Regional Service Through Unity… Meeting our Region’s Needs Today and Tomorrow

NTMWD BOARD MEETINGApril 23, 2020

Regional Service Through Unity… Meeting our Region’s Needs Today and Tomorrow

BOIS d’ARC LAKE UPDATENTMWD Board Meeting

April 23, 2020

Steve Long

Intake Tower

RWPS

Labyrinth Weir

Service Spillway

CLICK TO EDIT MASTER TITLE STYLEBOIS d’ARC LAKE UPDATE

Agenda• Covid-19 Impacts

• Steps Prior to Impounding Water

• Dam Schedule/Notch Closure

• Original schedule October 29, 2020 Impounded

• Archeology

• Construction Status• RES• CMAR 3• CMAR 4

BOIS D’ARC LAKE UPDATE

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Covid 19 Impacts

• Personnel – no impact

• Schedule Impacts• Mitigation monitoring moved to May 2020• Archeologists work 2 to a 1 meter block

• Equipment Delivery Impacts• TWPL Large diameter butterfly valves

CLICK TO EDIT MASTER TITLE STYLEBOIS D’ARC LAKE BOARD UPDATE

BOIS D’ARC LAKE UPDATE

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CMAR 1 Archer Western - Bois d’Arc Creek Notch Closure Status

• March 3 started Phase II

• Phase II - Closure at Bois d’Arc Creek • Removed care of water berms/excavating creek bed to reach good foundation

• March 20 cofferdam overtopped• 7-8 inches of rain 11 consecutive days of measurable rainfall

• March 27 – April 8 cofferdam rebuilt to 495• Recovery schedule submitted• Embankment is the critical path• AW (P&J) working double shifts starting April 20th• Expect double shifts to continue until end of summer 2020• AW (P&J) continuing to place concrete at Intake and Service Spillway

CLICK TO EDIT MASTER TITLE STYLEBOIS D’ARC LAKE BOARD UPDATEBois d’Arc Creek Notch April 12

https://youtu.be/kqGWFiEwZ4k

CLICK TO EDIT MASTER TITLE STYLEBOIS D’ARC LAKE EXECUTIVE COMMITTEEIntake Tower Debris Boom (off to the side)

CLICK TO EDIT MASTER TITLE STYLEBOIS D’ARC LAKE EXECUTIVE BRIEFINGService Spillway Chute Walls at Labyrinth

BOIS D’ARC LAKE UPDATE

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Archeology Mitigation

• Site 114 SOW submitted – 4/16/2020

• 25 archeologists working in the field

• Schedule Impacts• Site 118 – July 15, 2020• Site 120 – July 15, 2020 (1 remaining burial)• Site 178 – July 15, 2020 (1 remaining burial)• Site 244 – conditional scope of work approved• Site 151 – early start/conditional scope of work approved• Covid-19 impacts

– Archeologists work 2 to a 1 meter block– Equipment sharing

BOIS D’ARC LAKE UPDATE

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Mitigation Full Service Provider Status • Plantings• 9,937 acres restored/enhanced• 4,372 acres remaining to be planted (includes Upper Bois d’Arc

Creek)• 1,400,000 trees planted (600 trees/ac new; 200 trees/ac replant)• Total of 3,000,000 trees planted• 1,376 acres Upper Bois d’Arc Creek property purchased

• Cultural resources survey pending/ARC developing survey SOW

• Streams• 75,609 feet of streams restored• 48,629 feet of streams remaining • Hydrology restored to streams in the WRP

CLICK TO EDIT MASTER TITLE STYLEMITIGATION FSP RES – PLANTING AREAS

CLICK TO EDIT MASTER TITLE STYLEMITIGATION FSP RES – RESTORED STREAMS

BOIS D’ARC LAKE BOARD UPDATE

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CLICK TO EDIT MASTER TITLE STYLEBOIS d’ARC LAKE UPDATECMAR 3 – Water Tank, Reclaimed Basins, Filters, West Chem, Clearwell, & HSPS

CLICK TO EDIT MASTER TITLE STYLEBOIS d’ARC LAKE UPDATELeonard WTP High Service Pump Station

CLICK TO EDIT MASTER TITLE STYLEBOIS d’ARC LAKE UPDATELeonard WTP Clearwell

CLICK TO EDIT MASTER TITLE STYLEFM 897 BRIDGE – FINAL BEAM SET (300TH)

CLICK TO EDIT MASTER TITLE STYLEBOIS d’ARC LAKE UPDATECMAR 4 – Austin Bridge and Road (Site 2)

CLICK TO EDIT MASTER TITLE STYLEBOIS d’ARC LAKE UPDATECMAR 4 – Austin Bridge and Road (Site 3)

CLICK TO EDIT MASTER TITLE STYLEBOIS d’ARC LAKE CONSTRUCTION PHOTOSCMAR 4 – Austin Bridge and Road (Lake Operations Center)

Lake Operations Building & MaintenanceBuilding

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QUESTIONS?

BOIS d’ARC LAKE UPDATE