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DEPARTl IT OF PLANNING SERVICES
H PHONE(303)356-4000 EXT.4400
915 10th STREET
GREELEY,COLORADO 80631
COLORADO
November 9, 1988
Mr. Tom Cope, P.E.
Total Engineering Service
4415 West 9th Street
Greeley, CO 80634
Dear Mr. Cope:
Thank you for your letter of October 14. It was determined by the Board of
County Commissioners that your request was not a material deviation from the
plans or Development Standards approved for Special Use Permit 454:80:44.
The Board has requested that Mr. Duckworth:
1 . Limit the water intake at the facility until the repair and
reconstruction of ponds C and D is completed and the facility
is in compliance with the approved Special Use Permit plans
and Development Standards;
2. Obtain a grading permit before construction of the berming on
pond D begins; and
3. Install aeration facilities on pond C to facilitate
evaporation as soon as possible.
If you have any questions, please feel free to call or write.
Sincerely,
Chuck Cunliffe
Director
CC:rg
pc Howard Duckwcrth
Board of County Commissioners
Wes Potter, Director, Health Protection Services
%UP-454:80:44 Case File
881155
E. I ' 1, ''
feiii‘l, . _ x '' Chuck Cunliffe, Director
WilDepartment of Planning November 1, 1988
To Datc
• Wes Potter, Director, Health Protection Services WeAVALnillgij
COLORADO From t1JA
Weld County Disposal Pond D Berm Proposal l-O jUL rodeo
Subject:
The staff has evaluated the proposal from Tom Cope, Professional Engineer for
Weld County Disposal to raise the elevation of the earth berm around Pond D at
the disposal. While we are opposed to any significant change in the pond size
and depth, it has been noted that the proposed change will not increase the
total area of the pond. The depth of the liquid in Pond C is approximately 10
feet and the total depth of the liquid in Pond D will be the same if the berms
are raised by four feet. Tom indicated that this increase in capacity will
improve their ability to work on the berms on Pond C, because they intend to
drain some of the liquid from Pond C to Pond D after the berms are completed
to facilitate repair work on the Pond C liners.
With the above considerations in mind, we recommend for approval of the
request to raise the berms on Pond D by four feet. The work must be
supervised by a registered professional engineer and the final construction
certified by the same engineer. We request that you evaluate the proposal to
determine whether it would be considered a substantial change to their special
use permit and whether your staff would approve of the proposal.
WP/dgc
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fl\ wov 1 1988
*did i;u v+`11oi,_. t.;i,;,pNC-PAIL
Total Engineering Service
c 4415 W. 9th Street
.12kGreeley, CO 80634
(303) 351 -8744
October 27, 1908
Mr. Wes Potter
Weld County Health Department
1516 Hospital Road
Greeley, CO 80632 0CT 2 7 1988
Re: Weld County Disposal
Dear Wes:
This letter provides my findings of the field investigation conducted
October 26, 1988 for the above-referenced project. Pond D was probed to
determine the maximum pool depth. You requested this information to
allow your staff to determine the effects of the proposed raising of the
berm by four feet.
Pond D was found to contain a maximum pool depth of six feet (6') when a
three foot (3') freeboard is maintained. The raising of the berm as proposed
will increase the maximum pool depth to ten feet (10'). This depth is
considered adequate for an evaporation lagoon. The additional depth will
still allow proper thermal conductivity for efficient evaporation. The
sprayers will assist in any odor control during the seasonal turning of the
lakes.
We would like to request your timely review on this matter. The owners
intent is to make the necessary repairs and expansion this fall prior to the
weather change and the Show Cause Hearing on November 14, 1988.
Please feel free to contact me if you have any questions concerning this
matter.
Sincerely,
rem 4-r.e
Tom Cope, P.E.
cc: File *88-128
Howard Duckworth
Keith Schuett, Weld County Planning Services
Total Engineering Service
4415 W. 9th Street
Greeley, CO 80634
(303) 351 -8744
'7i,tnber 14, 1960 — -- -
IJ
Mr. Keith Schuett (AI c. ;
;
;
Weld County r`��
Planning Department
915 10th Street
Greeley, CO 80631
Re: Weld County Disposal
Dear Keith:
I have been retained by Mr. Howard Duckworth, owner of the Weld County
Disposal, to assist in the repairs of the facility to meet the Development
Standards as stated in SUP-454:80:44.
On October 11, 1900 I surveyed the water surface of Ponds C 8c D to
determine the actual water surface area that exists on these ponds. The
following information was determined from that survey:
Allowed Area Determined Area
Pond A 1.9 Acres 0.0 Acres
Pond 6 1.9 Acres 0 0 Acres
Pond C 8.2 Acres 5.8 Acres
Pond D 5.4 Acres 6.0 Acres
TOTAL 1 7.4 Acres 11.8 Acres
Ponds A & 6 are no longer used for disposal of liquid brine water, since Weld
County Health Department suspected the integrity of the liners. That
surface area for evaporation purposes has been lost, although the Standard
Development did allow nearly four acres of evaporation surface area in the
original Special Use Permit. An additional 1.8 acres of evaporation surface
area is also being lost in Ponds C & D from the Development Standards as
set forth in the SUP.
