Fourmile Canyon Drive Reconstruction & Fourmile Creek Restoration

Boulder County Transportation and the project contractor, Lawrence Construction, hosted a public meeting on Aug. 29 to share information about the project regarding working hours, phasing, travel impacts, staging, etc. and answer questions. Staff from the county and Lawrence were on-hand. View the meeting handout.

Construction will start in early October 2018, but surveying and other preparatory activities are underway.

• Construction Logistics
  • 8 a.m. to 4:30 p.m. – Monday through Friday – No work on major holidays
  • Delays (for this project) can total 15-minutes between CO Hwy 119/Boulder Canyon & Salina Junction
    • Current Delays as of Nov. 12, 2018
      • 1000 Block of Fourmile Canyon Drive – Retaining wall site – road reduced to one lane
        • Traffic Signal in Place – four-minute wait time if vehicle is stopped as signal turns red
      • 1500 Block of Fourmile Canyon Drive – Retaining wall site – road reduced to one lane
        • Traffic Signal in Place – four-minute wait time if vehicle is stopped as signal turns red
        • Signals in place 24/7
      • There are also delays on Upper Fourmile – Salina to Sunset
  • Work may require longer delays or road closures due to work taking place underneath the road
    • We are hopeful there will only be single-lane closures, but certain activities may not be feasible and/or safe without a road closure
  • Work will take place in two separate zones
    • South Zone – 1-mile up from CO 119 to Poorman Road
      • Work will begin in this zone in October 2018
    • North Zone – Logan Mill Road to Salina Junction
      • Work will begin in this zone in early 2019
  • No Blasting
    • Retaining walls will be built on the stream side
    • Drainage improvements
    • Streambank/roadside armoring & stabilization using walls and rip-rap
• NO NONRESIDENTIAL/RECREATIONAL CYCLING IN FOURMILE CANYON OR GOLD RUN/SALINA
  • 8 a.m. to 4:30 p.m. – Monday through Friday – Until further notice
    • CYCLING WILL BE PERMITTED NOV. 22 to 25 DURING THE THANKSGIVING HOLIDAY
  • Residential cycling excepted
    • Must carry valid identification proving residency
    • Residents can also receive a cycling pass that they can show – contact information at the bottom of this page
  • Cycling allowed on major holidays when no work is taking place – Labor Day, Thanksgiving, Christmas, New Years Day, etc.
  • Map of restricted roads
  • Boulder County Sheriff’s Office enforcing restrictions
    • Violators could be subject to citation by law enforcement
  • Restrictions in place due to safety concerns stemming from extremely high volume of flood recovery-related construction activity throughout the canyon.

Introduction/Background

This webpage is your source for information regarding permanent flood recovery-related reconstruction in lower Fourmile Canyon between Boulder Canyon Drive/CO 119 and Salina Junction.

Background:

In September 2013, flood waters either damaged or destroyed approximately 1.5 miles of two sections of Fourmile Canyon Drive between Boulder Canyon Drive and Salina Junction. The lower portion (south section) starts about 1-mile up from Boulder Canyon Drive and extends to Poorman Road, and the upper portion (north section) starts near Logan Mill Road and extends up to Salina Junction. The projects to repair Logan Mill Road/Bridge, Upper Fourmile Canyon & Gold Run Road are separate from this project.

DESIGNS

Construction Plans – Oct. 24, 2018

• Introduction
• Survey Control and Key Maps
• Roadway Removals/Resets and Tree Inventory
• Roadway and Driveway Plans
• Drainage Plans
• Retaining Walls and Guard Rails
• Stormwater Master Plan and Cross Sections

99% Complete Plan Set – Uploaded Aug. 31, 2018

This set is not the construction-ready set that includes information from individual property agreements. Those will be available soon.

• Introduction
• Geometric Layout and Removals
• Tree Inventory
• Roadway
• Roadway Profiles
• Drainage Plans
• Drainage Details
• Retaining Walls
• Cross Sections
• Suggested Phasing

90% Complete Plan Set for Roadway Work – Uploaded March 9, 2017

This plan set has been broken into smaller pieces to make the files easier to open. The files below include both the north and south sections of lower Fourmile Canyon Drive (Hwy 119 to Salina Junction). These plans will continue to be revised as we work with impacted property owners.

