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7. SUMMARY AND RECOMMENDATIONS Based on analysis results, the - PDF document

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South 36,h Street Feasibility Study 7. SUMMARY AND RECOMMENDATIONS Based on analysis results, the conceptual plans shown in Appendix L represent the recommended design and configuration of the proposed improvements for S. 36,h Street, between N-370

  1. South 36,h Street Feasibility Study 7. SUMMARY AND RECOMMENDATIONS Based on analysis results, the conceptual plans shown in Appendix L represent the recommended design and configuration of the proposed improvements for S. 36,h Street, between N-370 and Cornhusker Road. 7.1 Study Findings and Recommendations Key findings and recommendations of this study are summarized as follows: ' S. 36'h Street is currently a four-lane divided cross section with turn lanes between Twin Creek DrivdSamson Way and N-370. lt is recommended that this cross section be continued north from Twin Creek Drive/Samson Way to the intersection with Cornhusker Road. ' With the recommended four-lane divided cross section for S. 36,h Street, the bridges over West Papillion Creek and Big Papillion Creek will need to be widened. Per the Bellevue Complete Streets Policy, a l0-foot trail on the west side and a S-foot sidewalk on the east side of the bridges are recommended. . Access to the Keystone Trail, West Papio Trail, and Marv Holubar Trail should be provided directly from the proposed trail on the west side of S. 36.h Street. I The Keystone Trail does not currently have direct access to S. 36*, Street. The Keystone Trail should be connected to the proposed S. 36,t Street trail on the west side near Cedar lsland Road, approximately 550 feet north of where the trail crosses under the road. r The West Papio Trail does not currently have direct access to S. 36o Street. This trail should be extended along the current service vehicle path that follows the top of the levee on the south embankment of the Big Papillion Creek. r The preliminary grade of S. 36,h Street at the Marv Holubar Trail access will be approximately 9 feet above the current grade. This will also require the trail to be raised 9 feet and the grade of the trail to be tied back into the existing grade along the current trail path. r A northbound right-turn crash pattern was identified at the intersection of S. 36s Street and Cornhusker Road. To reduce the potential for crashes, the approach angle of the channelized island for northbound right-turns should be altered or the island removed. I Northbound left-turn and southbound left-turn crash patterns were identified at the intersection of S. 36'h Street with N-370. The protected/permitted phasing for these movements should be converted to protect only phasing. This improvement could be implemented under the current intersection configuration before the roadway improvements are constructed. NDOT has jurisdiction over this intersection and the signalization. 7.2 Statement of Probable Construction Costs A Statement of Probable Construction Costs was developed based on the conceptual design discussed in Chapter 4 and shown on the Conceptual Plans in Appendix L. Construction costs from recent projects in the area were used to develop the cost estimate. At this conceptual level, quantities were grouped based on major construction items, including grading, surfacing, bridges, drainage, and right-of-way acquisitions. An estimate of 3.0 percent of the construction costs was used to approximate the amount of utility relocations required for the project. A contingency value of 20 percent of construction costs was then applied to the total to account for changes in quantities or to accommodate unknown conditions that may be identified during preliminary and final design. Based on these assumptions, the Probable Total Project Costs for widening this segment of S. 366 Street is approximately 927.4 million. Tabte 7- I summarizes the construction costs broken down by major items. Appendix N provides a more detailed summary of the anticipated quantities and construction costs. Page 3 6

  2. South 36.t Street Feasibility Study Table 7- 1. Statement of Probable Construction Costs $4,07 r,000 Grading Surfacing $3,s09,000 Bridges $8,743,000 $ r,980,000 Drainage Right-of-Way $ r74,000 Utilities (3% of Construction) $s49,000 Construction Cost Subtotal $ r9,026,000 Preli minary Engi neering (l 0% of Construction) $ r,903,000 Construction Engineering (l 0% of Construction) $ r,903,000 Contingencies (20%) $4,566,000 Total Probable Construction Costs $27,398,000 ANDERSON E-6139 rtu# 06t2712018 Page 3 7

