oak hill parkway water resources technical report · 2020-04-01 · the environmental review,...

The environmental review, consultation, and other actions required by applicable Federal environmental laws for

this project are being, or have been, carried-out by TxDOT pursuant to 23 U.S.C. 327 and a Memorandum of

Understanding dated December 16, 2014, and executed by FHWA and TxDOT.

Oak Hill Parkway Water Resources Technical Report

ADDENDUM #2

U.S. Highway 290 (US 290) / State Highway (SH) 71 West from State Loop 1 (Mopac)

to West of Ranch-to-Market (RM) 1826 and US 290 to Silvermine Drive

Travis County, Texas

CSJ # 0113-08-060 and 0700-03-077

November 2019

Water Resources Technical Report Addendum #2 Table of Contents

Oak Hill Parkway CSJs: 0113-08-060 & 0700-03-077 ii 2019

TABLE OF CONTENTS Introduction and Purpose ........................................................................................... 1

2019 Reevaluation #2 ..................................................................................... 1

Methods ....................................................................................................................... 1 Data Review ...................................................................................................... 2 Field Delineation ............................................................................................... 2

Results ......................................................................................................................... 3 Section 404 of the Clean Water Act ................................................................ 4

Summary of Impacts ............................................................................. 7 Floodplains ........................................................................................................ 7 Groundwater and Edwards Aquifer .................................................................. 8

Conclusions ................................................................................................................. 9

References ................................................................................................................ 10 TABLES Table 1: Evaluated Aquatic Features within the Project Area ..................................................... 5 ATTACHMENTS Attachment A Figures Attachment B Project Area Photographs Attachment C Wetland Determination Data Point Attachment D Hydraulic Exhibits FIGURES Figure 1. Project Location (Aerial Base) Figure 2a-b. Water Resources Figure 3a-l. Water Crossings

Water Resources Technical Report Addendum #2 Table of Contents

Oak Hill Parkway CSJs: 0113-08-060 & 0700-03-077 iii 2019

----This page intentionally left blank----

Water Resources Technical Report Addendum #2

Oak Hill Parkway CSJs: 0113-08-060 & 0700-03-077 1 2019

INTRODUCTION AND PURPOSE In December 2018, the Texas Department of Transportation (TxDOT) approved a Final Environmental Impact Statement (EIS) and Record of Decision (ROD) for mobility improvements to U.S. Highway (US) 290/State Highway (SH) 71 West from State Loop 1 (MoPac) to west of Ranch-to-Market Road (RM) 1826 and from US 290 to Silvermine Drive (Figure 1). The proposed project, known as the Oak Hill Parkway (OHP) Project, is located in Travis County, Texas, and is shown on the USGS 7.5’ quadrangle maps for Bee Cave, Oak Hill, and Signal Hill, Texas.

The proposed OHP Project and previous environmental analyses are described in detail in the Final EIS and ROD, and subsequent May 2019 Reevaluation (Reevaluation 1) (available online at https://www.oakhillparkway.com/environmental/).

2019 Reevaluation #2

As a result of project design changes following the 2018 Final EIS/ROD and Reevalutaion #1, TxDOT is conducting a second documented reevaluation to determine whether the previous environmental decision remains valid under circumstances listed in 43 TAC 2.85 and 23 CFR 771.129. A detailed list of design revisions is included in the Documented Reevaluation Checklist and displayed on the revised schematics (available for review at the TxDOT Austin District Office). This Water Resources Technical Addendum #2 has been prepared to document any change in resource impacts resulting from the 2019 Reevaluation #2 design modifications.

The purpose of this technical report is to identify and describe all water resources located within the proposed project area in order to assist in avoidance of impacts and minimization of effects as a result of the construction of the proposed project. Conclusions contained in this report are the opinion of the professionals conducting the study and are subject to confirmation by the appropriate regulatory agencies. In addition, this report covers regulatory issues related to water resources that are relevant to the requirements for a Documented Reevaluation Checklist for a TxDOT Project.

METHODS This Water Resources Technical Report Addendum #2 includes a summary of waters of the United States (WOUS), including wetlands, delineated within the project area by HDR, Inc. in March 2019, as well as a compilation of published data related to water quality, floodplains, and groundwater.



Data Review

Qualified wetland ecologists reviewed several published data resources prior to the field visit to identify potentially jurisdictional crossings, floodplains, impaired stream segments, and other sensitive surface and groundwater resources. Sources consulted included U.S. Fish and Wildlife Service National Wetlands Inventory (NWI) maps, the National Hydrography Dataset, the Natural Resources Conservation Service (NRCS) Soil Survey for Travis County, USGS 7.5-minute quadrangle sheets (Oak Hill, Signal Hill, and Bee Cave, Texas), Geologic Atlas of Texas maps (Austin sheet), Federal Emergency Management Agency (FEMA) floodplain maps, and recent and historic aerial photography.

Field Delineation

Qualified wetland ecologists conducted field investigations in March 2019 within the project area. No additional delineation was completed for Reevaluation #2. The routine method of wetland delineation outlined in the Field Guide for Wetland Delineation: 1987 Corps of Engineers Manual (WTI, 1991) and updated in the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Great Plains Region, Version 2.0 (USACE, 2010) was utilized for wetland determinations within the project area. Field activities focused on wetlands and WOUS and description.

The Corps of Engineers Wetlands Delineation Manual (Environmental Laboratory, 1987) defines wetlands based on three criteria: hydrophytic vegetation, hydric soils, and wetland hydrology. In general, all three criteria must be present for an area to qualify as a wetland. Some exceptions can occur in disturbed areas or in newly formed wetlands where one indicator (such as hydric soils) might be lacking. These areas would be dealt with on an individual basis as outlined in the Field Guide for Wetland Delineation (WTI, 1991) and the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Great Plains Region, Version 2.0 (USACE, 2010).

