STORM-WATER MANAGEMENT

Lawrence & Associates' civil engineers and hydrologists assist our clients with a wide variety of storm water related issues:

Flood and Peak Flow Modeling

• Flood plain analyses using HEC-1 or WMS and HEC-RAS modeling is used to establish flood plain in unmapped areas and evaluate effects of construction within the flood plain
• WMS or FLOW (City of Redding) to calculate peak flow and storm-water detention requirements for larger subdivisions
• Rational and similar methods to calculate peak flow and detention for smaller sites

Regulatory Compliance

• Storm Water Pollution Prevention and Erosion Control plans for construction
• Storm Water Pollution Prevention Plans for site operation
• Statewide industrial storm-water discharge permitting
• Reports of Waste Discharge (ROWD)
• Individual National Pollution Discharge Elimination System (NPDES)
• Best Practicable Treatment and Control (BPTC) plans
• Storm Water sampling and reporting
• Spill Prevention Control and Countermeasure Plans (SPCCs).
• State dredge and fill permits, technical reports, and applications.
• Army Corps of Engineer's 401/402 dredge and fill permits
• California Department of Fish & Game stream-bed alteration permits

Design

• Parking, grading, and drainage
• Onsite storm water detention or retention
• Spill containment
• Storm water treatment facilities
• Porous pavement design