• Pages 1 to 34 – Title Sheet, Symbols, Notes, Typicals, Quantities, Tabulations, Survey Control, Key Map, and Geometric Layout
• Pages 35 to 50 – Removals & Resets
• Pages 51 to 79 – Tree Inventory*
  • *NOTE – The tree inventory is still being updated and do not depict the actual tree figures. We’re also working on contract language that will require the contractor to save as many trees as possible. While it is unlikely we will be able to prevent all tree removals, we will ensure that only those tree that are absolutely necessary will be removed.There will also be a large revegetation effort at the end of the project.
• Pages 80 to 109 – Roadway Plans & Profiles
• Pages 110 to 125 – Driveways
• Pages 126 to 159 – Creek and drainage plans
• Pages 160 to 221 – Culverts & Retaining Walls
• Pages 222 to 250 – Guardrail, Construction Phasing*, and Storm Water Master Plans
  • *NOTE – The Construction Phasing Plans are only suggestions made by our engineering consultant. The county is working internally on a plan to complete this project with minimal impacts to residents and the traveling public.
• Pages 251 to 291 – Cross Sections

This plan set has been broken into smaller pieces to make the files easier to open. The files below include both the north and south sections of lower Fourmile Canyon Drive (Hwy 119 to Salina Jct.)

Lower Fourmile Creek Stream Restoration Plans – Uploaded Feb. 23, 2017

These are the designs that will be used to guide the stream restoration component of the project. The plan set has been broken into smaller sections for easier downloads.

• Pages 1 to 8
• Pages 9 to 17
• Pages 18 to 24

60% Complete Phase for Roadway

This plan set has been broken into smaller pieces to make the files easier to open. The files below include both the north and south sections of lower Fourmile Canyon Drive (Hwy 119 to Salina Junction). These plans will continue to be revised as we work with impacted property owners.

• Pages 1 – 19 = Introductory pages – Standards & Keys
• Pages 20 – 35 = Roadway Removals
• Pages 36 – 63 = Tree Inventory
• Pages 64 – 93 = Roadway Plans & Profiles
• Pages 94 – 98 = Creek Plans & Profiles
• Pages 99 – 113 = Driveways
• Pages 114 – 137 = Drainage Plans & Profiles
• Pages 138 – 160 = Culverts & Retaining Walls
• Pages 161 – 187 = *Phasing Notes & Source Water Master Plan (SWMP)
  • *NOTE – The phasing plans are only a suggestion from the engineering consultant and are not the final way the way the project will be constructed. The county is working internally on options for construction timing and travel impacts
• Pages 188 – 228 = Cross Sections

Lower Fourmile Canyon Drive Reconstruction Options that helped inform the 60% phase.

Public Meetings:

• Oct. 19, 2018 – A preconstruction BBQ event was held at the Poorman Firehouse to meet project personnel and answer questions
• Aug. 28, 2018 – A preconstruction meeting was held with the community to talk about the project and its impacts to residents and travelers
• May 25, 2016 – Open House to Present latest version of drawings (30%) for two sections of Lower Fourmile
  • Meeting displays
  • Lower Fourmile Canyon Drive Reconstruction Options
  • Meeting comments
• September 2015 – Update from Director Gerstle on Designs
  • This letter was sent to Fourmile Canyon residents on Sept. 16, 2015 as an update on what has been happening since the July 28 public meeting.
• July 28, 2015 – Public meeting on updated 30% designs
  • Meeting presentation
  • Meeting notes from Boulder County staff and consultants
  • South Scroll Plot
  • North Scroll Plot
  • Cultural Resources – Existing Conditions – Memo from Pinyon Environmental
  • Fourmile Canyon Wildlife and Tree Memo
  • Fourmile Canyon Biological Resources Report
• July 2015 – Update from Director Gerstle on Designs and Construction Plans
• June 16, 2015 – Presentation of refined plans (30% phase) and public comment/input
  • Presentation
  • Plan Set 1
  • Plan Set 2 – Road
  • Plan Set 3 – Drainage
  • Plan Set 4 – Drainage
  • Plan Set 5 – Walls
  • Plan Set 6 – Rock Cross-section
  • Plan Set 7 – Roadway Cross-section
  • Typical Creek cross-section
• Sept. 3, 2014 – Presentation of preliminary plans (15% phase) and public comment/input
  • Overview Map
  • Meeting Comments and responses from Engineering Team
• June 9, 2014 – Public meeting to discuss preliminary plans for reconstruction

Project Contacts:

• Andrew Barth – Communications – 303-441-1032 or email
• Mohammed Said – Project Engineer – 303-441-1571 or email
• Project Comment Form