In addition to the jurisdictional wetlands defined above, the Clean Water Act (CWA) regulates impacts to other WOUS. The term “waters of the United States” has broad meaning and incorporates both deepwater aquatic habitats and special aquatic sites, including wetlands, as listed below:

• The territorial seas with respect to the discharge of fill material; • Coastal and inland waters, lakes, rivers, and streams that are navigable WOUS,

including their adjacent wetlands; • Tributaries to navigable WOUS, including adjacent wetlands; • Interstate waters and their tributaries, including adjacent wetlands;

For linear WOUS, the Ordinary High Water Mark (OHWM) was determined by assessing a combination of factors at each site. In accordance with Sec. 328.3(e) of the CWA and



Regulatory Guidance Letter 05-05 (USACE December 5, 2005), the following factors were considered in determining the jurisdictional boundary:

• Natural line impressed on the bank • Shelving • Changes in the character of soil • Destruction of terrestrial vegetation • Presence of litter and debris • Wracking • Vegetation matted down, bent, or absent • Sediment sorting • Leaf litter disturbed or washed away • Scour • Deposition • Multiple observed flow events • Bed and banks • Water staining • Change in plant community • Other appropriate means that consider the characteristics of the surrounding areas

Following the completion of preliminary data gathering and synthesis, the routine method of wetland determination was used to identify potentially jurisdictional areas within the project area. The crossings are listed in Table 1 below, and photographs of the project area are included in Attachment B of this report.

RESULTS The 2019 Reevaluation #2 proposed design revisions would not result in a change to the findings described in the Final EIS/ROD or Reevaluation #1 for the regulations listed below. Each regulation was addressed in detail during the water resources analysis conducted for the Final EIS/ROD.

• Section 401 of the CWA • Section 402 of the CWA • Section 402: Texas Pollutant Discharge Elimination System • Section 402: Municipal Separate Storm Sewer System • Water Quality Section 303(d) of the CWA • Executive Order 11990, Wetlands • General Bridge Act and Section 9 of the Rivers and Harbors Act • Section 10 of the Rivers and Harbors Act • Texas Coastal Management Program



• Coastal Barrier Resources Act • Trinity River Corridor Development Certificate • International Boundary and Water Commission • Wild and Scenic Rivers • Water wells with 500 feet of the project area • Executive Order 11988– Floodplain Management

Additionally, the underlying hydrology of the project area has not changed since the environmental clearance of Reevaluation #1.

Section 404 of the Clean Water Act

Wetland ecologists initially conducted field investigations for aquatic features in 2015. The results of that effort were presented in the 2018 Final EIS/ROD. In March 2019, the project team acquired additional right-of-entry agreements, which allowed for additional site visits and delineation of the proposed detention pond locations. Based on the designs of the 2019 Reevaluation #2, five of those aquatic features are no longer in the project area. As a result, a total of 13 aquatic features have been delineated and remain within the project area. Aquatic features identified within the project area include three classifications: intermittent streams, ephemeral streams, and an emergent wetland (Table 1, Figure 2a-b, Figure 3a-l, and Attachment C).

The acreage of impacts of each potentially jurisdictional water body within the existing and proposed right-of-way, along with the total project area acreages, are shown in Table 1 below. Field data sheets are included in Attachment C for the wetland location.



Table 1– Evaluated Aquatic Features within the OHP Corridor

Aquatic Resource ID Description

Approx. OHWM (feet)

Acreage/Linear Feet within the Project

Area

Acreage/Linear Feet of Potential

Impacts

Potential Permitting Requirements

Wetland 1 Emergent Wetland NA 0.0322/NA 0.0075/NA NWP 14 with a PCN

Wetland 2* Emergent Wetland adjacent to S-11 NA -- -- --

S-1 Ephemeral Stream to Scenic Brook Tributary- Unnamed Tributary 3 0.0026/37 0.0019/28 NWP 14

S-2 Ephemeral Stream – Unnamed Tributary to Wheeler Branch 2 0.0350/760 0.0195/426 NWP 14 with a PCN

S-3 Ephemeral Stream - Wheeler Branch 11 0.4258/1770 0.4258/1770 NWP 14 with a PCN

S-4 Ephemeral Stream - Scenic Brook Tributary to Williamson Creek 19 0.0865/202 0.0820/195 NWP 14

S-5 Intermittent Stream, perennial pools - Headwaters of Williamson Creek at SH 71 bridge 6 0.0389/264 0.0/0.0 --

S-6 Intermittent Stream - Williamson Creek 15 1.6406/4723 0.0244/12 NWP 14

S-7 Ephemeral Stream - Unnamed Tributary to Williamson Creek 5 0.0294/255 0.0123/171 NWP 14

S-8 Ephemeral Stream - Unnamed Tributary to Williamson Creek 4 0.0066/71 0.0/0.0 --

S-9 Ephemeral Stream - Unnamed Tributary to Williamson Creek 4 0.0093/103 0.0/0.0 --

S-10* Ephemeral Stream - Unnamed Tributary to Williamson Creek 2 -- -- --

S-11* Intermittent Stream - Unnamed Tributary to Williamson Creek (SH 71 detention pond) 10 -- -- --

S-12 Ephemeral Stream – Braided channel along Unnamed Tributary to Williamson Creek (Bee Cave detention pond)

8 0.3132/1670 0.0104/75 NWP 14

S-13 Ephemeral Stream - Unnamed Tributary to Williamson Creek (Bee Cave detention pond) 4 0.0245/266 0.0/0.0 --

S-14 Ephemeral Stream – Devil’s Pen Creek 14 0.1935/160 0.0/0.0 --



Aquatic Resource ID Description

Approx. OHWM (feet)

Acreage/Linear Feet within the Project

Area

Acreage/Linear Feet of Potential

Impacts

Potential Permitting Requirements

Open Water 1*

Excavated Pond on channel of S-11 NA -- -- --

Open Water 2*

Excavated Pond on channel of S-11 NA -- -- --

Total Within the Project Area

2.83/ 10,280 0.58 / 2,677

Project Team, 2019

*These crossings were identified within the survey area in 2019 but have been determined not to lie within the Reevaluation #2 project limits.

