June 17-19, 1805
58.51% Complete
Aug 30, 1803 Sep 30, 1806

June 17-19, 1805

 
Course from the Perogue & Distances &c
S. 9° E 286 poles to the mouth of the Creek    passed the first rapid at
80 poles of 4 feet fall one of 3 feet fall above the Creek    the
Creek is 55 yards wide at its mouth.
S 35° E. 270 poles to a high hill in Prarie
S 29° W 48 poles to a pile of Stones on a Dividing ridge in a Direction
the 1st rivein
S. 37° E 180 poles to a high part of the plain
S. 22° E 194 poles to 3 piles of Stones in the leavel plain leaving the
Course of the Creek
S 31° W. 112 poles to a rock and pile in a leavele Pln.
S. 15° W 400 poles to a pile of Stones, passing the head of a rivein at 280
poles
S. 36° W. 80 poles to a pile of buffalow Dung    passed the head of the
2d holl. at 2 poles
    (To the river)
N. 70° W 700 poles to the river, at which place the river only 90 yards
wide confined in Clifts, passed a Deep revein at 420 and one
near its mouth of deep bluff banks at 644 poles—    at
the mouth of this last revein a rapid of 3 feet up the river
N 82° W. 340 poles to the Grand falls or Shoot at which place the Mis-
souri
is Confined within 280 yards and Pitches 87 feet ¾ of
an inch a cascade for 200 yards above which has a fall of
about 18 feet below 93 yds. a rapid of 6 feet fall
S 24° W. 90 poles, passed a rappid 2 feet fall
S. 19° W. 80 poles, passed a revein.    Cascade
S. 11° W. 80 poles to a 2nd riffle of 4 feet fall
S. 31° W 520 poles opposit a rapid of 3½ feet fall and a Cascade of ½ a
mile of 4½ feet
S. 52° W. 178 poles, through a hand Some Plain river bends to the right
2 feet Dist.
S. 40° W 970 poles to a fall & pitch of 19 feet    passed a Deep revein
near its mouth at which a rapid of 5 feet fall, & 10 feet
N. 84° W 102 poles to the 2nd great falls or Pitch of 47 feet 8 Inches, a
Small rock attached to a bench of 5 feet fall on the Stard
Side at this fall Re: th 479 yards    wide river as far Can be
Seen down 1½ miles    N. 40° E.    Passed a desent of 7f the
N 86° W. 135 poles passed a fall & Cascade of 14:½    the fall about 6
feet pitch
S 49° W. 58 poles rapid water desent of 2 feet
S 78° W. 156 poles to very large & fine fontain of water at a rapid, boils
up and throws out an emense Current & quantity of water
decline 3 feet.
S 25° W. 124 poles on the river.    Several riffles in the river    dest. 4 feet
S. 35° W. 240 poles passed a rock & 3 trees on bank    the fall from the
last rappid to this place must be 8 feet
S 58° W. 88 poles up the river dcint 1 foot 6 In
S. 40° W 80 poles to the upper Pitch of 26 Feet 5 In. and Cascade &
one Pitch of 5 feet to the head of the rapid is 23 feet about
26.5 〈Inches〉 in all 49 feet 5 Inches fall from the last fall of
14.9 Inc feet to this a Continued rapid & cascade of about
19 feet fall    river 580 yds wide
S 81° W. 320 poles to the head of the rapids.
S 55° W 130 poles along the river
S 36° W 278 poles to a tree on the edge of the water.    passed a grove at
120 poles.    river 〈about a mile〉 1440 yds wide wide
S 6° W. 140 poles to a Small grove at a rapid on the Lard. Side
S. 64° E 78 poles to the lower part a timber in a Deep bend
S. 14° E 90 poles to a tree in the bend opposite to Some low timber
S. 17 W. 160 poles to opposit the mouth of Medison (Ma-pah-pah,-ah-zhah, Medicine) river on the Std.
Side    this river is 137 yards wide
S. 1° W. 88 poles opsd. the lower point of a Sand Island
S. 45° E 170 poles to Some low timber near Som old lodges
S. 13° E. 381 poles to the lower point of an Island
N, 88° E 70 poles to opsd. a 2d Island
N. 71° E, 120 poles to a pt. opposed a 3rd Island, narrow Chnl.
S. 25° E 664 poles to the river at the 〈most eastern S Easterly〉
Deduct 490
5293
bend    passed our Camp in Some woods opsd. the heads of
the 3 Islands at 174 poles and a Small Creck at 284 poles,
this Creck has back water wh it about ¾ of a mile and has a
wide butifull valey to the S. Mountain
  1320 add to the Distance below the Portg River
  320|6559 [or] Miles 20½

☞ the total descent of the water from the head of the rappids to the entrance of portage Creck is 352 feet 2¾ Inches [2]

    8            2¾
360      2¾

S 70 E 160 poles to the top of a high hill expirt near the most extreem S Esterly bend of the river.

