R2026-49 Resolution Authorizing a Professional Engineering Services Agreement with Crawford, Murphy and Tilly, Inc., to Provide Final Design Engineering Services for the Lost Bridge North Basin and Florian Basin Inflow and Infiltration Reduction

Home Browse Search

EXHIBIT A-1 CITY OF DECATUR - PUBLIC WORKS DEPARTMENT SANITARY SEWER SYSTEM REHABILITATION FOR LOST BRIDGE NORTH (TA_3N) & FLORIAN (TA_6) BASINS SCOPE OF DESIGN PHASE SERVICES GENERAL Crawford, Murphy & Tilly, Inc. (CMT) prepared the Sanitary Sewer Alternatives Analysis (SSAA) in 2017 for the Lost Bridge North (LBN) and Florian sewer basins that experienced basement backups and overflows due to extraneous water entering the sewer system from sewer main, manhole and sewer lateral defects, as well as illegal connections. The SSAA evaluated alternatives to eliminate SSOs and basement backups, prepared opinions of cost for each alternative and performed a cost-effective analysis to determine the preferred alternative. Each basin was evaluated and compared independently. The City of Decatur (COD) submitted the SSAA to USEPA-Region 5 in late 2017 and received approval of the plan on April 24, 2025. Contained in the approval letter was an implementation schedule for both basins that shows design starting in fiscal year (FY) 2027, construction starting in FY 2028 and completing construction by December 31, 2029 (FY 2029). Also noted in the approval letter is the desire of the COD to utilize the IEPA-Infrastructure Financial Assistance Section (IFAS) State Revolving Fund (SRF) to fund design and construction costs. A Project Plan (PP) was developed for the LBN and Florian Basins and submitted to IFAS on March 10, 2025 with the intent of the COD being listed on the IFAS Intended Funding List (IFL) that is expected to be published on or before June 30, 2027. A revised PP was submitted to IFAS on December 22, 2025. IFAS is expected to approve the PP in early 2026. The cost-effective alternatives described and identified in the PP from the SSAA are: 1. Alternative 2A for LBN, which includes sewer main and manhole rehabilitation, along with lower sewer lateral rehabilitation. This alternative provides a 5-year level of protection from rainfall derived inflow and infiltration (RDII). 2. Alternative 2A for Florian, which includes sewer main and manhole rehabilitation, along with lower sewer lateral rehabilitation. This alternative provides a 5-year level of protection from RDII. Obtaining SRF funds for this project is not guaranteed. To be successful with obtaining a loan from IFAS requires strategic planning to coordinate the design and construction schedules with the SRF loan application process so that construction work is completed by December 31, 2029. To meet the schedule requirements, the intent is to prepare one set of bidding documents that covers rehabilitation of sewer mains, manholes and sewer laterals. Generally, this goal is proposed to be accomplished in accordance with the following schedule. 24006892.01 A-1-1 02/19/2026