HomeMy WebLinkAbout2006-11-21; Municipal Water District; 623; Lake Calavera Remedial ImprovementsCARLSBAD MUNICIPAL WATER DISTRICT - AGENDA BILL
AB#
MTG. 11/21/06
DEPT. ENG
AUTHORIZATION TO ADVERTISE FOR BIDS
FOR LAKE CALAVERA REMEDIAL IMPROVEMENTS
PROJECT NO. 38211
DEPT. HEAD
CITY ATTY.
CITY MGR.
RECOMMENDED ACTION:
Adopt Resolution No. 1283 approving plans and specifications and authorizing the
District Secretary to the Board to advertise for bids for Lake Calavera Remedial Improvements,
Project No. 38211.
ITEM EXPLANATION:
The Calavera Dam is an earth-fill dam that impounds waters from the Calavera Creek watershed to
form the Lake Calavera reservoir. At present, the Calavera Dam's outlet works are inoperable and are
in need of remedial improvements. The Lake Calavera Remedial Improvements Project will restore
operational control of the dam and make necessary remedial facility repairs while modernizing the
reservoir operations.
The plans and specifications for the Lake Calavera Remedial Improvements have been completed
and include the following improvements:
• Removal of the upper 26-feet of the existing outlet control tower and replacement with an
outlet valve system placed upon the lakeside face of the dam
• Slip-lining repair to the outlet pipe underneath the dam
• Construction of an on-site control building
• Improvements to the spillway apron and channel
• Extension of a small access road to the spillway apron
• Improvements to the dam crest for maintenance crew access
As part of the project, the upper twenty-six feet of the outlet control tower will be removed and
replaced with an outlet control system that is placed upon the lakeside face of the dam.
The inoperable manually-operated control system will be replaced with a dual action hydraulically and
pneumatically-controlled outlet valve control system. This redundancy is required to ensure a safe
and reliable operational control of the valves. The valve controls will be housed within the newly
constructed on-site control building.
During the environmental permitting process, a number of project changes were required, and have
been incorporated into the improvement project. Among the significant design changes included is the
use of: ArmorFlex block within the spillway channel; colored concrete at the spillway channel and
apron; motion-sensor control building security lighting; and a construction method that does not
require a significant water level draw down to facilitate replacement of the inoperable valves. The use
of the ArmorFlex block within the spillway channel is an environmental benefit since the block has an
opening that allows for plant growth and water infiltration.
FOR CITY CLERKS USE ONL Y. /
BOARD ACTION: APPROVED S, CONTINUED TO DATE SPECIFIC D
DENIED D CONTINUED TO DATE UNKNOWN D
CONTINUED D RETURNED TO STAFF D
WITHDRAWN D OTHER - SEE MINUTES D
AMENDED D
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ENVIRONMENTAL IMPACT:
The Planning Commission adopted a Mitigated Negative Declaration, and approved a Conditional Use
Permit (CUP 04-11) and a Habitat Management Plan Permit (HMPP 05-03) on January 18, 2006 by
Planning Commission Resolution Nos. 5890, 5891, and 5892, respectively.
On January 23, 2006, an appellant filed a timely request for appeal of the HMPP for the project to the
City Council. On January 27, 2006, the appellant amended the appeal form on file with the City Clerk.
The appeal was denied by the City Council on April 18, 2006, thereby upholding the Planning
Commission's decision to approve the HMPP by City Council Resolution No. 2006-101.
In addition to these environmental documents, the following additional permits have been acquired for
construction of the project:
1. California Regional Water Quality Control Board 401 Water Quality Certification and Waiver
issued 5/15/2006 and amended 8/11/2006.
2. California Department of Fish and Game Agreement Regarding Proposed Stream or
Lake Alteration pursuant to Section 1602 of the California Fish and Game Code.
3. Department of the Army Nationwide Permit (NWP) 3 and 33 issued on 11/6/2006.
FISCAL IMPACT:
The Engineer's Estimate for the cost to construct the Lake Calavera Remedial Improvements
Project is as shown below in Table 1.
TABLE 1
LAKE CALAVERA REMEDIAL IMPROVEMENTS
(PROJECT NO. 38211}
Engineer's Estimate of Construction Cost
Construction Contingencies (10%)
Construction Management & Inspection (10%)
Design
Environmental
Environmental Mitigation Estimate
Temporary Pumping Program (FY 05-06 & FY 06-07)
TOTAL PROJECT COST
CURRENT APPROPRIATION
ADDITIONAL APPROPRIATION REQUIRED
ESTIMATED
COSTS
$4,200,000
$420,000
$420,000
$630,000
$250,000
$150,000
$100,000
$6,100,000
$3,217,600
$2,882,400
The final construction cost estimate has been prepared through a collaborative effort with HDR
Engineering and Ben C. Gerwick Inc. and has been reviewed by the City's engineering staff. Ben C.
Gerwick prepared the design and cost estimate for the unique construction approach not requiring
water level draw down to facilitate construction while HDR Engineering prepared the design and cost
estimate for the balance of remedial improvements.
Based on the updated Engineer's Estimate reflecting the current cost conditions, the project costs now
exceed the current appropriation. Since being last updated, construction material costs for electrical
and mechanical equipment, steel, copper, and concrete have dramatically increased. In particular
mechanical equipment, stainless steel, high density polyethylene pipe, concrete, and aluminum have
significantly increased and considerably outpaced the standard Engineer News Record Construction
Cost Index (ENR CCI) by a range of 25% to 100%. Also contributing to the construction cost increase
PageS
are design changes resulting from the environmental permitting process. The following are some of
the specific factors causing the increased construction cost:
• Use of the ArmorFlex block within the spillway requires increased channel excavation and its
use is approximately twice the cost of using conventional shot-crete lining
• Use of colored concrete increases unit cost of concrete
• Spillway earthwork quantities have changed due to the damage resulting from previous storm
water flows within the spillway channel
The total project cost is estimated at $6,100,000 for the construction and mitigation program of the
Lake Calavera Remedial Improvements Project and is being funded by the Water Replacement Fund.