From the top of this hill the Missouri bears S 85° W. about 10 ms.    the gap of the Mountains is S. 25° W. The highest part of the South Mountains is N 84 E

from the mouth of Portage Creek up the Missouri is S 10 W 280 poles & has a fall over repeeted rapids of about 10 feet

Then S 10° E ½ a mile & a fall of 6 feet

South ¾ miles & has a fall of 18 feet

S. 81° W. 1¼ miles    passed a run    the fall of about 13 feet in repeeted rapids.

S. 15° W. ½ a mile repeeted rapids of about 5 feet fall.

S 75° W ¼ of a mile to a mouth of the Deep Ravein [X: 1 foot fall] from the Commincement of this Course to the Great fall is 8 feet    the river is narrow Confined with high Bluffs.

Courses of the Missouri from the commencement of the portage below Portage River to the Most South Eastwardly bend above the Medicine River, noting the particular Cataracts Cascades and the hight they fall as Measured, together with an estimate of the decline of the water in rapids &c. &c. Sept. [June] 17 & 18th 1805.    (S E. Side) [3]

      feet
S 9° E 286 poles to the enterence of portage river 55 yds.
wide at 80 poles a rapid of 4 feet, the Com-
puted decent of the water above is 4 feet to-
gether makes—



    8
S 10° W. 280 Po: from the enterances of portage River up
the Lard. Side of the Missouri.    the Com-
puted distance the water in this distance is
about 10 feet



  10
S 10° E 160 Po. do do do do do Decent of     6
South 240 Po. do do do do Computed decent of   18
S. 81° W. 400 Po. do do do do Computed decent of
passing a deep Small rivene in this Course

  13
S. 15° W. 160 Poles the decent of the water within which dis-
tance is about five feet river inclosed in rocks

    5
S 75° W. 80 Poles to the enterance of a Steep rivene at
which there is a fall of 3 feet which aded to
the probably decent of the water in that dis-
tance 2 feet makes



    5
N. 82° W. 340 Poles to the Grand Cataract of 87 feet ¾ of an
inch.
Computed decent of water in the dis-
tance 6 feet. The river at this Cataract 280
yards wide and just below 93 yards wide total



  93 ¾
S 24° W. 90 Poles passing a fall of 2 feet purpindicular
which added to the estimated decent of 13
feet within the first 200 yds. next above the
Cataract makes a decent in this distance rather
more than




  15
S 19° W. 80 Poles passing a rivene and Cascade decent
about

    3
S 11° W. 80 Poles passing a Cascade of 4 feet, which to-
gether with the probable decent of the water
2 feet is


    6
S 31° W 320 Poles opposit a rapid of 3 feet 6 inch fall
which added to the probably decent of the
water within this distance of 5 feet 6 inches is
river inclosed in rocks of a dark colour



    9
S 52° W. 178 Poles through a handsom leavil plain the river
makeing a bend to the right decent of the
water probably about three feet


    3
S 40°W. 970 Poles to a fall of 19 feet, below which there is
a deep rivene at the enterance of with a fall of
5 feet which added to the probable decent in
this distance of 10 feet makes



  34
N 84° W. 102 Poles to the 2nd. Great Cataract of 47 feet 8
inches
the river at this Cataract is 473 yards
wide and confined    Clifts of rocks


  47.8
N. 86° W. 135 Poles passing a fall of 6 feet 7 inches which
added to the probable decent of the water
above the pitch of 47 feet 8 inches makes a
fall of



  14.7
S 49° W. 58 Poles along the river water verry rapid    a
probable decline of 2 feet

    2
S 78° W. 156 Poles to a large fountain near the river.    prob-
able decent of the water in this distance may
be 3 feet


    3
S 25° W. 124 Poles on the river passing Several Small rapids
and Swift water    the probable decent is this
distans four feet


    4
S. 35° W 240 Poles passing a rock in the river on three trees
on the Lard. Bank the fall of the water within
this distance at least 8 feet


