CSA79 Green Valley Lake

Green Valley Lake is located north of San Bernardino National Forest.  Ground elevations are in the range of 6800’ to 7200’ above Mean Sea Level. Soil is fertile and vegetation comprises of California Oaks and manzanita bushes. Geological features comprises a variety of mineral deposits like limestone, salt, shale, clay, gypsum and iron.

The CSA 79 wastewater collection system was originally constructed in the late 1970’s as a result of an agreement between CSA 79 and the Running Springs Water District for Running Springs to treat CSA 79 sewage on May 6, 1997.  Modification and additions to the collection system and lift stations have occurred over the years to maintain adequate capacity and keep up with local growth.

The primary sources of water is from groundwater pumping and is pumped and distributed to customers by the Green Valley Water District.  A few residents, including campgrounds and churches, have unmetered private wells in the service area.

Wastewater is collected in a network of sewers and manholes and transported via sewer mains, two main line lift stations, and force mains to the Running Spring Wastewater Treatment Plant for treatment.

The Green Valley Lake area generally receives about 23½ inches of precipitation annually on average and is considered a moderate climate. Surface runoff can be substantial in the spring months due to snow pack melt.  Surface runoff discharges to Green Valley Lake which spills to Green Valley Creek, an upstream tributary to the Mojave River.

The population of Green Valley Lake (2000 census) is 1860, and consists of primarily families, with an average household size of 2.5 people per owner-occupied unit.  Approximately 95% of the households are occupied year-round.  There are 759 total housing units out of which 735 are occupied.  Currently there are no known future projects planned that would add customers to the sewage collection system.  County Service Area 79 provides wastewater collection services to 1,096 single-family housing units and 6 commercial accounts.

The facilities consist of approximately 35 miles of small diameter gravity sewer mains (6-inch to 10-inch) and 481 manholes.  In addition, there are two collection lift stations (Canyon Station and Crab Flats) and two transmission lift stations (Ahwahnee and Deerlick).  The collection system discharges to the Running Springs WWTP owned and maintained by the Running Springs Water District.  The Running Springs WWTP is designed for a maximum flow of 0.75 MGD of which CSA 79 is allowed to contribute a maximum average daily flow of 0.43 MGD.  There are three contributors of flow to Running Springs WWTP:

1.     Running Springs

2.     Arrowbear

3.     CSA 79 (Green Valley Lake)