S. S.
cc Total Engineering Service
C 4415 W. 9th Street
Greeley, CO 80634
(303) 351 -8744
Mr. Keith Schuett
October 14, 1988
Page Two
Ponds C & D have been a concern to Weld County Health Department as well
as the County Commissioners, due to the wave action causing erosion in the
berms. The operator of the facility would like to repair and reconstruct the
upper portion of the berms in Pond C to meet a three to one slope, therefore
minimizing the potential for erosion. The operator would also like to level
the elevation of the berm on Pond C while the earthrnoving equipment is on
site. The operator does not intend to significantly raise the berm to Pond C,
since the existing water depth is sufficiently deep enough while still
allowing proper thermal conductivity for efficient evaporation.
The operator would like to raise the berm on Pond D by four feet. The
increase of the berm elevation on a three to one slope would increase the
surface area of Pond D. However, the total surface area of the ponds would
still be considerable less than the total allowed surface area as shown in
the Development Standards. The increase of the berm is needed to allow the
proper needed repair to both ponds and is not anticipated to be a detriment
to the effectiveness of the thermal properties in pond D, since this pond is a
very shallow pond
The repair and reconstruction of the berms would be constructed in
conformance to the Development Standards. To prevent seepage to the
groundwater, the slope of the ponds will be lined with bentonite or other
impervious material similar to the construction of the existing liners. See
Exhibit 1, for the proposed typical cross section. The berms and liners will
be required to meet ninety-five percent (952) Standard Proctor compaction.
A geotechnical engineer or other professional engineer familiar with soils
will be required on site during the placement of the liner to ensure the
consistency of any liner material used.
The operator would like to complete the repairs and reconstruction to Ponds
C & D as soon as possible. Ideally, the proposed work should be completed
by the November Show-Cause Hearing. The operator is proposing to
commence work on approximately October 24, 1988.
SO ell
z Total Engineering Service
e Al&► 4415 W. 9th Street
Greeley, CO 80634
(303) 351 -8744
Mr. Keith Schuett
October 14, 1988
Page Three
I do not anticipate the County intervening on the proposed work since the
work is not a change to the Development Standards. The proposed work will
minimize the wave action erosion that has occurred in the past, will provide
for two lined ponds, and will not increase the total evaporation surface area
of the facility.
Please feel free to contact me if you have any questions concerning this
matter.
Sincerely,
-fin dpe
Tom Cope, P.E.
cc: Wes Potter, Weld County Health Department
Howard Duckworth
File *88- 128
PROPOSED BERM
3 ' MINIMUM 3'
FREEBOARD
IMPERVIOUS . PROPOSED WATER
LAYER-MIN.
5 4'
WATER
�EXISTING BERM----
NOTES: ALL SOILS TO BE COMPACTED
TO 95% STANDARD PROCTOR
PROPOSED LINER TO MATCH
EXISTING LINER
POND CROSS SECTION
WELD COUNTY DISPOSAL
tr_c Total Engineering Service SCALE: NONE
A tli&
4415 W. 9th Street PROJ. NO: 88-128
~'( Greeley, CO 80634 DATE: 10/14/88
/88
(303) 351-8744
EXHIBIT-NO: 1
4110 DEPAR•NT OF PLANNING SERVICES
• s ,�t� � PHONE(303)356.4000 EXT.4400
I` 915 10th STREET
pf r• Alm GREELEY,COLORADO 80631
wiipc,
COLORADO
October 20, 1988
Total Engineering Service
Attn: Tom Cope, P.E.
4415 West 9th Street
Greeley, CO 80634
Re: Weld County Disposal (SUP-454:80:44) , located in part of the NWI NWi of
Section 12, T1N, R66W of the 6th P.M. , Weld County, Colorado.
Dear Mr. Cope
Thank you for your letter received on October 17th. The Department of
Planning Services' staff is waiting on additional information from Wes
Potter, Director of Weld County Health Protection Services. When this
information is received the staff will be able to complete its review. No
work is to be started until the planning staff has completed its review of
this proposal, and the required building permits have been issued.
If you have any questions, please call or write.
Sincerely,
eith A. Schuet
Current Planner
KAS:rjg
pc: Wes Potter, Director of Weld County Health Protection Services
itt Total Engineering Service
4415 W. 9th Street
Greeley, CO 80634
(303) 351 -8744
October 14, 1988 C - _.
Mr. Keith Schuett ` OCT 1 7 1988
Weld County
Planning Department Weld Cu. Planning COMM&
915 10th Street
Greeley, CO 80631
Re: Weld County Disposal
Dear Keith:
I have been retained by Mr. Howard Duckworth, owner of the Weld County
Disposal, to assist in the repairs of the facility to meet the Development
Standards as stated in SUP-454:80:44.
