Yucca Pens Hydrogeologic Assessment Conducted for Charlotte Harbor - - PowerPoint PPT Presentation

Yucca Pens Hydrogeologic Assessment

Conducted for Charlotte Harbor National Estuary Program (CHNEP) and Florida Fish and Wildlife Conservation Commission (FWC) Conducted by Southwest Engineering & Design and Water Science Associates September 18, 2019

Projec ect Obj Objec ectives

• Install two water supply wells for prescribed burns
• Drill 30 borings to characterize sub-surface hydrogeologic conditions
• Install 14 monitoring wells with data loggers to ease burden on FWC

staff and to provide more detailed groundwater elevation data

• Survey 56 cross sections in flow-ways where LiDAR data is often

inaccurate

Water S Supply ly W Wells ells

• Prior prescribed burns were

managed with a water supply at FWC Babcock Webb field station east of I-75 (10 miles away)

• North Well installed at Yucca

Pens check station

• South well installed at North

Dead Hog Grade

• Production rate > 85 gpm

Well C Constructi tion

Borings gs

• Boring depths ranged from

30 to 100 feet

• Depth to confining layer

defined

• Shallow semi-confining layers

identified

• Gravel/rock zones identified
• Multiple confining layers

found at initial location of southern production well

• Alternative location ID’d for

southern production well

Mon

• nit

itorin ing W Well ells

• Monitoring wells located at

manual staff gaging locations established in 2011 by USGS

• Manual readings difficult due

to high water conditions

• Draining of groundwater

indicated from 2018 well near Gator Slough

• Purpose of southern wells is

to define the drainage effect

• f Gator Slough
• Southern locations have

wells that are 6’ and 30’ deep

Impact o

• f Gator

Slough o

• n Yucc

cca Pe Pens

6 7 8 9 10 11 12 13 14 4/30/18 5/20/18 6/9/18 6/29/18 7/19/18 8/8/18 8/28/18

ft-NAVD

Water Levels at Well 2, Yucca Pens Concrete Weir

Well Water Elev STA-4 Ground Water Elev at Weir Weir Invert

• 6
• 5
• 4
• 3
• 2
• 1

500 1000 1500 2000 2500 3000 3500 4000 4500 WT Relative Land Surface Distance, ft

Wet Season Depth to WT

Gator Slough Well 3 Wells will define this slope

Surveyed C Cross Sections

11.0 13.0 15.0 17.0 19.0 21.0 23.0 25.0 27.0 0.0 20.0 40.0 60.0 80.0 100.0 120.0 140.0 160.0 180.0 200.0

ft-NAVD Distance from Left Bank, ft

Cross Section 5

Surveyed C Cross Sections

Surveyed C Cross Sections

Surveyed C Cross Sections

Surveyed C Cross Sections

Surveyed C Cross Sections