BOARD OF SUPERVISORS BUSINESS MEETING ACTION ITEM

Transcription

1 BOARD OF SUPERVISORS BUSINESS MEETING ACTION ITEM Date of Meeting: July 21, 2016 # 4 SUBJECT: ELECTION DISTRICT: Design Endorsement for the Construction of Northstar Boulevard from John Mosby Highway (Route 50) to Tall Cedars Parkway Dulles CRITICAL ACTION DATE: July 21, 2016 STAFF CONTACTS: Mark Hoffman, Transportation and Capital Infrastructure Joe Kroboth, Transportation and Capital Infrastructure PURPOSE: To seek design endorsement from the Board of Supervisors (Board) for the construction of Northstar Boulevard from John Mosby Highway (Route 50) to Tall Cedars Parkway. RECOMMENDATION: Staff recommends the Board endorse the proposed design and direct staff to proceed with the completion of the final design and construction documents for the construction of Northstar Boulevard from John Mosby Highway (Route 50) to Tall Cedars Parkway. BACKGROUND: As part of its On Call Roadway/Transportation Design Services contract, Loudoun County awarded J2 Engineers, Inc. a contract in the amount of $1,111, on August 15, 2015, to perform the design of Northstar Boulevard from Route 50 to Tall Cedars Parkway. The contract s scope of work includes all engineering, surveying, traffic studies, environmental services, public information meetings, and construction estimates necessary to prepare a complete set of design and construction plans for the construction of Northstar Boulevard from Route 50 to Tall Cedars Parkway. The proposed project involves the construction of approximately 3,300 feet of four lane median divided minor arterial roadway, with turn lanes at the following intersecting roads: Route 50, Marrwood Drive, and Tall Cedars Parkway. The project also includes a 10-foot wide shared use path on either side (Attachment 1). Traffic signals with pedestrian controls will be installed at the Route 50 and Tall Cedars Parkway intersections as part of this project. This portion of roadway is a segment of the proposed VA-659 Relocated Northstar Boulevard from Croson Lane to Braddock Road as outlined in the 2010 Revised Countywide Transportation Plan. The construction of this segment of roadway will help to improve traffic flow in the area, relieve traffic

2 Item 4, Design Endorsement for the Construction of Northstar Boulevard from Route 50 to Tall Cedars Parkway Board of Supervisors Business Meeting July 21, 2016 Page 2 volume/congestion on surrounding roadways and intersections and ultimately provide a North/South corridor for Loudoun County residents. The 60 percent roadway widening plans were submitted to the Virginia Department of Transportation (VDOT) on June 24, Preliminary feedback shows that VDOT representatives are supportive of the present design. A public information meeting regarding the widening plan was held on December 15, 2015 at the Arcola Elementary School. The purpose of this meeting was to present the alignment, answer questions, solicit public input, and determine support for the project. Response from the attendees and those who submitted written comment was largely favorable. Copies of the public comments are contained in Attachment 2 entitled Route 659 Northstar Boulevard Extension. ISSUES: Environmental Impacts: One of the more significant environmental issues related to this project is the fact that it will cross the South Fork of Broad Run. This crossing will impact the 100 Year Federal Emergency Management Agency Floodplain. Also, there will be impacts to wetlands in the area of the stream crossing. Currently, the existing plans call for the use of two single span bridge structures (one per each direction). As currently designed, this system will allow the roadway to cross the floodplain with no expected rise in the 100 year flood elevation. Additionally, this type of design will help to minimize impacts and disturbances in the area of the stream crossing. Right-of-Way Impacts: There are approximately 11 properties that will be affected by the construction of this segment of Northstar Boulevard. A portion of the right=of-way needed for this roadway has been reserved along the south end of the proposed project. As it is currently designed, the alignment generally falls within the right-of-way that was reserved as a result of the adjacent residential developments at the South end. However, additional right-of-way will be required due to the fact that the width of the existing dedication/reservation does not meet the needed width of the proposed road section as well as the need for turn lanes. Also, temporary construction easements as well as permanent utility and storm drain easements will be required. Please note that, while no reservation/dedication exists for the northern end of the proposed alignment, County staff is currently working with a developer to try and obtain a portion of needed right of way for the project. Utility Impacts: There are various utilities present along the Northstar Boulevard Road Corridor, including a 24 water main, power and communication lines that will need to be relocated as part of this project. The proposed alignment has been developed so as to minimize impacts to utilities to the extent practical, and minimize utility relocation costs. Value Engineering Analysis Required: Due to the fact that this project has Revenue Sharing Funds and has a cost of more than $5 million, VDOT requires a Value Engineering (VE) Study (Attachment 3). This study was performed as part of VDOT s Locally Administered Projects (LAP) process on May 10, and May 11, The recommendation that was put forth by the study was to build this segment of roadway in the interim condition by constructing the inside

