BIDDER'S INQUIRIES & RESPONSES
DISTRICT 11 CONSTRUCTION

 
CONTRACT NO: 11-080804
ROUTE / KP 11-SD-5,52,94,805-Var
LOCATION In San Diego County At Various Locations.
DESCRIPTION Install Microwave Vehicle Detection Systems.
ESTIMATE $ 2,300,000
ADVERTISE DATE 10/23/2006
BID OPENING 11/30/2006
FINAL POSTING
11/29/06    @   17:00 

BID RESULTS
1
HMS CONSTRUCTION INC.
$2,763,212.10
2
MANUEL BROS. INC.
$2,811,750.00
3
TDS ENGINEERING
$3,131,241.00
4
VALUTINI CORP.
$3,392,000.00
5
GOLDEN STATE UTILITY CO.
$3,497,605.00


The Caltrans District 11 Office is located at 2829 Juan Street, San Diego, CA 92110. The mailing address is P.O. Box 85406, San Diego, CA 92186-5406. The District 11 Duty Senior telephone number is (619) 688-6635. Please submit all inquiries in the proper format by fax to (619) 688-6988 or e-mail to:
Duty_Senior_Const_District11@dot.ca.gov.
The responses to bidder' inquiries, unless incorporated into a formal addenda to the contract, are not a part of the contract and are provided for the bidder's convenience only. In some instances, the question and answer may represent a summary of the matters discussed rather than a word-for-word recitation. The responses may be considered along with all other information furnished to prospective bidders for the purpose of bidding on the project. The availability or use of information provided in the responses to bidder' inquiries is not to be construed in any way as a waiver of the provisions of Section 2-1.03 of the Standard Specifications or any other provision of the contract, the plans, Standard Specifications or Special Provisions, nor to excuse the contractor from full compliance with those contract requirements. Bidders are cautioned that subsequent responses or contract addenda may affect or vary a response previously given.
Caltrans District 11 Construction Department has developed this method of answering Bidder's Inquiries to better serve the needs of the Contractors who bid on our Projects. Caltrans District 11 Construction Department will post all of the questions submitted by any of the contractors that are registered Planholders for that Contract, but reserves the right to not answer any questions deemed unsatisfactory for public viewing.
The BIDDER'S INQUIRIES & RESPONSES will be updated continuously and all attempts will be made to do the final posting by 15:00 on Wednesday prior to the bid opening.
INFORMATION AVAILABLE


BID ITEMS
 SPECIALS
PLANS
 PLANHOLDERS
 



ADDENDUM




 
 
 
 

BIDDER'S INQUIRY SUBMITTAL FORM


Inquiry No.
Inquiry
    1

   Q:10/30/06
   R:11/08/06
 

Plan Sheet / Specification Reference= TMS various locations, specifically
type IIIC services, sheet E3 note 1, sheet E10 note9, sheet E24 note 1,
sheet E32 note 2,

Question= The services listed above call out for various sized
transformers to be installed in the service pedestal. The transformers
called for are 2, 3 & 5kva 480-120 or 480 - 120/240 volt 1 phase. The
minimum average sizes for these transformers from Acme & Jefferson, GE
etc, are 13"h x 5.5"w x 5.1"d for the 2KVA, to 14"h x 7.5"w x 7.1"d for
the 5KVA. The space available per the standard plans page for the IIICF
shows approx 130mm (5.12")depth available on the load side. This space
as shown on the ES-2F page, is reduced by the dead front panel (see side
view upper left side of page ES-2F). Based on these transformer
dimensions and the requirement of the deadfront panel, which reduces
clearance, the transformers will not fit within a standard type IIICF.
Will a partial deadfront be allowed?

  • NO

,or will the transformers be placed
in a pull box near the service?

  • NO










2
   Q:11/02/06
   R:11/16/06
Plan Sheet / Specification Reference=

Question=With all due respect for the intense effort by many Engineering and Management personnel and sensitivity towards an open and fair consideration of the two primary Microwave Traffic Monitoring systems, we are raising an issue of proprietary and legal significance.  Specifically, the Special Provision states that the MVDS proposed by the bidders must support either the Wavetronix or EIS-RTMS protocol.  We feel the wording of the Special Provisions was intended to fairly elaborate upon the technical criteria which would enable consideration of both these microwave products.  However, several criteria apply to only one product and do not apply to the other.  We have provided a discussion on two issues and request clarification of another: Page 232 of the Special Provision Section 10-3.14 MVDS – TECHNICAL REQUIREMENTS.
One of the technical criteria states: “Analog and microwave oscillators within the MVDS that are used to generate the transmit signal must be locked to a digital signal.  The Bandwidth of the transmit signal of the MVDS shall not vary by more than 1 percent under all specified operating conditions and over the expected life of the MVDS.”
This specific statement outlines a design technique and criteria which is unique to one manufacturer and protected by patent.  This statement eliminates consideration of other suppliers of the MVDS.  In essence this is a closed single source specification.
In explanation, the EIS RTMS does not lock to a digital signal for generating the operating or transmitting frequency, but employs an equally stable phase lock technique which is different than that outlined above and fully compliant with the rigorous stability requirements of the FCC.  Further, this alternative transmitter signal generation and stability enable the EIS RTMS to be fully compliant to the performance measures and accuracy required by other criteria listed in the Special Provisions for testing and validation of performance as listed on following page 234.
We respectfully request that the wording be removed.
Page 231 of the Special Provision Section 10-3.14 MVDS – FUNCTIONAL REQUIREMENTS. and Page 233 of the Special Provision Section 10-3.14 MVDS – TECHNICAL REQUIREMENTS. One technical criteria states: “The MVDS shall be configurable for 30 second to 24 hour polling cycles and store vehicle count, speed, classification, and occupancy data in 10 second and 60 minute intervals.”The normal operating collection of data is in 30 second intervals.  The normal polling processes varies from 60 minute to 24 hour cycles.   The specific statement within the request is worded such that it mixes data retrieval processes and statistical storage concepts. This statistical interval for storage and cycle for polling from a MVDS is bound up within the operating system and firmware of the microwave sensor.  The operating system and firmware is defined on Page 231 of the FUNCTIONAL REQUIREMENTS. “B. The MVDS shall support the Wavetronix “SS105 Smart Sensor version V2.02” or the EIS “RTMS (data) protocol version 6.8, or demonstrated equal.” The EIS RTMS data protocol version 6.8 provides for Statistical Data Storage Intervals from 10 to 900 secondsThe EIS RTMS data protocol version 6.8 provides for data retention such that polling cycles from 30 second to 24 hour are easily programmed into the MVDS system. We respectfully request that the wording change “store vehicle count, speed, classification, and occupancy data in 10 second and 15 minute intervals. Page 231 of the Special Provision Section 10-3.14 MVDS – FUNCTIONAL REQUIREMENTS.  One functional requirement states: “The contractor shall install an MVDS Termination Assembly (MTA) as shown on the plans.” Other criteria elaborating on the MTA are provided. With reference to the Plans, Drawings E-42, E-43, E-44 and E-45 which pertain to the mounting and cabinet there are no references to the MTA.  Is the notation for sensor interface and / or communications interface this relationship or is it another contractor devised interface? Please clarify.

  • Please refer to Addendum No. 1
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