Please see the attached memo for additional project background and information.

Transcription

1 Agenda Bill City Council tudy ession March 13, 018 UBJC: DA UBMID: March 07, 018 DPARMN: Issaquah Fall City Road - 4nd to Klahanie DR, Project Update Public Works NDD FROM COUNCIL: Action Direction Informational RCOMMNDAION: XIBI: BUDG: Receive project update and discuss road closure and construction options. 1. xhibit 1 - IFCR Council Memo. xhibit - IFCR Vicinity Map 3. xhibit 3 - IFCR Council Presentation otal dollar amount $0 Approved in budget Fund(s) N/A Budget reallocation required No budgetary impact WORK AN FOCU ARA: ransportation Communication & ngagement igh Performing Government nvironmental ealth & Protection Community afety Community Livability Culture & Recreation Financial ustainability IU BFOR COUNCIL: hall Council reconsider closing Issaquah Fall City Road during construction of the bridge? KY FAC AND INFORMAION UMMARY: he Issaquah Fall City Road project will widen the Issaquah Fall City Road corridor between 4nd Ave to Klahanie Dr from two to four lanes and construct roundabouts at the 4nd, 47th, and Klahanie intersections. he project design also includes a bridge over the North Fork Issaquah Creek, bike lanes, sidewalks, and a pedestrian crossing to Pacific Cascade Middle chool.

2 he project team has achieved a 60% plan design level, however project costs have risen due to unfavorable construction finance trends (including a 7.8% increase in national annual project construction costs) and a finding of poor soils at the bridge foundations. he project team has worked to reduce project costs by refining the existing design and looking at a redesign of the bridge superstructure to eliminate a row of girders. he team has identified an estimated $3.9 million in costs savings if the bridge is built with a full road closure between 47th and Klahanie Dr.. Additional sequencing details will be provided at the meeting for Council consideration. he current plan design keeps the roadway open between 47th Ave and Klahanie Dr, resulting in an estimated 18-month bridge construction time and a total project construction cost of $6. million. he proposed alternative closes the road between 47th and Klahanie Dr., for an estimated seven (7) month bridge construction and a project construction cost estimate of $.3 million. his decision does not affect total project construction time, which remains 18 to 4 months regardless of road closure adjustments. Please see the attached memo for additional project background and information. FINANCIAL IMPAC: here is a $3.9 million construction cost difference between the two options presented. OR ALRNAIV CONIDRD: Option 1: Keep the road open during bridge construction and proceed to 90% design. Option : Close the road during bridge construction, update the bridge design, and proceed to 90% design. Advantages and drawbacks of both options will be presented at the meeting. RLAD CIY GOAL, POLICI, AND MAR AN: Comprehensive Plan Goal., Greater Options and Mobility ransportation ImprovementPlan, Project R-07

3 Memorandum Date: March, 018 o: From: Re: City Council, Lyman oward, Deputy City Manager teve Leniszewski, Public Works Director Andrew Zagars, City ngineer am Park, enior Project ngineer Issaquah Fall City Road Phase 1 Project Update March 13, 018 Presentation to Council ummary At the March 13, 018 meeting, City and consultant staff will be providing Council with an update on the Issaquah Fall City Road Improvement project. his update will provide Council with a project status including a brief project history, project construction cost estimates, value engineering performed to date, and information about a cost reduction opportunity reconsidering a roadway closure during bridge construction. he City staff is looking to the council to provide guidance on whether to move forward with closure of the roadway, between 47th Pl and Klahanie Drive. Project Details and istory he improvements along Issaquah Fall City Road between Issaquah Pine Lake Road and Issaquah Beaver Lake Road became a priority project for the City with the incorporation of the Klahanie neighborhood. his project has been considered a necessity by King County since the nvironmental Impact tudy was completed in Due to the length and complexity of the project, the overall project was separated into two phases. he first phase begins at the western City limits of the roadway at 40 th Ave and the intersection of Klahanie Blvd. he second phase continues from the intersection of Klahanie Blvd to the intersection of Issaquah Beaver Lake Road. he Issaquah Fall City Road project includes four goals: 1. Improve safety for drivers, cyclists, and pedestrians;. Improve operations at intersections; 3. Increase capacity, and; 4. Protect mature trees and environmentally sensitive areas. On March, 016, the City Council approved the design contract for the first phase of the Issaquah Fall City Road project, between 4 nd Ave and Klahanie Dr. he project

