FLOOD07351

• County: Larimer
• Community: Estes Park
• Stream Name: Lawn Lake
• Basin: South Platte
• Title: Lawn Lake/Estes Park Flood 1982
• Date: 7/15/1982
• Prepared For: State of Colorado
• Floodplain - Doc Type: Flood Documentation Report

~

,

Lawn LaKe, OC-39
July 15, 1982

Page 4

Drlef ChronoloGY of Cvc,n' s:

Time

llem

5:15 P.M.

Arrive at the Cascade Lake 5ite. The
followlng contacts were made: Bob
Jarrett, USGS. Bill Farrar, eye-witness
to the fa ilure of Cascade Dam. Mr.
Farrar's phone number is [phone].
His address is 14303 Shumard Oak Woods.
San Antonio, TX 78249.

Mr. L. V. Davis, opecator of the Cascade
Cottages. Mr. Davis's phone number is
586-4748. His address is Estes Park,
Colorado 80517. Mr. Davis is an
eye-witness to the failure of Cascade Dan

Further physical inspection was performed
of the Cascade Dam site at this time.

Approx. 6:45 P.M.

Proceed to the Horseshoe Falls location
at the confluence of the Roaring River and
Fall River. Examine and photograph the
alluvial moraine deposited at the foot of
lhefalls.

8:15 P.M.

Depart Estes Park for Denver. Vehicle
mileage for 5950 is 45125.

9:55 P. M.

Arri ved in Denver.

Si te Inspection of Lawn Lake

An inspection of Lawn Lake was carried out by John VanSciver and Jim Norfleet with
the assistance of Roger Patterson. Thls inspection commenced at 1 :00 P. M. , and
was concluder! at 2:30 P.M. The followinq specific items were observed:

1. Spillway -- The emergency spillway is located at the left abutment of the dam
and consists of a natural rock channel, through glacial moraine,with trapezoidal
cross-section. (See photo 9.) A burried log forms the control section generally
in line with the downstream shoulder of the crest of the dam. (See photo 10.)
Driftwood debris had deposited in the channel about 20 feet downstream from the
control section as shown in photos 11 and 12. This driftwood had a height
approximately 12 inches above that of the bottom of the spillway channel and there
was evidence of recent water depths at the top of this driftwood pile. Grass
and small particles of paper were depOSited along the top of these driftwood logs
about 12 inches above the spillway bottom.