| | | | | | | | Council Communication
Department: Public Works Admin
Case/Project No.: PW-24-09
Submitted by: Matthew Cox, Public Works Director | Resolution 22-328
ITEM 6.B. | Council Action: 12/19/2022 |
|
| | | | | | | | Description
Resolution authorizing the mayor to execute an agreement with Ehrhart Griffin & Associates for engineering services in connection with the East Manawa Sewer Rehab, Phase XII. Project # PW24-09 |
|
| | | | | | | | Background/Discussion
• The area of East Manawa is very flat with open ditches. There are no storm sewers in this area and the streets are thin asphalt or seal-coated rock roads. During rainfall events, considerable surface ponding occurs due to the poor drainage.
• Due to the narrow right-of-way (30 ft.) and the high water table in the area, conventional storm sewer construction is not practical. The use of porous pavement in conjunction with a drainable granular base and shallow subdrain/conveyance system was determined to be the most cost effective means available to improve the area drainage.
• The rehab program also includes installation of new sanitary sewers utilizing a vacuum system.
• Phases I thru IX are complete and included Huron Circle, Aztec Street, Blackhawk Street, Osage Street, Victor Street, East Navajo Street and the construction of the vacuum sewer pump station. Phase X is substantially complete and included the south half of Pickard Lane from Hall Walk Road to Navajo Street. Phase XI will be constructed in the spring\summer of 2023 and includes the north half of Pickard Lane from Hall Walk Road north to Navajo Street.
• This project is included in the FY24 CIP and includes a budget of $700,000 in Local Option Sales Tax funds and $300,000 in Sewer funds. The exact limits for Phase XII will be determined during the project scoping.
• EGA was previously selected from the pre-qualified list of engineers because of their successful project history and strong relationship with the Iowa DNR, and subsequently provided engineering services for the previous construction phases. As before, they will be partnering with FOX Engineering who developed the master plan for the East Manawa area, and have been part of the engineering team on each of the previous phases.
|
|
| | | | | | | | Recommendation
Approval of this resolution for the selection of Ehrhart Griffin & Associates to continue their role as project engineers for design and construction engineering services associated with Phase XII.
|
|
|