Construction Stormwater Services in California
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Southern California Edison (SCE) is one of the largest electric utilities in California, serving more than 14 million people in a 50,000 square-mile service area of central, coastal, and southern California.

As a result of a broader awareness of water quality impacts, a new phase of laws and regulations have evolved in which permit requirements are highly dynamic, administration is more complex, and enforcement is more aggressive. SCE is on the front line in its pursuit to move beyond environmental compliance and to identify opportunities for continued performance improvement. The project objectives are to provide water quality planning, technical analysis, permitting, inspections, engineering design, quality assurance, and related environmental services.

Geosyntec’s Scope of Services

Geosyntec provides environmental and water permitting services to SCE for various projects. Our scope of work related to stormwater construction support includes the services described below.

Storm Water Pollution Prevention Plan (SWPPP) Development and Inspections

Geosyntec has supported the development of SWPPPs for more than 50 construction linear transmission and distribution projects. Services including SWPPP preparations, pre-construction photo documentation, filing of the Notice of Intent (NOI) and permit registration documents, annual reporting, and a notice of termination. Geosyntec also provides Qualified SWPPP Inspectors during construction. Our inspectors conduct a weekly inspection, train and delegate contractor personnel to conduct daily inspection of linear SWPPPs, document BMP maintenance, and ensure BMPs are installed and functioning per the SWPPP design.

Notice of Termination (NOT) Support

Geosyntec prepared NOT Plans for Tehachapi Renewable Transmission Project (TRTP) Segments and substations where NOT was delayed due to drought conditions. For Highwind and Whirlwind, Geosyntec also served as prime contractor implementing design plans and overseeing the construction and installation of the approved plans. The plans represent a sustainable approach that meets Revised Universal Soil Loss Equation, Version 2 (RUSLE2) and to establish a successional substrate for re-vegetation in the Mojave. Sites achieved NOT with an accelerated time frame, allowing SCE to eliminate Construction General Permit (CGP) compliance costs, due to Geosyntec’s successful creation and implementation of a comprehensive stabilization plan that met CGP termination criteria verified by RUSLE2 models.

Technical Drainage Studies

Geosyntec prepared a hydraulic and hydrologic analysis of existing drainage conveyance at Mohave (MOGS) Ash Canyon Closed Landfill and provided an assessment of the causes for ongoing erosion impacts and developed engineering recommendations to restore proper site drainage.

Quick Qual

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Project Summary

  • Location: California
  • Client: Southern California Edison
  • Project Practice Areas: Water & Wastewater, Environmental Management, Water and Natural Resources
  • Type of Facility: Transmission
  • Services Provided: Storm Water Permitting, Project Risk Determination, SWPPP Implementation and Construction Compliance Monitoring, Annual Reporting, Hydrology & Hydraulic Analysis, Final Stabilization & Project Close-out
  • Type of Work: SWPPP Development and Implementation
  • Governing Regulation: State and local