Page 318 - N. Richland Hills General Budget

Drainage Capital Projects

Project Name Project Description
Big Fossil Creek Flood Study - This project consists of performing a flood study on the existing BFC-7 Tributary to Big Fossil Creek. BFC-7 begins just
BFC7 - Continuing Project south of Loop 820 with a TxDOT outfall channel south of the highway, then south 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.

Calloway Branch Channel Repair This is for the repair of failing channel along the Calloway Branch Channel that has resulted in the loss of material in
Project - Continuing Project several backyards along Waggoner Ranch Road. Erosion caused by excessive rains following the years of recent
drought caused bank failure along the west bank of the Calloway Branch channel adjacent to the Graham Ranch
subdivision. This project will restore the west bank in the vicinity of the Graham Ranch properties and fortify the bank to
prevent a future recurrence. Because the project is located within FEMA's regulatory floodway, both a CLOMR and
LOMR will be required.

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

Concrete Lined Channel This project involves ongoing rehabilitation of the City's seven (7) miles of concrete lined channels. The scope of the
Rehabilitation Project - New project will include repairing areas of channel that have deteriorated, cracked, dropped, collapsed, heaved, or hold water
Project 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.

Emerald Circle Drainage This project consists of extending an underground storm drain system in the Emerald Lakes subdivision.
Project - Continuing Project

Mackey Creek Flood Study - This project consists of creating new hydrologic and hydraulic models to provide regulatory floodplain mapping for
Continuing Project 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.

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