Note: The impact calculations are based on the schematic design and are not based on actual limits of construction, as this level of detail is not available at this point in project

development. Therefore, the calculations are an estimated value that assume complete loss for waters that occur within or beneath at-grade improvements. The calculations have

not accounted for the removal of waters contained within existing culverts, as this information was not available at the time of report production.



Summary of Impacts

The project area contains 12 potentially jurisdictional streams and one potentially jurisdictional wetland. Of the delineated streams and wetland, 8 features would be impacted by the proposed project. The impacts to these waters would occur from extending existing culverts, placing fill for concrete aprons and/or rock rip rap at bridges, and placing temporary fills during construction. Exact fill types and amounts would be determined once design is finalized, but impacts are anticipated to be permitted with a Nationwide Permit (NWP) 14 with Pre-construction Notification (PCN) for linear transportation projects from US Army Corps of Engineers. It is likely that a PCN would be required due to impacts associated with the wetland and impacts exceeding 0.1 acres or 300 linear feet at individual crossings. Preliminary design indicates that many of the stream crossings would be bridged, which would minimize or avoid potential fill impacts at these locations.

Floodplains

New rainfall data, referred to as Atlas 14, was released by the National Oceanic and Atmospheric Administration (NOAA) in September 2018. Atlas 14 rainfall data, with increased rainfall values, has been incorporated in to the OHP hydrologic and hydraulic analysis (provided under separate cover). A result of incorporating the Atlas 14 data is the removal of one of the two originally proposed upstream detention ponds, the SH 71 pond, from the project design. The new data has also resulted in changes of elevations of several roadway locations at intersections with creeks.

The SH 71 pond was removed from the project design because, after incorporating the Atlas 14 rainfall data, the pond resulted in additional flooding (compared to existing) along Williamson Creek downstream of the pond and upstream of the SH 71 crossing, through a heavily-developed area of the creek. This additional flooding, not present in the pre-Atlas 14 modeling, is the result of additional peak flows and a change in peak flow timing between the outfalls of the SH 71 pond and an existing nearby City of Austin detention pond. The flows of this existing pond meet the flows of the SH 71 pond approximately 1,000’ downstream of the two ponds pond. The SH 71 pond delayed the peak flows leaving the pond by 6 minutes, compared to the existing conditions. This subtle shift caused the peak flows from the SH 71 pond to coincide with the peak flows form the existing City of Austin pond, resulting in an overall increase in peak flows at the confluence of the two ponds. This increase in peak flows resulted in the additional flooding downstream of the ponds and upstream of the SH 71 crossing.

Multiple options, including outfall and dam reconfiguration to both the SH 71 pond and the existing City of Austin pond, were considered to address the additional flooding in the Atlas-14 modeling. The only option that addressed the additional flooding without causing flood impacts in other areas was the removal of the SH 71 pond. The reductions in peak flows



(compared to existing) through the project area, while still substantial, are less when the SH 71 pond is removed. Proposed bridges and channels were modified to account for this increase in peak flows without creating impacts to off-site properties. Additionally, a reduction in potential impacts to jurisdictional waters and wetlands (S-11, Wetland 2, and Open Waters 1 and 2) was an added benefit to the removal of the SH 71 pond.

The Atlas 14 modeling indicates two areas of increased 100-year water surface elevations (compared to existing) outside the project right-of-way, which were not addressed in the Final EIS/ROD or Reevaluation #1. These two areas are labeled as “Area of Potential Flood Impact” in Attachment D. There are no other areas of increased 100-year water surface elevations outside the project right-of-way indicated by the modeling of the Atlas 14 data.

Groundwater and Edwards Aquifer

The Safe Drinking Water Act, the Edwards Aquifer Rules (30 TAC 213), and the TxDOT and Texas Commission on Environmental Quality (TCEQ) Memorandum of Understanding (MOU) regulate project activities that have a potential to affect the Edwards Aquifer. The Final EIS/ROD and supporting material provided an in-depth analysis of the OHP project’s effects to groundwater and the Edwards Aquifer. No change to the baseline conditions for these resources have occurred as a result of the 2019 design revisions. A summary of these topics is included below.

The Edwards Aquifer includes three primary zones: the Contributing Zone, the Recharge Zone, and the Transition/Artesian Zone. The OHP Project crosses the Recharge and Contributing Zones. Within the project area, the Contributing Zone is located approximately 800 feet west of the intersection of US 290 and William Cannon Drive and the Recharge Zone is located to the east of the intersection of US 290 and William Cannon Drive (see Figure 3). As required by the TxDOT-TCEQ MOU, TxDOT completed coordination with the TCEQ for the OHP Project in May 2018. The TCEQ did not provide comments on the project or the EIS document. TxDOT has committed to a number of best management practices (BMPs) to protect water quality within the project area and a revised Preliminary Water Quality Analysis & Design Report has been prepared to address the water quality commitments, including TSS reductions resulting from the design modifications (KFA, 2019). Additionally, TxDOT and TCEQ met on July 31, 2019 to discuss permitting the OHP Project (KFA, 2019). At the meeting, it was agreed that a phased permitting approach would be acceptable; due to the fact that the project is located over both the Contributing Zone and the Recharge Zone, different phases will require a different Edwards Aquifer Protection Plans, either a Contributing Zone Plan or Water Pollution Abatement Plan. The revised commitments for obtaining compliance with the Edwards Aquifer Rules are included in the Preliminary Water Quality Analysis & Design Report, which is available for review at the TxDOT Austin District.



