Hillcrest Creek Assessment

Image of Hillcrest Creek Summary of report findings

Hillcrest Creek catchment is largely developed to capacity primarily for residential use with small areas of open space, commercial, (light) industrial; and bush land use. Discharging to Shoal Bay, the stream is one of the most modified amongst those surveyed and has considerable lengths of piped and lined channel.

Length		6.6km
Size Of Catchment		380ha
Vegetation Cover		11% (43.5ha), generally sparse throughout the catchment.
Imperviousness		39%
District Plan Land Use	Business	2%
	Recreation	11%
	Residential	68%
	Road	15%
	Special Purpose	4%
Recreational Use		Low, no significant known public use.
Receiving Environment		Shoal Bay
Substrate		Predominantly artificially lined.
Natural Wetlands		Nil
Artificial Wetlands		1
Periphyton		Significant densities throughout.
Macrophytes		Possible management issues in Tributaries 3 + 4.
Macroinvertebrates		Moderate compared to other North Shore streams.
Fish		3 species of native fish + koura.
Potential Man-Made Barriers to Fish Passage to Upstream Habitat		6
Channel Modification		Highly modified with extensive channel lining and piped lengths.
Erosion around Structures		8 structures with slight erosion + 3 with moderate erosion.
Bank Erosion		Minimal throughout due to lined and reinforced banks, except for significant erosion in the lower main channel and Tributary 3.
Temperature		Generally low although likely to be higher during summer months.
Suspended Solids, Turbidity And Visual Clarity		Clarity, turbidity and suspended solids all low.
Oxygen and Oxygen Demand		Overall low oxygen levels and elevated oxygen demand.
Nutrients		Limited information available.
Contaminants		Zinc concentrations may be elevated.
Bacteria and Pathogens		Levels of indicator bacteria indicate the stream water is not suitable for contact recreation.
Sediment Quality		No data.
Debris		Moderate amounts of inorganic debris and minimal organic debris.
Stream Grouping	Group 2, High value low disturbance	7%
	Group 3a, Urban semi-modified	16%
	Group 3b, Urban modified	13%
	Group 4, Concrete lined channel	38%
	Group 5, Piped section	24%

» Do It Online

All Services

Pay itMake an online payment to Council.: Dog Registration; Pay Animal Fines; Pay General Rates; Pay Library Fines

Say it: Contact Council

Join itSubscribe to various digital services.: Join Shore Libraries; No Spray Register

Request itMake a request to council.: Order A LIM; Order A Property File; Order A Solicitor's Report

Report itNotify us of any important issues.: Report A Found Dog; Report A Lost Dog; Report A Problem

Find itFind out information from council.: Building Consent Status; Cemetery Search; Food Grading Search; Lost And Found Dogs; Rubbish Collection Search; SafeSwim (Water Quality); Suburb Search

Submit itLodge an application with council.: Building Consents Login; Lodge A Design Plan

Make Our Website Talk

Hillcrest Creek Assessment

Internal Links

Hillcrest Creek Report

Hillcrest Creek Maps