TITLE
Recommendation to adopt resolution authorizing City Manager, or designee, to execute a contract, and any necessary documents including any subsequent amendments, with California Surveying and Drafting Supplies, Inc., of Sacramento, CA, to furnish and deliver Trimble Alloy Global Navigation Satellite Systems, base station receivers, hardware and related software for subsidence monitoring activity, in a total annual amount not to exceed $140,000, for a period of two years. (Citywide)
DISCUSSION
City Council approval is requested to enter into a contract with California Surveying and Drafting Supplies, Inc. (CSDS), to furnish and deliver Trimble Alloy Global Navigation Satellite Systems (GNSS), base station receivers, hardware, and related software for subsidence monitoring activity.
The City of Long Beach (City) Energy Resources Department (ER) monitors surface elevation for oil field-related subsidence control through 14 permanent, City-owned Trimble Global Positioning System (GPS) base station receivers that collect surface elevation data in real-time. This information is augmented by the semi-annual mobile surveying of 240 GPS benchmarks collected from 5 portable Trimble GPS R-10 rover receivers. From 2010 through 2012, ER replaced its GPS receivers with Trimble NetR9 base station receivers and Trimble R8 rover receivers. Currently, the GPS hardware is two years beyond its designed life expectancy. Firmware updates are no longer available for the current GPS hardware, and existing hardware cannot see newly launched GPS/GNSS satellites.
In 2020, ER conducted a technical evaluation of its Real-Time Network (RTN) and determined that the RTN software and equipment in use at that time was in need of replacement. The software was incapable of being upgraded and required replacement. ER determined the upgrade would be divided into two phases:
Phase 1: GPS base station receiver replacement - 7 stations
Phase 2: GPS base station receiver replacement - 7 sta...
Click here for full text