CONCLUSIONS This Water Resources Technical Addendum #2 has been prepared to document new ecological impacts resulting from the 2019 Reevaluation #2 design changes. The results of the additional analysis are summarized below:

• No additional water features were identified in the 2019 Reevaluation #2. Five water features were determined to no longer lie within the proposed project area.

• It is anticipated that a NWP 14 with PCN would be required for impacts at eight crossings.

No additional water resource commitments would be required in order to achieve NEPA clearance on the 2019 Reevaluation #2.



REFERENCES Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual, U.S.

Army Engineers Waterways Experiment Station, Vicksburg, MS. NTIS No. AD A176912.

K. Friese & Associates (KFA). 2019. Preliminary Water Quality Analysis & Design Report. Prepared for the Texas Department of Transportation. November 2019.

U.S. Army Corps of Engineers. (USACE). 2010. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Great Plains Region (Version 2.0), ed. J. S. Wakeley, R. W. Lichvar, and C. V. Noble. ERDC/EL TR-10-20. Vicksburg, MS: U.S. Army Engineer Research and Development Center.

U.S. Fish and Wildlife Service. (USFWS). 2018. National Wetlands Inventory Mapper. Available at: https://www.fws.gov/wetlands/data/mapper.html. Accessed December 2018.

U.S. Geological Survey. (USGS) 2019. USGS National Map Viewer. https://viewer.nationalmap.gov/advanced-viewer/#. Accessed November 18, 2019.

Wetland Training Institute, Inc. (WTI). 1991. Field Guide for Wetland Delineation: 1987 Corps of Engineers Manual. WTI 91-2. 133 pp.

