South Oak Cliff Corridor Blue Line Extension 

Final Local Environmental Assessment    C‐1 

 

Appendix C 5% Design Plan and Profile Drawings/

Additional Design Information   The 5% plan and profile drawings were provided  in a separate volume with the Draft Local EA and have not changed. Hard copies are available for review at study area libraries and at DART Headquarters. An electronic PDF version is available for viewing on www.DART.org/SOC3.    

South Oak Cliff Corridor Blue Line Extension 

C‐2    Final Local Environmental Assessment 

ADDITIONAL DESIGN INFORMATION The following  information was developed after the  issuance of the 5% Preliminary Engineering (PE) drawings provided with  the Draft Environmental Assessment  (EA).   The 5% PE package  is not being modified  for  this  Final  EA; however,  some of  the  information discussed below has resulted  in design  refinements  that are addressed  in  this Final EA and will be carried  forward into final design.  Exhibit 1 –  Geothermal Wells and Police Driveway Relocation Exhibit 2 –  Ledbetter Station Platform Extension and Level Boarding Modifications Concept Exhibit 3 –  Ledbetter Station Architectural Site Plan Changes Exhibit 4 –  Oncor Transmission Lines Crossing and Steel Pole Assessment 

   

South Oak Cliff Corridor Blue Line Extension 

Final Local Environmental Assessment    C‐3 

GEOTHERMAL WELLS AND POLICE DRIVEWAY RELOCATION After issuing the 5% PE drawings, DART was informed that multiple geothermal wells exist in the landscaped area on the east side of the Dallas South Central Police Station between the police station building and Patrol Way.  This area is where the proposed bridge structure for the South Oak  Cliff  Corridor  Blue  Line  Extension  project  is  located.  As‐built  drawings  showing  the geothermal wells were subsequently received from the City of Dallas. The actual configuration of  the geothermal wells was estimated based on coordination with engineers and contractors involved with the geothermal well installation and will need to be verified as part of additional subsurface  utility  investigation  (SUE)  during  final  design.  The  attached  exhibit  shows  the estimated  location  of  the  geothermal  wells,  and  also  shows  proposed modifications  to  the 5% design. The proposed design avoids the geothermal wells, and also includes relocation of the northern police station driveway  in order  to  increase  the vertical clearance over  the driveway from  between  the  12.7‐14.7  foot  clearance  discussed  in  the Draft  EA  to  a  new  clearance  of 15.8 feet described in this Final EA. The second exhibit includes a cross section showing that the total structural depth of the bridge structure above the driveway can be decreased  in order to provide the 15.8 foot vertical clearance at that location.  Also, moving the driveway south would allow for  installation of bridge piers  in  locations outside the anticipated geothermal well areas near the driveway.   

485.5

486.2

487.5

487.5

487.6

488.2

488.3

488.4

488.5

488.6

488.7

488.8

489.1

489.3

490

490

490

490.2

490.3

490.9

491.1

491.6

491.7

492.5

492.6

492.9

494.3

495

495.5

495.7

495.8

500

502.7

505

510

513.4

514.5

515

521.6

2104

SM

H

DALLAS 8" PVC SS

DALLAS 12" PVC W

DALLAS 12" PVC W

DALLAS 8" PVC SS

SMH

FH

FH

RCP SD

DALLAS 24" DALLAS 36" RCP SD

ONCOR UGE 12.5 KV

"84 S

AL

LA

D

DS

PC

R

"4

2

SA

LL

AD

DS

PC

R

"4

2

PC

R

100’ RO

W

80’ R

OW

74+0

0

TS 75+99.2776

+00

SC 76+49.27

78+00

80+0082+00

CS 83+49.82

TS 75+95.86

76+0

0

SC 76+45.86

78+00

80+00

82+00

CS 83+55.36

À SO

C-3

SB

À SO

C-3

NB

15’-6" (T

YP)

À SOC-3 SB

À SOC-3 NB

15’-6" (T

YP)