4 included a large public involvement scope that to date has included three public meetings and one detour-planning meeting. his project will widen Issaquah Fall City Road to four lanes, with a new bridge over the North Fork Issaquah Creek, roundabouts at three intersections, a pedestrian crossing to the Pacific Cascade Middle chool, sidewalks, bike lanes, and drainage improvements to meet current standards. he project has been programmed for construction beginning in the summer of 018. his is a two-year construction project and would go through the 019 construction season. Project plans are on track to be completed this summer including permits and right of way. As part of the design, the consultant has been tasked to include detour planning. his began with a community workshop held on October 6, 017, to hear from the public and address their concerns related to detour routes and possible road closures. Up until this point, the information shared with the public had stated the City s intention was to keep Issaquah Fall City Road open to one lane of traffic in each direction, thereby not reducing current travel lanes, throughout the construction of the project. Project Funding his project is currently funded through City funds and an approved tate WDO Connecting Washington Grant of $5 million. he grant is separated into the two phases of the project with $3.5 million for the first phase of construction and the remaining $1.5 million for design and construction of Phase II. he City s efforts to secure other grant opportunities for this project have so far been unsuccessful. taff recommends pursuing a ransportation Improvement Board (IB) grant this summer in the amount of $5 million and extend the project out for a bidding date in January of 019. his timeline would allow staff to complete the design prior to a grant award, increasing the chance of obtaining the requested funds. Additionally, the bidding environment has shown to be more favorable in the winter and early spring months. istory of Design and Construction Cost stimates In November 014, the project was initiated with a conceptual design construction estimate of $16. million. he project estimate was taken from information provided by King County and included a five-lane roadway, two traffic lights, a fish passable culvert at North Fork Issaquah Creek, sidewalks, illumination, and project landscaping. During the initial preliminary designs of the project, a planning level, 15% design estimate of $0.3 million was presented to the City Council on February 7, 017, in order to determine if the design was to proceed with a bridge or culvert crossing. he approved preliminary design included a bridge section, three (3) roundabouts, a four-lane roadway section, bike lanes with buffers, sidewalks, illumination and project landscaping. As the design proceeded, a 30% preliminary design included a revised construction estimate of $3.1 million in June, 017. Additions to the project design that increased the

5 overall estimate included a signalized pedestrian crossing and ramp up to Pacific Cascade Middle chool, changes to the initial stormwater design, and increased design for the bridge and retaining walls. he bridge and wall costs were calculated using preliminary geotechnical soil information. he 60% intermediate design level construction estimate increased again to $7.8 million. his estimate included bridge and wall designs based on soil conditions verified and recommended by the geotechnical engineer, intermediate irrigation, landscaping, traffic control to keep the road open during construction, drainage facilities, storm drainage water quality facilities, and environmental mitigation plans. Contributors to the higher costs included poor existing soil conditions that impact bridge foundations, retaining walls, and road design, and an increase in national and local bid prices due to relative economic prosperity. As a result of increasing estimated project costs, staff required the design team to perform value engineering review to look at all options, including but not limited to roadway closure, to reduce project costs. his review was performed by the design consultant and a regional contractor familiar with bridge and roadway projects. Project savings were found through reducing bridge and roadway widths, modifying the roundabout design, reducing landscaping and irrigation in medians, and reducing the amount of walls. As a result, the project construction estimate has been reduced to $6. million. During the value engineering review, it was determined that construction staging and traffic control made up a significant portion of the construction estimate increases. In order to keep traffic open during the construction of the bridge crossing, a temporary roadway and modifications to bridge design are required. he additional bridge design includes additional pile supports, an extra bridge girder, and temporary shoring walls. It was determined that a roadway closure during the bridge construction would lower the $6. million construction estimate to $.3 million. he $3.9 million reduction is a result of the elimination of the items needed to maintain traffic during construction. In addition to reducing costs, closure of the roadway will decrease the estimated construction time of the bridge. With the road kept open, it will take an estimated eighteen (18) months to construct the bridge. With a roadway closure, the bridge is estimated to be constructed within seven (7) months. Please note, as with all construction projects, the final project cost and schedule will remain undetermined until a contract bid is recieved and a complete schedule is provided. Until that time, project estimates are accompanied by a contingency amount. he latest construction estimate includes a contingency increase of 10%. Direction to Proceed taff is seeking direction from Council whether to pursue the IB grant, resulting in moving the bid announcement to January of 019, and whether to reconsider a closure of the roadway between 47th Pl. and Klahanie Dr. for bridge construction.

