Title
Discuss and consider action to approve a Supplemental Agreement No. 3 with Johnson, Mirmiran & Thompson, Inc. (JMT) to provide additional professional engineering for the Kelly Lane Ph 2 Project in the amount of $455,311.85.
Summary
On August 27, 2019, the City Council approved a $1,157,068 professional engineering contract with (JMT) for design services of the Kelly Lane Ph 2 and Ph 3 Improvement Project. The scope of the initial contract included full engineering design for Ph 2 (from Falcon Pointe Boulevard to Moorlynch Ave.) and 30% schematic design for Ph 3 (from Moorlynch Ave. to Weiss Lane). Two subsequent Supplemental Agreements were executed: SA#1 for an alignment alternatives analysis for the east end of Kelly Lane Ph3, and SA#2 for additional geotechnical and subsurface utility evaluation services for both phases.
This agenda item is for approval of a Supplemental Agreement No. 3 (SA#3) with JMT to provide additional professional engineering services for the Kelly Lane Ph 2 Project.
Background:
Supplemental Agreement No. 3 is for professional engineering services related to increased design costs for Kelly Lane Phase 2 and expands the services to include construction phase services and construction materials testing. The increased costs result from additional work effort related to drainage, environmental permitting, additional utility design, utility coordination and related project management costs.
Drainage: Related to drainage, the current City’s Ordinance and Design Criteria for roadway crossings requires an assumption that the entire basin is fully developed, existing detention facilities do not exist and overtopping of roadways like Kelly Lane are not allowed for the 100 year storm event. Additionally, new rainfall frequency data has been updated by NOAA (National Oceanic Atmospheric Administration) published in NOAA’s Atlas 14 that increases rainfall values used for infrastructure design under federal regulations. Within Kelly...
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