AWARD OF CHANGE TO AN EXISTING CONTRACT FOR THE SEWER SYSTEM AT THE VICINITY OF 24TH STREET AND MANHATTAN AVENUE

Recommendation:

It is recommended that the City Council:

1. Authorize the Director of Public Works to issue a change order to the existing City contract with W.A. Rasic Construction for an amount not to exceed $95,000 for the Sewer Segments at the intersection of 24th Street and Palm Drive to Loma Drive, west of Park Avenue.

2. Authorize additional expenditure from the Sewer Rehabilitation project (CIP 96-408).

3. Authorize increasing CMI Contract to include additional inspection and construction management for an amount not to exceed $7,000.

Analysis:

Last week the sewer line at the corner of Manhattan Avenue and 24th Street backed up causing an overflow onto the street. The video for this sewer line was reviewed and revealed a poorly designed Sewer System at the corner of Manhattan Avenue and 24th street. This segment connects the Loma Drive sewer to the 24th Street sewer on Manhattan Avenue. At the present time, this sewer line is reduced from 8" to 6" pipe, creating a bottle neck, causing an over flow in the pipe. In addition, the existing manholes along this sewer line show signs of structural failure and will have to be replaced. Since the next sewer project is not scheduled to begin this fiscal year, it is important to add this segment of the sewer line to be replace with the existing contract.

The contract includes itemized values for any type of work to be done. The price of the change order is calculated based on actual quantities completed at the site and measured by the City's inspector and paid for by the schedule of payment. Staff has prepared an estimated cost of construction based on measured quantities. These quantities will have to be confirmed with the actual work done once the construction is completed. Other underground conditions may impact both the construction quantities and timing of the project. One example of such conditions on this sewer project is the reconstruction of the laterals. When laterals were exposed, it was apparent that they would have to be reconstructed (originally not in the contract) since the laterals entered into the sewer main from the top of the pipe rather than side entrance causing reconstruction of longer segment of the laterals, therefore, increasing the contact quantities and contract amount by approximately $25,000.

Fiscal Impact

It is recommended to authorize additional expenditures of $102,500 from the City-Wide Sewer Rehabilitation Project (CIP96-408) to construct the subject Sewer Segment at the vicinity of Manhattan Avenue and 24th Street. Total Funding Required:

Contract C.O. --- $85,743

Contingency 10% --- $8,575

Inspection & Construction Management --- $7,000

---

COST ESTIMATE FOR CONSTRUCTION OF SEWER PROJECT ON LOMA, MANHATTAN & 24TH STREET.

ITEM NO. ACCORDING TO BID SCHEDULE	EST. QUANTITY	ITEM DESCRIPTION	UNIT PRICE	TOTAL
2	400 L.F	Install 8-In Fold/Form Lining System	$40	$16,000
3	5 EA.	Trim Protruding Taps With Internal Cutter	$400	$2,000
4	12 EA.	Reconnect Laterals By Internal Cutter	$300	$3,650
5	5 EA.	Construct New Standard Sewer Manhole With Fame And Cover	$2,885	$14,425
7	500 L.F.	Remove Existing Sewer And Reconstruct 8-In. VCP Sewer Including Backfill Complete In Place	$56	$28,000
8	9 EA.	Reconnect Existing Sewer Laterals To The New VCP Sewer	$182	$1,638
12	5 EA.	Remove Existing Manhole or Remove Manhole Frame And Cover And Fill Manhole With One Sack Cement Slurry And Pave To Match Existing	$1000	$5,000
13	90 L.F.	Remove Or Abandon Portions Of Existing Laterals, As Required, To Connect Service Laterals To The New VCP Sewer	$82	$7,380
14	90 L.F.	Extend Existing Laterals, As Required, To Connect Service Laterals To The New VCP Sewer	$85	$7,650
		SUB TOTAL		$85,743

ATTACHMENT "

Back to HomePage | Back to Agenda | Top of Page