An additional appropriation of $2,882,400 is anticipated to complete the project. A request for an
additional appropriation is not being sought at this time, but is anticipated at the time of award of the
construction contract. The additional appropriation will be based upon actual contractual costs.
Sufficient funds are available for the additional appropriation when requested at the time of award of
the construction contract.
The Lake Calavera Remedial Improvements Project will restore operational control and safety of the
dam while also restoring compliance with the requirements of the California Department of Water
Resources Division of Safety of Dams (DSOD). Because of the need to restore compliance with the
DSOD, specific requirements have been incorporated into the project, and there is no option to
redesign this project to be within the current appropriation.
EXHIBITS:
1. Location Map
2. Resolution No. 1283 approving plans and specifications and authorizing the
District Secretary to the Board to advertise for bids for Lake Calavera Remedial
Improvements, Project No. 38211, and appropriation of funds.
DEPARTMENT CONTACT: Christopher Muehlbacher, (760) 602-2736, cmueh@ci.carlsbad.ca.us
LOCATION MAP
CITY OF OCEANSIDE
NOT TO SCALE
CITY OF OCEANSIDE
HIGHWAY
PROJECT
VICINITY
MAP
NOT TO
SCALE
PROJECT NAME
CALAVERA DAM - IMPROVEMENTS
EXHIBIT
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'AWN BY: SCOTT EVANS. CARLSBAD ENGINEERING DEPT.7/29/02 H:\CAPITAL IMPROVEMENT PROGRAU\3821 LAKE CALAVERA IUPROVEMENTS\PIANS&EXHIB1TS\PLANS\CALAVERA DAM.DWG
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RESOLUTION NO. 1283
2
A RESOLUTION OF THE BOARD OF DIRECTORS OF CARLSBAD
3 MUNICIPAL WATER DISTRICT (CMWD), APPROVING PLANS
AND SPECIFICATIONS AND AUTHORIZING THE DISTRICT
4 SECRETARY TO ADVERTISE FOR BIDS FOR LAKE CALAVERA
REMEDIAL IMPROVEMENTS, PROJECT NO. 38211, AND
5 APPROPRIATION OF FUNDS.
6 WHEREAS, the Board of Directors of Carlsbad Municipal Water District has determined
7 it necessary, desirable, and in the public interest to construct Lake Calavera Remedial
8 Improvements, Project No. 38211; and
9 WHEREAS, the plans and specifications for furnishing of all labor, materials, tools,
10 equipment, transportation, and other expenses necessary or incidental to said project have been
11 prepared and are on file in the Engineering Department of the City of Carlsbad and are
12 incorporated by reference herein; and
13 WHEREAS, the estimated project costs for the Lake Calavera Remedial Improvements
14 Project is $6,100,000; and
15 WHEREAS, the appropriation totaling $3,217,600 for the Lake Calavera Remedial
16 Improvements Project is insufficient to complete the project;
17 WHERAS, additional funds in the amount of $2,882,400 are anticipated to be needed to
18 complete the project and will be requested at time of award of construction contract; and
19 WHEREAS, a Mitigated Negative Declaration has been adopted by the Planning
20 Commission by Resolution No. 5890, dated January 18, 2006, as required by the California
21 Environmental Quality Act; and
22 WHEREAS, the Planning Commission approved a Conditional Use Permit (CUP 04-11)
23 on January 18, 2006 by Planning Commission Resolution No. 5891; and
24 WHEREAS, the Planning Commission approved a Habitat Management Plan Permit
25 (HMPP 05-03) on January 18, 2006 by Planning Commission Resolution No. 5892; and
26 WHEREAS, an appellant filed a timely appeal of HMPP 05-03 on January 23, 2006 and
2^ later amended the appeal on January 27, 2006; and
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1 WHEREAS, upon hearing the appeal, the City Council upheld the findings and conditions
2 of Planning Commission Resolution No. 5892 by City Council Resolution No. 2006-101 on
3 April 18, 2006; and
4 WHEREAS, the project has received the necessary environmental permits from the
5 California Regional Water Quality Control Board and the Department of the Army and an
6 agreement from the California Department of Fish and Game to conduct the improvements.
7 NOW, THEREFORE, BE IT RESOLVED by the Board of Directors of Carlsbad Municipal
8 Water District as follows:
9 1. That the above recitations are true and correct.
10 2. That the plans, specifications, and contract documents, on file in the
11 City Engineer's office as described above for the Lake Calavera Remedial Improvement Project,
12 Project No. 38211, are hereby approved.
13 3. The District Secretary of the Carlsbad Municipal Water District is hereby
14 authorized and directed to publish, in accordance with State law, a Notice to Contractors Inviting
15 Bids for the construction of the Lake Calavera Remedial Improvement Project, Project No. 38211,
16 in accordance with the plans, specifications, and contact documents referred to herein.
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PASSED, APPROVED AND ADOPTED at a Special Meeting of the Board of
Directors of the Carlsbad Municipal Water District of the City of Carlsbad on the 21st
day of, November, 2006, by the following vote:
AYES: Board Members Lewis, Hall, Kulchin, Packard, Sigafoose
NOES: None
ABSENT: None
ATTEST:
LORfcAINE M. WOOD, Secretary
(SEAL)
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