Page 315 - FY 2021-22 ADOPTED BUDGET

1.1.3 Drainage Facilities

Storm Drain Condition Assessment - The City is conducting a condition assessment
of the City’s entire existing storm drain system. This review will include sending a
remote camera through the storm drain system to digitally record its condition. The
scope of work will include surveying each inlet, outlet and storm drain manhole location
to develop an up-to-date map of the system. The review will assess one quadrant of the
City’s storm system each year over a four-year period. The project also provides the
City with credits for the Stormwater Management Program and Community Rating
System, that help to reduce flood insurance rates.

Cedar Creek Townhome Drainage Project - The Cedar Creek Townhomes are
located in northeast Benbrook between Bellaire Drive and a natural oxbow of the Trinity
River. During heavy rain events, water flows have eroded soil and undermined the
structural integrity of the City’s drainage outfall at this location. The project includes
removal of the existing headwall and extending the storm drain back in line with the
bank of the oxbow. A new headwall will then be constructed at the outfall and the area
above the extended pipe will be backfilled.

Timberline Drainage Project - Several local streets that directly connect to Timberline
Drive significantly flatten out prior to their connection to the collector street. As a result,
stormwater ponds on the local streets. The project will extend storm drainpipes from the
Timberline Drive system to the local streets. New stormwater curb inlets will be installed
on the local streets allowing stormwater that would previously pond to flow into the storm
drain system.

Low Water Crossing Project – The low water crossing is located on Lake Shore Drive
behind the Benbrook Stables. The road must be closed during rain events for safety
reasons. The culverts under the low water crossing are deteriorated and need to be
replaced. The new culverts will allow water to flow more efficiently under the low water
crossing thereby reducing the number of times the crossing has to be closed during rain
events.

Plantation East Channel Project - Sediment has built up over the years and needs to
be removed from the channel bottom to allow for better water flow. The project scope
includes the repair of missing or damaged perforated blocks that armor the channel
bottom.

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