3 Item 4, Design Endorsement for the Construction of Northstar Boulevard from Route 50 to Tall Cedars Parkway Board of Supervisors Business Meeting July 21, 2016 Page 3 lanes first and utilize an open ditch section. The VE study concluded that this change to the design would potentially save approximately $407,000 (0.12% of the overall project cost). Staff is recommending against this component of the VE study for several reasons. First and foremost, constructing the roadway in this manner utilizing a ditch section would be in violation of the Countywide Transportation Plan (CTP), which specifies an urban section for this roadway in both the interim and ultimate conditions. This would not only require a significant redesign of the existing plans, but would require a Comprehensive Plan Amendment to the CTP; an extensive and time consuming process that requires a public hearing as well as action by the Planning Commission and Board of Supervisors. Also, the County s Consultant, J2 Engineers (J2), analyzed the open section concept and determined that an open section roadway that would meet VDOT criteria cannot be constructed within the footprint of the ultimate curbed section. Thus, additional right-of-way and easements would be required to construct the section as proposed by the VE study. Furthermore, additional stormdrain improvements would be required for the open ditch section in order to remove runoff from the ditches and direct it away from the road. In their analysis, J2 concluded that utilizing an open section roadway would actually increase the cost of the project by $262,500, exclusive of the cost of the additional needed right of way and easements. A summary of this analysis is presented in Attachment 4. Additionally, if the roadway was widened to the outside in the future, traffic would be required to cross the work zone as it enters and leaves the roadway, potentially causing an unsafe situation as well as requiring the need for increased maintenance of traffic on what would be a very busy roadway. Also, widening the roadway to the outside in the future could potentially negatively impact the adjacent neighborhoods and would likely cause a shutdown or diversion of pedestrian traffic. As it is currently designed, with a curbed section, the plans for the construction of this segment of Northstar Boulevard are in keeping with the CTP and the design acts to minimize the need for additional easements and right-of-way to the extent possible. As a result, staff recommends that the Board endorse the alignment as currently designed and reject the proposed design change recommended in the Value Engineering Study. FISCAL IMPACTS: Current appropriations for this project through FY 2017 in the Adopted CIP total $5.432 million. These funds are a combination of State Revenue Sharing, Northern Virginia Transportation Authority (NVTA) 30 percent Local funds, and cash proffers. An additional $ million dollars consisting of Revenue Share funds, NVTA 30 percent Local and 70 percent Regional funds, and proffer monies is slated through FY 2019, for a total project budget of $ million. The budget is intended to cover all design, right-of-way acquisitions, utility relocation, and construction costs. Currently, the design has a total estimated cost of $35.1 million, based on the Consultant s estimate.

4 Item 4, Design Endorsement for the Construction of Northstar Boulevard from Route 50 to Tall Cedars Parkway Board of Supervisors Business Meeting July 21, 2016 Page 4 ALTERNATIVES: 1. The Board may reject the recommendation of the VDOT Value Engineering Study, endorse the current design and direct Staff to complete the design and construction documents; or 2. The Board may accept the recommendations of the VDOT Value Engineering Study and direct staff to change the design consistent with the recommendations of the study and initiate an amendment to the CTP; or 3. The Board may choose to not endorse the design and direct Staff to revise and/or modify the proposed alignment. DRAFT MOTIONS: 1. I move the Board of Supervisors reject the recommendations from the Virginia Department of Transportation s Value Engineering Study and endorse the design for the construction of Northstar Boulevard from Route 50 to Tall Cedars Parkway as presented in the July 21, 2016 Action Item (Attachment 1). OR I further move the Board of Supervisors direct staff to proceed with the completion of the final design and construction documents. 2. I move an alternate motion. ATTACHMENTS: 1. Aerial Photo with Proposed Design Superimposed 2. Route 659 Northstar Boulevard Extension 3. Value Engineering Study Report: Northstar Boulevard Loudoun County 4. Memorandum to Loudoun County Department of Transportation and Capital Infrastructure Regarding Northstar Boulevard VDOT Value Engineering Assessment

5 NORTHSTAR BOULEVARD (FROM TALL CEDARS PARKWAY- ROUTE 2200 TO JOHN MOSBY HIGHWAY - ROUTE 50) DULLES ELECTION DISTRICT

6 Route 659 Northstar Boulevard Extension Route 50 (John Mosby Highway) to Route 2200 (Tall Cedars Parkway) Project No R31, PE-101 UPC# January 2016 Prepared for Prepared by Department of Transportation and Capital Infrastructure Loudoun County Virginia J2 Engineers, Inc. 602 South King Street, Suite 100 Leesburg, Virginia ATTACHMENT 2

7 Route 659 Northstar Boulevard Extension January 2016 TABLE OF CONTENTS 1. Introduction 3 2. Project Narrative and Background 3 3. Purpose and Need Statement 3 4. Design Public Information Meeting Summary 4 APPENDICES A. Public Meeting Notice 5 B. Design Public Information Meeting Exhibits 10 C. Design Public Information Meeting Brochure 15 D. Design Engineer s Summary of December 15, 2015 Public Information Meeting 20 E. Written Comment Forms 25 F. Public Information Meeting Sign-in Sheets 34 2

