Small Drainage (<48”) + Large Drainage
• Natural Resources (Trees, Stream Restoration, Wetlands)
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MS4 Phase II General Permit
• Covers Toll Highways + Campuses
• 2018 renewal + adds Chesapeake Bay TMDLs
• Manage stormwater Best Management Practices (BMPs) & drainage systems
Industrial Discharge General Permits
• Maintenance Facilities + Truck Weigh Stations
• 2014 renewal includes Bay TMDLs
• Interface with Office of Maintenance and Structures Division (drainage structures ≥ 36”)
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Overview – NPDES Permits
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Stormwater BMP - Geodatabase
• Inventory
• Inspection
• Remediation
• System Preservation
• Compliance Reporting
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Stormwater BMP - InventoryStormwater BMPs
• Footprints, drainage areas
• Attributes
• Existing, Proposed, Planned
Storm Drains
• structures, drainage areas
• Attributes
Impervious Area
Related Documents
• Site maps + photos
• Design plans & reports
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Stormwater BMP - Inventory
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Stormwater BMP - Inventory• ArcGIS Online (AGO) Dashboard
• Oversight of Inventory
• Multiple Users
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Stormwater BMP - Inspection
• Maximum 3-year cycle, more frequent for specific types
• Inspect newly constructed as part of As-Built certification
• Inspect post-remediation to log improved condition
• BMPs at Maintenance facilities require annual investigation
• Long-term monitoring / trends
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Stormwater BMP - Inspection
• AGO Collector Application
• Tablet and Smart Phone
• Assign Subsets of BMPs
0
10
20
30
40
50
Pond Infiltration Filtering
Ratings by Type
D
C
B
A
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Stormwater BMP - Remedial
• Preventative Maintenance
• Repair
• Rehabilitation
• Enhancement
• Abandon
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Stormwater BMP - Remedial
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Stormwater BMP - Remedial
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Stormwater BMP - Remedial
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Stormwater BMP - Remedial
AGO Collector Application – Tablet and Smart Phone
View Maintenance Needs
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Stormwater BMP - RemedialAddress Maintenance Needs
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Stormwater BMP - RemedialReport Other Needs
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Stormwater BMP – Asset Management• Life-Cycle Approach
• Data collection / evaluation
• System Preservation / Stormwater Compliance
• Integrate in highway setting
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Other Assets - Drainage
• Small Drainage - verify inventory & video inspection
• Drainage Outfalls - Assess for Restoration + TMDL credit
• Roadside Ditch - Assess for Restoration + TMDL credit
• Drainage Investigation Program
• Large Drainage – support system preservation
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Other Assets – Natural Resources
Tree Plantings
• verify installation & survivability
• Bay TMDL stormwater credits
• Bay Critical Area mitigation bank
Stream Restoration : 5-yr monitoring & repairs
Invasive Vegetation Management: inventory & remediate
Ecological Resources Bank: pending CAC
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Closing
Chesapeake Bay:Economic - Environmental – Cultural Resource