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---
type: "Bill"
title: "Protection of subsurface installations."
description: "Existing law requires every operator of a subsurface installation, except the Department of Transportation, to become a member of, participate in, and share in the costs of, a regional notification center. Existing law requires any person who plans to conduct any excavation to contact the appropriate regional notification center before commencing that excavation, as specified. Existing law defines a subsurface installation as any underground pipeline, conduit, duct, wire, or other structure. Existing law requires an operator of a subsurface installation, who receives notification of proposed excavation work, within 2 working days of that notification, excluding weekends and holidays, to mark the approximate location and number of subsurface installations that may be affected by the excavation or to advise that no subsurface installations operated by him or her would be affected. Existing law requires an operator of a subsurface installation that has failed to comply with these provisions to be liable to the excavator for damages, costs, and expenses."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20152016"
identifier: "SB 661"
citation: "California SB 661 (20152016)"
classification: ["bill"]
subjects: ["Protection of subsurface installations."]
status: "enacted"
primary_sponsors: ["Hill"]
version_count: 9
action_count: 47
vote_count: 13
first_action: "2015-02-27"
last_action: "2016-09-29"
source: "openstates"
source_identifier: "ocd-bill/4e8e1200-a75f-474c-91ba-3e2673b24bc1"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201520160SB661"
source_hash: "5e47c6df52d4787e709c6449c0355322a173542a3275d8524b978fdbb8bfe32e"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-ca"]
---
# California SB 661 (20152016) — Protection of subsurface installations.
Existing law requires every operator of a subsurface installation, except the Department of Transportation, to become a member of, participate in, and share in the costs of, a regional notification center. Existing law requires any person who plans to conduct any excavation to contact the appropriate regional notification center before commencing that excavation, as specified. Existing law defines a subsurface installation as any underground pipeline, conduit, duct, wire, or other structure. Existing law requires an operator of a subsurface installation, who receives notification of proposed excavation work, within 2 working days of that notification, excluding weekends and holidays, to mark the approximate location and number of subsurface installations that may be affected by the excavation or to advise that no subsurface installations operated by him or her would be affected. Existing law requires an operator of a subsurface installation that has failed to comply with these provisions to be liable to the excavator for damages, costs, and expenses.
## Version chain
The bill's text revisions, in order — the diff chain from filing to enrollment.
1. **02/27/15 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB661&version=20150SB66199INT)
2. **01/04/16 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB661&version=20150SB66197AMD)
3. **04/13/15 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB661&version=20150SB66198AMD)
4. **06/28/16 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB661&version=20150SB66196AMD)
5. **08/15/16 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB661&version=20150SB66195AMD)
6. **08/19/16 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB661&version=20150SB66194AMD)
7. **09/29/16 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB661&version=20150SB66192CHP)
8. **SB661** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201520160SB661)
9. **09/07/16 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB661&version=20150SB66193ENR)
## Votes
- Do pass. — **121** (pass) · lower
- Do pass as amended and be re-referred to the Committee on [Appropriations] — **102** (pass) · lower
- Placed on suspense file — **70** (pass) · upper
- Do pass, but first be re-referred to the Committee on [Appropriations] — **51** (pass) · upper
- SB 661 Hill Senate Third Reading Amendment Set #1**730** (pass) · lower
- Do pass — **61** (pass) · upper
- Do pass as amended. — **121** (pass) · lower
- Placed on suspense file — **70** (pass) · upper
- SB 661 Hill Senate Third Reading By SALAS — **6410** (pass) · lower
- 3rd Reading — **353** (pass) · upper
- Do pass, but first be re-referred to the Committee on [Judiciary] — **80** (pass) · upper
- W/O REF. TO FILE — **353** (pass) · upper
- Do pass, but first be re-referred to the Committee on [Appropriations] — **70** (pass) · upper
## Sponsors
- Hill — primary (person)
## Timeline
The legislative action history — every referral, reading, and vote.
- **2015-02-27** Introduced. To Com. on RLS. for assignment. To print. `introduction`
- **2015-03-02** From printer. May be acted upon on or after April 1.
- **2015-03-02** Read first time. `reading-1`
- **2015-03-12** Referred to Com. on GOV. & F. `referral-committee`
- **2015-04-08** Set for hearing April 22.
