HomeMy WebLinkAboutEngineer's Report 12.23.2016CIVCO Engineering, Inc.
Civil Engineering Consultants
P.O. Box 1758
365 West 50 North, Suite W-1
Vernal, Utah 84078
December 23, 2016
David Mahovski
Clayton Homes
671 23 Road
Grand Junction, CO 81505
Dear David,
Subject Wastewater Disposal System - Shiles at TBD Seneca, Silt, CO
I am writing to certify that I have visually inspected the Shiles on-site wastewater treatment system at
TBD Seneca, Silt, Colorado and find it to be in accordance with the accompanying calculations and
construction drawings (dated 12/22/16) that I developed.
If you have any questions or require additional assistance regarding this project, please let me know.
Sincerely,
Vance V. King,
Engineer
CIVCO Engineering, Inc.
VVK/vvk
Cc: Project File
Phone (435)789-5448 * Fax (435)789-4485
Email: vanceking@civcoengineering.com
Design Calculations
For
Shiles Residence
TBD Seneca, Silt, Colorado
On-site Wastewater Treatment System
December 22, 2016
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CIVCO Engineering Inc
Civil Engineering Consultants
Vernal, Utah
1256 W. 400 S. Office: 435-789-5448
P.O. Box 1758 Fax: 435-789-4485
Vernal, UT 84078 www.civcoengineering.com
CIVCO Engineering, Inc.
PO Box 1758, Vernal, UT, 84078
Ph: (435)789-5448
Fx: (435)789-4485
Given:
Single Family Residence:
Perk test data :
Shiles Residence
TBD Seneca, Silt, CO
Waste Water Disposal System
Nbed := 3
Page 1 of 4
By: V King
10/19/2016
Meas.
Time
Minutes
Elapsed
Test Hole 1
Test Hole 2
Test Hole 3
Water Level
Drop (in.)
Perk Rate
(Mh.%In.)
Water I evel
Drop (n.)
Perk Rate
f1vin./In.)
Water Level
Crop (in)
Perk Rate
(Nin./In.)
14:00
14:15
15.00
1
15.00
0.25
60.00
1
15.00
14:30
15.00
0.5
30.00
0.25
60.00
1
15.00
14:45
15.00
1
15.00
0.25
60.00
1
15.00
15:00
15.00_
0.5
30.00
0.25
60.00
0.5
30.00.
Hole Perk Rate: 30.00 60.00 30.00
Ave Perk Rate 40.00
terve = 40 min
in
Req'd:
Septic System Design
SoI'n:
Septic Tank
Tank Total Volume
Vtank
if Nbed < 3
11( 1000 -gal
else
(1000.gal + (Nbed — 3) • 250.gal)
=1000 gal [Table 9-1]
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CIVCO Engineering, Inc.
PO Box 1758, Vernal, UT, 84078
Ph: (435)789-5448
Fx: (435)789-4485
Shiles Residence Page 2 of 4
TBD Seneca, Silt, CO By: V King
Waste Water Disposal System 10/19/2016
lst Compartment Volume
Vtank
Vist_comp:=2 — 500 gal
Absorption Area
Maximum Daily Flow
Q :=
if Nbed < 2
300 9�
day
else if Nbed = 3
450 gal
day
else if Nbed > 3
450 gal + /Nbed 3) 75 gal
day ` da
Long Term Acceptance Rate (LTAR)
Park Rate
t:= take = 40 min
in
Soil Type: 2A
gal
LTAR := 0.5 day
ft2
Initial Soil Treatment Area
STA:—LTAR
=900 ft
[43.9.B.4.a]
= 450 gal [Table 6-1]
day
[Table 10-1]
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CIVCO Engineering, Inc.
PO Box 1758, Vernal, UT, 84078
Ph: (435)789-5448
Fx: (435)789-4485
Shiles Residence Page 3 of 4
TBD Seneca, Silt, CO By: V King
Waste Water Disposal System 10/19/2016
Soil Treatment Area for Trenched Chambers
Application Method Size Adustment Factor
SAFAM:=1.0 (Gravity)
Distribution Media Size Adustment Factor
SAFDM:=0.7 (Chambers)
Combined Size Adustment Factor
SAF:= if SAFAm • SAFDM> 0.51= 0.7
SAFAM • SAFDM
else
II 0.5
STATc := STA • SAF = 630 ft 2
[Table 10-2]
[Table 10-3]
[Sec 43.10.D.3]
Chamber Length
Only the open bottom area applies. [Sec 43.10.C.1]
Chamber bottom Width Be: =34 in (Biodiffusers & Quick4 Units)
STA 'rc:•
Required overall length of trenched chambers LTc:= =222.353 ft
lig
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CIVCO Engineering,
PO Box 1758, Vernal, UT,
Ph: (435)789-5448
Fx: (435)789-4485
Inc. Shiles Residence
84078 TBD Seneca, Silt, CO
Waste Water Disposal System
Soil Treatment Area for Bedded Chambers
Application Method Size Adustment Factor
SAFAM:=1.2 (Gravity)
Distribution Media Size Adustment Factor
SAFDM:=0.7 (Chambers)
Combined Size Adustment Factor
SAF := if SAFAM • SAFDM > 0.5 =0.84
SAFAM • SAFDM
else
110.5
STABC:=STA•SAF=756 ft2
Chamber Length
Only the open bottom area applies.
Page 4 of 4
By: V King
10/19/2016
[Table 10-2]
[Table 10-3]
[Sec 43.10.D.3]
[Sec 43.10.C.1]
Chamber bottom Width Bc=34 in (Biodiffusers & Quick4 Units)
Required overall length of bedded chambers LBC:= STABC =266.824 ft
B,
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Project:
TBD Seneca
Silt, Colorado
Designer:
VANCE V KING, PE
Issue Date:
DECEMBER 22,2016
P 0, Box 1758, Vernal, Utah 84078
Telephone: (435)789-5448 Fax: (435)789-4485
www cwcoengineeri nn.com