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Item 9BCITY OF SOUTH LAKE MEMORANDUM (April 2, 2013) To: Shana Yelverton, City Manager From: Robert H. Price, P.E., Director of Public Works Subject: Approve Contract Amendment No. 4 with Nathan D. Maier Consulting Engineers, Inc. for White Chapel Boulevard from State Highway 114 to East Highland Street in the amount of $53,316 Action Requested: Approve Contract Amendment No. 4 with Nathan D. Maier Consulting Engineers, Inc. for White Chapel Boulevard from State Highway 114 to East Highland Street in the amount of $53,316 Background Information: In October 2008, Nathan D. Maier Consulting Engineers, Inc. (NDM) was hired to design the North White Chapel Boulevard Improvement project from the intersection at State Highway 114 down to, and including, the intersection of Highland Street. The White Chapel Boulevard Improvement project design was for a standard four lane divided roadway with a raised and landscaped median. The original professional services agreement (design contract) in the amount of $264,859 included survey for the entire length of the project, design of the roadway, a hydraulic report of Dove Creek to properly size the proposed storm sewer box culverts near State Highway 114, determination of right of way needs and corresponding exhibits, geotechnical investigations to determine pavement design, and design for relocating existing water and sewer utilities within the corridor to accommodate the proposed roadway. The original design contract signed in 2008 was for the final design, bid documents and construction phase services of the White Chapel Boulevard Improvement project. NDM prepared and submitted conceptual design to the city for review of a conventional four -lane divided roadway using the existing centerline and taking right of way equally from both sides of the proposed roadway. It was later determined that the straight roadway alignment of White Chapel Boulevard should be shifted at the intersection of Highland Street so that no additional right of way will be required from the Southlake Church, due to the proximity of the existing building to the right of way. Since the property at the northwest corner of the intersection belongs to the City, there would also be a cost savings in the right of way acquisition by shifting the horizontal alignment of the roadway to the west. Supplemental Agreement No. 1, in the amount of $12,285 was approved by the City Manager in January, 2010 to revise the horizontal alignment of White Chapel Boulevard at the intersection of Highland Street to the west and add 2 feet of pavement on both sides of the road for bike lanes. The design fee for the revision also included revising the new typical sections of the roadway to include the additional 2' on each side of the road to accommodate bike traffic. NDM coordinated with design engineers for the White Chapel Countryside Office Park and made alignment recommendations for the city's waterline construction project along Highland Street, which is now complete. NDM had also revised the schematic layout at the intersection and submitted it to staff for review. Design had progressed to nearly 30% when the city suspended work on the roadway design to allow consideration of alternative traffic control methods at the Highland Street intersection. Traffic circulation issues at Carroll High School caused the staff to reconsider operation of the Highland Street intersection. Several different types of intersection control methods were evaluated to determine the most advantageous approach. A traffic engineering consultant looked at the costs and level of service (LOS) for two way stop control, four way stop control, traffic signal control, a single lane roundabout, and a dual lane roundabout. Staff has presented these options to members of the City Council and Planning and Zoning Commissioners at two Southlake 2030 work sessions. Summarizing those discussions, the two way and four way stop control intersection and the single lane roundabout will not efficiently handle the projected 2019 volume of traffic without excessive delay. Signal control would be useful during the morning and afternoon peak periods, but would not operate efficiently during the remainder of the day and would impose continuing maintenance and operation costs. The dual lane roundabout, does improve capacity at the intersection and creates the least delay for drivers of the options considered. Council and Planning and Zoning members of the 2030 committee directed Staff to move forward with the design of a dual lane roundabout at the intersection of North White Chapel Boulevard and Highland Street. Supplemental Agreement No. 2, in the amount of $173,827 was for the completion of design of White Chapel Boulevard along a revised alignment to avoid taking right of way from Southlake Church and included a dual lane roundabout at the intersection of Highland Street. The revised scope as