Title
Grasslands Subdivision Detention Basin - Proposal
History
In 2005, the Village Board approved Christopher B. Burke Engineering (CBBEL) to complete the engineering for the Grasslands Detention Basin in an effort to mitigate overland flooding in the Grasslands Subdivision. Since that time, the initial pond construction (Phase I) has been completed. Dam construction (Phase II) will increase storage capacity to final design parameters. The Army Corps of Engineering approval was received in late 2009. Permitting from the Illinois Department of Natural Resources - Office of Water Resources (IDNR-OWR) has been ongoing and required contract increases in 2010 and 2013. Since initiating this effort, the IDNR has once again changed the requirements for issuing the permit. A new fee structure has been implemented requiring the payment of $5,600 for review. To avoid further delays, CBBEL paid the fee on behalf of the Village. In addition, spillway design requirements were changed, necessitating a re-design and re-engineering of the new structure. It is not anticipated that there will be any other hurdles preventing the final approval of the permit.
At staff’s request, CBBEL has submitted an accounting of the additional expenses required to finalize the permit process. These are anticipated to be the last items necessary prior to bidding the project for construction. The total cost for the proposal from CBBEL is $19,938.
On February 2, 2015, this item was reviewed and approved by the Public Works Committee and referred to the Board for approval.
Financial Impact
There are sufficient funds in the Storm Water Improvement Fund capital account #031-6007-47050 to cover the cost of this work.
Recommended Action/Motion
I move to approve to accept the proposal from Christopher B. Burke Engineering (CBBEL) of Rosemont, Illinois, for the additional IDNR permitting expenses in an amount not to exceed $19,938, and amend the existing agreement.