  3. Cornhusker Road to Highway 370 36th Street Feasibility Study FACT SHEET The City of Bellevue and Sarpy County have identifjed the need to improve this segment of S. 36th Street to accommodate future growth Cornhusker Rd in traffjc volumes along this corridor and to address the fmoodplain conditions that result in water overtopping the roadway. The purpose of this Feasibility Study was to determine the number of lanes required on S. 36th Street to accommodate future traffjc, as well as the alignment and confjguration of the proposed improvements. Probable construction costs and quantities have also been developed. PROPOSED SCHEDULE KEY PROJECT FEATURES P 1.4 miles of 4-lane divided roadway 2 new bridges over West Papillion P Creek and Big Papillion Creek 10’ trail and 5’ sidewalk for bike & P pedestrian traffjc ENVIRONMENTAL CONSTRAINTS P New access to Keystone Trail and West Papio Trail Prepared by Design accommodates P 100-Year Flood Elevation ESTIMATED COSTS $19.0M Construction Cost + $ 8.4M Engineering & Contingencies CONSTRUCTION PHASING $27.4 Million Total Project Cost = 4-LANE CROSS-SECTION A 4-lane roadway provides acceptable levels of service for all segments in Year 2040 and will follow Bellevue’s Complete Street guidance.

  4. Cornhusker Road to Highway 370 36th Street Feasibility Study FOUR-LANE CONCEPTUAL DESIGN HIGHWAY 370 TO RAYNOR PARKWAY RAYNOR PARKWAY TO OLD 36TH STREET OLD 36TH STREET TO CORNHUSKER ROAD

  6. 36 th Street Improvements Highway N-370 to Cornhusker Road Feasibility Study Purpose To determine the impacts and costs of widening 36th street to a four-lane divided roadway

  7. Project Limits End Project 36 th Street Begin Project

  8. Environmental Constraints

  9. 2017 Average Daily Traffic 16,100 11,500 12,000 36 th Street

  10. 2040 Average Daily Traffic 20,800 13,900 16,700 36 th Street

  11. Traffic Analysis Summary • Evaluated 2-lane, 3-lane and 4-lane cross sections • 4-lane roadway provides LOS B for all segments in Year 2040 • 3-lane roadway on north end provides LOS E in Year 2040

  12. Traffic Analysis Summary • Evaluated 2-lane, 3-lane and 4-lane cross sections • 4-lane roadway provides LOS B for all segments in Year 2040 • 3-lane roadway on north end provides LOS E in Year 2040 • Follow Bellevue’s Complete Street guidance

  13. PLAN AND PROFILE

  14. PLAN AND PROFILE

  15. PLAN AND PROFILE

  16. Construction Phasing

  17. Conceptual Cost Estimate 36 th Street • 1.4 miles of 4-lane divided roadway Improvements • 2 new bridges • 10’ trail and 5’ sidewalk Highway N-370 • 100-year flood elevation to Cornhusker Road Estimated Costs: PROJECT SCHEDULE $19.0 Million Construction and $8.4 Million Engineering & Contingencies CONCEPTUAL COST ESTIMATE $27.4 Million Total 2021 2019 2020 2022 Preliminary Design Final Design/Permitting Anticipated Letting Begin Construction Right-of-Way Acquisition

  18. Date Submitted: Agenda Item Request 2/7/2019 Agenda Item Information Agenda Section: Agenda Type: Commissioners Regular Mark Meisinger, PE, PTOE, Felsburg Holt & Ullevig, (402) 445-4405 Speaker Information: Requesting Administration Date of Meeting: 2/12/2019 Department: Agenda Item: Presentation: 36th Street Feasibility Study Summary Summary/Background Information FHU to present the feasibility study which identified the need to improve the segment of S. 36th Street between Cornhusker Road to Highway 370. Identified needs were to accommodate future growth in traffic volumes along this corridor and to address the floodplain conditions that result in water overtopping the roadway. The purpose of this Feasibility Study was to determine the number of lanes required on S. 36th Street to accommodate future traffic, as well as the alignment and configuration of the proposed improvements. Probable construction costs and quantities have also been developed. Fiscal Administration Review Total County cost of Total cost is up to $27MM. Sarpy County's share has not been determined. project: Is the item funded in the current budget? NO.

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