Item 4H - MemoCITY OF
SOUTHLAKE
MEMORANDUM
(August 20, 2024)
To: Alison Ortowski, City Manager
From: Rob Cohen, Director of Public Works
Item 4H
Subject: Approve Supplement Agreement No. 1 for an Engineering
Services Agreement with Teague Nall and Perkins, Inc. (TNP) for
additional engineering design, easement, and construction
phase services related to the Morgan Road Drainage
Improvements Project in an amount not to exceed $140,000.
Action
Requested: Approve Supplement Agreement No. 1 for an Engineering Services
Agreement with Teague Nall and Perkins, Inc. (TNP) for additional
engineering design, easement, and construction phase services
related to the Morgan Road Drainage Improvements Project in an
amount not to exceed $140,000.
Background
Information: This supplement will provide additional engineering services,
additional topographic survey, Subsurface Utility Engineering (SUE),
Construction Phase Engineering services, easement document
preparation and support for easement acquisition for the Morgan
Road Drainage Improvements Project. The additional scope
included in this supplement is to re -design the ditch along the west
side of Cedar Court, along with items to address a portion of Sleepy
Hollow, if it is determined during design that this is necessary.
Stormwater generally drains from west of Morgan Road to the
northeast along Cedar Court and Sleepy Hollow Trail, ultimately
discharging into Higgins Branch. The original ESA focused on
improvements along Morgan Road and within the existing channel
between Morgan Road and Cedar Court. The existing earthen
channel is currently being maintained by City crews. The flowline has
been reestablished at least twice since 2020.
During design and after discussing with residents in the area, it was
determined that additional effort would be necessary to alleviate
ponding near the southern boundary of 1725 Sleepy Hollow Trail and
ensure the improved channel between Morgan Road and Cedar
Court can outfall as designed. Additionally, there is an area of
ponding on the west side of Cedar Court necessitating drainage
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Item 4H
improvements. During the design effort it was discovered that a
portion of the earthen channel appears to not be fully located within
the existing easement. The agreement amount for these services is
not to exceed $140,000 and includes $17,385 in contingency for any
additional engineering services.
The existing drainage system is not working as originally designed
due to multiple iterations of maintenance performed and requires a
re -design to improve efficiency and reduce the risk of damage to
infrastructure and properties along the flow path. This is why the
decision was made to move forward with the original ESA that was
approved March 8, 2023 by the City Manager's Office (CMO). This
ESA was recommended by City Staff and within CMO approval
authorization and within the project budget. The design of this project
is currently expected to be completed by Spring 2025 and is
projected to begin construction in Summer 2025, dependent on
upcoming CIP budget approval. This project is aligned with the
Sustainability Master Plan as Objective 10.6.
Financial
Considerations: This supplement is not to exceed $140,000. Funding for this
supplement agreement No. 1 is budgeted in the approved FY 2022 -
2024 Stormwater Utility System District Funds. This award is within
the project budget. On March 8, 2023, an ESA for design services
totaling $49,955 was executed. These services included engineering
design services, surveying services and direct expenses.
Strategic Link: This item links to the City's Strategy Map strategic focus area of
Infrastructure and Development. It specifically relates to the City's
Objective, F2: Investing to Provide and maintain High -Quality Public
Assets.
Citizen Input/
Board Review: None.
Legal
Review: The proposed agreement is a standard agreement that the City
Attorney has reviewed and approved.
Alternatives: The City Council may approve or deny the contract.
Staff
Recommendation: Approve Supplement Agreement No. 1 for an Engineering Services
Agreement with Teague Nall and Perkins, Inc. (TNP) for additional
engineering design, easement, and construction phase services
related to the Morgan Road Drainage Improvements Project in an
amount not to exceed $140,000.
Supporting
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Item 4H
Documents: Attachment A: ESA Morgan Road Drainage Improvements Executed
Attachment B: Supplement Agreement No. 1 for ESA Morgan Road
Drainage Improvements for signature
Staff
Contact: Rob Cohen P.E., Director of Public Works
Kevin Ferrer, P.E., City Engineer
Tiffany Matthews, P.E., Civil Engineer
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