7.9.
CC Regular Session
- Meeting Date:
- 05/24/2016
- By:
- Bruce Westby, Engineering/Public Works
Information
Title:
Adopt Resolution #16-05-086 Approving Plans and Specifications and Authorizing Bids for Improvement Project #16-00 Division A, Crackseal and Sealcoat Improvements
Purpose/Background:
Purpose:
The purpose of this case is to adopt Resolution #16-05-086 approving plans and specifications and authorizing advertisements for bids for Improvement Project #16-00 Division A, Crackseal and Sealcoat Improvements.
Background:
As part of the city's long-term Street Maintenance Program, various city streets receive cracksealing and sealcoating improvements each year to help maximize the life expectancy of the street pavement sections. Cracksealing of streets prevents stormwater runoff from seeping through cracks in the pavement and through joints between the pavement and concrete curb and gutter and/or utility castings, reducing the potential for future pavement damage due to wet subgrade soils, especially as a result of freeze-thaw cycles. Sealcoating streets helps protect pavement from the negative effects of stormwater runoff, ultraviolet rays from the sun, and oil based by-products that are deposited on pavement surfaces by vehicles.
City staff therefore prepared plans and specifications for the 2016 Crackseal and Sealcoat Improvements project which involves cracksealing and sealcoating 13.53 miles of municipal streets in various locations throughout the City. Attached is the plan sheet showing the locations of all streets proposed to receive crackseal and sealcoat improvements in 2016. Specifications are not attached but will be available for review at the Council meeting, if needed.
Attached is a cost estimate for the proposed improvements, including cost breakouts for each street segment. As shown on page 1 of the estimate, Staff proposes to fog seal two areas this year; Ramsey Meadows 2nd Addition and the Fire Station 1 parking lot. A fog seal is a light application of a diluted slow-setting asphalt emulsion to the surface of an aged (oxidized) pavement surface. Fog seals are low-cost and are used to restore flexibility to an existing pavement surface. They may be able to temporarily postpone the need for a surface treatment or non-structural overlay. In Ramsey, fog sealing was completed on several streets last year on a trial basis to determine if benefits outweigh costs. Numerous other cities have completed fog sealing over sealcoat applications in recent years and have reported benefits including that the pavement looks newer for longer, that fog sealing extends the life of the sealcoat application due to reduced loss of seal coat rock over time, which also reduces the amount of rocks that make their way into garages, homes and businesses on tires and the bottoms of shoes. However, this spring Staff observed essentially identical amounts of loose rock on streets that were fog sealed versus streets that were not. It was also observed that fog sealed streets lost much of their “new street” look after one winter of wear. Staff therefore has not observed a short-term benefit to fog sealing over sealcoating applications, and is also skeptical of any long-term benefits that would outweigh the cost for applying fog sealing over sealcoating applications on all street segments on future projects. That said, staff is proposing limited fog sealing in the Ramsey Meadows 2nd Addition so the newly sealcoated streets will better blend into adjacent streets that are newer. Fog sealing is also proposed for the parking lot of Fire Station 1 to help reduce the amount of rock being tracked onto the bay floors. The total estimated cost for fogsealing is $7,948.
Dresser trap rock was also applied to several streets last year on a trial basis in lieu of standard granite rock chips to determine if feedback received from other cities was true regarding perceived benefits to using trap rock versus granite chips. However, based on the higher bid prices received for trap rock last year, and on Staff’s field observations, there does not appear to be a benefit to using trap rock so Staff is not proposing to use trap rock in 2016. Staff will however continue to monitor the streets where trap rock and fog seal treatments were applied to see if a long-term benefit presents itself.
The purpose of this case is to adopt Resolution #16-05-086 approving plans and specifications and authorizing advertisements for bids for Improvement Project #16-00 Division A, Crackseal and Sealcoat Improvements.