8 Route 659 Northstar Boulevard Extension January Introduction Under contract to the Loudoun County, J2 Engineers, Inc. (J2) prepared the preliminary design for the proposed roadway extension of Northstar Boulevard (Route 659) from the intersection of Tall Cedars Parkway (Route 2200) north approximately 3,300 linear feet to John Mosby Highway (Route 50). The improvements consist of two (2) northbound and two (2) southbound lanes that will have associated turn lanes at the intersections of Tall Cedars Parkway, Marrwood Drive, and John Mosby Highway. A forty (40) foot wide depressed grass median, and two (2) ten (10) foot wide shared paths along each side of the proposed roadway. The scope of design services includes the development of preliminary design of storm water management facilities, storm drainage appurtenances and utility relocation. This document summarizes the Design Public Information Meeting process undertaken for this project, which consisted of the following activities: J2 authorized to proceed August 2015 Notice of Project Initiation mailed to property owners August 2015 Public Information Meeting Notice advertised in newspapers Nov & Dec 2015 Public Notice mailed to property owners November 2015 Public Information Meeting conducted December 15, 2015 Public Information Meeting comment period closed December 30, 2015 Public Information Meeting Report Summary January Project Narrative and Background The Countywide Transportation Plan (CTP) adopted in June 2010, identifies Northstar Boulevard is a major collector roadway from VA Route 659 (Belmont Ridge Road) south to VA Route 610 (Braddock Road). The proposed project is the segment from VA Route 2200 (Tall Cedars Parkway) to US Route 50 (John Mosby Highway). The roadway will ultimately become an urban arterial with a controlled access; median divided; with a proposed grade-separated interchange at US Route 50. This phase is defined as the interim condition with at grade intersections at Tall Cedars Parkway and Route 50. The roadway will also provide alternative access to residential developments within the Dulles South area. 3. Purpose and Need Statement The purpose of Northstar Boulevard is to complete another section of Route 659 extended providing an alternative northsouth connection to Route 50 to those currently used today. The project will improve capacity and safety of existing roadway networks within the Dulles South area. The project includes substantial turn lane and acceleration lane improvements on Route 50. Present needs associated with improving Route 659 within the study corridor include: Improving capacity and reduce congestion on local roadway networks. Constructing a safe traffic corridor through the use of designing proper roadway geometry and operations. Provide a critical segment of Northstar Boulevard to connect to Route 50 3

9 Route 659 Northstar Boulevard Extension January Public Information Meeting Summary The Design Public Information Meeting was held on Tuesday December 15, 2015 at Arcola Elementary School in Arcola, Virginia. The meeting was held from 6:30 pm to 8:30 pm with representatives from Loudoun County and the consultants available to respond to public comment. A total of 34 citizens signed in at the meeting. Most in attendance recognized the need to improve the roadway and supported the project, but were concerned with pedestrian crosswalk safety, traffic noise, and additional traffic. There were suggestions to evaluate a pedestrian underpass. A total of 8 written comments were submitted to Loudoun County during the Public Information Meeting and the subsequent public comment period. Several individuals commented using a form letter that identified suggestions to specific design elements of the project. Those comments/suggestions are summarized in Appendix D. Of the 8 total written comments received, 6 supported the project. Those comment not favoring the project expressed concerns of other traffic issues with the surrounding roadways that needed attention before the construction of Route 659. Those comments are also addressed in the Engineers Summary Appendix D. 4

10 Route 659 Northstar Boulevard Extension January 2016 APPENDIX A Public Meeting Notice 5

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15 Route 659 Northstar Boulevard Extension January 2016 APPENDIX B Design Public Information Meeting Exhibits 10

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19 Route 659 Northstar Boulevard Extension January 2016 AM Actuated Coordinated PM Actuated Coordinated 170 Route 50 & Northstar EB NB WB SB Cycle Length (Sec) L R L R L R L R AM Peak Vol Avg Veh/Cycle Q (ft) PM Peak Vol Avg Veh/Cycle Q (ft) Max Q (ft) Rounded Max Q (ft) AM Actuated Un Coordinated 170 PM Actuated Un Coordinated 170 Tall Cedars & Northstar NB WB SB Cycle Length (Sec) L R L R L R AM Peak Vol Avg Veh/Cycle Q (ft) PM Peak Vol Avg Veh/Cycle Q (ft) Max Q (ft) Rounded Max Q (ft)

20 Route 659 Northstar Boulevard Extension January 2016 APPENDIX C Design Public Information Meeting Brochure 15

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25 Route 659 Northstar Boulevard Extension January 2016 APPENDIX D Engineer s Summary of December 15, 2015 Public Information Meeting 20

26 Questions: Route 659 Northstar Boulevard Extension Design Public Information Meeting Tuesday December 15, 2015 Do you support this project? What are the major concerns that you would like to see considered in the design of this project? (Responses summarized in the Comments/Ideas/Suggestions column) Please provide us with any additional information which you feel would improve the project. (Responses summarized in the Comments/Ideas/Suggestions column) How did you hear about the meeting? No. Name/Address Questions Comments/Ideas/Suggestions Response and 3 1 Clarence Hoop Rutile Lane Stone Ridge, VA Hoopc@verizon.net 2 John Weigand High Plateau Ct. Weigajoh@comcast.net Yes Add underground tunnel for crosswalk Loudoun County has directed the consultant to provide an evaluation of a pedestrian underpass. Yes Stoneridge HOA The intersection of highway 50 and 15 make good use of a traffic circle (roundabout) in lieu of a traffic light. Recommend this at least at tall cedars parkway and Marrwood drive. The parkway passes so near schools and residences that pedestrian crossing the parkway will have a difficult time. Brambleton has implemented pedestrian tunnels under Northstar parkway and Belmont ridge road. Doing this at construction would be easier and benefits pedestrians. A signal is not currently warranted at the intersection of Northstar Boulevard and Marrwood Drive. The high traffic volumes would not support a roundabout at Northstar Boulevard and Marrwood Drive. The addition of a roundabout would require substantial geometric modifications which would reduce the capacity of Northstar Boulevard. Loudoun County has directed the consultant to provide an evaluation of a pedestrian underpass. 21

