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ADOPTED | BUDGET

Drainage Capital Projects

Project Name Project Description
Big Fossil Creek Flood This project consists of performing a flood study on the existing BFC-7 Tributary to Big Fossil Creek.
Study - BFC7 - Continuing BFC-7 begins just south of Loop 820 with a TxDOT outfall channel south of the highway, then south
Project into the Meadow Lakes subdivision, including portions of Meadow Lakes Drive, Lake Side Circle,
Pebble Court, and the two lakes between Riviera Drive and Meadow Lakes Drive. The flood study
would update FEMA's model to reflect the current hydrology and hydraulics, and upgrade this area to a
Zone AE from its current Zone A status. The engineering budget for this project includes FEMA review
fees for the Letter of Map Revision (LOMR) that will be required to update the maps.

Channel Cleaning / Street This is a recurring program that consists of cleaning out sediment that has built up over time in some of
Drainage Improvements - the City's earthen channels. This project also consists of repairing curb & gutter sections that currently
Continuing Project pond water in existing streets.

Concrete Lined Channel This project involves ongoing rehabilitation of the City's seven (7) miles of concrete lined channels.
Rehabilitation Project - The scope of the project will include repairing areas of channel that have deteriorated, cracked,
Continuing Project dropped, collapsed, heaved, or hold water due to heavy ground movement and/or age. The needed
repairs include patching of channel walls and channel bottoms, replacing wall sections, and replacing
channel bottom sections to ensure proper drainage. The intent is to utilize $250,000 in funding every
other year to arrive at a total project amount of $1,000,000 over seven years.

Project Status: Confirming scope and location of work to bid project to external contractors.

Mackey Creek Flood Study - This project consists of creating new hydrologic and hydraulic models to provide regulatory floodplain
Continuing Project mapping for Mackey Creek from upstream of Shauna Drive to Big Fossil Creek (approximately 2.4
miles). This study would also identify potential future capital improvement projects to reduce the size of
or completely eliminate the floodplain within the study area. The original study for Mackey Creek was
done in 1985 with the City's Master Drainage Plan. New topographic data is available along Mackey
Creek and new floodplain modeling techniques would be used in the study.
Project status: Flood study is complete. Study findings include a minor decrease in floodplain limits.
Future drainage infrastructure (approx. $4M) could further reduce floodplain limits.

Meadow Lakes BFC-7 This project consists of upsizing and augmenting the existing storm drain system from north of Surrey
Drainage Improvements - Court to the outfall in the eastern lake in the Meadow Lakes neighborhood. The engineering firm that
New Project performed the flood study provided three infrastructure alternatives, including a regional detention pond
immediately south of the Loop 820 frontage road and two different underground storm drain alignments
in excess of 1,500 linear feet within the Meadow Lakes Addition to convey stormwater from the north
into the upper lake behind the homes on Lake Side Circle and Pebble Court.

North Hills Addition - Bewley This project consists of designing and constructing public drainage improvements serving a portion of
Drive Drainage the North Hills Subdivision. This area was developed decades ago with no underground drainage. The
Improvements - Continuing scope of the improvements consists of installing approximately 450 LF of concrete flume, installing
Project grouted rock riprap at the end of the flume to prevent erosion.

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