Irvine Ranch Water District
http://www.irwd.com/environment/natural-treatment-system/natural-treatment-site-turtle-ridge.html
Natural Treatment Site: Turtle RIdge
This facility functioned through-out the year with minor interruptions. The system was drained twice during the year to minimize sulfide and algae production, sediment removal, and the installation of a circulator unit at the outlet. The overall appearance of the site is pleasing to the eye with landscape and irrigation maintenance meeting IRWD performance standards.
Major repairs and improvements such as fence post and cable replacement, aquatic vegetation removal and container plant replacement were performed. Water quality monitoring showed adequate removal rates and load reduction for nitrogen, phosphate, suspended solids, and total coliform. There was an increase in Selenium; however, the increase is within the variability of the analysis and sample collection procedures.
Turtle Ridge
Location: 157.5 Shady Canyon, Irvine CA 92612
Size: 1.9 acres
Tributary Watershed: 229 ac
Status: On line, March 2006
Turtle Ridge
Biological Values:
The establishment of riparian and upland habitats, facilitated by a sustainable water source, has brought about an increase in wildlife usage, by providing breeding, nesting, cover and forage areas.
Twelve species of birds were observed nesting at the site, including: Bewick’s Wren, House Wren, Mallard, Western Bluebird, House Finch, Black Phoebe, Tree Swallow, Common Yellowthroat, Song Sparrow, American Crow, and Nutmeg Mannikin.
Additional observations of flora and fauna will be added with each annual report.
Turtle Ridge
Routine Maintenance Activities:
- TruGreen LandCare provides routine irrigation and landscape maintenance services at the site. Additional work such as mulch replacement, irrigation repairs, aquatic herbicide application, aquatic vegetation removal, and sediment removal were performed throughout the year.
- System operations staff performed weekly site inspection, water quality monitoring, and landscape and irrigation maintenance review.
Major Repairs: Repairs were performed on the perimeter cable fence.
Major Improvements: Circulator installed to facilitate sulfide and algae reduction.
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