5.8.
Public Works Committee
- Meeting Date:
- 09/18/2012
- By:
- Shane Nelson, Engineering/Public Works
Title:
Sunwood Drive Project - Supplemental Agreement #1, Change Order #2 and Connexus Relocation Charges
Background:
Supplemental Agreement #1
The City Council previously approved the construction contract for City Project 12-20. This supplemental agreement addresses two items that were included in the original design, as follows:
Trail Width - The original plans included a 8' bituminous trail along the east side of Armstrong Blvd. For maintenance purposes, the City has determined that all trails should be 10' wide.
Drainage Along Armstrong - During the construction it was discovered that there is an elevation conflict between the two sets of plans. Essentially, the plans for Armstrong designed the east boulevard to existing ground. The design for Sunwood Drive and the COR TWO retail area depicted mass grading east of Armstrong to prepare the building sites for the COR TWO retail area. This resulted in approximately a 4 to 6 foot conflict in elevations, and created a drainage concern. Due to the mass grading, one catchbasin cannot be used as the depth is incorrect and there is no practical way to direct stormwater to that location when taking into consideration the COR TWO plat. After several design concepts and iterations, it was determined that the most feasible solution is extending the curb to the south 126' to prevent the runoff from Armstrong Blvd from sheet flowing onto the proposed parking area in the COR TWO.
The estimated cost increase associated with Supplemental Agreement #1 is $5,001.
Change Order #2
This Change Order is associated with the large diameter outlet pipe from the North Commons project area to the newly excavated Lake Ramsey. Currently, the storm sewer is stubbed and is directly below the right turn lane on Bunker Lake Blvd. Extending the pipe will consist of lane closures on Bunker Lake Blvd, dewatering, installing a 108" diameter manhole, installing 210 LF of 73" Arch Pipe, bituminous patching, and other miscellaneous work. It will also be necessary to lower an existing watermain that will conflict with the storm sewer. The estimated cost of Change Order #2 is $184,114.
Connexus Relocation Charges
We were recently informed by the development manager that the electric cabinet recently
installed by Connexus is in a location that will obscure the proposed development signage for the COR TWO and must be relocated. The current location was well communicated by all parties at several weekly construction meetings. However, the attendees at the weekly construction meetings did not have knowledge that this same issue was discussed approximately one year earlier. The Development Manager has provided information showing that approved locations for cabinets had been provided to Connexus in 2011. Connexus has responded indicating that some alignments have changed and there were more recent communications regarding the cabinet locations. The estimated cost provided by Connexus to relocate the cabinet is $10,620.
The City Council previously approved the construction contract for City Project 12-20. This supplemental agreement addresses two items that were included in the original design, as follows:
Trail Width - The original plans included a 8' bituminous trail along the east side of Armstrong Blvd. For maintenance purposes, the City has determined that all trails should be 10' wide.
Drainage Along Armstrong - During the construction it was discovered that there is an elevation conflict between the two sets of plans. Essentially, the plans for Armstrong designed the east boulevard to existing ground. The design for Sunwood Drive and the COR TWO retail area depicted mass grading east of Armstrong to prepare the building sites for the COR TWO retail area. This resulted in approximately a 4 to 6 foot conflict in elevations, and created a drainage concern. Due to the mass grading, one catchbasin cannot be used as the depth is incorrect and there is no practical way to direct stormwater to that location when taking into consideration the COR TWO plat. After several design concepts and iterations, it was determined that the most feasible solution is extending the curb to the south 126' to prevent the runoff from Armstrong Blvd from sheet flowing onto the proposed parking area in the COR TWO.
The estimated cost increase associated with Supplemental Agreement #1 is $5,001.
Change Order #2
This Change Order is associated with the large diameter outlet pipe from the North Commons project area to the newly excavated Lake Ramsey. Currently, the storm sewer is stubbed and is directly below the right turn lane on Bunker Lake Blvd. Extending the pipe will consist of lane closures on Bunker Lake Blvd, dewatering, installing a 108" diameter manhole, installing 210 LF of 73" Arch Pipe, bituminous patching, and other miscellaneous work. It will also be necessary to lower an existing watermain that will conflict with the storm sewer. The estimated cost of Change Order #2 is $184,114.
