HomeMy WebLinkAboutMINUTES - 07241990 - 2.9 TO: BOARD OF SUPERVISORS
FROM: J. MICHAEL WALFORD, PUBLIC WORKS DIRECTOR
DATE: JULY 24, 1990
SUBJECT: JUNE 12, 1990 BOARD REFERRAL - FLOOD CONTROL REQUIREMENTS
ON MINOR SUBDIVSION NO. 73-86, WALNUT CREEK AREA.
SPECIFIC REQUEST(S) OR RECOMMENDATIONS)&BACKGROUND AND JUSTIFICATION
I. Recommended Action:
1. Accept report of the Public Works Directo l regarding the "collect and
convey" drainage requirement for Minor Subdivision No. 73-86 being de-
veloped by Lawrence and Martha Kimmich.
2. Reaffirm the County's position regarding strict enforcement of the subdivi-
sion ordinance drainage requirements.
II. Financial Impact:
None.
III. Reasons for Recommendations and Background:
Mr. Kimmich owns approximately two acres in the Cherry Lane area of Walnut
Creek. The site contains several structures including one house and a cottage.
Mr. Kimmich wants to minor subdivide his site into four lots with one of the lots
containing the two residences.
Continued on Attachment: SIGNATURE:
_ RECOMMENDATION OF COUNTY ADMINISTRATOR
_ RECOMMENDATION OF BOARD COMMITTEE
APPROVE OTHER
SIGNATURE(S):
ACTION OF BOARD ON July 24, 1990 APPROVED AS RECOMMENDED OTHER X
DEFERRED decision on request to waive drainage requireients; and REQUESTED
Supervisor Schroder to meet with the property owner and Flood Control staff
to resolve the matter and report to the Board with recommended action.
VOTE OF SUPERVISORS
X UNANIMOUS (ABSENT 1
AYES: NOES:
ABSENT: ABSTAIN:
MFK:Iv I hereby certify that this Is a true and correct copy of
a:b0\24.t7 an action taken end entered on the minutes of the
Board of Superv)sqrs on the date shown.
Ori Div: Public Works ADMIN 0,90
ATresreo: a h
Orig. (ADMIN) PHIL TCH OR,Clerk of the Board
cc: SEE FAGE TWO of upeMsors and County Administrator
By . Deputy
Minor NO. 73-86, Kimmich
July 24, 1990
Page Two
Unfortunately, drainage in the area is surface flow except for an old inadequate
culvert that crosses Mr. Kimmich's property and discharges into the ground
depression at the Contra Costa Canal siphon. North of the siphon, downstream
of the Kimmich site, there are no drainage facilities for approximately 1500 feet.
We have had several engineers review the site and vicinity to determine the least
costly drainage solution that meets the requirements of"collect and convey". They
have concluded that all of the potential solutions are not economically feasible for
a four lot subdivision. Attached is a copy of a report on the matter.
Consistent with our previous recommendations, we recommend a strict compli-
ance with "collect and convey". It should be noted that the downstream developed
properties do not even contain a ditch to convey the sheet flow from the Kimmich
site and the 13 acre upstream of the site.
We recognize our position places a hardship on Mr. Kimmich. However, the long
term impact of continued infilling will worsen the existing drainage problems faced
by residents already living in the area.
IV. Consequences of Negative Action:
Failure to require adequate drainage as a part of the development process will
compound future flooding.
cc: County Administrator
County Counsel
Community Development
Mr. & Mrs. Kimmich