27 Questions: Route 659 Northstar Boulevard Extension Design Public Information Meeting Tuesday December 15, 2015 Do you support this project? What are the major concerns that you would like to see considered in the design of this project? (Responses summarized in the Comments/Ideas/Suggestions column) Please provide us with any additional information which you feel would improve the project. (Responses summarized in the Comments/Ideas/Suggestions column) How did you hear about the meeting? No. Name/Address Questions Comments/Ideas/Suggestions Response and 3 3 Candice Long Marrwood Homeowner Cwlong22@gmail.com Yes The project will propose fencing and buffering along Northstar Boulevard on school property. Lots of Trees (expect evergreens) between the school and Northstar. Please add a fence. I would prefer seeing a berm in addition to landscaping. Also, underground tunnels for pedestrian traffic would be ideal. Since this will not happen until 2020 is there any way a temporary bike path could be installed to allow homeowners west of the proposed Northstar access to the east part of proposed Northstar. Could this be used on Tall cedars extension? Berming would be difficult with the proposed roadway being substantial lower than the playground without impacting the existing school facilities, but will be investigated as the plans proceed forward. Loudoun County has directed the consultant to provide an evaluation of a pedestrian underpass. There is currently no funding to construct a temporary bike path to allow homeowners west of the proposed Northstar access to the east part of proposed Northstar Boulevard. The project proposes to connect the pedestrian facilities along Marrwood to the trails along Northstar Boulevard. 22

28 Questions: Route 659 Northstar Boulevard Extension Design Public Information Meeting Tuesday December 15, 2015 Do you support this project? What are the major concerns that you would like to see considered in the design of this project? (Responses summarized in the Comments/Ideas/Suggestions column) Please provide us with any additional information which you feel would improve the project. (Responses summarized in the Comments/Ideas/Suggestions column) How did you hear about the meeting? No. Name/Address Questions Comments/Ideas/Suggestions Response and 3 4 William Deal VP Stone Ridge HOA Mineral Springs Circle Stone Ridge, VA wdeal20105@gmail.com Yes Matt Letourneau Significant berm and buffering between road and school playground 25 or 30 mph max speed on Northstar during school hours significant speed monitoring along Northstar between 3 schools safety of vehicles getting onto Northstar from Schools traffic and pollution exposure to children Safety in school zone (3 schools) How to manage the ~150 to 200 cars that leave Arcola ES each weekday morning between 7:30 am and 8:00 am 50 mph road with pedestrian cross walks? The county must do CO2 studies due to the close proximity to the school and play ground The project will propose fencing and buffering along Northstar Boulevard on school property. Berming would be difficult with the proposed roadway being substantial lower than the playground without impacting the existing school facilities, but will be investigated as the plans proceed forward. School zones will be evaluated through the design process Speed monitoring suggestion is noted, but is not a requirement of this project If access to Northstar Boulevard from the school is proposed; the access will need to be evaluated for safety and approved by VDOT. Buffering and fencing around the school property should restrict students exposure to traffic along Northstar Boulevard. LCPS is aware of the traffic issues that exist at Arcola Elementary. Pedestrian Crossings are being evaluated with the design. If warranted, crossings would only occur at signalized intersections. CO2 studies are not required for this project. 23

29 Questions: Route 659 Northstar Boulevard Extension Design Public Information Meeting Tuesday December 15, 2015 Do you support this project? What are the major concerns that you would like to see considered in the design of this project? (Responses summarized in the Comments/Ideas/Suggestions column) Please provide us with any additional information which you feel would improve the project. (Responses summarized in the Comments/Ideas/Suggestions column) How did you hear about the meeting? No. Name/Address Questions Comments/Ideas/Suggestions Response and 3 5 Sarah Tegen & Bill Cook Yes Facebook group Noise abatement in Marrwood Noise abatement is not required for this project Dillinger Mill PL Sarah.tegen@gmail.com Pedestrian Safety Safety barriers on school properties The project will propose fencing and buffering along Northstar Boulevard on school property. Possible for Pedestrian overpass at Tall Cedars and proposed Northstar Loudoun County has directed the consultant to provide an evaluation of a pedestrian underpass. Pedestrian overpass will not be evaluated at this location. Pedestrian Crossings are being evaluated with the design. If warranted, crossings would only occur at signalized intersections. 6 NO Noted 7 Mary Virginia Polonsky mvpolonsky@aol.com 8 Westridge Homeowner across from John Champe H.S. Yes. I am in favor of the Northstar Blvd to be built. Traveling to Brambleton from South Riding at certain days needs much improvement and I NO VP of HOA, otherwise we saw no information about the meeting We really need a traffic light at Mattingly and John Champe exit as it is a very dangerous intersection during school hours. It will get more dangerous if Northstar is completed to Rt. 50. I don t see any rush to provide this short distance of Northstar until it can continue on beyond Rt. 50 toward Arcola. It will just cause traffic to bog down on Northstar where it is only two lanes. Noted A traffic signal at Mattingly and John Champe is outside this projects scope and would require meeting VDOT warrants to install a signal at that location. Noted This improvement will improve traffic flow on surrounding roadway networks without continuing beyond Route 50 to Arcola. 24

