Loading...
HomeMy WebLinkAboutDocumentation_Workshop_Tab 05_03/04/2019Memorandum To: Honorable Mayor and Village Council From: James M. Weinand, Acting Village Manager, Administration Date: February 20, 2019 Subject: Water Distribution System Report While conducting research on the condition of the water distribution system concerning a main replacement program, Tom Jensen with Kimley-Horn and Associates provided me a copy of the Water Distribution System Facility Assessment Report, which was complete in 2011. This report is out dated as of now but it contains some very valuable information and recommendations on the system. The water distribution system consists of 400,000 LF (75 miles) of 4" to 16" AC, PVC and DI pipe. The oldest portions of the system was installed in the 1950's and expanded as development occurred. The first priority is to replace approximately 150,000 feet of Asbestos -Cement (AC) pipe, which is 50 plus years old. The engineer has recommended an AC pipe replacement program to coincide with other infrastructure projects. Such as storm water, sewer, sidewalks and roadwork. The next area of concern is the Ductile Iron (DI) pipe, which was installed post 1970's. Tests have shown signs of substantial build up on the interior of the pipe. The engineers have stated that some of the areas tested are due for replacement and most likely, other areas of the same relative age are in the same condition, more testing is recommended. The recommendation is to replace the DI pipe after the AC pipe. The system has two inter -coastal waterway crossings: 1. State Road 707, 10" ductile iron pipe laying on the bottom of the inter - coastal river installed in the late 60's has a test leak rate of 2.3 gallons per minute, (3,312 gallon of water a day). We have reached out to our engineers to provide us with a new leakage test to confirm this data. 2. Jupiter Point Marina, 12" ductile iron pipe laying on the bottom of the inter -coastal river. This pipe cannot be leak tested because of a missing or not installed isolation valve. The system has three river crossings: 3. Tequesta Drive Bridge, 12" HDPE pipe installed in 2009. No leakage noticed on this pipe. 4. Crosses the North Fork River at the west end of the County Line. No leaks noted. 5. Installed on the County Line Bridge. No leakage noticed. Other Water Distribution System Facility Assessment Report Recommendations: A. Establish a valve exercise and fire hydrant maintenance program for the distribution system. Records indicate that exercising and flushing of the system has been implemented, but it is not organized. B. A distribution map needs to be developed with a complete valve and hydrant numbering system. The system should be divided into sections and each valve and fire hydrant should be exercised every five years. This report stated every five years, however my recommendation would be to test these fire hydrants annually. C. The subaqueous crossings should be inspected every year, due to their age. D. A maintenance program and database needs to be developed for the meters on the system; 10% of the meters should be tested on an annual basis. In addition to the recommendations made in the Water Distribution System Facility Assessment report, a program needs to be development for inventory, inspection and testing of the systems back -flow prevention devices. Distribution personnel are in need of the proper training and certifications for installation and testing of the back -flow prevention devices on the water distribution system. In addition to the training, additional equipment is needed to effectively exercise all the valves in the distribution system in a timely and efficient manner. Proper and effective maintenance on the system should result in fewer truck rolls for customer service issues and provide a measurable degree of efficiency for water production and distribution. The engineers recommended a 20-year replacement plan, with an approximate price tag of $27,250,000.00. This value placed on this project was based on labor, materials, equipment, contingency and engineering in 2011 dollars.