Award of Invitation for Bid #05-13, Sanitary Sewer System Improvements, Various Locations as follows: Groups I, II and III, Sanitary Sewer Lining and Sanitary Sewer Dig and Replace in the amount not to exceed $8,000,000 for up to a 5-year period.
Staff recommends that the Mayor and Council award Invitation for Bid (IFB) #05-13 Sanitary Sewer System Improvements, Various Locations to the lowest responsive and responsible bidders as follows: Group I – Sanitary Sewer Lining to AM-Liner East Incorporated; Group II - Grandin Avenue Dig and Replace to Mid-Atlantic Utilities Incorporated; and Group III – Contingent Sanitary Sewer Dig and Replacements to Mid Atlantic Utilities Incorporated and Humphrey and Son Incorporated in an aggregate amount not to exceed $8,000,000 for a period up to five years.
Award of these contracts supports construction of various types of sewer improvements as part of the Sanitary Sewer Rehabilitation Capital Improvement Program (220-850-9G34, Attachment A).
IFB #05-13 is separated into three groups: Group I - Sanitary Sewer Lining; Group II - Dig and Replace of Sanitary Sewer on Grandin Avenue; and Group III - Sanitary Sewer Dig and Replace on an as needed basis. The expected outcomes of this project are to improve the condition of the sanitary sewer system, relieve sanitary sewer capacity constraints, reduce the probability of sanitary sewer overflows, and eliminate sources of inflow, infiltration and root intrusion.
The unit prices received for all three Groups are favorable and represent an approximately 15% reduction in per linear foot costs over the City’s previous sanitary sewer rehabilitation contract. Multi-year contracts in Groups I and III save City resources by avoiding the preparation of separate bids for each sanitary sewer segment in need of rehabilitation. Additionally, multi-year contracts are beneficial as it minimizes the "learning curve" and impact to residents of continuously hiring new contractors unfamiliar with the City's requirements. It will also save money by taking advantage of volume pricing in Group I and competitive lump sum task orders in Group III.
Awarding to two qualified contractors in Group III ensures an adequate work force and response time to handle the volume of sanitary sewer dig and replace projects in the City's Capital Improvement Program (CIP) for the next five years.
Group I - Sanitary Sewer Lining for a period of up to five (5) years.
The proposed work under this group includes the rehabilitation of sanitary sewers via cured in place lining in various locations throughout the City. Locations of the proposed work are prioritized annually by City staff based on the rehabilitation recommendations generated by condition assessments performed through the Department of Public Works’ Preventative Maintenance Program. The unit prices established in the bid are valid until June 30, 2014. Thereafter, the contractor may request a price adjustment, subject to approval by the City, which does not exceed the amount of the annual percentage change in the Consumer Price Index (CPI). Throughout the term of the contract, the City shall award individual task orders to the selected contractor to perform sanitary sewer lining in the highest priority locations.
Group II - Dig and Replace Sanitary Sewer on Grandin Avenue.
The proposed work involves the replacement of the sanitary sewer on the 900 block of Reading Avenue (Attachment B) and includes 357 linear feet of sewer pipe, two manholes, and 14 sewer house connections. The sewer pipe will be in the same location and the same depth as the existing sewer but upgraded to meet current standards.
The existing sewer was inspected in January 2009 and determined to be in poor condition. Due to offset joints and sagging, the existing sewer does not have positive slope and, therefore, does not flow efficiently. This can result in sanitary sewer blockages and potentially sanitary sewer overflows. The sewer cannot be rehabilitated through Cured-In-Place Lining. Once this condition was identified, the sanitary sewer segment was programmed into the CIP for replacement and scheduled for FY 2013, after higher priority sanitary sewer segments were replaced.
Group III - Sanitary Sewer Dig and Replacement on an as needed basis for a period up to five (5) years.
The proposed work under this group includes the excavation and replacement of sanitary sewers on an as needed basis. The unit prices established in the bid are valid until June 30, 2014. Thereafter, the contractor may request a price adjustment, subject to approval by the City, which does not exceed the amount of the annual percentage change in the CPI. The City shall award individual task orders on an as needed basis to the selected contractors to perform dig and replacement of sanitary sewers in various locations throughout the City. Task orders will identify the scope of work necessary though the ongoing Preventative Maintenance Program or through Sanitary Sewer Capacity Analyses conducted by Public Works and its consultants.
Background - Sanitary Sewer System Preventative Maintenance and Rehabilitation Program:
Rockville’s Sanitary Sewer Preventative Maintenance Program consists of comprehensive inspections and subsequent rehabilitation of the sewer pipes and manholes within the City’s wastewater collection system. The Department of Public Works used robotic camera technology utilizing closed-circuit television (CCTV) cameras to determine which sewer lines need to be rehabilitated or replaced. Two City CCTV trucks combine to inspect 15 miles of sewer per year, in which a camera goes through the pipe from manhole to manhole. City Staff evaluates the condition of the sewers based on PACP (Pipeline Assessment Certification Program) scoring. Based on this evaluation in accordance with the footage gathered from the CCTV cameras, the pipes and manholes with significant defects are then prioritized for rehabilitation. See Attachment C for the current status of the sanitary sewers identified for rehabilitation. Two different methods of rehabilitation are utilized: Cured-In-Place Lining and Dig and Replacement.