outlined in Supplemental Agreement No. 2 included additional survey of up to 350' beyond the original limits of Highland Street and up to 500' north of Highland Street along White Chapel to accommodate the dual lane roundabout and the revised alignment of the intersection. The agreement also included landscaping and irrigation design of the proposed roundabout and the center medians along White Chapel Boulevard. Subsurface utility engineering work was to be performed in order to verify the location of existing water and sanitary sewer lines and any other private utilities within the corridor that will need to be relocated prior to beginning construction. The utility design included the relocation of existing sanitary sewer mains which will be in conflict with the new pavement. The drainage design was updated to incorporate the drainage from the new Countryside White Chapel Office Park development that has been constructed since the original drainage study was performed by NDM. Finally, the revised scope included final engineering plans, traffic control and sequencing for construction, contract documents, bidding of the construction project and construction administration. Supplemental Agreement No. 3, in the amount of $14,778 was for re -alignment of White Chapel Boulevard to tie-in to the White Chapel Boulevard Reconstruction project from Emerald Boulevard to Highland Street. Changes also included lowering the elevations of the roundabout subsequently resulting in the redesign of utilities to lower them as well. The revised scope for Supplemental Agreement No. 3 coordinated the connection point between the two separately engineered White Chapel widening projects. The White Chapel Boulevard Reconstruction project from Emerald Boulevard to Highland Street had a design that ended the pavement at a point 500 feet south of Highland and transitioned into the existing pavement. The design plans under this contract scope ended the pavement south of the dual lane roundabout and had a design transition to existing pavement at a point 500 feet south of Highland Street. Supplemental Agreement No. 3 eliminated the transitions in each set of plans and coordinated the matchline point. This caused for some alignment changes through the transistions to marry the plans. The roundabout was also lowered to eliminate a retaining wall at the roundabout along the Southlake Church property. The revised scope as outlined in Contract Amendment No. 4 includes design for 1,250 linear feet of a new 8 inch sanitary sewer gravity extension. The proposed line will run from approximately 400 feet south of Highland Street north to an existing lift station located at Countryside Court. The amendment also includes coordination services for right of way acquisition and additional right of way and easement document preparation. 8-inch Sanitary Sewer Design $12,086 Right of Way Acquisition Coordination $ 5,115 Additional Right of Way Documents $36,015 Reimbursable Expenses $ 100 Total Amendment No. 4 $53,316 The proposed amendment brings the total engineering design cost for the White Chapel Boulevard from State Highway 114 to East Highland Street Project to $519,065. The schedule going forward anticipates that the design will be completed summer 2013. Right of way acquisition is currently in progress and is anticipated to be completed late summer 2013. Relocation of the franchise utilities (electric, gas, phone, etc.) will begin when right of way is available and should be completed by early 2014. Staff anticipates the construction to be awarded in the 2nd quarter of 2014. Financial Considerations: Funds for the engineering design of the White Chapel Boulevard Improvement project are included in the previously approved Capital Improvements Program project budget. Strategic Link: The construction of the North White Chapel Boulevard Improvements project links to the city's strategy map relative to the focus areas of Mobility, Infrastructure and Performance Management and Service Delivery. The specific corporate objectives that are met by the construction of this project include: C2 - Provide travel convenience within the City and the region, B4 - Provide high quality customer service, and F2 - Invest to provide and maintain high quality public assets. Citizen Input/ Board Review: N/A Legal Review: This is the standard construction services contract that has been previously reviewed by the City Attorney. Alternatives: The Council may approve the Amendment to the existing Professional Services Agreement or deny it. Supporting Documents: Location Map Nathan D. Maier Consulting Engineers, Inc. Contract Amendment No. 4 Staff Recommendation: Approve Contract Amendment No. 4 with Nathan D. Maier Consulting Engineers, Inc. for White Chapel Boulevard from State Highway 114 to East Highland Street in the amount of $53,316 Staff Contact: Robert H. Price, P.E., Public Works Director Gordon J. Mayer, Jr., P.E., City Engineer Cheryl