Appendix D - LMTF RF 35 Topo Survey.pdf

PDF 844 KB Posted May 15, 2026

Attached to: Little Mountain Testing Facility (LMTF) Progress-Design-Build OT
Solicitation number: W91238269A001
Issued by: Department of the Army Corps of Engineers Engineering District Sacramento

About this file

Written by GovTribe AI · May 15, 2026

This document is a topography survey map and surveyor's certificate for the HAFB Little Mountain Site located in Weber County, Utah. The survey was performed by Rimrock Engineering and Development under the direction of Professional Land Surveyor Travis R. Gower (License #6439364) on behalf of Bohannan Huston and client Amit Pathak. The survey utilized the Utah Virtual Reference Network (VRS) GPS system with Trimble equipment (R12i and R8s GPS units, S5 robotic total station, and TSC5 data collectors) to establish control points and topographic features across the site, which encompasses the south half of Section 13 and north half of Section 34, Township 6 North, Range 2 West, Salt Lake Base and Meridian.

The survey identifies eight control points with precise northing, easting, and elevation coordinates in US Survey Feet using NAVD 88 elevations and GEOID18(CONUS) model. The map depicts site features including buildings, water tanks, gas lines, water lines, power lines, telephone/communication lines, utility poles, water valves, fencing, asphalt edges, curbs and gutters, and topographic contours at 1" = 60' scale. The surveyor's certificate, dated May 16, 2025, certifies that the topography survey was completed under the client's authority. The deliverable includes a detailed site plan (RGC2511-01-01) prepared by Bohannan Huston and checked by Rimrock Engineering and Development.

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AIR CONDITIONING

EQUIPMENT

AIR CONDITIONING

EQUIPMENT

BUILDING

FINISH

FLOOR

EL=4273.35

GUARD SHACK

FINISH FLOOR

EL=4273.41

BUILDING

FINISH

FLOOR

EL=4278.40

BUILDING

FINISH

FLOOR

EL=4270.30

WATER

TANK

WATER

TANK

BUILDING

FINISH

FLOOR

EL=4372.49

RIMROCK

ENGINEERING &

DEVELOPMENT

2 OF SEC 13 & N

2 OF SEC. 34, T.6N., R.2W., SLB&M.,

WEBER COUNTY, UTAH

HAFB LITTLE MOUNTAIN SITE

TOPOGRAPHY

GAS LINE (PAINTED LINE)

WATER LINE (PAINTED LINES)

SET MONUMENT (AS NOTED)

FOUND MONUMENT (AS NOTED)

LEGEND

FENCE

EDGE OF ASPHALT

CURB AND GUTTER

CONTOURS

WATER VALVE

UTILITY POLE / LIGHT POLE

PIN FLAG LINE

BUILDING LINES

POWERLINE (PAINTED LINES)

TELEPHONE / COMMUNICATION

(PAINTED OR PIN FLAGGED LINES)

1" = 60'

RGC2511-01-01

BIHANNAN HUSTON

LOCATED IN THE:

SOUTH HALF OF SECTION 13 AND THE NORTH HALF OF SECTION 34,

TOWNSHIP 6 NORTH, RANGE 4 WEST

SALT LAKE BASE AND MERIDIAN,

WEBER COUNTY, UTAH

HAFB LITTLE MOUNTAIN SITE TOPOGRAPHY

SURVEYOR'S CERTIFICATE

I, TRAVIS R. GOWER, DO HEREBY CERTIFY THAT I AM A PROFESSIONAL LAND SURVEYOR AND THAT

I HOLD LICENSE NUMBER 6439364 AS PRESCRIBED BY THE LAWS OF THE STATE OF UTAH. I

FURTHER CERTIFY THAT BY THE AUTHORITY OF THE CLIENT, A TOPOGRAPHY SURVEY OF THE

TRACT OF LAND DESCRIBED HEREIN, WAS PERFORMED UNDER MY DIRECTION.

DATE

NARRATIVE

RIMROCK ENGINEERING AND DEVELOPMENT WAS HIRED BY AMIT PATHAK WITH BOHANNAN

HUSTON TO PERFORM A TOPOGRAPHY SURVEY. RIMROCK E&D UTILIZED THE UTAH VIRTUAL

REFERENCE NETWORK (VRS) TO PERFORM THE GPS PORTION OF THIS TOPOGRAPHY SURVEY.

UTAH NORTH ZONE 4301 NAD 83. USING US SURVEY FEET. NAVD 88 ELEVATIONS. GEOID MODEL GEOID18(CONUS). RIMROCK UTILIZED TRIMBLE EQUIPMENT R12i AND R8s GPS. S5 ROBOTIC TOTAL

STATION & TSC5 DATA COLLECTORS. CONTROL POINT VALUES LISTED ON THIS PAGE.

TRAVIS R. GOWER

P.L.S. 6439364

PROJECT #

CONTROL POINTS

#16 NORTHING=3618367.812 EASTING=1437460.892 EL=4623.69 WEBER COUNTY BRASS CAP

QUARTER CORNER SECTION 13 / 18 1966

#15 NORTHING=3615147.233 EASTING=1437460.892 EL=4299.698 PK/MAG NAIL IN ASPHALT

TURNAROUND NEAR MAIN GATE.

