B09_Amd8_-_Drawing_01-C4_42_Jan2026_0008.pdf
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- Solicitation number
- 140P2025R0082
About this file
This is a technical grading plan drawing for the Furnace Creek Wastewater Sewage Lagoon System, Cell #3, located within Death Valley National Park. The drawing, dated January 17, 2025, was designed and reviewed by V. Neary and M. Whelehon and is identified as drawing C4.42 within PMIS package 178069.
The plan specifies construction requirements for an unsealed pond lagoon cell with a pond bottom elevation of -246.10 feet, high water surface level at -242.10 feet, and dike top elevations at -238.10 feet. Key features include a 6-foot chainlink fence replacement, protection of an existing 8-inch ductile iron overflow pipe with an invert elevation of -240.38 feet, installation of a pond level gauge, riprap armoring around the dike perimeter, a 14-foot wide equipment entry area, an aerator with mooring mast, a walkway/gangway and floating dock system, and a proposed gravel edge. Construction requirements mandate scarification of the pond bottom to 12 inches depth for infiltration improvement, uniform grading with low-permeability fill in accordance with Section 31.23.00 Earthwork specifications, riprap armor installation per Section 31.37.00, and completion of work during dry pond conditions typically in summer or early fall. The plan includes detailed cross-sectional views showing slope ratios of 4:1, existing grade transitions, and water surface elevations that vary based on operational conditions.
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Text version
X
X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
-242 -240
-238
-2 .0
-2 .0
% -2 .0
-0 .7
-2 5.
0%
-1.0%
-1.1%
-1.2%
-0.9%
-1.2%
-1.0%
-245 -244
-243
-241 -240
-239
-239
-240
-2
-246 -245
-244 -243
-242 -241
-2
-2
-2
-2
-2
-240 -239
-239
-239 -241
-240
-239 -240
-242
-2
-2
-25.0%
-243
-244
-239
-2
-2
-238
-2 .0
-25.0% -25.0%
-2 .0
-25.0%
-2 .0
-1 .0
-1.0%
-239
-2
-240 -239
-240-241
-241
-2
-2
-250
-240
-230
-250
-240
-230
1+20 1+40 1+60 1+80 2+00 2+20 2+40 2+60 2+80 3+00 3+20 3+40 3+60 3+80 4+00 4+20 4+40 4+60 4+80 5+00 5+20 5+40 5+60 5+80 6+00 6+20 6+40 6+606+70
-250
-240
-230
-250
-240
-230
1+20 1+40 1+60 1+80 2+00 2+20 2+40 2+60 2+80 3+00 3+20 3+40 3+603+70
DATE:
DESIGNED:
TECH. REVIEW:
SUB SHEET NO.
PMIS/PKG NO.
DRAWING NO.
SHEET
OF
TITLE OF SHEET
FURNACE CREEK WASTEWATER
SEWAGE LAGOON SYSTEM
CELL #3 GRADING PLAN
178069
219 513
V. NEARY
V. NEARY
M. WHELEHON
1.17.2025
DEATH VALLEY
NATIONAL PARK
318717 01-
C4.42
HORIZ.
VERT.
20 0 20 40
SCALE OF FEET
50 0 10 20
EXISTING LAGOON CELL #3 REHABILITATION NOTES
1. SCARIFY POND BOTTOM TO A DEPTH OF 12" TO IMPROVE INFILTRATION.
2. REGRADE CELL TO PROVIDE A UNIFORMLY GRADED SLOPE WITH LOW PERMEABILITY FILL IN ACCORDANCE WITH SECTION 31 23 00 "EARTHWORK", PARAGRAPH 3.6.
3. PROVIDE RIPRAP ARMORING FROM TOE TO TOP OF DIKE AROUND ENTIRETY OF CELL. SEE DETAIL E/C7.7 AND SECTION 31 37 00 "LAGOON RIPRAP"
4. SLOPE AROUND ENTIRETY OF CELL FRONT SLOPE AND BACK SLOPE OF ACCESS ROAD SHALL BE 4:1.
5. WORK SHALL OCCUR WHEN POND IS DRY, TYPICALLY DURING SUMMER OR EARLY FALL.
6. PUMPING WATER FROM CELL #3 TO OTHER CELLS IS ALLOWED TO INCREASE THE EVAPORATION OF CELL #3. FILL SHALL BE MIXED AND PLACED IN ACCORDANCE WITH SECTION 31 23 00 "EARTHWORK", PARAGRAPH 3.6
7. SEE SHEET C4.38 FOR SOIL QUARRY AND STOCKPILE BOUNDARIES.
LAGOON CELL #3 PLAN
LAGOON CELL #3 - UNSEALED
POND BOTTOM
ELEV: -246.10
HIGH WATER SURFACE LEVEL
ELEV: -242.10
TOP BACK OF DIKE
ELEV: -238.10
TOP FRONT OF DIKE
ELEV: -238.10
REMOVE AND REPLACE
6-FT CHAINLINK FENCE
EXISTING 8-INCH DUCTILE IRON OVERFLOW
PIPE PROTECT IN PLACE
INSTALL POND LEVEL GAUGE
POND BOTTOM: -246.10'
WATER SURFACE
ELEV: VARIES
TOP BACK OF DIKE
ELEV: VARIESTOP FRONT OF DIKE
ELEV: -238.10
TOP OF DIKE
MIN. 12' WIDTH
EXISTING GRADE
FINISH GRADE
EXISTING EDGE OF ROAD
4:1 SLOPE
4:1 SLOPE
SECTION A-A'
A'A
SECTION B-B'
WATER SURFACE
ELEV: VARIES
POND BOTTOM: -246.10'
TOP OF DIKE
MIN. 12' WIDTH, TYP.
EXISTING GRADE4:1 SLOPE
TOP BACK OF DIKE
ELEV: VARIES TOP FRONT OF DIKE
ELEV: -238.10
FINISH GRADE
4:1 SLOPE
EXISTING 8-INCH DUCTILE IRON
OVERFLOW PIPE PROTECT IN PLACE
RIPRAP ARMOR
RIPRAP ARMOR, TYP.
B'
B
LAGOON DISTURBANCE
LIMITS
EXISTING OVERFLOW PIPE
INVERT ELEV: -240.38
WALKWAY, GANGWAY
AND FLOATING DOCK
C C7.7
C C7.13
E C7.7
PROPOSED EDGE
OF GRAVEL
EDGE OF DIKE
BACK SLOPE FILL
14' WIDE EQUIPMENT ENTRY AREA
DO NOT INSTALL RIP RAP
E C7.7
AERATOR MOORING MAST, TYP. D
C7.2
AutoCAD SHX Text 1/8/25 15:46 TYLER.FRANCIS F:\7194.05 DEVA WATER AND WASTEWATER SYSTEM REHAB\DRAWINGS\DWG\CIVIL\5 SHEET PRODUCTION\4_DEVA FC WW_GRADING
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