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Treatment Options Reviewed to Date:
#7) Eco Logic Original Tertiary Plant:
Further Study:
analysis still to be gathered...
Pre-Design Report
Total Capital Cost = $10,592,500.
Further Study:
analysis still to be gathered...
Pre-Design Report
Total Capital Cost = $10,592,500.
#9) CFT Original Tertiary Plant:
Further Study:
analysis still to be gathered...
Report and Proposal (5/19/08)
Total Capital Cost = $7,724,499.
Further Study:
analysis still to be gathered...
Report and Proposal (5/19/08)
Total Capital Cost = $7,724,499.
#11) AquaTech UV System:
Further Study Reveals:
Still Under Review
Further Study Reveals:
Still Under Review
stored wastewater to a tertiary level during snowmelt times when the BVWD storage reservoir
is in danger of overflowing. The BVWD outfall pump and pipe could be incorporated into the
transmission system. The LAWC facility could discharge directly to the creek at the base of
the Bear Lake dam. BVWD could move its outfall monitoring equipment to the site of the
LAWC discharge for dilution monitoring.
BVWD would probably have to add a UV disinfection mode at the discharge point.
BVWD would pay LAWC for use or availability of the plant. This payment would offset some or
most of the rate increase requested by LAWC. LAWC ratepayers would benefit from a lower
rate increase, and BVWD ratepayers would benefit by eliminating payment for construction of
a tertiary plant., although there would be some costs for transmission pipe construction, UV,
and use or availability.
Further study reveals:
You could figure $100 to $150/foot for the pipe to be conservative. As I don’t know the
elevation differential between the LAWC and BVWD plants, pumps may also be required
assuming the LAWC plant is higher as is usually the case.
If you are installing a 0.6 mgd UV system you are looking in the neighborhood of $500,000 to
$700,000. If you still wanted to use the chlorine you would have to install de-chlorination
facilities. In addition, Title 22/Tertiary treatment requires a certain amount of contact time at
certain minimum chlorine levels. I’m sure there would some plant modifications and the
discharge facilities required to make this work. How long can the LAWC plant be offline?
Please note that the Title 22/NPDES requirements are stricter than normal drinking water
requirements, believe it or not, so it would take quite a bit of study to make sure the LAWC
plant could meet the requirements if that’s the direction the District wanted to follow. --Gary
Ghio
Distance: 7250 feet as the crow flies, call it 7500 feet of pipe construction.
Elevation: LAWC plant is 240-250 feet above the BVWD outfall pipe discharge point, so
pumps required.
Roughly $2,000,000 plus engineering, site work, additional building construction for UV and
dechlorination, approval hassles and contingencies. Basically it's the same cost as the
original CFT estimate for a tertiary plant at the storage reservoir. This would require a lot of up
front money that we don't have to get it to the point of going for DPH (Dept. of Public Health) for
review - Most Board Members, the GM, and our BVWD Engineer agree that this option may
never get thru a DPH review. --Dave Ritchie
Total Capital Cost = $tbd.
#3) Additional Irrigation Acreage (see Boyle Report for more information)
#4) Manufacture Snow (see Boyle Report for more information)
#5a) Tertiary Treatment/Discharge (see Boyle Report for more information)
#5b) Interim Tertiary/Emergency Discharge (see Boyle Report for more information)
#6) Line Reservoir (see Boyle Report for more information)
#4) Manufacture Snow (see Boyle Report for more information)
#5a) Tertiary Treatment/Discharge (see Boyle Report for more information)
#5b) Interim Tertiary/Emergency Discharge (see Boyle Report for more information)
#6) Line Reservoir (see Boyle Report for more information)