On October 11, 1988 I surveyed the water surface of Ponds C & D to
determine the actual water surface area that exists on these ponds. The
following information was determined from that survey:
Allowed Area Determined Area
Pond A 1.9 Acres 0.0 Acres
Pond 0 1.9 Acres 0.0 Acres
Pond C 8.2 Acres 5.8 Acres
Pond D 5.4 Acres 6.0 Acres
TOTAL 17.4 Acres 11.8 Acres
Ponds A & 0 are no longer used for disposal of liquid brine water, since Weld
County Health Department suspected the integrity of the liners. That
surface area for evaporation purposes has been lost, although the Standard
Development did allow nearly four acres of evaporation surface area in the
original Special Use Permit. An additional 1.8 acres of evaporation surface
area is also being lost in Ponds C & D from the Development Standards as
set forth in the SUP.
Total Engineering Service
A0wk 4415 W. 9th Street
Greeley, CO 80634
(303) 351 -8744
Mr. Keith Schuett
October 14, 1988
Page Two
Ponds C & D have been a concern to Weld County Health Department as well
as the County Commissioners, due to the wave action causing erosion in the
berms. The operator of the facility would like to repair and reconstruct the
upper portion of the berms in Pond C to meet a three to one slope, therefore
minimizing the potential for erosion. The operator would also like to level
the elevation of the berm on Pond C while the earthmoving equipment is on
site. The operator does not intend to significantly raise the berm to Pond C,
since the existing water depth is sufficiently deep enough while still
allowing proper thermal conductivity for efficient evaporation.
The operator would like to raise the berm on Pond D by four feet. The
increase of the berm elevation on a three to one slope would increase the
surface area of Pond D. However, the total surface area of the ponds would
still be considerable less than the total allowed surface area as shown in
the Development Standards. The increase of the berm is needed to allow the
proper needed repair to both ponds and is not anticipated to be a detriment
to the effectiveness of the thermal properties in pond D, since this pond is a
very shallow pond.
The repair and reconstruction of the berms would be constructed in
conformance to the Development Standards. To prevent seepage to the
groundwater, the slope of the ponds will be lined with bentonite or other
impervious material similar to the construction of the existing liners. See
Exhibit 1, for the proposed typical cross section. The berms and liners will
be required to meet ninety-five percent (95%) Standard Proctor compaction.
A geotechnical engineer or other professional engineer familiar with soils
will be required on site during the placement of the liner to ensure the
consistency of any liner material used.
The operator would like to complete the repairs and reconstruction to Ponds
C & D as soon as possible. Ideally, the proposed work should be completed
by the November Show-Cause Hearing. The operator is proposing to
commence work on approximately October 24, 1988.
• • �
Total Engineering Service
e 4415 W. 9th Street
Greeley, CO 80634
(303) 351 -8744
Mr. Keith Schuett
October 14, 1988
Page Three
I do not anticipate the County intervening on the proposed work since the
work is not a change to the Development Standards. The proposed work will
minimize the wave action erosion that has occurred in the past, will provide
for two lined ponds, and will not increase the total evaporation surface area
of the facility.
Please feel free to contact me if you have any questions concerning this
matter.
Sincerely,
7-9-;;1 44€
Tom Cope, P.E.
cc: Wes Potter, Weld County Health Department
Howard Duckworth
File *80-128
4
c PROPOSED BERM
3 MINIMUM 3'
FREEBOARD
I' IMPERVIOUS PROPOSED WATER
LAYER-MIN. 4'
5
WATER
EXISTING BERM
NOTES: ALL SOILS TO BE COMPACTED
TO 95% STANDARD PROCTOR
PROPOSED LINER TO MATCH
EXISTING LINER
POND CROSS SECTION
WELD COUNTY DISPOSAL
Total Engineering Service SCALE; NONE
: ' 4415 W. 9th Street Greeley, PROJ. NO: 88-128
CO 80634 DATE; 10/14 /88
(303) 351-8744
EXHIBIT.NO: I
I
• DEPARTMEN1 . PLANNING SERVICES
PHONE(303)356.4000 EXT.4400
a: 915 10th STREET
GREELEY,COLORADO 80631
\ 41PR
•
4. •
COLORADO
September 1, 1988
Weld County Disposal, Incorporated
c/o Mr. Howard Duckworth
7551 Callaghan Road, Suite 100
San Antonio, TX 78229
Re: ZCH-34 located in part of the NWT NW% of Section 12, T1N, R66W of the
6th P.M. Weld County, Colorado.
Dear Mr. Duckworth,
The Department of Planning Services' staff has reviewed your request to
install an aeration system to pond "C" and revision of the aeration system
for pond "D" at the Weld County Disposal site. It was determined that the
installation, operation, and revisions of the aeration systems would not be
considered a major change to the approved Special Review permit #454
provided that the aeration systems are constructed in accordance with the
plans submitted and operated in compliance with Wes Potter's letter of May
31, 1988. Appropriate building permits for the aeration systems must be
obtained.
If you have any questions, please call or write.
Sincerely,
Keit .
Current Planner
KAS:dn
cc: Wes Potter, Director of Environmental Health Protection Services
Cecil Crowe, Alpha Engineering
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