Leroux Street Improvements - CMAR

Leroux Street Improvements - CMAR
City of Flagstaff
EMC Role
WLB Engineering

Project Overview

This project consisted of replacing the existing water main through the heart of downtown Flagstaff. The project included over 3,300 LF of 8" waterline, replacement of over 40 water services and 20 sewer services. EMC also constructed 2,700 LF of curb and gutter, over 5,600 SF of sidewalk and over 10,000 SY of AC paving. This project included many challenges, such as site congestion, working with local businesses and residents to keep access and its proximity to downtown as well as half of the new waterline needed to go through rock. EMC utilized different methods to work around some of these obstructions such as:

  • EMC worked with the design engineer and raised a section of the new water main to avoid some of the hard rock, which in turn expedited the schedule saving 1 - 2 weeks.
  • Water ties ins were schedule during specific time frames in the early hours of morning to accommodate different stakeholders needs such as the bars, restaurants and hotels to make sure it did not negatively effect their business.
  • Extra water valves were added to limit the amount of water shutdown time, ensuring we were able to hit the required downtime on the businesses.
  • EMC worked with the City and design engineer to move valves of add valves in order to keep residents online during testing of the new water main, allowing for very minimal disruption at tie over.
  • Installing a temporary, above ground, water services was utilized in an instance were a fire line per the plan was actually a service. This temporary service allowed for EMC to completed the new line while keeping the bars, restaurants and offices functioning as usual.
  • All trenches were backfilled or plated after work hours to ensure the safety of the general public.

Several existing utility lines had to be relocated, EMC coordinated relocations with each Utility Franchises to align with our master schedule, minimizing overall impact.

EMC, with a complicated project in a congested part of town, was able to bring this project 4.5 months ahead of schedule. An un-contracted promise to the downtown business alliance of completing the downtown area prior to Memorial Day weekend was delivered 3 weeks ahead of schedule. This was accomplished by being able to work through the winter months, and being a local contractor allowed us the ability to remobilize as soon as acceptable weather presented itself. Along with being ahead of schedule EMC was able to deliver this project under budget, proving that our GMP pricing structure was accurate.

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