    8
S 58° W. 88 Poles up the river, the probable decent in this
distance Eighteen inches

    1.6
S 40° 80 Poles to the upper pitch of 26 feet 5 inches
river is here 580 yards wide.    to this fall add
the probable decent in this distance of 2 feet,
also [o]ne pitch above of 5 feet and the decent
from the head of the rapids of 18 feet ex-
clusive of the 5 feet pitch makeing in all 38
feet 5 inches
fall






  51.5
    4747 poles = 14 miles ¾ and 27 poles     Total Falls 360.2 ¾
S. 81° W. 320 Poles to the head of the rapids; passed a rivene
S. 55° W. 130 Poles along the river.    low banks.
S 36 W. 278 Poles to a tree on the edge of the water passd. a grove at 120
poles opposit to which the river is 1400 yards wide—
S 6° W. 140 Poles to a Small grove at a rapid on Ld Side.
S 64° E. 78 Poles to the lower point of a timber in a deep bend.—
S 14° E. 90 Poles to a tree in the bend opposit to Some low timber.—
S 17° W. 160 Poles to the river opposit to the enterance of Medicine River
which is 137 yards wide, and the Missouri just above it is 300
yards wide—
S 1° W. 88 Poles opposit to the lower point of a Small Island.—
S 45° E 170 Poles to Some low timber near Some old Lodges.—
S. 13° E. 380 Poles to the river opposit the lower poiont of white Bear
Island.—
N. 88° E. 70 Poles opposit to the lower point of a Second Island which is
Small.—
N. 71° E 120 Poles to a rockey hill Side opposit to a third Island which is
Seperated from the Lard. Shore by a very narrow Chanel.
S 25° E 664 Poles to a bend of the river.    passing the upper points of
the 1st & 3rd Island (at our Camp) at 144 Poles, and flattery
run at 284 further river wide Still low banks.—
S 70° E. 160 Poles to the top of a high hill near the moste extreme S East-
erly bend of the river—    from this point the Missouri bears
S 85° W. for about 10 miles.    the gap of the Mtn. where the
Missouri enters bears S. 25° W. [blank]    miles and the Peni-
cal of the South Mtn. bears N 84° E—

☞ from the Survey and estimate it results, that the Missouri experiences a decent of 360 feet 2 inches and ¾ in the distance of [blank] Miles and [blank] Poles— [4]

Portage No. 1 [5]

The course from the White Bear Islands above the portage N. 42° E 4 miles leaveing the riveens of flattery run to the right.    thence a course to the South Extremity of a ridge North of the South mountains for 8 miles & a half passing three riveens, the 2d is willow run. 11 miles from the Islands. Thence a course to the highest pinical of the North Mountain, leaveing the riveens of Portage or red Creek to the right, & the riveens of the river to the left to the mouth of Portage Creek 4 miles & a half, to the perogue which is on the river North Side & nearly opposit the place we buried Sundery articles is 1 mile down the river, The Swivel we hid under the rocks in a clift near the river a little above our lower camp

Course & Distance from White Bear Islands to the mouth of Portage Creek
N 42° E 4 miles to a ellevated part of the Plain
N 66° E 3 miles passed the head of a Drean
N 45° E 4 miles passed the head of a Drean
N. 18 E. 4 miles passed the head of a Drean
N. 10° W. 2 miles to the mouth of Portage Creek
N. 9 W.      ¾ & 46 P. to the perogue on South side of the R. [6]
  17 ¾ & 46 P. Portage through an open butifull plain
1. Here Clark has two sets of survey notes for the Great Falls. They differ sufficiently to justify printing both here under the date given for the first set, July 17–19, 1805. Someone has crossed through the first and rougher set of notes. Because the clearer set of notes and other material is placed in the midst of this first set, they have been slightly rearranged to preserve the integrity of each. (back)
2. This paragraph appears to be in Lewis's hand. (back)
3. Clark wrote this set of notes on four sheets (eight pages) he inserted in Voorhis No. 1 in the midst of the set of survey notes mentioned in the note above. This second set is much neater than the first and differs considerably from it, so both are printed. (back)
4. This paragraph is at the top of the map of the Great Falls area (see figure) together with an astronomical observation dated June 20, 1805, which is placed by date. (back)
5. This note on the Great Falls portage appears at the end of Voorhis No. 1, and is here placed with other portage survey material. (back)
6. This entire line and the total figures below appear to be in Lewis's hand. (back)