Connexus Relocation Charges
We were recently informed by the development manager that the electric cabinet recently
installed by Connexus is in a location that will obscure the proposed development signage for the COR TWO and must be relocated. The current location was well communicated by all parties at several weekly construction meetings. However, the attendees at the weekly construction meetings did not have knowledge that this same issue was discussed approximately one year earlier. The Development Manager has provided information showing that approved locations for cabinets had been provided to Connexus in 2011. Connexus has responded indicating that some alignments have changed and there were more recent communications regarding the cabinet locations. The estimated cost provided by Connexus to relocate the cabinet is $10,620.
Notification:
Tom Keller from Connexus was notified and invited to attend
Observations:
Supplemental Agreement #1
These revisions are necessary in order to improve drainage patterns and ease of maintenance for the trail.
Change Order #2
The existing 73" Arch pipe is significant in size and appears to be sized for the 100-year event. However, the the original Storm Water Management plan for the Ramsey Town Center lacks a narrative and is not easy to interpret. Several things have changed since the original storm water management plan has been prepared, which may warrant a more in-depth analysis of the overall storm water system in the COR.
This pipe is not necessitated by the Sunwood / Armstrong project. It is more closely related to the North Commons project and the restrictions that currently exist on the open space. If completed, this storm sewer pipe will receive runoff from areas in addition to the North Commons project.
Connexus Cabinet Relocation Charges
The location of the cabinet will obscure the proposed development sign for the COR TWO as indicated by the Development Manager. If there is no alternative sites for the sign, the only alternative is to relocate the cabinet.
These revisions are necessary in order to improve drainage patterns and ease of maintenance for the trail.
Change Order #2
The existing 73" Arch pipe is significant in size and appears to be sized for the 100-year event. However, the the original Storm Water Management plan for the Ramsey Town Center lacks a narrative and is not easy to interpret. Several things have changed since the original storm water management plan has been prepared, which may warrant a more in-depth analysis of the overall storm water system in the COR.
This pipe is not necessitated by the Sunwood / Armstrong project. It is more closely related to the North Commons project and the restrictions that currently exist on the open space. If completed, this storm sewer pipe will receive runoff from areas in addition to the North Commons project.
Connexus Cabinet Relocation Charges
The location of the cabinet will obscure the proposed development sign for the COR TWO as indicated by the Development Manager. If there is no alternative sites for the sign, the only alternative is to relocate the cabinet.
Funding Source:
The funding source for Supplemental Agreement #1 and the Connexus relocation charges would be from the project budget, and a request should be made to Connexus to reimburse costs commensurate with their responsibility for the error.
The funding source of Change Order #2 would be from the HRA and storm drainage fund.
The funding source of Change Order #2 would be from the HRA and storm drainage fund.
Staff Recommendation:
We recommend approval of Supplemental Agreement #1.
We recommend further review and analysis of Change Order #2 by City staff and the Development Manager.
We recommend approval of relocating the Connexus cabinet.
We recommend further review and analysis of Change Order #2 by City staff and the Development Manager.
We recommend approval of relocating the Connexus cabinet.
Committee Action:
Motion to reccomend approval of Supplemental Agreement #1.
Motion to recommend that further analysis be performed to evaluate the contemplated development patterns in the overall drainage area, associated runoff rates and volumes, and required storm sewer pipe sizes.
Motion to reccomend relocation of the Connexus cabinet and a request be made to Connexus for the appropriate level of reimbursement of cost.
Motion to recommend that further analysis be performed to evaluate the contemplated development patterns in the overall drainage area, associated runoff rates and volumes, and required storm sewer pipe sizes.
Motion to reccomend relocation of the Connexus cabinet and a request be made to Connexus for the appropriate level of reimbursement of cost.
Attachments
Form Review
| Inbox | Reviewed By | Date |
|---|---|---|
| Grant Riemer | Grant Riemer | 09/12/2012 12:11 PM |
| Kurt Ulrich | Kurt Ulrich | 09/13/2012 03:04 PM |
- Form Started By:
- haengineering
- Started On:
- 09/06/2012 08:59 AM
- Final Approval Date:
- 09/13/2012