Title
Consider and take action on a resolution authorizing a professional services agreement with LJA, Inc. for design work related to the Western League City Regional Master Drainage Plan (DR2701) in an amount not to exceed $200,000 (Executive Director of Development Services)
Background:
Approval of this resolution will authorize the City Manager to enter into an agreement with LJA, Inc. (LJA) for a drainage study in the City’s Westside Master Plan area in an amount not to exceed $200,000.
This project, included in the City’s FY2027 CIP, is a follow-up phase to the City’s recently adopted Westside Master Plan. As part of the initial Westside Master Plan scope, a very high-level Regional Detention Pond Analysis was completed. This project will further define the drainage needs within the Westside Master Plan area.
The scope of services includes a Drainage and Detention Assessment to develop detailed hydrologic and hydraulic models to support proposed detention and channel configurations to serve the future development of the western portion of League City. The estimated project duration is 12 months.
1. City-owned regional hydrologic (HEC-HMS) and hydraulic (HEC-RAS) model for existing and ultimate conditions across all seven (7) western service areas, to be used as the required baseline for all future westside drainage impact analyses
2. Corridor and pond reservation map showing trunk channel alignments, detention pond sites, and minimum right-of-way widths at a level of precision sufficient to require dedication or reservation at platting
3. Control Table for each service area establishing: allowable release rates; design tailwater and water surface elevation at each tie-in point; minimum outfall flowline elevation; and interim on-site detention rates until the regional facility is constructed
4. Interim to Ultimate Rules ensuring that on-site detention ponds built ahead of the regional system are sited and sized to wrap into, or convert to, the regional facility under ultimate conditions
5. Pond and channel cross-section configurations compatible with the City’s Park Overlay District (POD) requirements, so that developer amenity choices can qualify for parkland credit where appropriate
6. Planning-level cost-per-acre estimates for each service area, including land, sufficient to anchor future cost-share and credit negotiations
Staff recommends the approval of this PSA.
Attachments:
1. Proposed Resolution
2. CIP Project Sheet
3. PSA Western League City Regional Master Drainage Plan
4. Aerial Map
CONTRACT ORIGINATION: Professional Services Agreement reviewed and approved by City Attorney’s Office
FUNDING
{X} Funding in the amount of $200,000 is available from Miscellaneous Capital Projects Fund, fund 5015, with expenses charged to project expense string DR2701-PLAN DESIGN-DESIGN-TS CASH.
STRATEGIC PLANNING
{X} Addresses Strategic Planning Critical Success Factor #1 - Develop & Maintain our Infrastructure