S10-136-80/5 (JDPG)
Victoria Island,
Ottawa, Ontario
21 November 1960
WH Crandall & Associates
PO Box 36
Moncton, NB
Attention: Mr WH Crandall
Re: Design Briefing
Gap Filler Radar Stations, Maritimes
Dear Sir:
This letter will confirm a design briefing held between your Messrs WH Crandall, AJ Hiscock, F Gallagher and our Mr WR Campbell at your office on 8 November 1960.
A general review was made of all Gap Filler Radar Stations in the Maritimes. Final design may be proceeded with on the following sites: Todd Mountain, St Joseph, and Scotch Settlement Relocated. Field surveys will be required when authorized on the following new sites: Summerville Centre, Bridgetown, Shemogue and White Brook.
DCL will be issuing a change order to existing contract for the final design at the three approved sites and will be requesting an estimate for consulting services on the portion of the work now briefed, followed by a final estimate when completely briefed.
The scope of the work will include the following items:
All buildings will be of metal construction. The Radar building will be heated electrically. The Power and Accommodation building will be heated by a hot air furnace, will include 1, 2 or 3 diesel generators and will provide emergency accommodation for 4 men on the basis of 2 days week normal maximum. It will also be equipped with kitchen facilities, chemical toilet and rainwater storage tank.
The sites will be cleared of trees for a maximum of 500 feet radius for radar operations or until the ground drops 50 feet below the elevation of the highest point or for a maximum 500 feet radius for fire protection in high danger areas.
The road allowance will be 66 ft wide, with the power and telephone line approximately in the centre and a 12 ft road with 3 ft shoulders to one side. A narrower road allowance will be acceptable if protection to the pole line is already provided by cleared fields.
The access road may end in a loop around the tower and buildings and may be at a slightly lower elevation. This road should be designed to no better standard than other roads in the area.
The consultant will open negotiations with the various hydro-electric authorities for power supply to the sites and will submit the proposals (without contract forms) to AFHQ for approval. The proposals should clearly state the responsibility for step-down transformers.
The latitude and longitude grid lines, shown on the 1" - 50' and 1" - 200' plans, shall be established by a survey from the site on the ground to a point which can be identified both on the ground and on a topographic map sheet.
The access road plan-profile, on a scale of 1" - 100' H and 1" - 10' V, shall be prepared on clear paper, standard size sheets, and adding profile grid as required. On a sepia of the original drawing, show the proposed alignment and grade of the access road and submit two prints to AFHQ for approval in principle site by site.
The general site plan, on a scale of 1" - 200', shall be prepared on linen or equal, standard size sheets, using latitude and longitude grid lines as match lines, and showing the complete access road to the all-weather road.
The following is a review of plans immediately required at approved sites:
Scotch Settlement Relocated
1" - 50' plan - acceptable1" - 100' H & 1' - 10' V access road plan-profile - Prepare and submit to AFHQ
1" - 200' plan - Prepare and submit to AFHQ.
Soil investigation - At least 1 test hole when tower located.
St Joseph
1" - 50' plan - acceptable but remove "site boundary lines".1" - 100' H & 1" - 10' V access road plan-profile - Prepare and submit to AFHQ. Access road is to be on east side of fence line. Survey with test holes.
1" - 200' plan - Prepare and submit to AFHQ. Show hamlet of St Joseph.
Soil investigation - At least two auger holes when tower located.
Todd Mountain
1" - 50' plan - acceptable but remove "Site boundary lines".1" - 100' H and 1" - 10' V access road plan-profile - prepare and submit to AFHQ.
1" - 200' plan - prepare and submit to AFHQ.
Soil investigation - At least two auger holes when tower located.
AFHQ will forward standard designs for towers and buildings and proposed site layouts as soon as available.
All design work shall be programmed for completion before 28 February 1961, in order to permit a spring tender call and summer construction (May to December).
If new sites receive early approval, field surveys will be requested in December 1960, complete with reconnaissance report, interim construction estimate and field survey report.
Correspondence shall be classified as follows:
A copy of all field notes on approved sites is required by AFHQ.
It is requested that any points of design not included in this summary and requiring clarification be referred to AFHQ as soon as possible.
Yours truly,
(JW Griffith)
Group Captain
for Chief of the Air Staff