https://www.fws.gov/wetlands/data/mapper.html.%20Accessed%20December%202018

https://www.fws.gov/wetlands/data/mapper.html.%20Accessed%20December%202018

https://viewer.nationalmap.gov/advanced-viewer/


Oak Hill Parkway CSJs: 0113-08-060 & 0700-03-077 2019

Attachment A: Figures

Project BeginProject EndProject End

Detention Pond

Hays Count y

Ernest Ro b lesW

ay

Latta

Republi c

Of Texas Blvd

Tra vis CountyC

ir

Brod

i eLn

SW Parkway

CR 400CR 399

CR 19

18CR 2876

CR 397

CR 1928

CR472

CR 1923

CR 460

CR 1602

CR 443

CR 474

C R402

CR4 04

CR 385

CR47

8

CR 424

CR 16

26

CR 19

86

CR 19

96

CR 40 6

CR48

1

C R2872

CR 1956

CR 1994

CR 1957

CR 1649

CR 1 953

CR 1920

CR428

CR

374

CR 1621

CR4 25

CR2 7 9

CR 1967

CR 1915

CR407

CR 396

CR

405

S Bay

Tule Cv

Myra Ct

Adel C

v

Batak Ln

Via DrEc

l ipse

Ln

Woo d Trl

Ame s Ln

O the l lo Cv

S Oak Blvd

Kenn

anRd

Ax is Dr

Eiger Rd

Nava r r o P l

Neide

r Dr

Nub ia

n Ln

Mc Dade Dr

Nusse

rLn

Blumie St

Headl y Dr

Hero

Dr

Ast o ri aDr

Egan

hill D

r

Holl isterDr

Anchu sa Tr l

Siri ngoPass

Lant

ana W

ay

Sur reyHi l l Dr

LostVa lle y

Rotan Dr

A via

ra Dr

Via VerdeDr

Kiva Dr

Westview Rd

Ad enLn

La n dsman Dr

ClarnoDr

Brush

Cou n

tryRd

Esta na

Ln

Hope landDr

Westc r e e k Dr

Ma e linDr

Esc arpm

e ntB

lvd

Wier H

ills R

d

SB ro ok D r

Ganttcre st

Dr

Pillo

w Rd

Nair n Dr

Oakd a le Dr

DoswellLn

Woo

dcreek Rd

Pa isanoTrl

Parkw oo

d Dr

La Cre s a daD r

FairV all e y Tr

l

Gorha

m Gle n LnE spina Dr

Doe M eadowDr

Colb

ergDr

Bucke

yeTrl

So

terPkwy

Oa

si sD r

Re d m on d

Rd

Tw il i g ht M e sa Dr

Blar

wood

D r

Lone

Oak

Trl

Wag o n Train

RdLove g ras sLn

Harp er s Ferry Ln

Ve ga Av

e

Vi a Corre t o Dr

S

Ba y L n

E ske w Dr

Sta g ge rbrus h Rd

P on c haPa ss

Ma

g e ntaLn

Ale xa nd r iaDr

Trail We s tDr

RedWillow Dr

Cove

red Brid

ge

Dr

Ridge O a k Rd

BackBayLn

Ya upon Va l l e y Rd

Mit r aDr

Copano Dr

Terravis t a Dr

Rial to Blvd

La

Crosse Ave

!#2244

!#1826

Cima Cir

Kali Cv

Easy Dr

Sharl Cv

Kings Row

KayLn

Port Roya l

Ston

e Rd

Crest View Rd

Al len

Weir Dr

Furlo ngDr

Foste

r Ran

ch Rd

Cy pres s

W Pt

Bay Hil l Dr

Hone ycomb Dr

Blue Hill Dr

TaraLn

Le wis M ounta in Rd

Claxton

You ngLn

Gallan t Fox

S a n Diego

R d

Zyle Rd

Bl azyk Dr

Sout hview Rd

Mowink

le Dr

Bar to

n PtCanyo n R im Dr

Gran

ada

Hill s

Dr

Thunderb i rd RdW

hiteM

arsh

Va l ley Wal k

Patt e r son RdScenic Bluff Dr

Circle Dr

E l Do rad o

Creeks Edge

El Re y Blvd

Southw est Pkwy

B arton

Cre ek Bl vd

ST45

ST360

ST71

ST1

£¤290

Hays County

Travis County

G:\Projects\TXDOT\US290\all_PROD_Figure 1_ProjectLocation_Aerial_20191115.mxd

IProject LocationFigure 1. Project Location (Aerial Base)

Basemap Source: Google (2018)

1 in = 1 mileScale: 1:63,360Date: 11/15/2019

Prepared for: TxDOT

CSJ: 0113-08-060 and 0700-03-077Oak Hill Parkway: US 290W from Mopac/Loop1 to westof Circle Drive and SH 71 from US 290W to Silvermine Drive

ST1

ST45£¤290

§̈¦35

Wells BranchWells Branch

AustinAustin

ProjectArea

Travis County

0 1.5 Kilometers

0 1 Mile

#*#*

#*

#*

#*

#*

!(

!(

!( !(!(

S-10*S-9

S-8S-7

S-6

B arto

n Cr e

ek

Williamson Creek

Lat ta

Beck

ett R

d

Brod

ieLn

Jones Rd

Er n e st Robl e s Way

Brod

ie Ln

Mccarty Ln

Monte rrey Oaks Blvd

TravisCountyCi r

Republic

OfTe

xas Blvd

SW Parkway

WW

ill iamCa nnon Dr

CR 1602

Myra Ct

Bent Oak Cir

Terra

Oak

Cir

E Oa k Blvd

Spiv ey Dr

Faw nRun

Wing Rd

Barton View Dr

Robert Dixon Dr

Kno b Oak Ln

Su nk i st Ln

Cliff

stone

Cv

Woo

dside D r

WOa

k Blvd

VolW

a lke

r Dr

Eiger

Rd

Dry O a k Tr l

Dudle

y Dr

Can a Cv

La ng try Ln

School Rd

Wolf Ru n

V a lia n t Cir

Dry We

l l s Rd

Allegro Lugar

Vai l Va l leyDr

Kiva

Dr

Chuc k Wa g o n Trl

Wes

ternO

a ks B

lv d

SteerTr l

Fenc

eLin

eDr

Se nde r oDrH e ro D r

Honey D ew Ter

Twi ste d

Tre e

Dr

GainesRanchLoop

Boston Ln

OneOa k

Rd

Pono

maTr

l

Concho CreekBnd

Po rsche Ln

Whee le rBran ch Trl

Yellow T a il Cv

Canyonw ood Dr

Smith

Oak T

rl

F oster Ra

nch Rd

Eagl e Fea th e r Dr

Mor n

ing

De

w Dr

Ka yv iew D r

Westview RdReynolds Rd

Brus

h Coun tr

y Rd

Stea

rns Ln

Ye llow Rose Trl

Westc

reek

Dr

Rees

eDr

Oakc

laire

Dr

Oakdale Dr

S ummerse t Trl

Ben Garza Ln

Woodcreek Rd

Park

wood

Dr

Fair Va l l ey Trl

Rialto Blvd

Lone

Oak

Trl

Pillo

w Rd

TrailCrest Cir

W a gon

Train

Rd

L o v egrass L n

Vega

Ave

Ridge Oa k Rd

Staggerbrush Rd

T ra i l WestDr

ST360

ST1

LakeAustin-Town

Lake

WilliamsonCreek-Onion

Creek

£¤290

G:\Projects\TXDOT\US290\Water_PROD2_Figure 2_Water Resources_20191120.mxd

I

Project LocationHUC 12 Watershed BoundaryNHD StreamNHD WaterNWI Wetland100-Year Flood ZoneDesignated Floodway

!( Water Resource#* Water Well within 500 feet

Figure 2a. Water ResourcesData Sources: NHD (2018), NWI (2018),

FEMA NFHL (2018), TWDB (2019), HDR (2019)Aerial Source: Google (2018)

1 in = 2,000 feetScale: 1:24,000Date: 11/20/2019

Prepared for: TxDOT

CSJ: 0113-08-060 and 0700-03-077Oak Hill Parkway: US 290W from Mopac/Loop 1 to westof Circle Drive and SH 71 from US 290W to Silvermine Drive