Background:
As part of the city's long-term Street Maintenance Program, various city streets receive cracksealing and sealcoating improvements each year to help maximize the life expectancy of the street pavement sections. Cracksealing of streets prevents stormwater runoff from seeping through cracks in the pavement and through joints between the pavement and concrete curb and gutter and/or utility castings, reducing the potential for future pavement damage due to wet subgrade soils, especially as a result of freeze-thaw cycles. Sealcoating streets helps protect pavement from the negative effects of stormwater runoff, ultraviolet rays from the sun, and oil based by-products that are deposited on pavement surfaces by vehicles.
City staff therefore prepared plans and specifications for the 2016 Crackseal and Sealcoat Improvements project which involves cracksealing and sealcoating 13.53 miles of municipal streets in various locations throughout the City. Attached is the plan sheet showing the locations of all streets proposed to receive crackseal and sealcoat improvements in 2016. Specifications are not attached but will be available for review at the Council meeting, if needed.
Attached is a cost estimate for the proposed improvements, including cost breakouts for each street segment. As shown on page 1 of the estimate, Staff proposes to fog seal two areas this year; Ramsey Meadows 2nd Addition and the Fire Station 1 parking lot. A fog seal is a light application of a diluted slow-setting asphalt emulsion to the surface of an aged (oxidized) pavement surface. Fog seals are low-cost and are used to restore flexibility to an existing pavement surface. They may be able to temporarily postpone the need for a surface treatment or non-structural overlay. In Ramsey, fog sealing was completed on several streets last year on a trial basis to determine if benefits outweigh costs. Numerous other cities have completed fog sealing over sealcoat applications in recent years and have reported benefits including that the pavement looks newer for longer, that fog sealing extends the life of the sealcoat application due to reduced loss of seal coat rock over time, which also reduces the amount of rocks that make their way into garages, homes and businesses on tires and the bottoms of shoes. However, this spring Staff observed essentially identical amounts of loose rock on streets that were fog sealed versus streets that were not. It was also observed that fog sealed streets lost much of their “new street” look after one winter of wear. Staff therefore has not observed a short-term benefit to fog sealing over sealcoating applications, and is also skeptical of any long-term benefits that would outweigh the cost for applying fog sealing over sealcoating applications on all street segments on future projects. That said, staff is proposing limited fog sealing in the Ramsey Meadows 2nd Addition so the newly sealcoated streets will better blend into adjacent streets that are newer. Fog sealing is also proposed for the parking lot of Fire Station 1 to help reduce the amount of rock being tracked onto the bay floors. The total estimated cost for fogsealing is $7,948.
Dresser trap rock was also applied to several streets last year on a trial basis in lieu of standard granite rock chips to determine if feedback received from other cities was true regarding perceived benefits to using trap rock versus granite chips. However, based on the higher bid prices received for trap rock last year, and on Staff’s field observations, there does not appear to be a benefit to using trap rock so Staff is not proposing to use trap rock in 2016. Staff will however continue to monitor the streets where trap rock and fog seal treatments were applied to see if a long-term benefit presents itself.
Notification:
No notifications were required for this case.
Observations/Alternatives:
Observations:
Streets proposed to receive crackseal and sealcoat improvements under Division A of the 2016 Street Maintenance Program were selected by City staff based on various criteria including their Pavement and Surface Evaluation Rating (PASER), previous maintenance histories, project scope, and other more intangible criteria.
If Council approves plans and specifications and authorizes advertisements for bids, advertisements will be published in the Anoka Union Herald and in Finance and Commerce on May 27th and on June 3rd. Bids would then be opened June 21st, and Council would be asked to accept bids and award a contract for construction on June 28th. Work would then be allowed to commence after the July 4th holiday weekend, and would be completed by mid-August.
Alternatives:
Alternative #1 - Motion to adopt Resolution #16-05-086 approving Plans and Specifications and authorizing Advertisements for Bids for Improvement Project #16-00 Division A, Crackseal and Sealcoat Improvements.
