Attach_21_Boring_Profiles_0001.pdf
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- Solicitation number
- 140P2026R0020
About this file
This document is a Horizontal Directional Drilling (HDD) Plan and Profile set for the Mesa Verde Waterlines project located in Montezuma County, Colorado. The plans document two separate HDD bore alignments—Morefield 1 and Morefield 2—designed to install water pipeline infrastructure. Morefield 1 features a 1,404-foot total pipe length with a 12-degree entry angle, 0-degree middle segment angle, and 12-degree exit angle, utilizing a 1,600-foot minimum radius. The boring extends from station 4+00 to 16+00 with entry at station 9+18 (elevation 6,844 feet) and exit at station 13+95 (elevation 6,913 feet), providing approximately 47 feet of cover under bedrock contact at the alignment midpoint. Morefield 2 presents a more complex alignment totaling 4,633 feet with multiple curved segments including 12-degree and 14-degree middle angles and a 30-degree exit angle. This section extends from station 16+00 to 44+68, incorporating geophysical readings, wash-over casing provisions through rockfall deposits, and depths ranging from 7,320 to 7,845 feet in elevation.
The technical specifications include geotechnical boring data identified as LE-HDD-08 through LE-HDD-11, with drilled depths ranging from 80 to 89.3 feet. Geological composition consists primarily of Mancos Shale with alluvium and rockfall deposit layers. The design incorporates 16-inch minimum diameter pipe with specific radius curvatures and vertical exaggeration ratios (1:200 for plan view, 1:5 for profile). The project documents are dated November 2023 and prepared by Lithos Engineering, located in Fort Collins, Colorado. The plans establish the geometric alignment and subsurface conditions necessary for successful horizontal directional drilling installation of the waterline infrastructure.
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1+00 16+002+00 3+00 4+00 5+00 6+00 7+00 8+00 9+00 10+00 11+00 12+00 13+00 14+00 15+000+00-1+00-2+00
EL
EV
AT
IO
N (F
T)
STATIONING (FT)
LE-HDD-07
80.9
10.0
15 CH
51 CH
54 CH
2 " SHALE43 SHALE
97 SHALE
96 SHALE
98 SHALE
100 SHALE
88 SHALE
98 SHALE97 SHALE
98 SHALE
97 SHALE
100 SHALE
88 SHALE
93 SHALE
92 SHALE
98 SHALE
LE-HDD-08
80.9
13.0
7 CL
13 CL
22 CL
5 " SHALE
100 SHALE
2 " SHALE
75 SHALE
94 SHALE
92 SHALE
94 SHALE
94 SHALE
95 SHALE
91 SHALE
100 SHALE
95 SHALE
100 SHALE
100 SHALE
92 SHALE
1+00 16+002+00 3+00 4+00 5+00 6+00 7+00 8+00 9+00 10+00 11+00 12+00 13+00 14+00 15+000+00-1+00-2+00
ELEVATION (FT)
APPROXIMATE GROUND SURFACE
538' BOTTOM SEGMENT
335' EXIT ARC335' ENTRY ARC
POINT OF ENTRY
RIG SIDE
STA: 0+00
ELEV: 6889
POINT OF EXIT