0 600 Meters

0 2,000 Feet

b a

*Resource no longer located within the Project Location

#*

#*

#*

#*

#*

#*

#*#*

!(

!(

!(

!(

!(

!(

!(

!(

!(

!( !(

!(

!(

!(

!( !(!(

Devils Pen Creek

Wheeler Branch

Scenic Brook Tributary

Detention Pond

Wetland 1

Open Water 1*

S-14

S-3

S-4S-9

S-8S-7

S-6

S-5

S-2

S-13

S-12

S-11*

S-1

Wetland 2*Open Water 2*

Williamson Creek

Fletch

er

Silve

rmin

e

WW

i ll ia mCa nnon Dr

S ce nic Brook

Old Bee Caves

CR 19

85

CR19

25

CR 1923

CR 1984

CR6 5

4

CR19

70

CR 2259

CR 1973

CR 19

80CR

1982

CR 1948

CR 22

57

CR 19

49

CR19

67

CR19

81

CR19

50

CR 19

58

CR

1959

CR 2016

CR 1915

Keli CtNandas Trl

Otek

a CvOthe l l o C v

Pi nt o

Path

BlueStem

Trl

Con i fer Cv

Tusm

an Dr

Rac coon

Run

Anchusa Trl

B i g H orn

Cir

Roan Ln

Ga lla tin Dr

C e darElm Trl

Menle r Dr

Grov

eCr e st Dr

Aviar

a Dr

Hanbridge Ln

L a ndsma n Dr

Fenton Dr

Smok

eyHi

llRd

Cal lbr

amLn

Roar

ingS pr i n g s D

r

Oa k

Me adow Dr

Fort B

e nton

Dr

Wier H

ills R

d

S Brook Dr

Chino

ok D

r

LaCo

ncha P ass

C o b bl esto

n eTw i l ight Mesa Dr

Wolfc r eek Pas

s

Jou r n eyvil l e Dr

Ponc ha Pa ss

Red W

illow D

r

Cove

red

B ridge

Dr

Rialto Blvd

Terr a

v ista

Dr

!#1826

Felts

Ln

Cima Cir

Towan

a Cv

Scarle

t Cir

Butler C

v

Kathleen Dr

S Bend

Ross

on D

r

Summ e r Sky Dr

Deer

have

n Rd

San Di e go Rd

Crest View Rd

Grana

daHi

lls Dr

LaFa

una Pa

th

Weir Dr

Espanola Trl

La u ra la n Dr

WVi

ewR d

Brigh

t Star

Dr

Dore l la Ln

Midw

ood

Pkw y

Sam Carte r Dr

Towana Trl

Tara

Ln

Claxton

Cand

elaria

Dr

Murm uring Cre ek

William

son

Cree

k

ElRe y Bl

vd

Southv iew Rd

Pi tte r

Pat L

n

Mowink

le Dr

Thunderbird RdCirc le Dr

ST71Little Barton

Creek-Barton Creek

LakeAustin-Town

Lake

SlaughterCreek-Onion

Creek

WilliamsonCreek-Onion

Creek

£¤290

G:\Projects\TXDOT\US290\Water_PROD2_Figure 2_Water Resources_20191120.mxd

I

Project LocationHUC 12 Watershed BoundaryNHD StreamNHD WaterNWI Wetland100-Year Flood ZoneDesignated Floodway

!( Water Resource#* Water Well within 500 feet

Figure 2b. Water ResourcesData Sources: NHD (2018), NWI (2018),

FEMA NFHL (2018), TWDB (2019), HDR (2019)Aerial Source: Google (2018)

1 in = 2,000 feetScale: 1:24,000Date: 11/20/2019

Prepared for: TxDOT


0 600 Meters

0 2,000 Feet

b a

*Resource no longer located within the Project Location

0.024 acre

Williamson Creek

Ridge Oak

Rd

Joe

Tann

er L

n

Patto

n Ra

nch

Rd

Mccarty Ln

£¤290

S-10

S-6

G:\Projects\TXDOT\US290\Water_PROD2_Figure 3_Water Crossings_20191120.mxd

I

Existing Right-of-WayProposed Right-of-WayProposed Driveway LicenseDelineated Water of the U.S.Water/Wetland Impact

Figure 3a. Water Crossings

Data Sources: HDR (2019)Aerial Source: Google (2018)

1 in = 200 feetScale: 1:2,400Date: 11/20/2019

Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f

0.024 acre

Williamson Creek

WWi ll i

amCa nnon Dr

£¤290

S-10

S-6

S-6

S-9


I


Figure 3b. Water Crossings



Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f

0.012 acre0.012 acre

Williamson Creek

W olfcreek Pass

£¤290

S-6

S-7S-8


I


Figure 3c. Water Crossings



Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f

Williamson Creek

Hi l l Oaks Dr

Old Bee Caves

£¤290

S-6


I

Existing Right-of-WayProposed Right-of-WayProposed Driveway LicenseDelineated Water of the U.S.

Figure 3d. Water Crossings



Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f

Scenic Brook Tributary

0.082 acre

Williamson Creek

Oak Meadow Dr

ST71

£¤290

S-4


I


Figure 3e. Water Crossings



Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f

Wheeler Branch

0.426 acre£¤290

S-3


I


Figure 3f. Water Crossings



Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f

Wheeler Branch

0.426 acre

!#1826

Hudson Loop

£¤290 S-3


I


Figure 3g. Water Crossings



Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f

0.02 acreCandelaria Dr

Acton Dr

La To

sca D

r

ElRey

Blvd

Ross

on D

r

Phoenix Pa ss

Hudson Loop

£¤290

S-2


I


Figure 3h. Water Crossings



Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f

0.002 acre

0.007 acre

Cooper Pass

El Rey

Blvd

Haske ll Dr

Bol ing

Cande l a ria Dr

£¤290

S-1

Wetland 1


I

Existing Right-of-WayProposed Right-of-WayProposed Driveway LicenseDelineated Water of the U.S.Delineated WetlandWater/Wetland Impact

Figure 3i. Water Crossings



Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f

Devils Pen Creek

Ta ra Ln

£¤290S-14


I

Existing Right-of-WayProposed Right-of-WayDelineated Water of the U.S.

Figure 3j. Water Crossings



Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f

Williamson Creek

Old Bee Caves

Chinook Dr

ST71S-5


I

Existing Right-of-WayProposed Right-of-WayProposed Driveway LicenseDelineated Water of the U.S.