- **2015-04-13** From committee with author's amendments. Read second time and amended. Re-referred to Com. on GOV. & F. `referral-committee, reading-2, amendment-passage, committee-passage, reading-1`
- **2015-04-22** From committee: Do pass and re-refer to Com. on APPR. (Ayes 7. Noes 0. Page 725.) (April 22). Re-referred to Com. on APPR. `referral-committee, committee-passage-favorable, committee-passage`
- **2015-04-24** Set for hearing May 4.
- **2015-04-29** May 4 set for first hearing canceled at the request of author.
- **2015-05-01** Set for hearing May 11.
- **2015-05-11** May 11 hearing: Placed on APPR. suspense file.
- **2015-05-23** Set for hearing May 28.
- **2015-05-28** May 28 hearing: Held in committee and under submission.
- **2016-01-04** From committee with author's amendments. Read second time and amended. Re-referred to Com. on APPR. `referral-committee, reading-2, amendment-passage, committee-passage, reading-1`
- **2016-01-04** Withdrawn from committee.
- **2016-01-04** Re-referred to Com. on RLS. `referral-committee`
- **2016-01-06** Re-referred to Coms. on B., P. & E.D. and JUD. `referral-committee`
- **2016-01-07** Set for hearing January 11.
- **2016-01-08** Set for hearing January 12 in JUD. pending receipt.
- **2016-01-11** From committee: Do pass and re-refer to Com. on JUD. (Ayes 8. Noes 0. Page 2879.) (January 11). Re-referred to Com. on JUD. `referral-committee, committee-passage-favorable, committee-passage`
- **2016-01-12** From committee: Do pass and re-refer to Com. on APPR. (Ayes 5. Noes 1. Page 2886.) (January 12). Re-referred to Com. on APPR. `referral-committee, committee-passage-favorable, committee-passage`
- **2016-01-14** Set for hearing January 19.
- **2016-01-19** January 19 hearing: Placed on APPR. suspense file.
- **2016-01-20** Set for hearing January 21.
- **2016-01-21** From committee: Do pass. (Ayes 6. Noes 1. Page 2935.) (January 21). `committee-passage-favorable, committee-passage`
- **2016-01-25** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2016-01-26** Read third time. Passed. (Ayes 35. Noes 3. Page 2954.) Ordered to the Assembly. `reading-3, passage, reading-1`
- **2016-01-26** In Assembly. Read first time. Held at Desk. `reading-1`
- **2016-04-28** Referred to Com. on U. & C. `referral-committee`
- **2016-05-31** June 8 set for first hearing canceled at the request of author.
- **2016-06-27** From committee: Do pass as amended and re-refer to Com. on APPR. (Ayes 10. Noes 2.) (June 22). `committee-passage-favorable, committee-passage, amendment-passage`
- **2016-06-28** Read second time and amended. Re-referred to Com. on APPR. `referral-committee, reading-2, amendment-passage, reading-1`
- **2016-08-03** August 3 set for first hearing. Placed on APPR. suspense file.
- **2016-08-12** From committee: Do pass as amended. (Ayes 12. Noes 1.) (August 11). `committee-passage-favorable, committee-passage, amendment-passage`
- **2016-08-15** Read second time and amended. Ordered to second reading. `amendment-passage, reading-2, reading-1`
- **2016-08-16** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2016-08-19** Read third time and amended. (Ayes 73. Noes 0. Page 5967.) `reading-3, amendment-passage, reading-1`
- **2016-08-19** Ordered to third reading.
- **2016-08-24** Re-referred to Com. on U. & C. pursuant to Assembly Rule 77.2. `referral-committee`
- **2016-08-30** From committee: Do pass. (Ayes 12. Noes 1.) (August 30). `committee-passage-favorable, committee-passage`
- **2016-08-30** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2016-08-31** Read third time. Passed. (Ayes 64. Noes 10. Page 6520.) Ordered to the Senate. `reading-3, passage, reading-1`
- **2016-08-31** In Senate. Concurrence in Assembly amendments pending.
- **2016-08-31** Assembly amendments concurred in. (Ayes 35. Noes 3. Page 5594.) Ordered to engrossing and enrolling. `committee-passage-favorable, amendment-passage`
- **2016-09-09** Enrolled and presented to the Governor at 3:30 p.m.
- **2016-09-29** Approved by the Governor. `executive-signature`
- **2016-09-29** Chaptered by Secretary of State. Chapter 809, Statutes of 2016.
## Source
OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/4e8e1200-a75f-474c-91ba-3e2673b24bc1`. Confidence: reported (aggregated from official California legislature records).