8’-6" (T

YP)

SOC3-CC

SOC3-C

1300.00’

700.55’

1.25"

1.53"

30 MPH

Ls=

Ea=

V=

Eu=

Lc=

Rc=

(SB)SOC3-C

50.00’

PVI 77+

10.00

EL 509.66

+ 1.00%

+ 3.41%

LVC= 260’

PVI 82+

00.00

EL 526.37

LVC= 440’

493.66

493.10

492.88

495.28

494.32

493.65

492.67

492.00

491.37

491.02

491.00

512.80

514.43

516.14

517.84

519.53

521.04

522.32

523.38

524.22

524.83

525.23

ex = 0.78’

K = 108

ex = -2.15’

K = 113

EL 508.36

VP

C 75+

80.00

EL 514.09

VPT 78+

40.00

EL 518.87

VP

C 79+

80.00

16.5’

MI

N

ENTRANCE

EXISTING

DRIVEWAY

EXISTING

12.4’

CLE

AR

AN

CE

EN

D

CA

MP

WIS

DO

M ST

ATI

ON

ST

A 75+

36.64

DRIVEWAY

PROPOSED

15.8’

CLE

AR

AN

CE

1315.50’

709.50’

1.25"

1.49"

30 MPH

Ls=

Ea=

V=

Eu=

Lc=

Rc=

(NB)SOC3-CC

50.00’

DART, all rights reserved, 1987-2011c

I:\Projects\_

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Wells Exhibits\S

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O.040

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I:\Projects\_SOUTH\GPC 5\TO 24 SOC-3 PE-EA\EXHIBITS\Geo Wells Exhibits\SOC3-CC1-0010b-GEO.040

REV AMEND CR DATE DESCRIPTION APPCHKENGBY

CONTRACT DWG No. REV

DART PROJECTSCALE

DRAWN

DESIGNED

CHECKED

IN CHARGE

DATE

CONTRACT SHEET No.

DWG No.

11/27/2012

IN-PROGRESS

AUTHORITY OF:

FOR THE PURPOSE OF REVIEW UNDER THE

THIS DOCUMENT IS RELEASED

BIDDING, OR PERMIT PURPOSES.

IT IS NOT TO BE USED FOR CONSTRUCTION,

LINE SECTION SOC-3

LIGHT RAIL TRANSIT SYSTEM

URS CORPORATION TBPE ID #F-3162

214-741-7777

DALLAS, TEXAS 75207

SUITE 6000

1950 NORTH STEMMONS FREEWAY

PRELIMINARY ENGINEERING 5% DESIGN

NOT AN APPROVED DRAWING

AS SHOWN

C. ALLEN

P. ZHAO

78+00 79+00 80+00 81+00 82+00 83+00

VERT

SCALE (IN FEET)

SCALE (IN FEET)

HORIZ

0

0

20

5 20

8040

10 15

530

520

510

500

490

480

470

EXISTI

NG

GR

OU

ND ELE

V

PR

OP

OSE

D T/

R ELE

V

PROPOSED TOP OF RAIL

PROPOSED ROW

PROPOSED ROW

C. KESTILA/J. YEOW

540

530

520

510

500

490

480

470

540

C. KESTILA

GROUND

EXISTING

PIER CAP

INVERTED TEE

PIER OFFSET FROM CENTER OF BRIDGE

(SEE NOTE 4)

STATION

POLICE

CENTRAL

SOUTH

DALLAS

27 NOV 12

75+00 76+00 77+00

509.96

507.54

501.59

498.90

497.33

494.83

507.56

508.06

508.58

509.29

510.23

511.40

URS CORPORATION TBPE ID #F-3162

ON 11/27/2012

CHAD ANTHONY ALLEN, P.E. NO. 88427

FIRE HYDRANT

RELOCATE

OF BRIDGE (SEE NOTE 4)

PIER OFFSET FROM CENTER

DRIVEWAY

RELOCATE

STA 75+00.00 TO STA 83+00.00

GUIDEWAY PLAN AND PROFILE

EXHIBIT 1 OF 2:

GEOTHERMAL WELL

BEAM

TX28

ADJACENT TO PATROL WAY.

