From: James Quin
Sent: Tuesday, March 15, 2011 1:46 PM
To: Liz Kennedy
Subject: FW: Dam Breach and Design Spillway Analysis
Attachments: RH Fee Est. - Dam Breach 3-2-2011.xls; Rich. Elem Pond Dam Safety Analysis 3-2-11.docx
Agenda item Number 15.
After the redesign of the Richland Elementary Detention Pond (REDP) grades, Halff & Associates submitted a proposal requesting additional funds for 1) redesign grades required by BISD; 2) preparation of an Environmental Permit (404) for the REDP; and, 3) coordination with TCEQ to determine if the pond’s spillway required additional study to meet TCEQ’s Dam Safety (DS) and Emergency Action Plan (EAP) requirements. According to the consultant, this is a new regulation and was not anticipated to be required.
Halff met with TCEQ and it was determined that a detailed analysis was required to insure the spillway on the west side of the pond met their safety requirements. Attached, is a detailed explanation from Halff of the work required and associated costs. The total cost of $21,837.00 is a not-to-exceed cost and will be billed on a unit cost times a multiplier which means only the amount of time spent developing the report would be billed but will not to exceed $21,837.00.
Therefore, please place on the council’s March 22, 2011 agenda to approve the additional not-to-exceed expenditure of $21,837.00 to Halff & Associates for additional study of the REDP for Dam Safety and Emergency Action Plan. Please contact me if you have any questions.
Director of Public Works
6700 Rena Dr.
Richland Hills, Texas, 76118