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MEMORANDUM
TO: Board of Supervisors
FROM: Scott De Leon, Public Works Director
DATE: April 23, 2019
SUBJECT: Approve Amendment One to the Agreement for Construction Management Services for Robinson Creek Bridge at Mockingbird Lane with MGE Engineering, Inc. in the amount of $20,956.46 with a new contract not-to-exceed total of $261,943.36 and authorize the Chair to sign
EXECUTIVE SUMMARY:
On June 5, 2018, the Department of Public Works entered into an agreement with MGE Engineering, Inc. (MGE) for construction management services for the replacement of Robinson Creek Bridge at Mockingbird Lane (14C-0086).
For your Board's consideration is Amendment One to that contract, which provides for the cost of additional inspection services, and increases the contract amount by $20,956.46 to a new not-to-exceed total of $261,943.36. The additional work performed by MGE was related to the contractors accelerated schedule, which was required because of the following delays:
Biological monitoring survey prior to the demolition of existing bridge led to the discovery of an active pacific-slope flycatcher (Empidonax difficilis) nest, under the bridge, containing two (2) chicks. Consultation with the California Department of Fish & Wildlife (CDFW), as required by the Streambed Alteration Agreement, resulted in establishment of a 100-foot non-disturbance buffer zone around the nest where no construction activity would be permitted until the chicks had fledged. As a result, all construction activities were halted effective July 11, 2018.
On July 25, 2018, a subsequent biological monitoring survey confirmed that the nest was no longer active; however, it led to the discovery of approximately fifteen (15) bats (Myotis sp.) and one (1) big brown bat (Eptesicus fuscus) roosting in a crevice under the existing bridge deck. CDFW required that a Bat Exclusion Plan be submitted and then implemented upon approval.
Subsequent to the discovery of the bats, but prior to...
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