PIPE SIDE
STA: 13+95
ELEV: 6910
' E
NT
RY
R
AD
IU
S
48' EXIT SEGMENT
12° ∠
1600' EXIT RADIUS
' EXIT SEGMENT
12°
STA: 0+47
ELEV: 6879
POINT OF
CURVATURE
STA: 3+80
ELEV: 6844
POINT OF
CURVATURE
STA: 9+18
ELEV: 6844
POINT OF
CURVATURE
POINT OF
CURVATURE
STA: 12+50
ELEV: 6879
PIPE SIDE
RIG SIDE
POINT OF ENTRY
STA: 0+00
ELEV: 6889
POINT OF EXIT
STA: 13+95
ELEV: 6913
GEOTECHNICAL BORING
LE-HDD-07
GEOTECHNICAL BORING
LE-HDD-08
0+00 1+00 2+00 3+00 4+00 5+00 6+00 7+00 8+00 9+00 10+00 11+00 12+00 13+00 14+00
HDD PIPE ALIGNMENT
15+00-1+00-2+00
-- 1:200"
HDD PLAN
SAMPLER
BLOWS
PER 12"
GEOLOGIC
UNIT
DEPTH (FT)
BORE HOLE ID
LOCATION OF
SAMPLE
B-X
X
BLOWS
BORING DETAILS:
X
BLOWS
RQD
BLOWS
USCS
USCS
USCS
USCS
USCS
DESCRIPTION
APPROXIMATE BORING LOCATION
LINE TYPES AND SYMBOLS LEGEND:
B-X
APPROXIMATE HDD ALIGNMENT
APPROXIMATE BEDROCK INTERFACE
-- 1:5 VERTICAL EXAGGERATION
HDD PROFILE
HDD MOREFIELD ALIGNMENT GEOMETRY AND LENGTH TABLE
ENTRY SEGMENT (FT) 48 TOTAL PIPE LENGTH2 1404
ENTRY ARC LENGTH (FT) 335 MINIMUM RADIUS (FT) 1600
MIDDLE SEGMENT (FT) 538 ENTRY ANGLE 12°
EXIT ARC LENGTH (FT) 335 MIDDLE SEGMENT ANGLE 0°
EXIT SEGMENT (FT) 148 EXIT ANGLE 12°
TOTAL PLAN DISTANCE (FT)1 1395
APPROXIMATE COVER UNDER
BEDROCK CONTACT AT
MIDPOINT OF ALIGNMENT (FT)
1 DISTANCE AS MEASURED HORIZONTALLY, ON CENTER, BETWEEN ENTRY AND EXIT PITS AT A CONSTANT ELEVATION
2 PIPE LENGTH FROM TIE-IN TO TIE-IN LOCATION
HORIZONTAL DIRECTIONAL DRILLING (HDD) GENERAL NOTES:
1. HORIZONTAL DIRECTIONAL DRILLING MATERIALS
1.1. THE PRODUCT PIPE IS ASSUMED TO BE 6-INCH DIAMETER FLEXSTEEL PIPE.
1.2. DRILLING MUD SHOULD BE DESIGNED TO MAINTAIN BOREHOLE STABILITY AND FACILITATE
MATERIAL EXCAVATION AND CIRCULATION THROUGHOUT PILOT BORE INSTALLATION, REAMING,
AND FINAL PRODUCT PIPE PULL IN.
1.3. SPECIFIC HDD EQUIPMENT AND TOOLING SHOULD BE SELECTED IN ORDER TO SUCCESSFULLY
COMPLETE THE PROPOSED INSTALLATION.
2. HDD GEOMETRIC CONSTRAINTS
2.1. GROUND SURFACE TOPOGRAPHIC ASSUMPTIONS ARE BASED ON HDR PLAN AND PROFILE
DRAWINGS.
2.2. TEMPORARY EASEMENT BOUNDARIES ARE NOT SHOWN FOR CLARITY.
2.3. "ENTRY" AND "EXIT" CURVE DESIGNATIONS ARE UNIQUE TO THE PILOT BORE AND DO NOT
NECESSARILY APPLY TO REAM PASS(ES) OR PIPE PULL IN.
2.4. THE PRESENTED PLAN AND PROFILE IS INTENDED TO IDENTIFY GEOLOGY ALONG THE DESIGN HDD
ALIGNMENT. IN THE EVEN OF DISCREPENCIES BETWEEN THE PRESENTED PLAN AND PROFILE AND
THE CONTRACT DRAWINGS, THE CONTRACT DRAWINGS SHALL GOVERN.
3. HORIZONTAL DIRECTIONAL DRILLING DESIGN
3.1. A GEOTECHNICAL SUBSURFACE INVESTIGATION WAS COMPLETED BY LITHOS INCLUDING BORINGS
GENERALLY LOCATED AS SHOWN. ADDITIONAL INFORMATION ABOUT THIS LOCATION IS INCLUDED
IN GEOTECHNICAL INVESTIGATION REPORT BY LITHOS ENGINEERING (GIR, 08-2023).
