Contact Harris Environmental Consulting for your on-site wastewater, stormwater, erosion & sediment control or bushfire assessment needs.

02 4236 0954
info@hec.eco

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Bushfire Hazard Planning
- - - Subdivisions
    - Whenever a boundary is altered (made smaller or changed) in a residential or rural residential area planning controls for subdivision is required (if two or more existing lots are consolidated this is not considered a subdivision).
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  - - Strategic Assessment
    - Bushfire Assessments are prepared as part of a rezoning in a bushfire prone area.
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  - - Infill Development
    - An Infill Development involves new house, alterations and additions in pre-existing subdivisions.
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- - - Special Fire Protection Purpose Developments
    - Any proposals involving schools, hospitals, bed and breakfast accommodation, eco-tourism, housing for older people, retirement villages, childcare centres, music festivals are considered particularly vulnerable during bushfires and are therefore required to meet some specific requirements. In particular, an emergency/evacuation plan is considered an important component of the strategy to plan for any bushfire risk. The consent authority is the local council but only after the RFS has issued a BUSHFIRE SAFETY AUTHORITY.
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  - - Complying Development
    - Check your 149 certificate to see if you need a Bushfire Attack Level (BAL) risk assessment.
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Water Cycle Management
Stormwater Management
On-Site Waste Water Management
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Stormwater Management

We prepare Stormwater Management Plans for residential dwellings, sheds ect. The SMP is required by Council as a part of the documentation requirements for a development application. The SMP is focused on managing the quantity (volume and flow rate) of rainwater runoff from the property, primarily to prevent flooding and damage. Since new impervious surfaces like roofs and driveways increase the speed and volume of runoff, the plan usually mandates the inclusion of On-Site Detention (OSD) systems. The main goal of OSD is to ensure that the maximum stormwater discharge leaving the property does not exceed the volume or rate that occurred before development (pre-development discharge), particularly during significant rainfall events. Our civil engineer will design the size of the rainwater tank and soil absorption trenches using DRAINS to meet the specific council requirements.

Harris Environmental capabilities include:

Harris Environmental delivers practical stormwater solutions that balance development needs with environmental performance. Our team integrates hydrology, water quality, and regulatory compliance to design systems that work—on paper and on site.

What We Do

Stormwater quantity: Hydrologic and hydraulic modelling, drainage layout, and On‑Site Detention (OSD) sizing to manage peak flows, protect assets, and meet council requirements.
Stormwater quality: Water Sensitive Urban Design (WSUD) strategy and device selection with MUSIC modelling to achieve target pollutant reductions and demonstrate a Neutral or Beneficial Effect (NorBE) where required.
Soil and water management: Erosion and Sediment Control (ESC) plans—from concept to construction—aligned with local guidelines to prevent off‑site impacts.
Wastewater interface: On‑site wastewater assessments for unsewered sites, integrated with stormwater and soil management to ensure system compatibility and compliance.

Where We Work

From single dwellings and townhouse sites to subdivisions, commercial precincts, education facilities, and agricultural projects, we tailor stormwater solutions to scale—urban infill, greenfield release areas, and complex mixed‑use developments.

How We Deliver

Early feasibility and site investigations
Concept design
Detailed modelling and engineering design
Council and State authority compliance documentation
Development Application (DA) support and post‑submission refinements
Construction documentation and certification

QUICK LINKS

Bushfire Hazard Assessment

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On-Site Waste Water Management

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Call Harris Environmental
on 02 4236 0954
to discuss your project

Recent Projects

Water Cycle Management Study For Cemetry

A Water Cycle Management Study was prepared for a proposed prayer hall and cemetry with on-site wastewater management facilities.

Proposed Boarding House

With limited soil depth and available land, this project needed an Aerated Water Treatment System and 4 sand mounds.

SYDNEY OLYMPIC PARK – LAKE BELVEDERE

The 34m2 floating wetland was positioned to surround half the island (2 x 4m x 4m) and placed as close as possible to the eroding bank to allow roots to bind into the submerged sediment and dampen the currents that are eroding the island.

This required an on-site wastewater system incorporating a system design.