Cured-In-Place Lining does not involve excavation and is the preferred method because it is the most cost effective way of restoring sanitary sewer infrastructure assets. When a sewer is rehabilitated through Cured-in-Place Lining, a resin-saturated felt tube is inserted into the existing pipe. Steam or boiling water is then pumped through the tube, heating the resin which cures the liner. Once the curing process is complete, the hot water is released, resulting in a new pipe created within the existing pipe. If the sanitary sewer is severely degraded and can not be rehabilitated via Cured-In-Place Lining, the “dig and replace” construction option is used. This method involves the excavation, removal, and replacement of the sanitary sewer pipe, either in a new alignment or in the same location, with sufficient diameter to convey the ultimate wastewater flow, based on Master Plan level of development.
If an existing sanitary sewer pipe is not large enough in diameter to convey the wastewater that flows to it, then the pipe will be excavated and replaced with a pipe of sufficient diameter to convey the ultimate wastewater flow in the same location.
If a sanitary sewer is located in an inaccessible location that is undesirable for maintenance purposes, such as in a heavily wooded area with limited access, or on private property without an easement granted to the City, then the pipe may be replaced within the City right-of-way or within an easement granted to the City. In some instances, it may be more cost effective to obtain easements from private property owners to perform maintenance and leave the existing pipe in place rather than replace the sewer in a new location if the sewer is in a location that is easily accessible for maintenance.
Benefit of sewer rehabilitation include:
- Renewal of aging infrastructure
- Elimination of potential sanitary sewer blockages and overflows
- Protection of public health and safety
- Improves the environment
- Ensures compliance with federal and State regulations
- Relocates sewers that are located on private property not within an easement to the City in areas that are difficult to maintain.
Mayor and Council History
This is the first time this item has been brought before the Mayor and Council.
Public Notification and Engagement
Commercial properties and residents will be notified via neighborhood advisories at least two weeks in advance of construction. In addition, residents will be notified a second time, two business days in advance of sanitary sewer lining construction to provide additional instructions regarding limiting the usage of water during the sewer lining curing process. Additional outreach will be conducted for dig and replace projects as the scopes and construction schedules are determined.
An article in the April 2012 issue of Rockville Reports contained detailed information about the continuous sanitary sewer system preventative maintenance program. In conjunction with the Rockville Reports article, Channel 11 produced a short segment highlighting the sanitary sewer system preventative maintenance program. Additionally, the City website contains information about the program.
Staff prepared and publicly advertised Bid #05-13 in accordance with Purchasing Ordinance 17-61 in September 2012. The bid was solicited to 288 firms via the State of Maryland's e-Maryland Marketplace bid web portal. The following bids were received:
GROUP I - Sanitary Sewer Lining
Bid Amounts Based
Firm Location on Est. Quantities
AM-Liner East, Inc. Berryville, VA $1,681,400.00
Layne Inliner, LLC Berwyn Heights, MD $1,917,035.00
Miller Pipeline, LLC Indianapolis, IN $2,048,462.50
Humphrey and Son, Inc. Laurel, MD $2,270,045.00
Insituform Technologies, Inc. Chesterfield, MO $2,425,530.00
Pleasants Construction Clarksburg, MD $2,719,175.00
GROUP II - Dig and Replace - Grandin Avenue
Firm Location Bid Amount
Mid-Atlantic Utilities, Inc. Carlye, PA $175,818.00
Humphrey and Son, Inc. Laurel, MD $205,670.00
Sagres Construction Corporation Alexandria, VA $227,310.00
Anchor Construction Corporation Washington, DC $332,588.00
GROUP III - Contingent Dig and Replace
Bid Amounts Based
Firm Location on Est. Quantities
Mid-Atlantic Utilities, Inc. Carlye, PA $596,980.00
Humphrey and Son, Inc. Laurel, MD $715,595.00
Sagres Construction Corporation Alexandria, VA $929,300.00
Anchor Construciton Corporation Washington, DC $1,473,073.00
The bid amounts shown above for Groups I and III are estimated annual quantities used for bid evaluation purposes only. Work under these groups will be assigned via task orders issued by the City. The bid amount for Group II reflects the total amount of work required for the dig and replacement of the sanitary sewer on Grandin Avenue.
Funding is provided through the Sewer Rehabilitation CIP (220-850-9G34) with over $2,700,000 in currently available funding. Future funding will be provided through the Sewer Rehabilitation CIP, subject to Mayor and Council budget approval.
Continuation of the contract beyond June 30th of each year is subject to appropriation approval by the Mayor and Council.
Upon Mayor and Council approval, the Purchasing Division will issue contracts to AM-Liner East, Inc., Humphrey and Son, Inc. and Mid-Atlantic Utilities, Inc.
Attachment A - Sewer Rehabilitation CIP Sheet.pdfAttachment B - Grandin Ave Sanitary Sewer Replacement.pdfAttachment C - Sewer Preventative Maintenance and Rehab. Program.pdf
Craig Simoneau, Director of Public Works
Approved on: 11/08/2012
Barbara B. Matthews, City Manager
Approved on: 11/13/2012