30 Route 659 Northstar Boulevard Extension January 2016 APPENDIX E Written Comment Forms 25

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39 Route 659 Northstar Boulevard Extension January 2016 APPENDIX F Design Public Information Meeting Sign-in Sheets 34

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45 Value Engineering Study Report VDOT Northstar Boulevard Loudoun Co R31,P101, R201, C501 UPC# Study Date: 5/10/16 5/11/16 ATTACHMENT 3

46 A Value Engineering Study of the subject project was conducted on 5/10/2016 and 5/11/2016. Members of the VE team were: Abdul Hammadi Location and Design NOVA District Amir Salahshoor Local Assistance NOVA District Arun Raj Traffic Engineering NOVA District Bryan Campbell Environmental NOVA District Greg Barnes Project Manager Loudoun County John Leddy Right of Way NOVA District Jon Wilfong Project Engineer J2 Engineers Kyanna Jennings Materials NOVA District Kyle Kennedy Value Engineering Central Office Larry Hedgepeth Structure and Bridge Central Office Pawan Sarang Hydraulics NOVA District Ron Garrett Value Engineering Central Office Scott Burdick Construction NOVA District Susie Lue Local Assistance NOVA District Vicente Valeza Structure and Bridge NOVA District This Locally Administered Project will connect the existing Northstar Boulevard at Tall Cedars Parkway to Route 50. The Loudoun County Countywide Transportation Plan (CTP) has designated Northstar Boulevard as a minor arterial which will eventually connect from Route 7 in the north (via existing Belmont Ridge Road) to Braddock Road and south into Prince William County. This phase of the CTP will open up a new connection to the Stone Manor Subdivision and complete the connection of Northstar Boulevard from Braddock Road to Route 50. Creating additional north-south routes through Loudoun County is a priority of the county government and Northstar Boulevard helps to meet this need. Future phases of the CTP plan for Northstar to be widened to six lanes and the intersection of Northstar Boulevard and Route 50 to be rebuilt as a grade separated interchange. The roadway construction will be built on entirely new alignment through mostly wooded property. Much of the right of way to be used has been reserved for VDOT use by developers through proffers and has not been built on. The roadway will cross the South Fork of Broad Run which will require a 150 bridge. Much of the area around the project has been developed or is being developed into residential subdivisions. Arcola Elementary School is directly adjacent to the project at the intersection with Tall Cedars Parkway. The proposed typical section for this project includes two 12-foot lanes traveling in each direction with curb and gutter and enclosed storm sewer, ten-foot wide shared use path on

47 R31 UPC No both sides of the road and a 40-foot wide graded median. The future widening is planning to add lanes to the inside and reduce the width of the median. The basic functions of this project were identified by the study team as Connect Network" and Ease Congestion and a secondary function to Enhance Development. Major components for this project are Pavement, Right of Way, Bridge, Excavation, Stormwater Management, Utilities, Maintenance of Traffic and Traffic Signals. One recommendation was developed during the study to be submitted for review/approval by the identified Decision-Makers and Chief Engineer.

48 R31 UPC No End of Project Beginning of Project Project Location Map Northstar Blvd Loudoun County

49 R31 UPC No Recommendation 1 Build the Inside Lanes Now and Shift the Future Widening to the Outside Lanes The current design contains a four lane typical cross section with curb and gutter, enclosed storm sewer and a wide graded median. The median is designed to accommodate a future widening to six lanes by building into the median. Similarly, the storm sewer system is designed to meet the capacity requirements the ultimate condition of six lanes. While this project is anticipating the future widening, there is currently no timeline on when the extra lanes would be built, and future funding priorities will determine if the widening occurs. The proposed value engineering change would build a standard width median with the four inside lanes of the ultimate six lane configuration. Instead of curb and gutter with storm sewer, this configuration would include shoulders and ditches. The shared use paths would be constructed in the same location as the current design and the bridge would be constructed to meet the ultimate six lane typical section. Constructing the inner lanes first would be an overall cost savings to this project and reduce the construction duration. This change could eliminate nearly all of the curb and gutter, and most of the storm sewer system, while only adding paved shoulder to the outer edge of the roadway. Constructing the road in this sequence will allow future construction to occur to the outside of traffic, which is a safer and more efficient means of construction. Additionally, the extra space between the roadway and the shared use path provides more space for storage of plowed snow. Potential savings/cost avoidance: $407,000

