Memorandum

Memorandum

City of Lawrence

Engineering

TO:	David L. Corliss, Diane Stoddard, Cynthia Wagner
FROM:	Chuck Soules
Date:	February 4, 2010
CC:	Jonathan Douglass, Mark Thiel, Steve Bennett, Roger Zalneraitis , Dave Wagner, Philip Ciesielski
RE:	Lawrence Municipal Airport – Sanitary Sewer Agenda Item for February 9, 2010 City Commission

Please include the following item on the City Commission’s February 2, 2010 agenda.

Project Background. The airport is located north of US Route 24/40 about one-half mile east of 3^rd Street. It is a valuable asset to the City, currently accommodating over 32,000 operations annually and generating over $9 million dollars in local revenue for the economy. The airport is approximately 500 acres, has two runways, a terminal, 36 t-hangars, and several small on-site aviation services and hangars used by local businesses and individuals. The airport is an “island” of City property, located about a mile north of the City border.

While the airport provides a valuable service to the community, it is currently underutilized due in part to inadequate City infrastructure. The airport is served by an 8 inch waterline for basic office use, but is insufficient for fire suppression. Wells have to be drilled for fire safety, and there may be a limit to the number of wells that can be drilled. Airport facilities have no sewer services, using septic instead. County regulations prohibit more than one septic and lateral field every three acres. This requires land that could otherwise be used for development to remain as open space for septic.

There is an immediate need for additional sewer facilities at the airport. At least one septic system is failing, and some recent firm inquiries would require greater service capacity by late spring of 2010. Also, a number of business inquiries have occurred over the last year for locations at the airport that suggest that the airport has more demand for business space than can be accommodated by existing water and sewer service.

Project Status.

May 26, 2009 – BG Consultants and Burns & McDonnell hired to prepare a study

November 16, 2009 – Draft sewer report presented to Airport Advisory Board. Recommendation that the City Commission proceed with the airport collection system and holding tank/wet well and force main installation

December 21, 2009 – Public meeting to present study

January 19, 2010 - Study presented to City Commission

February 2, 2010 – Design contract presented to City Commission

Project Description. The design includes the gravity collector system on airport property to a septage holding tank at HWY 24 with necessary telemetry and odor control, and force main design (see project map). The design includes necessary permitting and will produce a final set of documents for construction bidding.

The City has reviewed the project costs with the engineer. Following are the revised construction cost estimates:

Gravity Sewer - 1,874 ft.	$ 336,762.00
Septage Holding Well – includes electrical service & odor control	256,000.00
Force Main	593,592.00
TOTAL Construction Cost	$1,186,354.00
Engineering Fee	101,606.25
Bidding/Construction Phase Services	14,698.00
O/E Certificates / Right-of-Way Acquisitions	50,000.00
Geotech	5,000.00
Study Fee	38,438.00
Electric Service Extension – Westar	30,000.00
TOTAL Project Cost	$1,426,096.25

· City staff will provide level indicator and PLC (Programmable Logic Controller), specifications/design.

· City staff will perform inspection of the construction project.

· City will complete any platting/zoning issues for the septage holding well site.

· Bidding and construction phase services are charged only as requested and may include answering pre-bid questions, conducting a pre-bid meeting, reviewing bids, review/approve shop drawings, review/approve pay estimates, prepare as-built drawings, preconstruction meeting, and prepare and approve change orders.

· Right-of-way acquisition is based on $0.35 sq.ft.

· Engineering fee is 8.5% of estimated construction costs. The engineering fee provides all design/specifications for a complete set of plans for construction, including septage holding well:

- site layout, fence driveway off 24/40

- structural design for wet well body and lid

- design aeration system, piping and blowers

- design odor control system

- electrical design

- piping, valving design

- level control, alarm design

- conduit layout

- site plan

- write and solicit geotechnical proposals

- coordinate with utility companies

- develop contract, front-end documents, technical specifications

and for the gravity system and forcemain:

- topographic survey

- 8,250 L.F. of forcemain

- Hwy 24/40 crossing – cased bore

- KTA crossing – cased bore

- legal descriptions, strip maps

- permitting – KTA, KDOT, KDHE

- 1,900 L.F. of gravity sewer

- airport road crossing

- evaluate terminal septic system; reconnect if necessary

- two public meetings

- coordinate with utility companies

- develop contract, front-end documents, technical specifications

· Comparison: Fairfield Farms – 1,500 L.F. of gravity sewer main; 1,750 L.F. of force main; temporary pump station with estimated construction cost of $333,000; geotechnical services an additional $2.000; engineering fee, $30,272. Design fee as a percentage of estimated construction cost is approximately 9%.

Projected schedule:

February/March 2010	Survey
March/August	Design
Late summer/early fall	Bid
2010 fall/winter	Construction
Spring 2011	Construction Complete

Action Request.

1. Authorize City Manager to sign agreement with BG Consultants in an amount of $101,606.25 for design services and an amount not to exceed $14,698.00 for bidding and construction services for a total contract amount of $116,304.25 for the extension of sanitary sewer service to the airport.

2. Authorize City Manager to execute a purchase order for geotechnical services for this project in an amount not to exceed $5,000.

Please let me know if there are any questions.

Respectfully submitted,

Charles F. Soules, P.E.

Director of Public Works

CFS/je

Attachments: Aerial Overview