6 A V N D R D C Y Duthie ill Park 60 5 LN C C W AY W LV D R W AY WA Y LA K 59 C A V 5 DR 4N D 4ND WA 43 RD Y IA QUA -FA LL C I YR D N D AY 5 7 C 5 5 R I D 6 L P 8 46 R C C 7 Phase 1 5ND 53RD N 54 LA N D DR I G 57 53RD 53RD C 43RD LN 30 R 9 31 Y 3 RD 4 IR P 0 P N D C 38 N R WA Y D R 43 C P O IN C 6 C R 31 LN C ND D LN 9 C 44 LN P O PR I L P ND 7 Y WA WA Phase 45 WAY 4 46 WAY RD ILL 46 P L VD BL C 46 RD C 38 W AY C C AC C ND D R 3 8 C W KLA A N C DR 41 C C 37 W A 3 9 WA Y C 4ND RD I DU DR 5 ND P 3 L Yellow Lake R D 44 V ID P RO R 6 AQ U LA K A-B R RD 35 8 BL A CK NUGG AY 4 R N D BLVD KLAANI 4ND C 33RD D N 6 36 D WAY N 70 C 1 7 C 31 I C Y WA 0 40 V DA L 3 7 P 40 C 41 4 LN 4N D C 3 N Laughing Jacobs Lake 5ND P L 9 LN C 3ND 4 OVID N C N D R 5 3ND Klahanie Park 41 C C 6 6 C 35 AY ND W RD DR B 11 D 3R 6 C R 58 LA K C 8 N B A C PI L A K ND C 4 5 D A Q UA 33 C 38 R 8 B R 6 C I A 33RD Beaver Lake Park 7 9 C 4 L P C 0.5 Miles 6 C 59 R 7 W AY 0.5 Beaver Lake 3RD 39 D K 6 PA R C U N V A DU BO A Pine Lake Park L RD C LA L 63 R D P ND 0 L R 63RD LN C 19 B W 1 0 Pine Lake 18 7 Y R K D Y A W C Issaquah-Fall City Rd - Phase City Limits W A 17 C 69 LN WA 0 Y Issaquah-Fall City Rd - Phase11 Beaver Lake Preserve 7 13 P L 9 WAY teven & Rosina Kipper Preserve 6 6 C 7 4 C 4 8 D O 16 P L Issaquah-Fall City Road Project Vicinity Map R O 5 IN W WAY 3 9 oaring agle Park Plateau Golf & Country Club azel Wolf Wetlands ND C C C 7 LN 7 R 13 W AY 9 10 C 13 C OR DR VD BL 7 14 L P I ND R 1 LN 4N D DR LN 8 Y 40 WA ammamish Commons PRIV W C A RD 5 3R D C 3RD P L C 43RD P L 4 RD BM: IssaquahFallCityRd_Projectxtents.mxd I U AQ

7 Issaquah-Fall City Road Project Update City Council Meeting March 13, 018

8 Meeting Agenda Introductions chedule Cost Implications Factors Driving Cost Actions aken Potential Cost avings Discussion Direction from Council

9 Project Overview Congestion Relief & afety 3

10 Project imeline 4

11 Project imeline 5

12 Preliminary stimates of Probable Construction $ 6 stimates include Construction Activities only Conceptual Design stimate (Nov., 014) Planning Level stimate (Feb., 017) Preliminary Design stimate (June, 017) Intermediate Design stimate $16. Million $0.3 Million $3.1 Million $7.8 Million

13 What Changed Conceptual to Preliminary? 7 1. Changed Intersection ypes to Roundabouts. elected Bridge to Replace Culvert 3. elected Landscaped Medians, Irrigation, and Bike Lane Buffers

14 8 What Changed Preliminary to Intermediate Design? Increased Median Width Adding Walls Changed Drainage Design to Relocate Proposed Pond Geotech Report Poor oils Impacts Bridge Foundations Prosperity Good conomy Increasing Unit Prices (FWA Cost Indices) 7.8% ummer 017

15 What ave We Been Doing to Address scalation? 9 Identified Major Cost Drivers Conducted Mini Value ngineering Workshop in Lochner ngaged Regional Contractor to Review Approach & Identify Potential avings

16 Potential Cost avings 10 Focused on Major Cost Drivers Bridge Design & Construction Methods Reduced Roadway Cross ection Walls Number & ype Intersections Design Modifications

17 Current Plan tay the Course 11 Cost chedule Issues $6. Million 15 to 18 months For Bridge Construction 1. Construction stimate Over Budget. Keeps Roadway Open During Construction 3. Construction stimate includes Potential Cost avings from Redesign 4. ome raffic Will Avoid Construction

18 1 Preliminary stimates of Probable Construction $ stimates include Construction Activities only Conceptual Design stimate (Nov., 014) Planning Level stimate (Feb., 017) Preliminary Design stimate (June, 017) Intermediate Design stimate Current Plan tay the Course $16. Million $0.3 Million $3.1 Million $7.8 Million $6. Million

19 Alternative Close the Road 13 Cost chedule Issues $.3 Million 6 to 7 months closure For bridge construction 1. Reduced Construction Cost. horter Bridge Construction chedule 3. Reduces Number of Impacted rees 4. All raffic Must Detour

20 14 Preliminary stimates of Probable Construction $ stimates include Construction Activities only Conceptual Design stimate (Nov., 014) Planning Level stimate (Feb., 017) Preliminary Design stimate (June, 017) Intermediate Design stimate Current Plan tay the Course Alternative Close the Road $16. Million $0.3 Million $3.1 Million $7.8 Million $6. Million $.3 Million

21 15 Funding ransportation Improvement Board 017 Application $5M Request Missed by One Point hovel Readiness 018 Potential Application Due, August of 018 Award, November of 018 Funds Available, January of 019

22 16 Next teps Looking For Council Direction to: tay the Course with Roadway Design Modifications, or Approval to Close the Roadway for Bridge Construction

23 Discussion 17