902 N. Doolittle Rd. Edinburg, TX 78542 (956) 292-7080




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ProjectPrecinctEngineeringConstructionLatest Update
Raymondville Drain All S & B Infrastructure, LTD December 2017
OverviewStatus
The Raymondville Drain Project currently exists as an authorized federal project with the US Army Corps of Engineers (USACE) as the Project for Flood Control, Lower Rio Grande Basin, Texas under Title IV, Section 401 of the Water Resources Development Act (WRDA) 1986, as amended by WRDA 2007. Hidalgo County Drainage District No. 1 (HCDD No. 1) is the lead sponsor, and once constructed the project will address the following:

1. Regional Storm Water Management. The majority of all major storm water from Hidalgo County passes through Willacy County to outfall to the Laguna Madre and the Gulf of Mexico. The Raymondville Drain Project, once constructed, will provide storm water management on a regional basis (ultimately contributing to improvements to watersheds of three counties) by providing a new channel that connects to existing channels, widening of existing channels, as well as additional improvements to the approximate 63-mile drainage system of in-line and off-line detention, reservoirs, and control structures that stretches from Edinburg Lake (Hidalgo Co.) to the Laguna Madre (Willacy Co.). The typical width of the proposed channel is approximately 350-feet wide, with a 12-foot average depth (see attached picture & sheet).

The proposed system will provide opportunity for significant flood reduction for areas of Hidalgo County, as well as the City of Raymondville and Willacy County. In fact, the Raymondville Drain Project is proposed to ultimately follow the alignment of an existing channel that is owned by Delta Lake Irrigation District (DLID) through the eastern portion of Hidalgo County and all of Willacy County. Coordination is on-going with DLID to ensure their concerns and issues are addressed, as well as their input, to ultimately culminate into an inter-local agreement between HCDD No. 1 and DLID regarding the maintenance and operations of the project once constructed.

The project was ranked as the No. 1 project for the 2012 Lower Rio Grande Valley Regional Drainage Plan. This plan is one-of-a-kind, having brought 4 counties and representatives from over 212 entities together over a 2-year period to develop a regional storm water management plan, ranking and voting on needed projects for the area. Out of 211 projects with estimated total construction cost $1.2 Billion, the Raymondville Drain project ranked No. 1 in the large project category.

2. Environmental Mitigation and Preservation. Even without rain or any storm event, the existing main channels of HCDD No. 1’s drainage system are always “wet”, carrying 2 ~ 3 feet of water during drought conditions, so the Raymondville Drain project will be able to control, store, conserve, develop, preserve, and distribute storm waters for purposes such as environmental mitigation and preservation.
During coordination with resource agencies this past year, the US Fish and Wildlife Service (USFWS) requested that water be diverted to La Sal Vieja Lake for the purposes of reducing the salinity of the lake and enhancing the environment of the wildlife. Coordination is also occurring with Delta Lake Irrigation District (DLID) who also owns a large portion of La Sal Vieja Lake; a study, at the request of DLID, is on-going to determine the impacts of diversion to La Sal Vieja Lake and any affects to the surrounding farm and ranch lands. Additionally, a study funded by the Texas Water Development Board (TWDB) actually supports the concept of water re-use within the HCDD NO. 1 system, and coordinating efforts have occurred with the TWDB regarding their Water Availability Model and the amount of water that would be allowed to be diverted for environmental mitigation and preservation effort as a retention and/or detention measure.

3. Protection and Provision for Economic Development. The Raymondville Drain project will allow for asset protection (estimated at approximately $40 billion in growth
taxable assets), as well as the continued and future economic development and growth along already-developed and potentially flood-prone areas in both Hidalgo and Willacy Counties. It should be further noted that the Raymondville Drain is being designed to minimize floodplain areas to allow for continued and future economic growth. Additionally, this protection of the area assets will mitigate possibilities for any potentially needed state disaster recovery funding because of damages from future storm and flood events.

The project is currently under final planning stage, anticipating environmental approvals towards the end of 2018. Some portions of the project have been constructed across US 281, and due to recent rain events, HCDD No. 1 has instructed the Engineers to expedite an interim design for construction of the portion of Raymondville Drain from Edinburg Lake to approximately ½ mile north (Segment 1), which will allow for more efficient drainage of the Faysville area in Hidalgo County. Final design of the majority of the Hidalgo County new channel portion is also on-going and anticipated to be completed by 2018. Other on-going activities include, but are not limited to resource agency/government entity coordination, geotechnical investigations, final analysis/ design of hydrology and hydraulics, structure design (bridges, culverts, control structures), utility coordination, as well as final right-of-way determination and acquisition.
Design for Segment 1 is 100% complete. Construction commenced by HCDD No. 1 construction crew in November 2017. HCDD No. 1 and Hidalgo County Precinct No. 4 is scheduled to perform all the construction efforts with in-house forces for Segment 1. We anticipate completing Segment 1 by the end of 2018.

Actual cost to date (010): December 31, 2017

Asset Acquisition: $ 5,518,883.00
Engineering: $ 2,381,944.00
Right-of-Way: $ 1 11,561.00
Construction: $ 620.70
Total: $ 8,013,008.70

Project Pictures