attachment-1-rfb-dncr-2026-10.pdf
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- Solicitation number
- RFB DNCR 2026-10
- Issued by
- Carroll County, New Hampshire
About this file
This document contains final design drawings prepared by HEB Engineers, Inc. for the U.S. Department of Agriculture Forest Service, Region 9, for the Corridor 19 Bridges project located on the White Mountain National Forest, Saco Ranger District in Chatham, Carroll County, New Hampshire. The project involves the design and construction of two snowmobile bridges over Langdon Brook and an unnamed tributary on Forest Road 244. The design drawings, dated May 30, 2025, include comprehensive plans and profiles for roadway construction, bridge structures, substructures, erosion and sediment control measures, and channel sections. The drawing set comprises 23 sheets organized into civil/structural sections (covering roadway plans, profiles, sections, and bridge details) and environmental resource sections (addressing erosion control, channel work, and environmental compliance). Two bridge structures are identified: Structure #092200000035580 (McDonough Brook 1) at coordinates 44.15719, -71.03632 and Structure #092200000035579 (McDonough Brook 2) at coordinates 44.15779, -71.03698. The drawings were designed by COB and JKM, checked by HEB Engineers, and approved by regional Forest Service personnel as of September 10, 2025.
The design specifications include typical roadway sections with defined widths and cross-slopes, bridge plans and elevations at 1/4-inch scale, substructure plans with survey layouts, and detailed erosion and sediment control plans at 1-inch to 10-foot scale. Environmental resource notes indicate consideration of water quality and habitat protection during construction. The drawings reference typical channel sections and provide detailed erosion control specifications. No specific budget, pricing, or contract award information is contained within this design document set, as it serves as the technical basis for future bridge approach construction and bridge installation work.
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EASTERN REGION
US Department of Agriculture Forest Service
CORRIDOR 19 BRIDGES
White Mountain National Forest Saco Ranger District
SHEET NAME
FOREST DEVELOPMENT PROJECT
PROJECT
LOCATION
Region Nine
1 C0.01 COVER SHEET
2 C0.02 GENERAL NOTES
3 C1.11 LANGDON BROOK ROADWAY PLAN & PROFILE
4 C1.12 TRIBUTARY ROADWAY PLAN & PROFILE
5 C3.01 TYPICAL ROADWAY SECTION
6 C3.20 ROADWAY SECTIONS 0+80 - 3+90
7 C3.21 ROADWAY SECTIONS 4+00 - 6+00
8 S1.01 LANGDON BROOK BRIDGE PLAN & ELEVATION
9 S1.02 TRIBUTARY BRIDGE PLAN & ELEVATION
10 S1.21 LANGDON BROOK SUBSTRUCTURE PLAN & SURVEY
LAYOUT
11 S1.22 TRIBUTARY SUBSTRUCTURE PLAN & SURVEY
LAYOUT
12 S5.11 SUBSTRUCTURE SECTION & ELEVATIONOVER LANGDON BROOK
Scale: 1"=5000'
Chatham, Carroll County, NH
FINAL DESIGN DRAWINGS
TITLE
AND UNNAMED TRIBUTARY Supplemental Plans
1 V1.01 EXISTING - FEATURES PLAN
2 W0.01 ENVIRONMENTAL RESOURCE NOTES
3 W1.11 LANGDON BROOK PLAN & PROFILE
4 W1.12 TRIBUTARY PLAN & PROFILE
5 W1.21 LANGDON BROOK EROSION & SEDIMENT CONTROL PLAN
6 W1.22 TRIBUTARY EROSION & SEDIMENT CONTROL PLAN
7 W3.01 TYPICAL CHANNEL SECTIONS
8 W3.11 LANGDON BROOK CHANNEL SECTIONS
9 W3.12 TRIBUTARY CHANNEL SECTIONS
10 W5.11 EROSION & SEDIMENT CONTROL DETAILS
Structure #092200000035580, McDonough Brook 1 Latitude: 44.15719, Longitude: -71.03632
Structure #092200000035579, McDonough Brook 2 Latitude: 44.15779, Longitude: -71.03698
FR 244
May 30, 2025
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U.S. DEPARTMENT OF AGRICULTURE
FOREST SERVICE
R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
05/30/2025
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
N.T.S.
