25-06-53-01 - Plans.pdf
PDF 10 MB Posted
- Solicitation number
- 25-06-53-01
- Issued by
- Jasper County, Iowa
About this file
This document is a set of engineering plans prepared by Endeavor Civil Engineering Inc. for the Iowa Department of Natural Resources septic mound system project at Wapsipinicon State Park in Jones County, Iowa. The project involves the demolition of an existing septic system and installation of a new mound-based wastewater treatment system. Key project components include installing a 2,000-gallon septic tank, a 1,000-gallon dosing chamber with pump, 290 feet of 2-inch diameter force main pipe, seven distribution trenches measuring 2 feet wide by 75 feet long spaced 4 feet apart, and associated site work including removal of the existing septic tank and installation of sewer service lines. The mound system measures 156 feet by 32 feet and will be constructed with sand fill material, synthetic drainage fabric, and a topsoil cap. The project location is within the park near an existing restroom facility, with specific considerations for maintaining 100-foot separation from a private irrigation well and minimal disturbance to golf course operations. Bid closing is scheduled for August 27, 2026 at 3:00 PM, with electronic submission required.
The plans specify material requirements compliant with Iowa Code Chapter 69, including detailed cross-sectional specifications for distribution trenches with gravel placement at minimum 6 inches below and 2 inches above distribution pipes. All disturbed areas must be hydroseeded and fertilized with native topsoil blended into existing hillside slopes. Site-specific requirements include cutting a gap in existing cable fencing to provide improved access from the golf course and installing matching posts to maintain fencing integrity. Cleanout locations on distribution runs must be installed flush with ground surface with threaded caps and green lids suitable for golf course mowing operations to minimize operational disruption.
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Other files
| File | Type | Posted |
|---|---|---|
| 25-06-53-01 - Bid Package.pdf |
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Text version
IOWA DEPARTMENT OF
NATURAL RESOURCES
SEPTIC MOUND SYSTEM
S E
P T
IC
M
O U
N D
S Y
ST
E
M
IO
W A
D E
P A
R T
M E
N T
O F
N A
T U
R A
L R
E S
O U
R C
E S
IOWA
ONE CALL
800 / 292-8989
TOLL FREE
CALL - BEFORE - YOU - DIG
I hereby certify that this engineering document was prepared by me or under my direct supervision and that I am a duly licensed Professional Engineer under the laws of the State of Iowa.
ENDEAVOR CIVIL ENGINEERING INC.
1 TITLE SHEET
2 ESTIMATE OF QUANTITIES AND GENERAL NOTES
3 MISCELLANEOUS NOTES AND SPECIFICATIONS
4 SITE LOCATION
5 SITE PLAN VIEW
6 MOUND SYSTEM LAYOUT AND DETAILS
SH
AW
RD
228 A V
E
GRANT WOOD RD
120 ST
SLIDE ROCK RD
150 ST
138 ST
A V
E
C O
R D
E
SLIDE ROCK RD
SHOOTING STAR RD
150 ST
FOREST
CHAPEL RD
205 AVE
D
EA
R B
O
RN
R D
STONECITY RD
ANAMOSA
F A I R V I E W
CO HOME RD E23
RID
G
E RD E28
ST
O
NE C
ITY
R D X
‒‒0
8/11/2026
Mike Typewritten Text Michael Dufoe, P.E.
Mike Typewritten Text Bruce Flippin, P.E.
REF.# DESCRIPTION
Endeavor Civil Engineering
GENERAL NOTES
Mike Text Box
See Attachment B as part of Contract and Proposal Bid Documents for Quantity Information
SEPTIC TANK
DOSING CHAMBER
MOUND FILL MATERIAL
MOUND GRAVEL MATERIAL
PROJECT LOCATION WITHIN PARK
WAPSIPINICON STATE PARK
INSTALL 2,000 GALLON
SEPTIC TANK
INSTALL 1,000 GALLON
DOSING CHAMBER
WITH PUMP
EXISTING RESTROOM
FACILITY
PROPOSED MOUND SYSTEM LOCATION
DIMENSIONS: 156.0' x 32.0'
(SEE SHEET 6 FOR ADDITIONAL DETAILS)
INSTALL 290 FEET OF 2" DIA. SDR 26 OR STRONGER
SANITARY SEWER FORCE MAIN PIPE, BORE PIPE IN
AREAS OUTSIDE OF MOUND WHERE POSSIBLE TO
MINIMIZE DISTURBANCE. PIPE SHALL ALSO HAVE A
POSITIVE SLOPE TO IT TO ALLOW EFFLUENT TO
BACKFLOW INTO DOSING CHAMBER BETWEEN
PUMPINGS
REMOVE EXISTING
SEPTIC TANK
75' LONG RUNS OF 1" DIAMETER
SDR26 IN 2 FOOT TRENCHES (SEE
SHEET 6 FOR ADDITIONAL DETAILS)
INSTALL 15 FEET OF 4" DIA. SDR 26
OR STRONGER SEWER SERVICE AT
A MIN. 1% SLOPE
MAINTAIN MINIMUM OF 10 FOOT
SEPARATION BETWEEN EDGE OF
MOUND SYSTEM AND WATER
IRRIGATION LINE
INSTALL 5 FEET OF 4" DIA. SDR 26
OR STRONGER SEWER SERVICE AT
A MIN. 1% SLOPE
783 785
HYDROSEED, AND FERTILIZE OVER ALL
DISTURBED AREAS.
