Lower Penitencia Creek Improvements Project

View from the Milmont Drive bridge facing downstream of Lower Penitencia Creek. Lower Penitencia Creek Lower Penitencia Creek receives storm flows from Berryessa Creek and into Coyote Creek. Construction has begun on Lower Penitencia Creek is located in the northeastern portion improvements to Berryessa Creek that will bring more storm of Santa Clara County within the City of Milpitas. Valley Water flows into Lower Penitencia Creek. In its existing condition, improved Lower Penitencia Creek in 1955 and in the 1980s Lower Penitencia Creek does not have the required capacity to as commercial development construction occurred in the carry the increased storm flows when Berryessa Creek flood surrounding area. Improvements included channel widening improvements are completed. and raising the levees to increase the creek’s capacity to carry storm flows and reduce flood risk. East of Lower Penitencia Creek, Valley Water completed the About the project Lower and Upper Berryessa Creek flood protection projects to provide a 100-year storm level of service, with work on Calera The Lower Penitencia Creek Improvements Project extends Creek planned for summer 2021. A 100-year storm event is an approximately one mile from its confluence with Coyote Creek to event that has a 1 percent chance of occurring in any given year. San Andreas Drive in Milpitas. This project is necessary to provide continued flood protection for residents and businesses currently The Lower Penitencia Creek Improvements Project’s planning protected along the one-mile project area. and design phases were funded by the California Department of Water Resources’ Proposition 1E grant. Valley Water’s Watershed Stream Stewardship is funding the construction of the flood improvements. North project limit: Coyote Creek con uence Dixon Landing Road N REACH 1 REACH 2 Milpitas

N. Milpitas Boulevard

Coyote Creek

Milmont Drive

Lower Penitencia Creek REACH 3 Jurgens Drive 880 C a l i f o

a Aspenridge Drive

r c

Mc Carthy Boulevard

l e

Milmont Drive REACH 4

Summerwind Drive Calera Creek

Fairview Way Berryessa Creek South project limit: San Andreas Drive San Andreas Drive

Flood protection Completion of the improvements along the Upper and Lower Berryessa Creek projects will increase storm flows to Lower Penitencia Creek during a 100-year event. This project would prevent the increased water flow from overtopping Lower Penitencia Creek banks, causing a flood.

This project’s completion is necessary to maintain the existing Federal Emergency Management Agency (FEMA) accreditation along the east levee located between California Circle and Berryessa Creek. The current accreditation is for a 100-year flood event and level of protection.

When improvements are completed for the Lower Penitencia and Berryessa Creek projects, Valley Water will update the FEMA flood insurance maps accordingly. Project objectives The Lower Penitencia Creek Improvement Project objectives are to: • Safely carry and prevent the overtopping of Lower Penitencia Creek from the increased Berryessa Creek storm flows. • Reduce flood risks by aligning the creek elevations where Coyote and Berryessa creeks meet. • Continue a 100-year level of flood protection to the surrounding homes, businesses, and public facilities. • Minimize the need for seasonal maintenance. • Maintain existing Federal Emergency Management Agency (FEMA) accreditation along the east levee located between California Circle and Berryessa Creek and ensure View from the north side levee that faces upstream of California Circle bridge. improvements meet certification requirements. Project schedule

Fiscal Year ‘13 ‘14 ‘15 ‘16 ‘17 ‘18 ‘19 ‘20 ‘21 ‘22 ‘23

Planning

Design

Acquire permits

Construction

Periodic project updates provided

Proposed Project Design phase The Lower Penitencia Creek Improvements Project is currently eac ooteProposed ree to terstateProject in the final design phase. The project consists of the following: eacProposed aiteace oote roadProposed ree to terstateProject • Vegetated bench built in the creek with native plants Existing maintenance road

• Relocation and raising of existing levees Proposed aiteace road eacProposed reocated ad ooteProposed ree to terstateProject • Construction of new floodwalls raised evee eet ier Existing maintenance road Proposed 50 ft. wetland vegetated bench Existing channel Proposed aiteace road eacProposed reocated ad oote ree to terstate raised evee eet ier Project milestones include: Existing maintenance road Proposed 50 ft. wetland vegetated bench Existing channel • Completion of design plans, project specifications, and cost Proposed aiteace road Proposed reocated ad estimate (PSE) with approval on the final PSE pending. Reachraised evee 2 eet — ier InterstateExisting maintenance 880 road to California Circle Proposed 50 ft. • Certification of the project’s Environmental Impact Report wetland vegetated bench Existing channel Proposed reocatedProposed ad 6 ft. oodwall raised evee eet ier by the Valley Water Board of Directors. Reach 2 — Interstate Existing880 maintenance to Califo road rnia Circle Proposed 50 ft. wetland vegetated bench Existing channel • Receiving permits from regulatory agencies: United States Proposed 6 ft. oodwall