50 R31 UPC No Current Design Typical Cross Section VE Suggested Cross Section

51 R31 UPC No Current Design Proposed Design Quantity Unit Cost Total Quantity Unit Cost Total Savings Northstar Blvd Asphalt SM-9.5A (ton) $8.84 $230, $8.84 $275,767 -$45,544 Asphalt IM-19.0A (ton) $17.07 $444, $17.07 $532,806 -$87,996 Asphalt BM-25.0 (ton) $32.94 $858, $32.94 $1,028,156 -$169,806 Cement Treated Aggr $16.77 $436, $16.77 $523,442 -$86,449 Aggr. Base 21B (ton) $21.00 $588, $21.00 $696,948 -$108,255 Phosporus Nutrient Credit 5 $38,000 $190,000 6 $38,000 $228,000 -$38,000 CG-7 (LF) $29.86 $358, $29.86 $43,297 $314,754 15" Pipe (LF) 4239 $54.41 $230, $54.41 $40,536 $190,112 18" Pipe (LF) 1440 $57.92 $83, $57.92 $44,022 $39,388 21" Pipe (LF) 57 $57.50 $3,278 0 $0.00 $0 $3,278 24" Pipe (LF) 614 $79.50 $48, $79.50 $15,901 $32,914 30" Pipe (LF) 847 $ $90,405 0 $0.00 $0 $90,405 36" Pipe (LF) 51 $ $6,120 0 $0.00 $0 $6,120 ES-1 15" (EA) 4 $ $1,940 7 $ $3,395 -$1,455 ES-1 18" (EA) 2 $ $1,130 0 $ $0 $1,130 ES-1 30" (EA) 1 $1, $1,195 1 $1, $1,195 $0 ES-1 36" (EA) 1 $1, $1,765 0 $1, $0 $1,765 EW-1 30" (EA) 1 $2, $2,133 0 $2, $0 $2,133 DI-1 (EA) 1 $3, $3,697 0 $0.00 $0 $3,697 DI-2 L=10' (EA) 2 $6, $13,822 0 $0.00 $0 $13,822 DI-3A (EA) 6 $4, $24,528 1 $4, $4,088 $20,440 DI-3B L=4' (EA) 11 $4, $47,069 0 $0.00 $0 $47,069 DI-3B L=6' (EA) 15 $4, $68,595 4 $4, $18,292 $50,303 DI-3B L=8' (EA) 14 $4, $68,446 1 $4, $4,889 $63,557 DI-3B L=10' (EA) 3 $5, $15,156 0 $0.00 $0 $15,156 DI-3BB L=4' (EA) 2 $4, $8,552 0 $0.00 $0 $8,552 DI-3BB L=6' (EA) 3 $4, $14,544 0 $0.00 $0 $14,544 DI-3BB L=8' (EA) 2 $5, $10,858 0 $0.00 $0 $10,858 DI-3C L=6' (EA) 2 $4, $8,026 0 $0.00 $0 $8,026 DI4AA L=4' (EA) 1 $6, $6,817 0 $0.00 $0 $6,817 Total Savings $407,335

52 R31 UPC No Comments 1. Flatten Fill Slopes and Install a Berm: The study team suggests using surplus excavated soil to flatten fill slopes where possible as well as to construct a stabilized earthen berm between Arcola Elementary School recreational fields and the proposed roadway. Although there will be some added earthwork cost, these actions can save the overall project money by reducing the need to haul and dispose of excess or unsuitable material from the project site. Additional cost savings could come from the use of unsuitable roadway fill material onsite rather than disposing it and the reduction of guardrail from steep slopes adjacent to the road. Earthen berms along the recreational fields could act as a visual screen and noise dampener. A potential draw back to using both flatter slopes and the earthen berm could be the need to acquire additional right-of-way to accommodate the expanded disturbed area. 2.Temporary Lane Shift/Maintain Two Lanes (each direction) of Rte 50: With the Extension of Northstar Blvd from Route 50 to Tall Cedars Parkway, maintenance of traffic (MOT) at the proposed intersection of Northstar Blvd and Rte 50 will be a significant concern and keeping two open lanes in each direction on Rte 50 is highly suggested. At the time of the Value Engineering Study there was no MOT plan available. As the plan is developed, it is suggested the engineer use temporary lane shifts and temporary pavement on Rte 50 to avoid lane closures, reduce the impact on traffic, and to improve safety in Work Zone area. 3. Use of Alternative BMPs and Purchasing of Nutrient Credits: The designer should investigate the use of alternative best management practices (BMPs) such as grass swales, bioretention basin, underground BMP etc. to be installed in lieu of the current stormwater management wet pond. The footprint of any alternative BMPs (or the current SWM wet pond) can be reduced if water quality nutrient credits are purchased (refer to VDOT IIM-L&D-251.2). If any proposed BMP/s are to be maintained by VDOT, then purchasing of nutrient credit first is the preferred method and should be performed before sizing of any BMP/s.

53 R31 UPC No Section 1 Study Information Project Description Authorizing Persons

54 R31 UPC No Study Identification Project No R31,P101, R201, Study Date: 5/10/2016-5/11/2016 C501 Project location: Loudoun County Field Inspection Date: 5/10/2016 From: Route 50 To: Tall Cedars Pkwy Project Description Length: Total Project Cost: Type of Funds: 0.61 mi $12,000,000 Major Project Components: Functional Class: Pavement, Right of Way, Bridge, Excavation, Stormwater Minor Arterial Management, Utilities, Maintenance of Traffic and Traffic Signals Design Speed: Projected Traffic Design Year Ad. Date 60 ADT: /1/2019 DHV: Project Manager Name Location Phone Susie Lue NOVA District (703) Authorizing Persons Name Location Position Joe Kroboth Loudoun County Transportation Director Helen Cuervo NOVA District District Administrator Bart Thrasher Central Office Location & Design State L&D Engineer

55 R31 UPC No Section 2 Recommendations Summary of Potential Savings/Cost Avoidance Function Analysis Creative Idea Listing Team Rating of Creative Ideas

56 R31 UPC No SUMMARY OF RECOMMENDATIONS # Description Initial Lifecycle Total 01 Build the Inside Lanes Now and Shift the Future Widening to the Outside Lanes $407,000 $407,000

