HomeMy WebLinkAboutMINUTES - 03231993 - 1.17 TO: BOARD OF SUPERVISORS, AS THE GOVERNING BODY OF THE CONTRA COSTA
COUNTY FLOOD CONTROL AND WATER CONSERVATION DISTRICT
FROM: J. MICHAEL WALFORD, CHIEF ENGINEER
DATE: March 23, 1993
SUBJECT: Authorize the Chief Engineer to Sign a Letter Agreement and Authorize the Issuance of
a Purchase Order to East Bay Regional Park District for Earthwork Required in
Conjunction with the Wildcat Creek Trail Project, North Richmond Area, (Project No. 7527-
6D8610)
SPECIFIC REQUEST(S) OR RECOMMENDATION(S) &BACKGROUND AND JUSTIFICATION
I. Recommended Action:
AUTHORIZE the Chief Engineer to sign a letter agreement with East Bay Regional Park District
(EBRPD) for their performance of earthwork required in conjunction with the Wildcat Creek Trail
Project in the North Richmond area.
AUTHORIZE the issuance of a purchase order to EBRPD in the amount of $30,000, for the
required earthwork.
If. Financial Impact:
The total earthwork cost of $30,000 will be paid from Flood Control Zone 7.
III. Reasons for Recommendations and Background:
In accordance with the Corps of Engineers (COE) calculations, the levee along the north bank
of the lower reach of the Wildcat Creek flood control project was projected to have a settlement
rate of 1.2 feet over 12 years. This settlement would not compromise the channel's capacity to
convey a 100-year storm, although it would reduce the amount of available freeboard above the
100-year water surface. The COE maintenance agreement requires the District to raise the top
of the levee whenever this settlement occurs.
Continued on Attachment: X SIGNATURE:
_ RECOMMENDATION OF COUNTY ADMINISTRATOR
RECOMMENDATION OF BOARD COMMITTEE
APPROVE OTHER
SIGNATURE(S):
ACTION OF BOARD ON MAR 2 3 1993 APPROVED AS RECOMMENDED OTHER
VOTE OF SUPERVISORS
SC UNANIMOUS (ABSENT )
AYES: NOES:
ABSENT: ABSTAIN:
,1 I hereby certify that this is a true and correct copy of
J J
19 an action taken and entered on the minutes of the
c\BO:bo23a.t3 Board of supervisors on the date shown.
ATTESTED: 1�^-,/ 2 3 /!F y 3 —
Orig.
—
Orig. Div: Public Works (Design Division) PHIL BATCHELOR,Cierk of the Board
Contact: John Johnson (313-2311) of Supervisors and county Administrator
cc: County Administrator Deputy
Auditor-Controller
PW Accounting: W. Quever f
1. 17
Authorize the Chief Engineer to Sign a Letter Agreement and Authorize the Issuance of a Purchase
Order to East Bay Regional Park District for Earthwork Required in Conjunction with the Wildcat Creek
Trail Project, North Richmond Area
Page 2
March 23, 1993
EBRPD has designed the Wildcat Creek Trail to be constructed on top of this levee. An EBRPD
design survey revealed that this degree of settlement has already occurred in some locations
along a 2000 foot stretch downstream of the Richmond Parkway. In order to facilitate
construction of the Trail, EBRPD has agreed to raise the top of the levee (to the COE's original
design elevation) as part of its Trail construction project. The District has in turn agreed to pay
the estimated cost of $30,000, which is considered a maintenance cost.
IV. Consequences of Negative Action:
If the purchase order is not issued, EBRPD will not be able to raise the top of the levee before
it constructs the Wildcat Creek Trail. Thus, when the COE mandates the District to raise the
levee top at a later date, EBRPD would be required to reconstruct its new Trail at that time.