NPDES - NGPC and NOI Compiled.pdf

This document is an NPDES (National Pollutant Discharge Elimination System) filing containing the Notice of General Permit Coverage (NGPC) and Notice of Intent (NOI) compiled information for the Seismic Retrofit project on Haleakala Highway involving three bridges in Maui, Hawaii. The project encompasses seismic retrofit work on the Waiale Gulch, Alae (Naalae Gulch), and Pulehu Gulch (Pohakuokala) Bridges, with improvements including debris removal from piers, carbon fiber wrapping of piers, abutment backfill replacement with Controlled Low-Strength Material (CLSM), creep block replacement at bents, pier footing upgrades, pavement installation with markers, scour countermeasures near Alae Bridge Pier 1, temporary erosion control measures, and traffic control. The filing documents the contractor's compliance with general permit requirements for stormwater and pollution prevention during construction activities.

The NPDES documentation establishes the environmental compliance framework and obligations for the project, including stormwater pollution prevention plan (SWPPP) requirements and best management practices (BMPs) to be implemented during construction. The document outlines the permit conditions and monitoring requirements necessary for the contractor to discharge stormwater in accordance with federal Clean Water Act regulations. The NOI compilation demonstrates that the project proponent has provided proper notice to the Hawaii Department of Land and Natural Resources or appropriate regulatory agency regarding construction activities that may result in stormwater discharge, ensuring full environmental compliance and adherence to state and federal water quality standards throughout the seismic retrofit work.