C0.02
General Notes
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
05/30/2025
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1"=10'
C1.11
Langdon Brook Roadway Plan & Profile
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
05/30/2025
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1"=10'
C1.12
Tributary Roadway Plan & Profile
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
05/30/2025
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
3/4"=1'-0"
C3.01
Typical Roadway Section
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
05/30/2025
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1"=10'
C3.20
Roadway Sections 0+80 - 3+90
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
05/30/2025
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1"=10'
C3.21
Roadway Sections 4+00 - 6+00
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AM
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
05/30/2025
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1/4" = 1'-0"
S1.01
Langdon Brook Bridge Plan & Elevation
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
05/30/2025
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1/4"=1'-0"
S1.02
Tributary Bridge Plan & Elevation
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
05/30/2025
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1/4"=1'-0"
S1.21
Langdon Brook Substructure Plan & Survey Layout
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
05/30/2025
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1/4"=1'-0"
S1.22
Tributary Substructure Plan & Survey Layout
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
05/30/2025
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
AS NOTED
S5.11
Substructure Section & Elevation
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AM
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
12/03/2024
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
N/A
W0.01
Environmental Resource Notes
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
12/03/2024
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1"=10'
W1.11
Langdon Brook Plan and Profile
P:
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
12/03/2024
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1"=10'
W1.12
Tributary Plan and Profile
P:
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
12/03/2024
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1"=10'
W1.21
Langdon Brook Erosion & Sediment Control Plan
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
12/03/2024
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1"=10'
W1.22
Tributary Erosion & Sediment Control Plan
P:
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R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
12/03/2024
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1" = 1'-0"
W3.01
Typical Channel Sections
P:
\J ob s\
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M , c br ad
R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
12/03/2024
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1" = 10'
W3.11
Langdon Brook Channel Sections
P:
\J ob s\
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3:
A M
, c br ad
R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
12/03/2024
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
1" = 10'
W3.12
Tributary Channel Sections
P:
\J ob s\
\2
3-
N
H D
N C
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Tw o
Sn ow m ob ile B rid ge s, C or rid or
9, C ha th am , N
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D es ig n\
Sh ee t F ile s\
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:1
3:
A M
, c br ad
R-9
Corridor 19 Bridges over Langdon Brook & Unnamed Tributary
White Mountain National Forest Saco Ranger District
Drawing Title
Designed/Drawn
Checked
CAD File No.
Date
Scale
Project
Drawing No.
COB
JKM
2023-004
12/03/2024
No.
Revision/Issue Date
General Notes
HEB Engineers, Inc.
PO Box 440, 2605 White Mountain Hwy.
North Conway, NH 03860 www.hebengineers.com Office (603) 356-6936
As Noted
W5.11
Erosion & Sediment Control Details
P:
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N C
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| Sheets and Views |
| 2023-004 C0.01 Cover Sheet-Cover Sheet |
| 2023-004 C0.02 General Notes-C0.02 |
| 2023-004 C1.0x Roadway Plan & Profile-C1.11 |
| 2023-004 C1.0x Roadway Plan & Profile-C1.12 |
| 2023-004 C3.01 Typical Roadway Section-C3.01 |
| 2023-004 C3.20 Roadway Sections-Roadway Section 0+80-3+90 |
| 2023-004 C3.20 Roadway Sections-Roadway Sections 4+00-6+00 |
| 2023-004 S1.01 Bridge Plan & Elevation-S1.01 |
| 2023-004 S1.01 Bridge Plan & Elevation-S1.02 |
| 2023-004 S1.2x Substructure Plan-S1.21 Substructure Plan |
| 2023-004 S1.2x Substructure Plan-S1.22 Substructure Plan |
| 2023-004 S5.11 Substructure Section-S5.11 |
| 2025-08-21T08:10:36-0400 | |
| JAMES INNES |
| 2025-08-25T09:26:26-0400 | |
| WARREN LEES |
| 2025-08-25T16:01:33-0400 | |
| DEREK IBARGUEN |
| Regional Bridge Program Mgr R09 | |
| 2025-09-10T09:39:44-0500 | |
| R09 Regional Office | |
| Jeffrey W. Dulka | |
| I have reviewed this document |
| 2025-09-10T10:31:09-0500 | |
| JONATHAN HEYL |
File details come from the government source that posted it. Updated .