ALLUVIUM
GEOLOGIC LEGEND:
MANCOS SHALE
BORING LOCATIONS AND DRILLED DEPTH
BORING LATITUDE LONGITUDE ELEVATION DRILLED DEPTH (FT)
LE-HDD-07 37.315292 -108.400564 6892 81.3
LE-HDD-08 37.311736 -108.400886 6913 81.7
FO
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LIN
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SH
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MO
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SCALE IN FEET
100 200
GEOPHYSICAL READING
LINE 2
APPROXIMATE HDD PIPE ALIGNMENT
GEOTECHNICAL BORING
LE-HDD-9
GEOTECHNICAL BORING
LE-HDD-9-A
GEOTECHNICAL BORING
LE-HDD-10
GEOTECHNICAL
BORING
LE-HDD-11
STA: 0+00
ELEV: 6913
POINT OF
ENTRY PIPE
SIDE STA: 43+74
ELEV: 7848 POINT OF EXIT RIG SIDE
0+00 1+00 2+00 3+00 4+00 5+00 6+00 7+00 8+00 9+00 10+00 11+00 12+00 13+00 16+00 17+00 18+00 19+0014+00 15+00 20+00 21+00 22+00 23+00 24+00 25+00 26+00 27+00 28+00 29+00 30+00 31+00 32+00 33+00 34+00 35+00 36+00 37+00 38+00 39+00 40+00 41+00 42+00 43+00 44+00
GEOPHYSICAL READING
LINE 1
GEOPHYSICAL READING
LINE 3
GEOPHYSICAL READING
LINE 4
TOP RUINS ROAD
STATIONING (FT)
LE-HDD-09
80.9
(41.0)33.0 CL
SHALE
LE-HDD-10
80.0
RF
LE-HDD-11
RF
80.0
LE-HDD-9-A
81.1 37.0
SC
SHALE
6.0 RF
LE-HDD-9-B
89.379.0
SC
SHALE
7.0
RF
18+0016+0014+0012+0010+008+006+004+002+000+00 24+0022+0020+00 28+0026+00 32+0030+00 38+0036+0034+00 42+0040+00 46+0044+00-2+00 48+00
18+0016+0014+0012+0010+008+006+004+002+000+00 24+0022+0020+00 28+0026+00 32+0030+00 38+0036+0034+00 42+0040+00 46+0044+00-2+00 48+00
STA: 44+68
ELEV: 7849
350' MIDDLE ARC
POINT OF EXIT
PIPE SIDE
1600' EXIT RADIUS
STA: 0+00
ELEV: 6913
POINT OF
ENTRY
RIG SIDE
STA: 0+88
ELEV: 6894
POINT OF
CURVATURE
90' ENTRY
SEGMENT
12° ∠
STA: 4+21
ELEV: 6859
335' ENTRY ARC
1800 ENTRY RADIUS
407' SEGMENT
STA: 8+28
ELEV: 6859
POINT OF
CURVATURE
STA: 11+75
ELEV: 6897
POINT OF
CURVATURE
2494' SEGMENT 12.5° ∠
STA: 36+13
ELEV: 7439
POINT OF
CURVATURE
STA: 40+62
ELEV: 7615
POINT OF
CURVATURE
469' EXIT SEGMENT
30° ∠
488' EXIT ARC
POINT OF
CURVATURE
1600' RADIUS
APPROXIMATE
GROUND
SURFACE
100' MIN
C-4
300.0
RF
50.8
SHALE
C-3
261.8
RF46.0
SHALE
C-1
192.7
RF24.2
SHALE
C-2
246.0
RF
78.2
SHALE
16"Ø MIN, 266' WASH OVER
CASING THROUGH
ROCKFALL
GROUNDWATER
ELEVATION [FT]
GEOLOGIC
UNIT
DEPTH (FT)
LOCATION ID
B-X
X
BORING & GEOPHYSICAL DATA DETAILS:
X
APPROXIMATE BORING LOCATION
LINE TYPES AND SYMBOLS LEGEND:
B-X
APPROXIMATE HDD ALIGNMENT
BEDROCK INTERFACE
APPROXIMATE GEOPHYSICAL
