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BLM 1982
EL: 5012.21
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ACCESS ROAD
PROPOSED
CULVERT
WELL
1.5H:1V SLOPES
100 -YR FLOOD PLAIN
1982 FLOOD STUDY
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DIRE
APPROX. 00 -YR FLOOD PLAIN
ADJUSTED OR 2015 SURVEY
EXISTING ACCESS
TO UNA GRAVEL PIT
M NING
DIRECTION
EXISTING WETLANDS
DELINEATION
1 4972
9.55 an
4970
MINI
DI
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CTION
BASE FLOOD ELEVATION
1982 FLOOD STUDY
ZONE AE
9 FLOOD TUDY
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SAMPLING POINT
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5°19'03"
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EXISTING W
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NOTES:
BASE FLOOD ELEVATION
1982 FLOOD STUDY
EASEM NT
1/4 CORNER'
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APPROX. 100 -YR FLOOD PLAIN
ADJUSTED FOR 2015 SURVEY
5040
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BASE FLOOD ELEVATION
1982 FLOOD STUDY
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LEGEND
Phase Line
Parcel Lines
Subject Boundary Line
Building
Fence
Gas and Water Wells
Existing Contour
Existing Index Contour
Proposed Contour
Proposed Index Contour
Range or Township labels
Section line
Section numbers
Asphalt Road
Unimproved Road
Railroad
Drainage Ditch/Stream
Buried Utility Line
Survey Monument
River/Pond
Wetlands
100 -Year Flood Plain
1982 Army Coprs of Engineers
100 -Year Flood Plain
Adjusted to 2015 Topographic Survey
Base Flood Elevations
1982 Army Coprs of Engineers
0 0
'WELL
R1E T2N
1-36
O
lr 1111M,
4994 (NGVD'29)
Base Flood Elevations
Adjusted to NAVD'88 4998 (NAVD'88)
BASE FLOOD ELEVATIONS (NGVD '29) WERE OBTAINED FROM A 1982
FLOOD PLAIN STUDY BY THE ARMY CORPS OF ENGINEERS. THE 1982
STUDY IS SHOWN AS A BACKGROUND IN THIS SITE PLAN.
2. EXISTING SITE TOPOGRAPHY (NAVD '88) FROM A 2012 SURVEY BY
RIVER CITY CONSULTANTS.
3. ELEVATION DATUM CONVERSION FOR THIS SITE: NAVD'88=NGVD'29+3.6'.
4. BASE FLOOD ELEVATIONS (NAVD '88) WERE DETERMINED IN THE MAIN
RIVER CHANNEL BY DIRECT CONVERSION. BASE FLOOD ELEVATIONS
(NAVD '88) AND THE 100—YR FLOOD PLAIN LIMIT OVER THE SITE WERE
DETERMINED BY USING THE DATUM CONVERSION AND TAKING INTO
CONSIDERATION THE UPDATED SITE TOPOGRAPHY.
5. THE OFFICE TRAILER WILL BE SET ON A TEMPORARY FOUNDATION.
BOTTLED WATER WATER WILL BE BROUGHT IN AND PORT—A—POTTIES
WILL BE LOCATED OUTSIDE.
6. THE EXISTING GRADE AND APPROXIMTAE FINAL GRADE AT THE OFFICE IS
5012 (NAVD'88). THE 100—YEAR BASE FLOOD ELEVATION AT THE
OFFICE IS 5005.5 (NAVD'88). THE OFFICE WILL NOT BE
FLOOD—PROOFED.
7. THE ONLY EXISTING IMPERVIOUS AREA WITHIN THE SITE'S BOUNDARY IS
THE PAVEMENT FOR COUNTY ROAD 300, WHICH HAS A LENGTH OF
2300 FEET AND A WIDTH OF ABOUT 24 FEET FOR AND AREA OF 1.3
ACRES. NEW IMPERVIOUS AREAS WILL BE LIMITED TO THE PROPOSED
OFFICE TRAILER.
8. IRRIGATION WATER OR LATERALS ARE NOT LOCATED ON THIS SITE.
9. THE PROJECT DIES NOT PROPOSE TO ALTER THE COURSE OF THE
COLORADO RIVER.
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Rolland Consulting Engineers, LLC
405 Ridges Blvd. Suite A
Grand Junction, CO 81507
Voice: (970) 243-8300
Fax: (970) 241-1273
www.rcegj.com
ELAM CONSTRUCTION, INC.
5 VILE RANCH PIT
FLOODPLAIN DEVELOPMENT
SITE PLAN
Drawn
1
Designed ESS
Checked
Proj B9430
File Name: C:\PROJECTS\B9430 5 MILE PIT RCEbase.dwg
Rv: Sheet
Date 10/15/19 Of