Army Corps of Engineers, San Francisco Bay Regional Reach 2 — Interstate Existing880 maintenance to Califo road rnia Circle Water Quality Control Board, and California Department of Proposed 6 ft. oodwall Fish and Wildlife. Existing concrete lining Reach 2 — Interstate Existing880 maintenance to Califo road rnia Circle

Proposed 6 ft. oodwall Existing concrete lining Reach 3 — CaliforniaExisting Circle maintenance to road Milmont Drive

ReachProposed 3 — 5.5 ft.Califo oodwall r Existing concrete lining Proposed 5.5 ft. oodwall niaExisting Circle maintenance to road Milmont Drive

Proposed 5.5 ft. oodwall Existing concrete lining Proposed 5.5 ft. oodwall ReachProperty line 3 — CaliforniaExisting Circle maintenance to road Milmont Drive Property line Existing secondary channel Existing main channel Proposed 5.5 ft. oodwall Proposed 5.5 ft. oodwall ReachProperty line 3 — California Circle to Milmont Drive Property line Existing secondaExistingry maintenance road channel Existing main channel Proposed 5.5 ft. oodwall Proposed 5.5 ft. oodwall Property line Existing maintenance road Property line Existing secondary Reach 4 — Milmontchannel Drive to San Existing mainAndreas Drive channel

Property line Proposed 6 ft. oodwall Proposed maintenance roadProperty line Existing secondary Reach 4 — Milmontchannel Drive to San Existing mainAndreas Drive Existing maintenance roadchannel

Proposed 6 ft. oodwall Proposed maintenanceProposed roadlevee Reach 4 — Milmont Drive to San Andreasraised Drive 6 ft. higher Property line Existing maintenance road Property line

Proposed 6 ft. oodwall Proposed maintenanceProposed road levee raised 6 ft. higher Reach 4 — Milmont ExistingDrive concrete to lining San Andreas Drive Property line Existing maintenance road Property line

Proposed 6 ft. oodwall Proposed maintenanceProposed roadlevee Existing concrete lining raised 6 ft. higher tProperty a line dreas riveExisting ride maintenance eada road Property line

Proposed levee raised 6 ft. higher Existing concrete lining tProperty a line dreas rive ride eada Property line

ProposedProposed eada eada t a dreas riveExisting ride concrete liningeada Photo rendering of the steel sheet pile floodwall from inside the Waterstone ProposedProposed eada eada Development. The floodwall is the structure directly behind the wooden fence. The sheet pile will be permanently installed as part of the flood protection project t a dreas rive ride eada improvements. Existingisti San a Andreasdreas riveDrive ride Bridge ProposedProposed eada eada

Existingisti San a Andreasdreas riveDrive ride Bridge ProposedProposed eada eada

Existingisti San a Andreasdreas riveDrive ride Bridge

Existingisti San a Andreasdreas riveDrive ride Bridge Photo rendering of the steel sheet pile floodwall, the structure located by the Waterstone Development. You’re in a watershed We speak your language Si habla español y tiene preguntas sobre el contenido de A watershed is the Santa Clara County este mensaje por favor de comunicarse con Jose Villarreal area of land that al [email protected] o (408) 630-2879. Drains to Alameda County drains a common LOWER PENINSULA WATERSHEDS waterway. In Santa WEST VALLEY Nếu bạn nói tiếng Việt và có thắc mắc về nội dung của Clara County, our thông báo này, xin vui lòng liên hệ với Hoan Cutler creeks catch rain and GUADALUPE COYOTE [email protected] hoặc (408) 630-3135. runoff from storm drains WATERSHED WATERSHED and carry the water north 如果你說中文並對上述訊息有疑問, 請聯繫 Julia Tat, to San Francisco Bay or south to UVAS/LLAGAS WATERSHEDS 電郵 [email protected], 或者電話: (408) 630-3168. Monterey Bay. Along the way, some of the water fills reservoirs for drinking water, replenishes the underground aquifer and creates better habitat for fish and wildlife. This project is in the Coyote Watershed. Sixteen major creeks drain this 350-square-mile area. The county’s largest watershed extends from the urbanized valley floor upward to the vast natural areas of the Mt. Hamilton range. Coyote Creek, its main waterway, is the longest creek in the county.

To find out the latest information on Valley Water projects or to submit questions or comments, contact Bill Sanchez at (408) 630-2974 or [email protected] or use our Access Valley Water customer request system at https://delivr.com/2x9ff.

valleywater Join our mailing list: https://delivr.com/2uz9z