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25D - AGMTS FOR SUBSURFACE IMAGING
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25D - AGMTS FOR SUBSURFACE IMAGING
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Last modified
9/10/2020 5:12:04 PM
Creation date
9/10/2020 4:44:55 PM
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City Clerk
Doc Type
Agenda Packet
Agency
Public Works
Item #
25D
Date
9/15/2020
Destruction Year
2025
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T2 staff led Utility Engineering services on this Sacramento Municipal <br />Utility District (SMUD) project that involved 3.3 miles of transit lines from <br />Civic Center to Midtown. Streetcar stations were spaced every few blocks <br />and two maintenance facility sites are located along the alignment. <br />T2 crews provided SUE services for approximately 150,000 LF of existing <br />utilities including locating, surveying and mapping (Quality Levels D, C <br />and B). Civil 3D was utilized to process field data, generate a Subsurface <br />Utility 3D Model and incorporate 3D elements of existing pipes. This was <br />completed after the pipes were exposed by vacuum excavation. The field <br />data was compiled in the office with CADD, incorporating depth, size and <br />invert data. <br />T2 staff also performed conflict analysis, utility coordination and non- <br />destructive vacuum excavation (Quality Level A) of over 125 test holes <br />within a highly congested area of downtown Sacramento. <br />The Port of Long Beach is reconfiguring, expanding and enhancing the existing Pier B rail facility located <br />southwest of West Anaheim Street and the 710 Freeway. The improved facility will support more efficient <br />use of "on -dock" rail at the Port's shipping terminals, which will ease roadway traffic congestion and <br />improve air quality. Approximately 171 acres to be impacted during construction. <br />T2 staff provided full SUE services to support design of this major new <br />rail system for Pier B, including utility designating, survey and test hole <br />services (ASCE 38-02 Quality Levels D, B, C and A). The scope <br />included investigation and mapping of over 400,000 LF of subsurface <br />utilities, survey of the designated utilities and preparation of ASCE 38-02 <br />compliant deliverables. Following review of the updated Utility Map, the <br />decision was made to complete utility trenches in place of traditional test <br />holes, due to extremely heavy utility congestion. T2 crews completed 10 <br />utility trenches, ranging from 80' to 120' in length, to obtain precise <br />horizontal/vertical utility position information, across major cargo <br />transportation roadways. <br />T2 staff successfully overcame several project challenges including <br />coordination and scheduling with the Port, traffic control, tenants and <br />stakeholders to minimize disruption to operations; safe implementation <br />of traffic control setups and field work in highly congested areas; and <br />restricted work times requirements. <br />T2 staff provided electronic designating, ground penetrating radar (GPR), locating (ASCE 38-02 Quality <br />Levels D, C, B and A) SUE (potholing) and utility mapping services. Crews also provided soil sampling <br />services due to contamination issues. T2's services were completed on time and within budget. <br />1. STATENDQ&LIFICATIONS 112 <br />
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