Basis Of Estimate printable pdf download

United States Department of the Interior

National Park Service

Class A Construction Cost Estimate

BASIS OF ESTIMATE

PROJECT INFORMATION

Project:

Oso Comida Trailhead Improvements:

Park:

Bear Arbor NRA

Park Apha:

BEAR

PMIS:

XXXXXX

1/12/2011

Estimate Date:

YtB

Prepared By:

NPS Bear Arbor NRA

Company:

123 Bruin Meadows Rd.

Address:

Grizzley Hollow, CA 96023

City, State Zip:

(555) 123-4567

Phone:

BACKGROUND SUPPORTING MATERIAL (Scope of Work):

Existing parking lot will be upgraded, re-configured within existing disturbed area, for 40 car spaces, 5 ADA Spaces, 2 van

spaces, 10 RV pull throughspaces, and paved. Existing pit toilets will be removed and replaced with a wet comfort station

including septic system with in tank bio reactor treatment, and liquid disposal field; NEW WATER WELL NOW REQUIRED.

The existing picnic area will be rehabilitated and modified to meet ABBAS accessibility standards. Trail connections will be

formalized and upgraded; portions will be made accessible to facilitate access to Bruin Meadows overlook. Existing

uncontrolled social trails will be restored to natural and a channelizing seat-resistant wood rail fence added to direct

movement from parking area to trail connection. The septic system incorporates a new technology in-tank sanitary treatment

process that will be pre ordered and supplied by NPS as GFP. Puchase cost of tank and treatment materials is included in

direct cost estimate.

SOURCE OF COST DATA:

Comfort Station unit costs are based a combination of sources that include actual material take-offs and vendor quotes,

review of actual final costs and project labor records for a similar facility constructed in 2009 at neighboring Ursa Hollow park.

Parking lot costs are based on actual contract prices from Spring 2010 FHWA road project on Bruin Meadows Road adjacent

to the site adjusted to remove previous O&P. Purchase price for the prefabricated Septic-King™ is an actual vendor quote

FOB park warehouse. Supplimental cost were obtained from RS Means, Facilites Cost Data (FCCD), 25th Annusal Edition.

WHENEVER RSMEANS BARE UNIT COSTS WERE USED FROM THE FCCD DATA, 10% WAS ADDED TO MATERIALS &

EQUIPMENT AND 60% TO LABOR TO ACCOUNT FOR INSTALLER (SUB) O&P

ESTIMATE ASSUMPTIONS:

Estimate assumes that all improvements will be constructed as a singe project during one construction season. East half of

existing dirt parking area and trailhead will remain in operation until new paved lot and walk connections are completed. 2nd

half of existing lot will be available for contractor laydown/equipment area, but contractor's labor force must park at

maintenance yard 5 miles away and be shuttled into site. Shuttle costs and additional portable toilet cost impacts are

included in Government Special Conditions. Septic-King™ system will be preordered by the Park to avoid long lead time from

impacting installation schedule.

MAJOR CHANGES FROM PREVIOUS ESTIMATE:

Parking lot configuration changed slightly to accommodate RV pull through spaces. Existing dirt parking area will be gravel

surfaced for use as overflow parking and equestrian staging area. Photo-voltaic system has been deleted for budgetary

purposes, viewshed impacts, concerns over viewshed impacts and negative results of net life-cycle payback analysis. Water

is not avialable in road; well added to service wet comfort station - assumes 1200 VLF depth.

BEAR Trailhead - 100% Draft Class A Cost Estimate

Page 1 of 38

Print Date: 1/24/2011

Basis of Estimate

Basis Of Estimate

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