Alternative #2 - Motion to deny adoption of Resolution #16-05-086 at this time.
Streets proposed to receive crackseal and sealcoat improvements under Division A of the 2016 Street Maintenance Program were selected by City staff based on various criteria including their Pavement and Surface Evaluation Rating (PASER), previous maintenance histories, project scope, and other more intangible criteria.
If Council approves plans and specifications and authorizes advertisements for bids, advertisements will be published in the Anoka Union Herald and in Finance and Commerce on May 27th and on June 3rd. Bids would then be opened June 21st, and Council would be asked to accept bids and award a contract for construction on June 28th. Work would then be allowed to commence after the July 4th holiday weekend, and would be completed by mid-August.
Alternatives:
Alternative #1 - Motion to adopt Resolution #16-05-086 approving Plans and Specifications and authorizing Advertisements for Bids for Improvement Project #16-00 Division A, Crackseal and Sealcoat Improvements.
Alternative #2 - Motion to deny adoption of Resolution #16-05-086 at this time.
Funding Source:
Attached is a cost estimate for the proposed improvements, including cost breakouts for each street segment, which shows estimated project costs for all improvements identified in Division A of the 2016 Street Maintenance Program at $519,411. This includes 14% indirect costs for administrative, engineering, legal and financing.
A total of $500,000 was budgeted for 2016 cracksealing and sealcoating work which leaves an estimated funding gap of $19,411. However, staff anticipates bids will be favorable and will therefore be less than the engineer’s estimate, potentially eliminating the funding gap. If the lowest responsible bid ends up being higher than $500,000, staff is prepared to identify an appropriately small street segment to pull from the project to reduce costs below $500,000. Then whatever funds remain could be used to contract for additional spray patching of streets, which has generally proven to be effective in sealing cracks and filling small potholes, and has been well-received by the public. This work would supplement the spray patching previously completed this spring. When bids are received for the proposed crackseal and sealcoat improvements, staff will evaluate available funding options and will be prepared to provide a recommendation to Council when bids are presented for approval of a contract on June 28th.
A total of $500,000 was budgeted for 2016 cracksealing and sealcoating work which leaves an estimated funding gap of $19,411. However, staff anticipates bids will be favorable and will therefore be less than the engineer’s estimate, potentially eliminating the funding gap. If the lowest responsible bid ends up being higher than $500,000, staff is prepared to identify an appropriately small street segment to pull from the project to reduce costs below $500,000. Then whatever funds remain could be used to contract for additional spray patching of streets, which has generally proven to be effective in sealing cracks and filling small potholes, and has been well-received by the public. This work would supplement the spray patching previously completed this spring. When bids are received for the proposed crackseal and sealcoat improvements, staff will evaluate available funding options and will be prepared to provide a recommendation to Council when bids are presented for approval of a contract on June 28th.
Recommendation:
Staff recommends Alternative Action #1.
The Public Works Committee reviewed the proposed improvements at their May 17th regular meeting and unanimously recommended that the City Council approve plans and specifications and authorize advertisements for bids.
The Public Works Committee reviewed the proposed improvements at their May 17th regular meeting and unanimously recommended that the City Council approve plans and specifications and authorize advertisements for bids.
Action:
Motion to approve or deny adoption of Resolution #16-05-086 approving plans and specifications and authorizing advertisements for bids for Improvement Project #16-00 Division A, Crackseal and Sealcoat Improvements.
Attachments
Form Review
| Inbox | Reviewed By | Date |
|---|---|---|
| Diana Lund | Diana Lund | 05/19/2016 07:11 AM |
| Len Linton | Len Linton | 05/19/2016 10:39 AM |
| Kurt Ulrich | Kurt Ulrich | 05/19/2016 02:38 PM |
- Form Started By:
- Bruce Westby
- Started On:
- 05/17/2016 09:23 AM
- Final Approval Date:
- 05/19/2016