SUBJECT
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Approve Amendment No. 2 to Consultant Services Authorization (CSA) No. 22-088-01 with HNTB Corporation, (Consultant) to provide engineering services for the Cypress Parkway at Lake Marion Creek Road Intersection Improvements Project ($224,042.00 one-time expense).
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DESCRIPTION
On March 21, 2023, the Board approved CSA No. 22-088-01 with the Consultant to provide for professional engineering services to perform an alternatives analysis for improvements to the existing Cypress Parkway at Lake Marion Creek Road intersection at a cost not-to-exceed $102,255.00. The work effort included the evaluation of a single lane roundabout and a traditional mast arm signal. The draft alternatives analysis evaluation report was complete on August 3, 2023.
Due to potential for widening of Cypress Parkway and Johnson Avenue in the future, it was recommended that the intersection be evaluated and designed for an ultimate 4-lane configuration, based upon the anticipated 4-lane expansion of Cypress Parkway within the study limits. On December 5, 2023, the Board approved Amendment #1 at a cost not-to-exceed $54,255.00 to allow the consultant to utilize the results of the traffic analysis to develop one (1) conceptual intersection alternative for a 4-laned signalized intersection design and one (1) conceptual intersection alternative for a 2-lane roundabout design, bringing the total not-to-exceed fee to $156,510.00.
Upon reviewing the draft alternatives analysis evaluation report for the ultimate 4-lane configuration, the County determined that due to horizontal alignment and sight distance restrictions, conflicts with Marion Creek Estates Subdivision access, right-of-way impacts to SFWMD property and private properties west of Baker Dairy Road, it was recommended to modify the alternative analysis for the intersection, based upon a realignment of Lake Marion Creek Road within the study limits. This will avoid access impacts to the Marion Creek Estates Subdivision, Argos concrete, and Duke power station, will remove the sight distance, safety, and curve deficiencies at the existing intersection location and will limit right of way impacts to one property.
Amendment #2 is required to allow the Consultant to prepare conceptual design layouts for the intersection and perform geometric and operational analysis to establish the roadway geometry and lane requirements. The Consultant will develop one (1) conceptual intersection alternative for a 4-laned signalized intersection design addition and one (1) conceptual intersection alternative for a 2-lane roundabout design, based upon a realignment of Lake Marion Creek Road within the study limits. Upon preparation of the alternatives analysis evaluation report and identification of a recommended alternative, the County will select a preferred alternative for final design. This will increase the contract amount by $224,042.00 and will bring the total not-to-exceed fee to $380,552.00.
RECOMMENDATION
Request Board approve Amendment No. 2 to CSA No. 22-088-01 with the Consultant, resulting in a new total not-to-exceed contract amount of $380,552.00for the Cypress Parkway at Lake Marion Creek Road Intersection Improvements Project.
FISCAL IMPACT
Funds are available within the Roads and Drainage 5 Year CIP in the Transportation Millage Fund.
CONTACT INFORMATION
William G. Lorenzo, P.E
Project Management Section
(863) 535-2200
Jay M. Jarvis, P.E.
Roads & Drainage Division Director
(863) 535-2200