TESTING LOCATION
-- 1:1 VERTICAL EXAGGERATION
HDD PROFILE
HDD MOREFIELD 2 ALIGNMENT GEOMETRY AND LENGTH TABLE
ENTRY SEGMENT (FT) 90 TOTAL PIPE LENGTH2 (FT) 4633
ENTRY ARC LENGTH (FT) 335 MINIMUM RADIUS (FT) 1600
MIDDLE SEGMENT (FT) 407 ENTRY ANGLE 12°
MIDDLE ARC LENGTH (FT) 350 MIDDLE SEGMENT ANGLE 0°
MIDDLE SEGMENT II (FT) 2494 MIDDLE SEGMENT II ANGLE 14°
EXIT ARC LENGTH (FT) 488 EXIT ANGLE 30°
EXIT SEGMENT (FT) 469
TOTAL PLAN DISTANCE1 (FT) 4468
1 DISTANCE AS MEASURED HORIZONTALLY, ON CENTER, BETWEEN ENTRY AND EXIT PITS AT A CONSTANT ELEVATION
2 PIPE LENGTH FROM TIE-IN TO TIE-IN LOCATION
ALLUVIUM ROCKFALL DEPOSIT
MANCOS SHALE
GEOLOGIC LEGEND:
-- 1:350"
HDD PLAN
HORIZONTAL DIRECTIONAL DRILLING (HDD) GENERAL NOTES:
1. HORIZONTAL DIRECTIONAL DRILLING MATERIALS
1.1. THE PRODUCT PIPE IS ASSUMED TO BE 6-INCH DIAMETER FLEXSTEEL PIPE.
1.2. DRILLING MUD SHOULD BE DESIGNED TO MAINTAIN BOREHOLE STABILITY AND FACILITATE
MATERIAL EXCAVATION AND CIRCULATION THROUGHOUT PILOT BORE INSTALLATION, REAMING,
AND FINAL PRODUCT PIPE PULL IN.
1.3. SPECIFIC HDD EQUIPMENT AND TOOLING SHOULD BE SELECTED IN ORDER TO SUCCESSFULLY
COMPLETE THE PROPOSED INSTALLATION.
2. HDD GEOMETRIC CONSTRAINTS
2.1. GROUND SURFACE TOPOGRAPHIC ASSUMPTIONS ARE BASED ON HDR PLAN AND PROFILE
DRAWINGS.
2.2. TEMPORARY EASEMENT BOUNDARIES ARE NOT SHOWN FOR CLARITY.
2.3. "ENTRY" AND "EXIT" CURVE DESIGNATIONS ARE UNIQUE TO THE PILOT BORE AND DO NOT
NECESSARILY APPLY TO REAM PASS(ES) OR PIPE PULL IN.
2.4. THE PRESENTED PLAN AND PROFILE IS INTENDED TO IDENTIFY GEOLOGY ALONG THE DESIGN HDD
ALIGNMENT. IN THE EVEN OF DISCREPENCIES BETWEEN THE PRESENTED PLAN AND PROFILE AND
THE CONTRACT DRAWINGS, THE CONTRACT DRAWINGS SHALL GOVERN.
3. HORIZONTAL DIRECTIONAL DRILLING DESIGN
3.1. A GEOTECHNICAL SUBSURFACE INVESTIGATION WAS COMPLETED BY LITHOS INCLUDING BORINGS
GENERALLY LOCATED AS SHOWN. ADDITIONAL INFORMATION ABOUT THIS LOCATION IS INCLUDED
IN GEOTECHNICAL INVESTIGATION REPORT BY LITHOS ENGINEERING (GIR, 08-2023).
BORING LOCATIONS AND DRILLED DEPTH
BORING LATITUDE LONGITUDE ELEVATION DRILLED DEPTH (FT)
LE-HDD-09 37.309972 -108.401492 6920 80.9
LE-HDD-9-A 37.309100 -108.401086 7007 81.1
LE-HDD-9-B 37.307619 -108.403261 7095 89.3
LE-HDD-10 37.306286 -108.405381 7320 80.0
LE-HDD-11 37.300986 -108.410864 7845 80.0
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SCALE IN FEET
175 350
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