#100 NORTHING=3614948.688 EASTING=1435200.874 EL=4359.491 REBAR SET NEAR FENCE

CORNER ALONG ENTRANCE ROAD AND ROAD TO TOWERS.

#101 NORTHING=3614668.119 EASTING=1434603.683 EL=4368.088 REBAR SET NEAR ANTENNA AND

WEATHER MONITORING EQUIPMENT.

#104 NORTHING=3615416.749 EASTING=1433554.876 EL=4273.320 MAG NAIL SET IN SOUTHEAST

CORNER OF PARKING LOT

#103 NORTHING=3615081.475 EASTING=1434530.686 EL=4329.404 BALLING CAP IN CONCRETE

BASE NEAR PIEZOMETER.

#107 NORTHING=3615500.847 EASTING=1434166.711 EL=4285.523 3" ALUMINIUM CAP WITH X

STAMPED ON TOP NEAR SWING.

#108 NORTHING=3615795.423 EASTING=1434336.671 EL=4269.136 BRASS CAP IN CONCRETE ON

ELECTRICAL BOX BETWEEN 2 METAL LIDS.

1" = 60' 1"0

May 16,2025 5-16-25

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SEWER MANHOLE LID EL=4274.88 FL 4IN FRM SW= 4270.25 FL 6IN TO NE=4269.38

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CLEANOUT

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CLEANOUT

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CLEANOUT

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CLEANOUT

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CLEANOUT

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FIRE HYD.

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FIRE HYD.

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BOLLARD (TYP.)

AutoCAD SHX Text STORMDRAIN MANHOLE OIL/WATER SEPERATOR LID EL=4268.59 FL 6IN PVC OUT=4265.32 FL 6IN PVC IN=4265.62

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CLEANOUT

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STORMDRAIN MANHOLE OIL/WATER SEPERATOR LID EL=4269.22 FL 6IN PVC IN=4265.92

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GROUND ROD COVER

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GAS METER

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STEEL POST & CONCRETE BASE FOR PERGOLA

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2FT CONC BASE

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SWING

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GAS VALVE

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GAS VALVE

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GAS VALVE

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FIRE HYD.

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FDC.

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FIRE HYD.

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BOLLARD (TYP.)

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CUT IN ASPH.

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BOLLARD (TYP.)

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FLAG POLE

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AutoCAD SHX Text 3' STORM DRAIN INLET. BOX TG EL=4277.83 FL 24" CMP TO NW=4274.93 FL 24" CMP FROM E=4274.93

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3' STORM DRAIN INLET. BOX TG EL=4278.23 12 FULL OF GRAVEL

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STORM DRAIN INLET BOX TG EL=4264.88 FL 24" CMP E TO W=4261.88

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CLEANOUT

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COMM. BOX

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ELEC. BOX

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LIGHT POLE (TYP.)

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BORE HOLE KLF-24-02

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BORE HOLE KLF-29-06

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BORE HOLE KLF-24-05

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BORE HOLE KLF-2403

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BORE HOLE KLF-2408

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BORE HOLE KLF-2404

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BORE HOLE KLF-2407

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BORE HOLE KLF-2401

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BOLLARD (TYP.)

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PIEZOMETER (TYP.)

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COMMUNICATION JUNC. BOX

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TELE PEDESTALS (2)

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ANTENNA

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ELECTRICAL JUNC. BOX

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WEATHER AND ATMOSPHERIC EQUIPMENT

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REBAR CONTROL POINT #101 EL=4368.09

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REBAR CONTROL POINT #100 EL=4359.49

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BRASS CAP CONTROL POINT #108 EL=4269.14

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#107 3" ALUMINIUM CAP WITH "X" ON TOP EL=4285.52

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BALLING REBAR CAP IN CONCRETE #103 EL=4329.40

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LIGHT POLE (TYP.)

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LIGHT POLE (TYP.)

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TELE./COMM. MANHOLE LID EL=4317.72

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TEE POST

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TEE POST

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TEE POST

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TEE POST

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TEE POST

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TEE POST

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TEE POST

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3' STORMDRAIN JUNC. BOX. TG EL=4367.86 FL12" PIPE TO NW=4364.96

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FL12" PIPE FROM SE=4362.14

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WATER VALVES(2)

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WATER VALVES(3)

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POSSIBLE UTILITY CROSSING

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PIN FLAGGED TELE./COMMUNICATION LINE

AutoCAD SHX Text STORM DRAIN INLET. BOX TRIANGLE GRATE TG EL=4268.75 FL 24" CMP TO W=4265.24 FL 24" CMP FROM E=4265.46 FL 12" FROM SW =4266.73

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CHAIN LINK FENCE

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BARB WIRE FENCE

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BARB WIRE FENCE

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BARB WIRE FENCE

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BARB WIRE FENCE

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BARB WIRE FENCE

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COMM. MANHOLE

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COMM. MANHOLE

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CONCRETE STRUCTURE

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AutoCAD SHX Text 5/15/2025

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DATE:

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DRAWN:

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CHECKED:

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PROJECT NAME

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GOWER

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AutoCAD SHX Text tgower@re-n-d.com

AutoCAD SHX Text 801-837-0633

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File details come from the government source that posted it. Updated May 15, 2026.