Taylor, P.E., CFM, Assistant City Engineer Steven D. Anderson, P.E., CFM, Civil Engineer NI 3DVld'd31N Nltl3NNll m1b NATHAN D. MAIER CONSULTING ENGINEERS, INC. Two Park Lane Place 8080 Park Lane, Suite 600 Dallas,TX 75231 March 25, 2013 (P) 214.739.4741 (F) 214.739.5961 Texas Reg. No. F-356 www.ndmce.corn Mr. Gordon J. Mayer, Jr., P.E. WBE/SBE/HUB Public Works Deputy Director City of Southlake 1400 Main Street, Suite 320 Southlake, TX 76092 Re: White Chapel Boulevard from E. Northwest Parkway (SH Il4) to E. Highland Street for the City of Southlake, Texas Supplemental Agreement No. 4 NDM Job No. 08-076 Dear Gordon: Attached please find the supplemental agreement for the above -mentioned project, as per our prior discussions. The modifications and additions as listed on the attached contract will provide the necessary revisions to the project to incorporate the additional ROW and easement exhibits, additional coordination with the City, and design of an additional wastewater line. We appreciate your help with this contract amendment, and thank you again for your business. Sincerely, NATHAN D. MAIER CONSULTING ENGINEERS, INC. BrianJ. LaFoy, P.E. Executive Vice President Attachment Approved: City of Southlake John Terrell Mayor EXHIBIT SA-4 Supplemental AL3,reement No. 4 FOR WHITE CHAPEL BOULEVARD FROM E. NORTHWEST PARKWAY (S.H.114) TO E. HIGHLAND STREET FOR THE CITY OF SOUTHLAKE, TEXAS This Supplemental Agreement No. 4 amends the original Scope of Services dated 10/14/08 to include additional wastewater line design services, ROW and easement acquisition coordination services, and additional easement exhibit preparation as previously submitted to The City of Southlake (The City) by Nathan D. Maier Consulting Engineers, Inc. (NDM). The proposed changes altering the original scope include: I. Wastewater Design Services NDM will prepare plan and profile sheets for approximately 1,250 LF of new 8 inch wastewater gravity line extension. The proposed limits of the new line are from approximately 400 ft south of Highland Street to approximate Sta 61+50. The proposed alignment will be under proposed pavement in the southbound lanes of White Chapel Blvd. Analysis of the existing lift station and force main for adequate capacity is not included in this scope of services. II. ROW and Easement Acquisition Coordination Services NDM will provide support services to the ROW and easement acquisition activities and will include the following items: ■ Preparation of ROW/easement exhibits for one (1) public meeting. ■ Attendance of one (1) public meeting. ■ Revisions to previously prepared ROW and easement parcel exhibits to correspond to a numbering format developed by the City. These revised documents will be signed and sealed by the RPLS. ■ Coordination with the ROW and easement acquisition services provider. III. ROW and Easement Exhibit Preparation NDM will prepare twenty-one (21) additional ROW/easement parcel exhibits for the project. These documents will include exhibits and descriptions, signed and sealed by an RPLS, for each parcel. Supplemental Agreement No. 4 For White Chapel Boulevard E. Northwest Parkway (S.H.114) to Highland Street Engineering Fees DESCRIPTION ENGINEERING FEE BASIC SERVICES Roadway Design $129,639 TOTAL BASIC SERVICES $129,639 SPECIAL SERVICES Survey Services $35,170 Hydraulic / Hydrology Study and Analysis $25,485 Waterline Replacement $19,455 Permitting $11,160 Construction Administration $12,470 Geotechnical Investigation $8,000 Reimbursable Expenses $2,900 Unit Costs $20,580 12 - Right-of-way dedication exhibits / Easement dedication exhibits - $1,715 each TOTAL SPECIAL SERVICES $135,220 SUPPLEMENTAL AGREEMENT NO. 1 $12,285 SUPPLEMENTAL AGREEMENT NO.2 BASIC SERVICES Roadway Design $79,735 SPECIAL SERVICES Survey Services $22,164 Drainage Design $7,254 Utility Design $4,654 Subsurface Utility Engineering $39,450 Landscape and Irrigation Design $12,500 Construction Administration $2,640 Reimbursable Expenses $2,000 Unit Costs ($1,715 per unit) $3,430 Additional ROW Dedication Exhibits Additional Easement Dedication Exhibits TOTAL FOR SUPPLEMENTAL NO.2 $173,827 TOTAL ENGINEERING $450,971 SUPPLEMENTAL AGREEMENT NO. 3 BASIC SERVICES Roadway Design $7,415 SPECIAL SERVICES Survey Services Drainage Design $530 Utility Design (Water Line Replacement) $6,608 Subsurface Utility Engineering Landscape and Irrigation Design Construction Administration Reimbursable Expenses $225 Unit Costs ($1,715 per unit) Additional ROW Dedication Exhibits Additional Easement Dedication Exhibits TOTAL FOR SUPPLEMENTAL NO.3 514,778 TOTAL ENGINEERING SO 749 SUPPLEMENTAL AGREEMENT NO.4 BASIC SERVICES Roadway Design SPECIAL SERVICES ROW 1 Easement acquisition coordination $5,115 Utility Design (8" wastewater gravity) $12,086 Reimbursable Expenses $100 Unit Costs ($1,715 per unit) $36,015 Additional ROW Dedication Exhibits Additional Easement Dedication Exhibits TOTAL FOR SUPPLEMENTAL NO.4 $53,316 TOTAL ENGINEERING