Gap Filler Detail

1960 – National Archives of Canada

Classification SECRET

File Reference:S10-136-80/5 TDO329

MINUTE SHEET

9 Dec 60

TO: CCE (thru COR).

Subsequent to your Treasury Board submission for 38 gap fillers in Dec 1959, there was joint USAF/RCAF agreement on a major change in the northern boundaries of radar coverage and a new interpretation of "500' above flyable terrain". This is explained in detail in the attached Appendix "A" - "Concept of Operations" and "Gap Filler Criteria" which was received from USAF/ADCHQ and concurred in by NORAD.

This required a complete re-evaluation of the 45 CADIN gap fillers which subsequently resulted in the relocation of 22 gap fillers.

In support of your submission for funds for the field survey task in Jul 60, ATSC memorandum S949-105 TDO165P dated 13 Jun 60 was sent to A/CCE thru DADSI. Attached herewith as Appendix "B" is a copy of this memorandum for easy reference. You will note this memorandum contains a review of events leading up to the field surveys which resulted from the aforementioned changes in criteria.

You have received under separate cover, copies of the Minutes of a Joint USAF/RCAF Site Evaluation meeting held on 28-29 Nov 60, which examined the entire 45 gap filler deployment and approved the locations of 43 gap filler sites, leaving 2 to be relocated early in 1961.

The 43 approved sites are broken down as follows:-

The following 21 sites were previously approved by TB and their locations remain unchanged:-

CG1	Nobel Ont	CG12	La Tuque PQ
2	Nicolet PQ	13	Todd Mtn NB
3	Tobermory Ont	14	Timmins Ont
4	St Joseph NS	15	Belleterre PQ
5	Formosa Ont	16	Nipigon Ont
6	Scotch Settlement	17	Atikokan Ont
7	Lac Ste Marie PQ	19	Biscotasing Ont
8	Algonquin Park Ont	20	Marathon Ont
9	Elliott Lake Ont	27	Batchawana Ont
10	Oba Ont	28	Eaglet River Ont
11	Chapleau Ont

The following 17 sites were also previously approved by TB but have been relocated as indicated to provide optimum radar coverage within the stipulated criteria. In many cases there is a significant difference in the geographic locations and/or estimated costs as contained in the field siting reports.

		Relocated from the following TB approved sites
CG18	Westport Ont (relocated)	Westport
21	Shemogue NB	Mt Carleton
22	Bridgetown NS	New Yarmouth
23	Hastings Ont	Buckhorn
26	Lucknow Ont	Redditt
29	L'Anse St Jean PQ	Port Nuef
30	Summerville Centre NS	Alder River
31	L'Ascencion PQ	La Macaza
32	Nishkotea Lake PQ	Lac des Loups
35	Whitefish Lake Ont	Silver Falls
36	Squatteck PQ	Les Etroits
37	Beaver Tower PQ	St Cleophas
39	Gold Rock Ont	Ft Francis
40	White Brook NB	Mt Carleton NB
42	St Adalbert PQ	St Cecile
43	Graham Ont (relocated)	Graham
44	Manitouwadge Ont	Geraldton

The following are 5 new sites which have not yet been submitted for TB approval:-

CG24 Stoney Creek Ont

25 Sparta Ont

33 Mattawa Ont

34 Gowganda Ont

38 Taschereau PQ

In accordance with your Min (1), this accounts for the 45 gap fillers as contained in the CADIN Document and should provide the additional support you require for your proposed TB submission for funds.

(EC Poole) A/C
CTel
6-6627

cc:COR

App "A" - Concept of Operations & Gap Filler Criteria

App "B" - Siting CADIN Gap Fillers

CG24	Stoney Creek Ont
25	Sparta Ont
33	Mattawa Ont
34	Gowganda Ont
38	Taschereau PQ