PROPOSED BRIDGE PIERS

AS REQUIRED IN AREA OF

RELOCATE 12" WATER LINE

CURB INLET

CONSTRUCT NEW

LOCATIONS HAVE BEEN MORE ACCURATELY DETERMINED.

SOME OF THE GEOTHERMAL WELLS AFTER THEIR

AND THE CITY OF DALLAS MAY DECIDE TO RELOCATE

BRIDGE PIERS MAY NEED TO BE ADJUSTED, OR DART

PROJECT. THE LOCATIONS OF SOME OF THE PROPOSED

TO ISSUING FINAL CONSTRUCTION PLANS FOR THE

VICINITY OF THE PROPOSED BRIDGE PIERS PRIOR

THE LOCATIONS OF THE GEOTHERMAL WELLS IN THE

THE FINAL DESIGN TEAM SHALL FIELD VERIFY THE

RECORD DRAWINGS PROVIDED BY THE CITY OF DALLAS.

ON THIS SHEET ARE APPROXIMATE AND ARE BASED ON

5. THE LOCATIONS OF THE GEOTHERMAL WELLS SHOWN

AROUND THE PIER.

WILL NEED TO BE RECONSTRUCTED AND REROUTED

THE EXISTING SIDEWALK AT EACH PIER LOCATION

IS REQUIRED PER CITY OF DALLAS CRITERIA.

DESIGNER TO DETERMINE IF CRASH PROTECTION

ADJACENT TO PROPOSED BRIDGE PIERS. FINAL

4. CRASH PROTECTION MAY BE REQUIRED FOR ROAD

DESIGN PROCESS.

REQUIRED PRIOR TO COMPLETION OF THE FINAL

CITY OF DALLAS AND DART ABOUT THIS ISSUE IS

PROPERTY. ADDITIONAL COORDINATION WITH THE

ROAD AT THE WEST SIDE OF THE POLICE STATION

ACCESS MAY NEED TO BE PROVIDED FROM CAMP WISDOM

IF THE DRIVEWAY IS REMOVED, REPLACEMENT

CLOSED AND DEMOLISHED AS PART OF THE PROJECT.

THE DRIVEWAY OPEN, OR THE DRIVEWAY MAY BE

DART AND THE CITY OF DALLAS AGREE TO LEAVE

REQUIRED DURING THE FINAL DESIGN EFFORT IF

STATION. A DART DESIGN EXCEPTION WILL BE

CONNECTION TO THE DALLAS SOUTH CENTRAL POLICE

NOT BEING PROVIDED OVER THE NORTHERN DRIVEWAY

FEET ACCORDING TO DART DESIGN CRITERIA IS

3. MINIMUM REQUIRED VERTICAL CLEARANCE OF 16.5

PROJECT.

OTHER SITE IMPROVEMENTS AFFECTED BY THIS

REPLACEMENT PARKING SPACES, DRIVE AISLES AND

DETERMINE THE LOCATION AND CONFIGURATION OF

FURTHER WITH THE CITY OF DALLAS AND DART TO

CONSTRUCTION. FINAL DESIGNER MUST COORDINATE

SUBSTATION MUST BE MITIGATED PRIOR TO

2. LOSS OF PARKING SPACES AT THE DALLAS POLICE

1. SEE DWG. No. CC1-0001 FOR ADDITIONAL NOTES.

NOTE:

(SEE NOTE 5)

WELL (TYP.)