BLEND TOP SOIL COVER INTO
EXISTING HILL SIDE SURROUNDING
MOUND SYSTEM DISTRIBUTION
AREA
IRRIGATION LINE
IRRIGATION LINE
IRRIGATION LINE
IR
RI
GAT
IO
N LI
NE
PRIVATE IRRIGATION WELL
EDGE OF MOUND AREA IS 101' AWAY FROM
IRRIGATION WELL. MAINTAIN MINIMUM
100' SEPARATION DURING CONSTRUCTION
CONTRACTOR TO CUT GAP IN EXISTING CABLE FENCE AT
LOCATION DETERMINED SUITABLE BY THE DNR TO
PROVIDE BETTER ACCESS TO RESTROOM FACILITY FROM
THE GOLF COURSE. A NEW POST MATCHING THE
EXISTING POSTS SHALL BE INSTALLED 3.5' FROM AN
EXISTING POST IN THE GAP TO RE-ATTACH THE CABLE TO
FOR PEDESTRIAN ACCESS.
Mike Polygonal Line
Mike Typewritten Text
SENSATIVE AREA
AVOID
CAP SYSTEM WITH 12
INCHES OF TOP SOIL
BLEND ENDS OF
TOPSOIL LAYER INTO
EXISTING HILL SLOPE
SAND FILL MATERIAL
LAYER: 2.25' THICK
2' WIDE DISTRIBUTION
TRENCHES
RESTRICTIVE LAYER
PLOWED SURFACE
SHAPE ENDS TO AT
LEAST 3:1 SLOPE
1" DIA. DISTRIBUTION PIPE
4 FOOT SPACING OF
DISTRIBUTION TRENCHES
PLACE SYNTHETIC
DRAINAGE FABRIC OVER
DISTRIBUTION TRENCHES
SECTION A-A (TYPICAL SECTION)
NOTES:
GRAVEL IN DISTRIBUTION TRENCHES SHALL BE PLACED A MINIMUM OF 6 INCHES
BELOW THE DISTRIBUTION PIPE, AND A MINIMUM OF 2 INCHES ABOVE THE
DISTRIBUTION PIPE.
MATERIAL UTILIZED IN DISTRIBUTION TRENCHES SHALL COMPLY WITH SPECS AS
OUTLINED IN SHEET 3 OF THESE PLANS AND CHAPTER 69 OF IOWA CODE.
FILL SAND UTILIZED SHALL COMPLY WITH MATERIAL SPECS FOUND ON SHEET 3 OF
THESE PLANS, AND CHAPTER 69 OF IOWA CODE.
AREA OF MOUND SYSTEM SHALL BE STRIPPED OF VEGETATION BEFORE
CONSTRUCTION WITH THE TOP LAYER BEING PLOWED TO A DEPTH OF 8 INCHES.
TOP SOIL UTILIZED SHALL CONSIST OF QUALITY NATIVE SOIL FROM THE AREA
HAULED IN BY CONTRACTOR
CLEANOUTS ON ENDS OF DISTRIBUTION RUNS SHALL BE INSTALLED FLUSH WITH THE
GROUND SURFACE TO PROVIDE MINIMAL DISTURBANCE TO THE GOLF COURSE.
CAPS SHALL HAVE A THREADED CAP WITH GREEN LID SUITABLE FOR GOLF COURSE
MOWING OPERATIONS TO PROVIDE MINIMAL DISTURBANCE TO NORMAL
OPERATIONS.
A
A
7 DISTRIBUTION TRENCHES,
2 FOOT WIDE BY 75 FEET
LONG SPACED AT 4'-0"
MAINTAIN MINIMUM 3' OF
SEPARATION BETWEEN EDGE OF
TRENCHES AND EDGE OF
MOUND SYSTEM
ANGLE END OF DISTRIBUTION PIPE
UPWARDS, AND PLACE CLEANOUTS FLUSH
WITH NEW GROUND SURFACE (TYP.)
2" DIA. CENTERAL
FORCE MAIN
MOUND DISTRIBUTION SYSTEM PLAN VIEW
ANGLE END OF DISTRIBUTION
PIPE UPWARDS, AND PLACE
CLEANOUTS FLUSH WITH NEW
GROUND SURFACE (TYP.)
MINIMUM 36 INCH SEPARATION
BETWEEN BOTTOM OF GRAVEL AND
RESTRICTIVE LAYER
IRRIGATION LINE
7 DISTRIBUTION TRENCHES, 2
FOOT WIDE BY 75 FEET LONG
SPACED AT 4'-0"
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