Figure 3k. Water Crossings



Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f

Detention Pond

0.010 acre

Mountain Crest Dr

Sunse t Rdg

Old Bee Caves

S-12S-13


I

Proposed Right-of-WayProposed Permanent EasementDelineated Water of the U.S.Water/Wetland Impact

Figure 3l. Water Crossings



Prepared for: TxDOT


0 60 Meters

0 200 Feet

lk

e d c b aj i h g f



Attachment B: Project Area Photographs

Water Resources Technical Report – Addendum

Oak Hill Parkway CSJs: 0113‐08‐060 & 0700‐03‐077 2019

Photograph 1: Commercial land use along SH 71 south of Williamson Creek crossing; facing south.

Photograph 2: Urban land use and commercial properties along US 290; facing east.



Photograph 3: Disturbed oak‐juniper vegetation along US 290 (foreground) and residential development

in background; facing southeast.

Photograph 4: Project eastern terminus at Mopac; facing east.



Photograph 5: Oak‐juniper woodland and native‐invasive vegetation along US 290; facing west.

Photograph 6: Urban low intensity along US 290 adjacent to roadway and disturbed oak‐juniper

vegetation adjacent to the fenceline; facing east.



Photograph 7: Live Oak grove at Circle Drive and US 290; facing northeast

Photograph 8: Woodland vegetation type along US 290; facing north.



Photograph 9: Riparian vegetation at SH 71 Williamson Creek crossing (S‐5); facing southeast.

Photograph 10: Riparian vegetation along Williamson Creek (S‐6) at Joe Tanner; facing northwest

towards US 290/SH71.



Photograph 11: Riparian vegetation along Williamson Creek (S‐6) at Old Bee Caves Road; facing east.

Photograph 12: Limestone outcrop along US 290; facing west.


2019

Photograph 13: Urban Low Intensity vegetation and limestone cliff at the start of Recharge Zone along

US290/SH71 at William Cannon; facing east.

Photograph 14: Utility infrastructure within the Bee Cave detention pond; facing west.

Oak Hill Parkway CSJs: 0113‐08‐060 & 0700‐03‐077



Photograph 15: Vegetated woodland within the Bee Cave detention pond; facing west.

Photograph 16: S‐1; facing north.


2019

Photograph 17: S‐2; facing north.

Photograph 18: Wheeler Branch (S‐3) south of 290; facing north.



2019

Photograph 19: Wheeler Branch (S‐3) north of US 290; facing south.

Photograph 20: Scenic Brook Tributary (S‐4) from south of SH 71; facing north.




Photograph 21: S‐5 under SH 71 looking west

Photograph 22: S‐5 looking east



Photograph 23: Along Williamson Creek (S‐6) north of US 290/SH 71; facing east.

Photograph 24: Williamson Creek (S‐6) west of low water crossing at Old Bee Caves Road; facing east.



Photograph 25: Perennial pool areas along S‐6, Williamson Creek east of William Cannon; viewing east.

Photograph 26: Perennial pool areas along S‐6, Williamson Creek, east of William Cannon; viewing east.


2019

Photograph 27: Williamson Creek (S‐6) upstream of US 290/SH 71 crossing; facing south.

Photograph 28: Downstream of US 290/SH 71 crossing of Williamson Creek (S‐6); facing south.




Photograph 29: Williamson Creek (S‐6) at William Cannon Road crossing; facing east.

Photograph 30: Unnamed tributary to Williamson Creek (S‐7) south of US 290/SH 71; facing east.



Photograph 31: Unnamed tributary to Williamson Creek (S‐8) north of US 290/SH 71; facing south.

Photograph 32: S‐10, dry creek bed (no longer in the project area); facing north.



Photograph 33: Unnamed tributary to Williamson Creek (S‐11) (no longer in the project area) within SH

71 detention pond site; facing south.

Photograph 34: Unnamed tributary to Williamson Creek (S‐11) (no longer in the project area) within SH

71 detention pond site; facing north.



Photograph 35: Unnamed tributary to Williamson Creek (S‐12) within the Bee Cave detention pond site;

facing northwest.

Photograph 36: Unnamed tributary to Williamson Creek (S‐12) within Bee Cave detention pond site;

facing south.



Photograph 37: Devil’s Pen Creek (S‐14) at the US 290 crossing at the western project terminus; facing

north.

Photograph 38: Excavated on‐channel stock pond (Open Water 1) (no longer in the project area) located

within SH 71 detention pond; facing north.



Photograph 39: Excavated on‐channel stock pond (Open Water 2) (no longer in the project area) within

SH 71 detention pond; facing southwest.

Photograph 40: Wetland (Wetland 1) near Boling Drive, within the project area; facing south.



Photograph 41: Wetland (Wetland 2) (no longer in the project area) within the SH 71 detention pond;

facing south.



Attachment C: Wetland Determination Point

US Army Corps of Engineers Great Plains – Version 2.0

WETLAND DETERMINATION DATA FORM – Great Plains Region

Project/Site: City/County: Sampling Date:

Applicant/Owner: State: Sampling Point:

Investigator(s): Section, Township, Range:

Landform (hillslope, terrace, etc.): Local relief (concave, convex, none): Slope (%):

Subregion (LRR): Lat: Long: Datum:

Soil Map Unit Name: NWI classification:

Are climatic / hydrologic conditions on the site typical for this time of year? Yes No (If no, explain in Remarks.)

Are Vegetation , Soil , or Hydrology significantly disturbed? Are “Normal Circumstances” present? Yes No

Are Vegetation , Soil , or Hydrology naturally problematic? (If needed, explain any answers in Remarks.)

SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc.