GEOTHERMAL

EXISTING

WELL (TYP.) (SEE NOTE 5)

EXISTING GEOTHERMAL

SOC3-CC1-0010b-GEO.040 11/27/2012 5:01:29 PM

�" = 1’-0"

I. HWANG

C. KESTILA

C. KESTILA

C. ALLEN

1 TYPICAL SECTIONSCALE: �"=1’-0"

2 SCALE: �"=1’-0"

ELEVATION

À BRIDGE

MI

N

8"

40:1 40:140:1 40:1

LOW RAIL

TOP OF

POINT

LOW POINT

HIGH

DECK

EDGE OF DECK

EDGE OF

POINT

LOW

(TYP)

LEVEL

(TYP)

DRIP GROOVEPEJ

HANDRAIL

(TYP)

CONCRETE

TRACK10"

3’-6"

CABLE TROUGHPOLE, NIC

CATENARY

HAND RAIL, TYP

BE

ARI

NG

3"

@ À

10"

PGL

MI

N

1’-0"

FINISHED GRADE FINISHED GRADE

6’-0"

À PIER À PIER

DIA

DRILLED SHAFT

DIA

DRILLED SHAFT

6’-0" min.

6’-6" min.

6’-0" min.

6’-6" min.

TX28 I-GIRDER (TYP)

TEXAS DOT

À SB TRACKÀ NB TRACK

33’-2"

4’-3" 4’-3" 4’-3" 4’-3"8’-8"

MI

N

1’-0"

STA 78+38.50 TO STA 78+93.43

STA 58+96.00 TO STA 59+70.00

4’-10" APPROX.

6’-6"

3’-0"

URS CORPORATION TBPE ID #F-3162

ON 11/27/2012

B.W. ISAAC HWANG, P.E. NO. 59161

27 NOV 12 TYPICAL SECTION 3

TEXAS DOT TX28 I-BEAM

EXHIBIT 2 OF 2:

GEOTHERMAL WELL

DART, all rights reserved, 1987-2011c

I:\Projects\_

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GP

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O 24 S

OC-3 PE-

EA\E

XHI

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Geo

Wells Exhibits\S

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I:\Projects\_SOUTH\GPC 5\TO 24 SOC-3 PE-EA\EXHIBITS\Geo Wells Exhibits\SOC3SX03-GEO.008

REV AMEND CR DATE DESCRIPTION APPCHKENGBY

CONTRACT DWG No. REV

DART PROJECTSCALE

DRAWN

DESIGNED

CHECKED

IN CHARGE

DATE

CONTRACT SHEET No.

DWG No.

11/27/2012

IN-PROGRESS

AUTHORITY OF:

FOR THE PURPOSE OF REVIEW UNDER THE

THIS DOCUMENT IS RELEASED

BIDDING, OR PERMIT PURPOSES.

IT IS NOT TO BE USED FOR CONSTRUCTION,

LINE SECTION SOC-3

LIGHT RAIL TRANSIT SYSTEM

URS CORPORATION TBPE ID #F-3162

214-741-7777

DALLAS, TEXAS 75207

SUITE 6000

1950 NORTH STEMMONS FREEWAY

PRELIMINARY ENGINEERING 5% DESIGN

NOT AN APPROVED DRAWING

SOC3SX03-GEO.008 11/27/2012 3:54:17 PM

South Oak Cliff Corridor Blue Line Extension 

C‐6    Final Local Environmental Assessment 

 

LEDBETTER STATION PLATFORM EXTENSION AND  LEVEL BOARDING MODIFICATIONS CONCEPT 

The  anticipated  extension  and  level  boarding  improvements  at  Ledbetter  Station  have  been modified since the issuance of the 5% PE drawings for the project.  A study is being conducted of existing platforms on the DART Red and Blue Lines  in order to provide consistency with future extension and level boarding modifications throughout the LRT system.  As part of the study, the plans  for  Ledbetter  Station  have  been  revised  to  incorporate  a  proposed  canopy  in  the extension area and a  shortened  ramp  length on  the north end of  the existing platform.   The attached concept drawing shows these  improvements relative to the existing conditions at the platform.     

