Agenda

Back to Calendar Return

City Council Regular Meeting

Meeting Date:

07/13/2021

BACKGROUND

As a part of the City’s Street Maintenance program, the Public Works Street Department is scheduled to seal the street surfaces within the Mesa Oaks Sub-division in FY 2021. Under our streets program, Public Works is responsible to maintain the pavement on streets that score at 75 or higher on the pavement index.

The method being recommended for the Mesa Oaks project is an alternative to slurry seal, although in application and appearance, is similar to a slurry seal. A slurry seal is the application of a very thin layer of asphalt emulsion with a fine limestone aggregate that seals the current road surface and gives a “like-new” appearance to the street. It is intended for streets that have lower volumes of traffic and a good sub-base structure. The sealing of the surface provides a like new condition that can extend the maintenance time frame by five to seven years with a standard slurry seal.

Contractors who perform standard slurry seals warranty the work for 2-3 years for defects of application. In lieu of a standard slurry seal, Public Works plans to use this enhanced product, HA5, that promises a longer life in the appearance of the roads as well as extending the time before additional maintenance would be needed. The HA5 product has been in use for over ten years around the nation but only recently was it made available by a contractor in Texas.

Public Works staff have evaluated the product, visited locations where it has been used both post-application and during the application process, and have used it previously in Schertz. HA5 is a patented formula that includes polymers and other products in the asphalt emulsion and has a fine slate aggregate. It is expected that this formula will extend the maintenance time frame to seven to ten years and the warranty is for five years. It is applied like the standard slurry seal but with two passes over the street surface instead of one.

If City Council authorizes entering into an agreement with Andale Construction, Inc for the application of HA5 in the Mesa Oaks Subdivision, it is anticipated the work will be scheduled for this work by mid- to late- August. Public Works will coordinate this project with the Mesa Oaks HOA. PW will share the proposed schedule with all the residents via door hangers attend HOA meeting(s) to answer questions and explain the process in more detail. As with any slurry seal, there is a cure period after the product is applied. However, even though the HA5 product requires two passes laying it down and the standard slurry seal requires a single pass, the cure period is the same with a requirement of no vehicle traffic overnight. The contractor will be providing shuttle services for residents, postal service, etc. during the cure period of each street, and it is anticipated this staged process will require five days to complete the entire subdivision.

This product costs $3.05 SY. The HA5 product is patented and only licensed to one contractor in Texas (Andale Construction, Inc.). The Street Department has utilized this product in Arroyo Verde in 2018, and continues to perform well and looks great. It will serve well in the Mesa Oaks Subdivision. With only one vendor available, staff is recommending contracting with Andale Construction, Inc. as a sole source vendor.

GOAL

To maintain the streets with a product to increase the life expectancy and reduce maintenance.

COMMUNITY BENEFIT

Applying the HA 5 asphalt preservation product will increase the life expectancy of the streets and decrease the maintenance required in this subdivision over the next seven to ten years.

SUMMARY OF RECOMMENDED ACTION

Staff recommends Council approve Resolution 21-R-63 authorizing the City Manager to enter into a contract with Andale Construction Inc. in the amount of $70,753.35 with a contingency of $7,075.33 for a not to exceed amount of $77,828.68

FISCAL IMPACT

This project will be funded from current budgeted Street Maintenance funds approved by City Council in the FY 2020-2021 budget

RECOMMENDATION

Attachments
21-R-63
21-R-63
21-R-63
Res. 21-R-63