Hydrophytic Vegetation Present? Yes NoHydric Soil Present? Yes NoWetland Hydrology Present? Yes No

Is the Sampled Area within a Wetland? Yes No

Remarks:

VEGETATION – Use scientific names of plants. Dominance Test worksheet: Number of Dominant Species That Are OBL, FACW, or FAC (excluding FAC ): (A)

Total Number of Dominant Species Across All Strata: (B)

Percent of Dominant Species That Are OBL, FACW, or FAC: (A/B)

Prevalence Index worksheet: Total % Cover of: Multiply by: OBL species x 1 = FACW species x 2 = FAC species x 3 = FACU species x 4 = UPL species x 5 = Column Totals: (A) (B)

Prevalence Index = B/A = Hydrophytic Vegetation Indicators: 1 - Rapid Test for Hydrophytic Vegetation 2 - Dominance Test is >50%

3 - Prevalence Index is 3.01 4 - Morphological Adaptations1 (Provide supporting

data in Remarks or on a separate sheet) Problematic Hydrophytic Vegetation1 (Explain)

1Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic.

Absolute Dominant Indicator Tree Stratum (Plot size: ) % Cover Species? Status 1. 2.3.4.

= Total Cover Sapling/Shrub Stratum (Plot size: ) 1. 2. 3. 4. 5.

= Total Cover Herb Stratum (Plot size: ) 1. 2. 3. 4. 5.6.7.8.9.10.

= Total Cover Woody Vine Stratum (Plot size: ) 1. 2.

= Total Cover % Bare Ground in Herb Stratum

Hydrophytic Vegetation Present? Yes No

Remarks:

290/71 Oakhill Parkway Travis 7/20/2015

TxDOT Tx W-1

C. Magers, S. Moren N/A

- concave 5

I (Southwest Plateaus) 30.231008 -97.899092 NAD 83

Brackett-Rock outcrop complex, 1 to 12 percent slopes n/a

✔

✔

✔

✔ ✔✔

Appears to be a dry pond that was dug in uplands during construction of roadway with a cut into anexisting stream.

30'

none4

7

-15'

Baccharis halimifolia 5 yes57%

FACSalix nigra 5 yes FACWSapium sebiferum 5 yes FACJuniperus ashei 5 yes NIMelia azedarach 5 yes FACU

255'

OBL30Polygonum hydropiperoides yesMuhlenbergia reverchonii 15 no FACTypha latifolia 5 no OBLYucca rupicola 5 no NI

✔

5530'

Lonicera japonica FACU20 yes

2045

✔

US Army Corps of Engineers Great Plains – Version 2.0

SOIL Sampling Point:

Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks

1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3:

Histosol (A1) Sandy Gleyed Matrix (S4) 1 cm Muck (A9) (LRR I, J) Histic Epipedon (A2) Sandy Redox (S5) Coast Prairie Redox (A16) (LRR F, G, H) Black Histic (A3) Stripped Matrix (S6) Dark Surface (S7) (LRR G) Hydrogen Sulfide (A4) Loamy Mucky Mineral (F1) High Plains Depressions (F16) Stratified Layers (A5) (LRR F) Loamy Gleyed Matrix (F2) (LRR H outside of MLRA 72 & 73) 1 cm Muck (A9) (LRR F, G, H) Depleted Matrix (F3) Reduced Vertic (F18) Depleted Below Dark Surface (A11) Redox Dark Surface (F6) Red Parent Material (TF2) Thick Dark Surface (A12) Depleted Dark Surface (F7) Very Shallow Dark Surface (TF12) Sandy Mucky Mineral (S1) Redox Depressions (F8) Other (Explain in Remarks) 2.5 cm Mucky Peat or Peat (S2) (LRR G, H) High Plains Depressions (F16) 3Indicators of hydrophytic vegetation and 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) wetland hydrology must be present,

unless disturbed or problematic. Restrictive Layer (if present): Type: Depth (inches): Hydric Soil Present? Yes No Remarks:

HYDROLOGY Wetland Hydrology Indicators: Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (minimum of two required)

Surface Water (A1) Salt Crust (B11) Surface Soil Cracks (B6) High Water Table (A2) Aquatic Invertebrates (B13) Sparsely Vegetated Concave Surface (B8) Saturation (A3) Hydrogen Sulfide Odor (C1) Drainage Patterns (B10) Water Marks (B1) Dry-Season Water Table (C2) Oxidized Rhizospheres on Living Roots (C3)

Sediment Deposits (B2) Oxidized Rhizospheres on Living Roots (C3) (where tilled) Drift Deposits (B3) (where not tilled) Crayfish Burrows (C8) Algal Mat or Crust (B4) Presence of Reduced Iron (C4) Saturation Visible on Aerial Imagery (C9) Iron Deposits (B5) Thin Muck Surface (C7) Geomorphic Position (D2) Inundation Visible on Aerial Imagery (B7) Other (Explain in Remarks) FAC-Neutral Test (D5) Water-Stained Leaves (B9) Frost-Heave Hummocks (D7) (LRR F)

Field Observations: Surface Water Present? Yes No Depth (inches):Water Table Present? Yes No Depth (inches):Saturation Present? Yes No Depth (inches):(includes capillary fringe)

Wetland Hydrology Present? Yes No

Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks:

W-1

0-2 10 YR 6/2 gravel

2

gravel✔

Soil appears to be greatly affected by adjacent roadway. Gravel was found at surface level and restricted diggingbelow 2 inches.

✔

✔✔

✔

✔

✔

✔ ✔

Google Earth aerial photograph



Attachment D: Hydraulic Exhibits

oak hill parkway water resources technical report · 2020-04-01 · the environmental review,...

Documents