South Oak Cliff Corridor Blue Line Extension 

C‐8    Final Local Environmental Assessment 

LEDBETTER STATION ARCHITECTURAL SITE PLAN CHANGES 

Additional  coordination  has  been  performed  with  TxDOT  about  the  Ledbetter  Station  site improvements currently shown  in  the 5% PE drawings  for  the project.  It was determined  that the  previously  proposed  northbound  left  turn  lane  into  the  proposed  kiss &  ride  area  from Lancaster Road was too short and did not meet TxDOT design criteria. As a result, a new location for the kiss & ride area has been developed in coordination with TxDOT. The kiss & ride area is now envisioned  to be  located between Shellhorse  Street and 56th Street. Kiss &  ride vehicles would enter at Shellhorse Street, drop‐off on a  lane parallel to the bus  lane, and exit south of 56th Street. A revised architectural site plan is attached to show the new improvements.       

www.kaitexas.com

F. 214.742.0401

T. 214.742.0400

Dallas, TX 75270

Suite 5240

1201 Elm Street

TBPE REGISTRATION No. F-9010

c DART, all rights reserved, 2012-2014

R

LEDBETTER SITE STUDY

DATE

SCALE

DRAWN

DESIGNED

CHECKED

IN CHARGE

G. BRINGAS

V. SADR

J. LIBURY

D. JAMES

AS SHOWNDART PROJECT

URS CORPORATION ID #3162

214-741-7777

DALLAS, TEXAS 75207

SUITE 6000

1950 NORTH STEMMONS FREEWAY

BLUE LINE EXTENSION PE/EA

SOUTH OAK CLIFF 3

LANCASTER ROAD

LANCASTER ROAD

RAMP UP

RAMP UP

UP

UP

UP

UP

KISS AND RIDE

UP

TRACK

"ABOVE 2115

TRACK

"ABOVE 2115

TRACK

"ABOVE 2115

TRACK

8"ABOVE

TYP

GUARDRAIL,

TYP

GUARDRAIL,

SIDEWALK

4.8%SLOPED

22’ WIDE

SIDEWALK

4.8% SLOPED

22’ WIDE

SIDEWALK

4.8% SLOPED

22’ WIDE

LA

NDS

CAPE

NE

W

PLANTERS

NEW

PLATFORM

STEPS TO RAISED

PLATFORM

STEPS TO RAISED

REVISED

SITE LAYOUT STUDY

LEDBETTER STATION

26 NOV 12

PLATFORM

LEVEL BOARDING

GUARD RAIL

SIG

NA

L

TR

AFFIC

SIG

NA

L

TR

AFFIC

SIGNAL

TRAFFIC

UP

UP

PLANTERS

NEW

TRACK

"ABOVE2115

BUSES ONLY

ONLYONLY

ONLY

South Oak Cliff Corridor Blue Line Extension 

C‐10    Final Local Environmental Assessment 

ONCOR TRANSMISSION LINES CROSSING AND STEEL POLE ASSESSMENT  

Additional  coordination  was  conducted  with  Oncor  about  the  proposed  crossing  under  the transmission  lines south of Camp Wisdom Road near Runyon Springs Branch Creek. Oncor has analyzed  the  crossing  and  has  provided  the  attached  drawing  showing  the  steel  pole modifications anticipated to be required as part of this project. Oncor currently believes  it will be necessary to raise three nearby steel poles in order to provide the vertical clearance required over  the proposed South Oak Cliff Corridor Blue Line Extension  tracks. This  includes  the poles immediately adjacent  to and on either side of  the rail crossing and one additional pole  to  the east.  All wires between the three poles and between these poles and the two adjacent outside poles will be required to be adjusted and raised.   This assessment  is based on the track profile currently shown in the 5% PE drawings that were issued with the Draft EA. The possible lowering of the track profile to reduce the extent of pole modification has not yet been assessed and was not considered at the time.   Final design efforts may examine  lowering the profile to minimize pole and wire modifications.     

CONDUCTOR SHOT

32.0

’

90

’ S

TE

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95

’ S

TE

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85

’ S

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364’

392’

403’

418’