57 Function Connect Network Ease Congestion Enhance Development Basic /Secondary B B S Creative Listing Savings Environmental Operational Construction Acceptance Total Enforce Proffers Build the Inside Lanes First Flatten Fill Slopes Berm In front of Elementary School Reconfigure Basin to Avoid Water Line Use Alternative BMPs/Purchase 0 Credits MOT Rte 50 Use Temp Lane Shift Maintain 2 Lanes 0

58 J2 Engineers, Inc. Civil Engineers Land Development Planning Transportation Surveyors Memorandum To: Attn: From: Loudoun County Department of Transportation and Capital Infrastructure Greg Barnes, P.E. James Bishoff, P.E. Date: 6/23/2016 Re: Northstar Boulevard VDOT Value Engineering Assessment R31, P101, R201, C501 This memorandum is to provide Loudoun County DTCI with an evaluation and conclusion of the VDOT Value Engineering Study Report on the above referenced project in May Background: VDOT Defines Value Engineering (VE) as a systematic, creative study process conducted by engineers and technicians to obtain optimum value for every dollar spent. The Code of Virginia requires VDOT to employ value engineering in conjunction with any project on any highway system, regardless of contract delivery system, using criteria established by the Department and including but not limited to all projects costing more than $5 million. The VE process consists of seven steps and is summarized below. Selection Identification of projects for VE studies, and selects specific projects to achieve: Maximum value Quality improvements (Environmental, operational performance and constructability) Energy savings and Other benefits, such as a shorter construction schedule An important part of this phase is the selection of VE team. Investigation Acquisition of knowledge of design to be studied, determine its basic functions, and assess its major functions, cost and relative worth. Speculation Brainstorm functions of design elements isolated by the investigation and develop alternatives for each. Evaluation Analysis of speculation results and selection of ideas for further study. Development Collection of additional data to analyze the best alternatives selected during the evaluation and preparation of cost estimates and initial designs that ensure acceptability and ultimate project implementation. Presentation Presentation of recommended alternatives to decision makers for their consideration and potential approval Lafayette Center Dr, Suite 330, Chantilly, Virginia Phone: Fax: ATTACHMENT 4

59 Northstar Boulevard Phase 2 VE Assessment June 21, 2016 Page 2 Implementation Ensure approved recommendations are rapidly and properly translated into action to achieve savings of proposed project improvements. Project Description: Northstar Boulevard is designated as an Urban Minor Arterial Road with an interim design speed of 50 mph. The horizontal and vertical design elements meet or exceed the ultimate design requirement of 60 mph. The roadway section is a U4M for the interim and U6M in the ultimate condition. The section consists of two -12 lanes with curb and gutter along the outer lanes, closed drainage system and shared use paths on both sides of the road. The section proposes a 40 depressed median for the interim condition and will be converted to an 18 median as the ultimate improvements are implemented. The project is approximately 0.61 mile in length and is located between Tall Cedars Parkway and Route 50. This section of roadway is a new alignment and utilizes right of way reservations for over half the alignment. The project will require right of way acquisition from at least four parcels that did not make reservations for the roadway improvements. Recommendation 1: Build the inside lanes now and shift the future widening to the outside lanes. We understand that VDOT policy has directed design engineers to design interim roadways from the outside. This reduces disruption to vehicular and pedestrian facilities; restrict works zones to within the median and eliminate/reduces potential offsite impacts. Below is the Proposed Typical Section proposed with the current design. It shows two -12 lanes with CG-7 to the outside and a 40 depressed median with 8 shoulders (4 paved). The proposed median ditch side slopes are 6:1 in tangent and varies when in superelevation. The section is consistent with typical sections currently being used by Loudoun County and VDOT on many projects located in the Northern Virginia District. This section is consistent with the County Transportation Plan. Proposed Typical Section The VE Suggested Typical Section provided with the report was graphically incorrect and did not provide dimensions for evaluation. This assessment took some liberties to develop the typical section based on dimensions and slopes provided. Below is what was prepared and used for this assessment. Redline markups of the VE Typical Section can be found in the Supporting Documents section of this memorandum. VE Suggested Typical Section 602 South King Street, Leesburg, Virginia Phone: Fax:

60 Northstar Boulevard Phase 2 VE Assessment June 21, 2016 Page 3 Deficiencies: VE Typical Section not in compliance with County Transportation Plan. This would require the Comprehensive Plan to be revised. VE Typical Section was not prepared to scale to show the proposed width of a 16 constructing from the inside out. Utilizing the information prepared by for the VE report, the typical section will create a 4 depressed median with a ditch depth of 8. This is not adequate to convey runoff from a 10-yr storm. Refer to the section right. VE Typical Section was not prepared to scale and does not accurately depict the shoulder and ditch section on the outside of the roadway. Utilizing the information prepared by for the VE report, the typical section will create a 9 depressed roadside ditch with a depth of 19. This is not adequate to convey runoff from a 10-yr storm, while maintaining freebroad from the edge of travelway. Refer to the section right. This section still requires median inlets and a closed drainage system not evaluated in the VE report. The closed system required to convey runoff from the roadside ditch will need to be offset from the ditch centerline to accommodate the future widening without reconstruction of the entire storm drainage system. The proposed shallow ditches in the median and roadside will not work when the roadway rolls into superelevation. This improvement was also evaluated assuming CG-3 was installed along the median. This concept modification requires additional inlets when the roadway is in superelevation to collect runoff along the low side of the median. Constructing the inner lanes first would generate additional costs to the project and increase life-cycle costs for maintenance of the shoulder and roadside ditches. The depressed median will not work as proposed, so this assessment evaluated the section with curbing along the median. With the introduction of curbing, the project will require drainage inlets on the high side of the median to reduce spread along the travelway. The following page has supporting documentation for the estimated cost increase. Potential Cost Increase of $262, South King Street, Leesburg, Virginia Phone: Fax:

