Rosendahl Reservoir, Port Macquarie, NSW, Australia
S 31° 27.650 E 152° 53.989
56J E 490482 N 6519320
Work for the building of the 'Rosendahl Reservoir' began in 1950, and is officially called 'Port Macquarie Off-Creek Storage Dam'.
Water is taken from the Hastings River to fill the dam.
Dam viewing / picnic area with BBQ: S31º 27.634' E152º 53.947'
Waymark Code: WMP0QZ
Location: New South Wales, Australia
Date Posted: 06/05/2015
Views: 2
The Port Macquarie (and Cowarra) storage dams are filled by water harvested from the Hastings River at Koree Island, 5 km south-west of Wauchope.
"In 1970, Port Macquarie Municipal Council constructed the small 90 ML dam below Transit Hill, known as O'Brien's Dam. The 2,500 ML Port Macquarie Dam (Rosendahl Reservoir) was constructed just downstream of O'Brien's Dam. It was completed in 1978 by the then NSW Public Works Department. O'Brien's Dam is no longer used for water supply and now captures stormwater.
FAST FACTS
Gross Capacity: 2,500 ML
Full Supply Level: 23.85 m (Above Sea Level - ASL)
Catchment Area: 110 ha
Surface Area @ FSL: 30 ha
MAIN EMBANKMENT
Type: Earthfill with clay core and sand filters
Volume of Material: 325,000 cubic metres
Height: 22 m
Length: 230 m
Width at Top: 6 m
Width @ Base: 120 m
OUTLET TOWER
Type: Square concrete tower (2.8 m2)with vertical openings for selective withdrawal of water
Access: By Boat
Outlet works: Steel pipe 1000 mm dia inside a 2m square reinforced concrete culvert 136 m long, under the main dam embankment.
SADDLE DAM
Type: Homogenous Earthfill
Volume of Material: 12,500 cubic metres
Height: 4 m
Length: 260 m
Width at Top: 6 m
Width @ Base: 25 m
SPILLWAY
Type: Open trapezoidal channel with concrete crest weir
Width: 12 m
Outlet: Channel: Grassed channel discharging into upper tributary of Innes Lake Nature Reserve
Waterway where the dam is located: Intermittent Stream
Main use of the Water Dam: Water Supply (Drinkable)
Material used in the structure: embankment
Height of Dam: 22
Fishing Allowed: no
Motor Sports Allowed: no
Date built: Not listed
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