The Vista Irrigation District (District) will be accepting proposals from qualified vendors to supply a skid mounted treatment system to remove iron and manganese from groundwater pumped by two existing wells located at the Lake Henshaw Resort, 26439 Highway 76, Santa Ysabel, CA. 92070.

The project involves the procurement of a skid mounted iron and manganese filtration system for the Lake Henshaw Resort (LHR) water system (Water System No. 3700900). The treatment system must be capable of treating up to 60 gallons per minute (gpm) of water produced by the LHR’s Wells No. 2 and No. 3 and reducing the iron and manganese concentration levels to below 0.01 milligrams per liter (mg/l) each.

There are two wells on the property that supply water to the system, Well No. 2 and Well No. 3. There is another well on the property (Well No. 1) that was taken out of service due to low production and elevated iron and manganese concentrations.

Wells Nos. 2 and 3 currently pump directly into a 63,865 gallon steel reservoir which feeds into the water system and also into a 58,205 gallon concrete reservoir, which also feeds into the water system. Well No. 2 pumps at approximately 11-12 gpm and Well No. 3 pumps at approximately 49 gpm. The water system has a maximum daily demand that was determined to be 25 gpm and on average the water system supplies approximately 9,000 gallons per day. It is envisioned that the new skid mounted treatment system will be installed near the steel reservoir and that Wells No. 2 and 3 will be connected to the treatment system and the treated water will then go into the steel reservoir (see Figure 1). Valving will also be installed as an option to bypass the steel reservoir and deliver treated water directly into the water system and the concrete reservoir.

The District intends to purchase a complete skid mounted treatment system with all the necessary components; installation of the treatment system and its connection to the existing water system (including providing the associated necessary fittings) will be performed by District staff. The District will evaluate each treatment system with an emphasis on efficiency, ease of operation and maintenance and not solely on the cost of the system.

Site visits if desired can be scheduled by contacting Richard Larsen, Vista Irrigation District Lake Henshaw/Warner Ranch Supervisor at (760) 691-9056 cell, or via email at rlarsen@vidwater.org.

RFP Lake Henshaw Resort Groundwater Treatment SystemAttachment 7_Well No. 2 Water Quality InfoAttachment 8_Well No. 2 Water Quality Info