61 Northstar Boulevard Phase 2 VE Assessment June 21, 2016 Page R31 UPC No Current Design Proposed Design Quantity Unit Cost Total Quantity Unit Cost Total Savings Northstar Blvd Asphalt SM 9.5A (ton) $ 8.84 $ 230, $ 8.84 $275,923 $45,570 Asphaslt IM 19.0A (ton) $ $ 444, $ $532,806 $87,996 Asphalt BM 25.0 (ton) $ $ 858, $ $1,028,156 $169,806 Cement Treated Aggr $ $ 436, $ $523,442 $86,449 Aggr. Base 21B (ton) $ $ 588, $ $696,948 $108,255 Phosphorus Nurtirent Credit 5 $ 38,000 $ 190,000 6 $ 38,000 $228,000 $38,000 Engineering Redesign 0 $ $ 1 $ 175,000 $175,000 $175,000 CG 7 (LF) $ $ 358, $ $43,297 $314,754 CG 3 (LF) 0 $ $ 6740 $ $205,031 $205,031 Ditch Lining (SY) 0 $ $ 2150 $ $80,625 $80,625 15" Pipe (LF) 4239 $ $ 230, $ $40,535 $190,109 18" Pipe (LF) 1440 $ $ 83, $ $44,019 $39,386 21" Pipe (LF) 57 $ $ 3,278 0 $ $0 $3,278 24" Pipe (LF) 614 $ $ 48, $ $15,900 $32,913 30" Pipe (LF) 847 $ $ 90,409 0 $ $0 $90,409 36" Pipe (LF) 51 $ $ 6,120 0 $ $0 $6,120 ES 1 15" (EA) 4 $ $ 1,940 7 $ $3,395 $1,455 ES 1 18" (EA) 2 $ $ 1,312 0 $ $0 $1,312 ES 1 30" (EA) 1 $ 1, $ 1,195 1 $ 1, $1,195 $0 ES 1 36" (EA) 1 $ 1, $ 1,765 0 $ 1, $0 $1,765 EW 1 30" (EA) 1 $ 2, $ 2,133 0 $ 2, $0 $2,133 DI 1 (EA) 1 $ 3, $ 3,697 0 $ 3, $0 $3,697 DI 2 L=10' (EA) 2 $ 6, $ 13,822 0 $ 6, $0 $13,822 DI 3A (EA) 6 $ 4, $ 24,528 1 $ 4, $4,088 $20,440 DI 3B L=4' (EA) 11 $ 4, $ 47,069 0 $ 4, $0 $47,069 DI 3B L=6' (EA) 15 $ 4, $ 68,595 4 $ 4, $18,292 $50,303 DI 3B L=8' (EA) 14 $ 4, $ 68,446 7 $ 4, $34,223 $34,223 DI 3B L=10' (EA) 3 $ 5, $ 15,156 0 $ 5, $0 $15,156 DI 3BB L=4' (EA) 2 $ 4, $ 8,552 0 $ 4, $0 $8,552 DI 3BB L=6' (EA) 3 $ 4, $ 14,544 0 $ 4, $0 $14,544 DI 3BB L=8' (EA) 2 $ 5, $ 10,858 0 $ 5, $0 $10,858 DI 3C L=6' (EA) 2 $ 4, $ 8,026 0 $ 4, $0 $8,026 DI4AA L=4' (EA) 1 $ 6, $ 6,817 0 $ 6, $0 $6,817 DI 12 L=8' 0 $ 6, $ 30 $ 6, $180,000 $180,000 Total Savings $262,502 This estimate assumes: Engineering fees to redesign the roadway 16' median cannot be a ditch section, therefore CG 3 is required. 3 inlets along median curb when road is in S/E first roadside ditch inlet begins 300' from HP and inlets are required every 200' to collect runoff in the ditch to maintain freeboard Assume ditch lining for slopes 2% and greater. Unit pricing from VDOT NOVA Bid Tabs This estimate DOES NOT include drainage pipe(s) to to connect required inlets 602 South King Street, Leesburg, Virginia Phone: Fax:

62 Northstar Boulevard Phase 2 VE Assessment June 21, 2016 Page 5 Comments Summary 1. Flatten fill slopes and install berms. We agree with this suggestion and will implement along the alignment in areas outside the existing flood plain of the South Fork of Broad Run. 2. Temporary lane shift/maintain two lanes (each direction) of Route 50. We agree with this suggestion and are consistent in both phases of the proposed TMP for Route Use of alternative BMP s and purchasing Nutrient Credits. We agree with this suggestion. This is consistent with the proposed facilities and discussions with District Hydraulics Engineers. 602 South King Street, Leesburg, Virginia Phone: Fax:

63 Northstar Boulevard Phase 2 VE Assessment June 21, 2016 Page 6 Supporting Documents 602 South King Street, Leesburg, Virginia Phone: Fax:

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